No.1-84 March

Total Page:16

File Type:pdf, Size:1020Kb

No.1-84 March Monash • eVI8W VVhot's New InEducation,Research and Community Service Registered lly Australia Posl- publication No. VBG 2204 1-84 The English language is a problem lor a great many migrants. according to a recent survey by the Monash Centre for Migrant Studies. Language train ing in the workplace and in work hours needs ISSN0159-950 to be promoted more effectively, the study says. Photo : Herve Alleaume. Survey reveals migrant language problems A SURVEY conducted by the Monash Housebound women. young unemployed the length of residence in Australia and the Centre for Migrant Studies has revealed adults, factory workers {especially those in ability to speak and understand English, widespread problems in speaking. jobs vulnerable to the pressure of structural Forty-eight per cent of those under 30 had understanding. reading end writing and technological change} and the aged were a lower than minimum "survival" level of English among overseas-born adults Jiving chosen as special target groups, proficiency in speaking. In writing. the figure in Melbourne's western suburbs. The migrants were interviewed and given was 70 per cent. Older people appeared to The study. conducted by Mr John McKay. the Australian Second Language' Proficiency have more problems with reading and writing Ms Susan Manton and Assoclete Profes­ Rating {ASLPRI test to test their proficiency English than with understanding it. sor Michael Clyne for the Department of in English, Different language groups differed also in Immigration and Ethnic Affa irs. has been The tests showed that in English speaking their ability to use the English language . publ ished in the Adult Migrant Education skills. 44 per cent of people in the Yarraville Vietnamese. Serbian. Macedonian. Croatian Program series " Studies in Adult Migrant sample had not reached the minimum "sur­ and Turkish speakers, in part icular. had Education" , vival " proficiency - the level of language " rather low average scores" for spoken A sample of 337 migrants. w ith a diverse needed to sat isfy minimum levels of English. When it came to written English a lingu istic background. took part in the study courtesy. to purchase goods in shops. to get greater number of language groups had which was carried out in the Yarraville. St around the city and function at work. In problems. Albans and Maribyrnong-Avondale Heights Maribyrnong-Avondale Heights the figure These ethnic differences. the autho rs areas. was 24 per cent and in St Albans 18 per believe , are probably related to the time The migrants' native tongues included cent. spent i n Australia by the various Alban ian. Arabic, Chinese, Croatian. German. When it came to writing skills. 63 per cent communities, Greek. Italian. Macedonian. Maltese, Polish. of the Yarraville sample were below the Many people interviewed by bilingual in­ Serbian. Serbo-Croatian. Spanish. Turkish minimum "survival" level. The figure in St terviewers expressed a desire to improve and Vietnamese. Albans was 44 per cent and in Maribyrnong­ their English to enable them to communicate Avondale Heights. 36 per cent. more effectively with their children and to MONASH REVIEW is produced five times While there was no sign ificant sex help them in their school activities. yearly by the Information Office. Monash difference. there was a signifioant Sixty-two per cent of parents admitted University. Wellington Rood. Clayton, Victor­ ia. 3168. Inquiries should be addressed to relationship between age and English skills, they had found communication with school the Editor, c/o the Information Office. and a strong relationship between the level of education and ASLPR scores and between Registered lor posting as a peooc.car. Cateqory 8 Continued overleaf MONASH REVIEW MARCH 1984 Continued from Page 1 sought for each part icular area and ethn ic grou p: ' it says. The aut hors of the study make t he authorities difficult or moderately difficult. following recommendations: More than half the sample expressed the need also for improved English to make • Greater efforts should be made to contact w ith neighbors aasier and to broaden public ise language classes. the ir social life. • Language classes and other programs The study shows that working women do should promote activities that encouraga not necessarily have any w ider exposu re to contact w ith native speakers of English. English tha n the ir housebound counterparts. • There is a need to provide comb ined Most worked in factories as machi nists or language and skills-oriented programs. process workers. The job required no English • Programs need to vary to cater for and tea-breaks were genera lly spent w ith various preferences . and classes should be speakers of the same native language. With offered at a w ide variety of times . marr iage and the arrival of children there was • A great er role could be played by ethn ic a tendency for the family circle to narrow and and local community groups in the planning . exclude English speakers. organ isation and advert ising of classes. For many migrant fam ilies children are the • Transit ional education prog rams and main source of exposure to English. prog rams for the young unemployed should " A part from very recent arrivals in make provision for non-nativa speakers of Australia." the authors of the study say. English. " migrant children at school speak English to • For women there is a need for a range of activities linked with language learning. their peer group. They speak English at home Ms Susan Man /on also to brothers. sisters and cousins and • There is a case for multi-purpose com­ often to their parents. mun ity centres. used by a variety of groups · into wh ich " English acquisition can be in " In many cases the parents speak in the ir Engl ish-speaking workmates and local tegrated" . native language . but the child replies in instituti ons w it h specialist resources " . English. Often a form of inter-language is As w ith the locall y based community Despit e communication problems. tha used. classes. there naads to be specific plann ing vast major ity of migrants interview ed in tha "The presence of grandparents in the to cater for the special needs of each group . study appeared reasonably happy with their home increases the use of the first language Cult ural factors may make it diff icult for lives here. and most parents make conscious efforts to some young peop le (especially girlsl to take Nearly 90 per cent expressed approval of prevent their ch ildren losing t he use of thei r advantage of the programs organised on a the original decision to come to Australia. language. general basis. the study points out. Some Only six per ceni said they had come against "W here the child ren have left home the may not be allowed to go out alone. to go out the ir w ishes. use of English between the parents generally at night. or to take work outs ide the local More than 21 per cent said they would declines. especially when one or both the area. The special knowledge of tha com­ like to remain here for most of their lives and partne rs has left the workforce". 65 per cent saw their stay as permanent. This latter situation was particularly Only 12 per cent were unsure about their marked with the elderly Croat ian and Serbian 'Traditional classroom teaching futu re intentions. Nearly 52 par cent we re couples in the sample . One elderly couple already Austra lian cit izens and only 19 per who had returned to Australia from a visit to of English to adult migrants is cent were firm in their intention not to Yugoslavia had completely lost touch with not effective in most situations. change cit izenship status. English. Language training in the Most feel accepted . Nearly 60 per cent The study found that some people were workplace needs to be promoted said they were fully accepted by Australians able to satisfy the ir everyday needs ent irely in more effectively'. and a further 21 per cent felt accepted at a language other than English, although this least some of the tima. Only 15 per cent gave generally meant some degree of dependence a firm no to this Question. on the spouse or children for help and could mun ity groups is needed in these cases. the A large and wide-ranging program i, lead to feelings of inadequacy. Slightly more aut hors conclude. to design acceptable needed, the authors of the study conclude. than a third of parents said that a better programs. " t o persuade all Australians that command of English would ease their The study draws attention to the English commun icat ion prob lems are not simp ly the communicat ion problems with children. language deficiencies of the younger people fault of th e non-English speakers." Housebound women said they felt unsure in the sample wh ich it describes as " par­ Commu nication is a two-way process. of their English and were reluctant to use it ticu larly distress ing" . they point out. Australians need to be made even with othe r members of the fam ily for It points out that many of the young aware of this and shown how they can help fear of being laughed at. peop le w ho arrive in Austral ia w ith disrupted in communicat ing w ith peop le who are still The survey findings suggest that while the school and incompleted training are not laarning English. tradit iona l ( 'assroom teaching of English to catered for by existing schoo ls. educational Most migrants interview ed in the study adu lt m igrants has a role in certain instituti ons or training schoo ls.
Recommended publications
  • Some Unusual, Astronomically Significant Organic Molecules
    'lL-o Thesis titled: Some Unusual, Astronomically Significant Organic Molecules submitted for the Degree of Doctor of Philosophy (Ph,D.) by Salvatore Peppe B.Sc. (Hons.) of the Department of Ghemistty THE UNIVERSITY OF ADELAIDE AUSTRALIA CRUC E June2002 Preface Gontents Contents Abstract IV Statement of Originality V Acknowledgments vi List of Figures..... ix 1 I. Introduction 1 A. Space: An Imperfect Vacuum 1 B. Stellff Evolution, Mass Outflow and Synthesis of Molecules 5 C. Astronomical Detection of Molecules......... l D. Gas Phase Chemistry.. 9 E. Generation and Detection of Heterocumulenes in the Laboratory 13 L.2 Gas Phase Generation and Characterisation of Ions.....................................16 I. Gas Phase Generation of Ions. I6 A. Positive Ions .. I6 B. Even Electron Negative Ions 17 C. Radical Anions 2t tr. Mass Spectrometry 24 A. The VG ZAB 2}lF Mass Spectrometer 24 B. Mass-Analysed Ion Kinetic Energy Spectrometry......... 25 III. Characterisation of Ions.......... 26 A. CollisionalActivation 26 B. Charge Reversal.... 28 C. Neutralisation - Reionisation . 29 D. Neutral Reactivity. JJ rv. Fragmentation Behaviour ....... 35 A. NegativeIons.......... 35 Preface il B. Charge Inverted Ions 3l 1.3 Theoretical Methods for the Determination of Molecular Geometries and Energetics..... ....o........................................ .....39 L Molecular Orbital Theory........ 39 A. The Schrödinger Equation.... 39 B. Hartree-Fock Theory ..44 C. Electron Correlation ..46 D. Basis sets............ .51 IL Transition State Theory of Unimolecular Reactions ......... ................... 54 2. Covalently Bound Complexes of CO and COz ....... .........................58 L Introduction 58 tr. Results and Discussion........... 59 Part A: Covalently bound COz dimers (OzC-COr)? ............ 59 A. Generation of CzO¿ Anions 6I B. NeutralCzO+........
    [Show full text]
  • CURRICULUM VITAE Name: William Michael Irvine Born: August 31, 1936; Los Angeles, California, USA Educational Background: 1957
    CURRICULUM VITAE Name: William Michael Irvine Born: August 31, 1936; Los Angeles, California, USA Educational Background: 1957 Pomona College B.A. (summa cum laude) 1959 Harvard University M.A. (Physics) 1961 Harvard University Ph.D. (Physics) Professional Employment: 1961-62 Leiden University, Holland NATO Post-doc. Fellow 1962-66 Harvard Coll./Smith. Ast. Obs. Research Fellow/Physicist 1964-66 Harvard University Lecturer 1966-68 University of Massachusetts Associate Professor 1966-79 University of Massachusetts Chair, Astronomy Program 1966-78 Five College Astronomy Dept. Chairman 1969-2006 University of Massachusetts Professor 1973-74 Onsala Space Obs. (Sweden) Visiting Professor 1977 (summer) Kanazawa Inst. Tech. (Japan) Visiting Professor 1979-81 Onsala Space Obs. (Sweden) Acting Scientific Director 1985-1995 Five College Radio Astron. Obs. Director 1990 (winter) National Astron. Obs. (Japan) Visiting Professor 2004 (fall) INAOE (Mexico) Visiting Scientist 2006-present University of Massachusetts Professor Emeritus Research Specialization: Interstellar Medium, Planetary Science, Astrobiology Selected Scholarly Activities: COSPAR (Commissions F, B.1) American Astronomical Society (Heinemann Prize Committee, 1994-97; Nominating Committee, 1989-92, Chairman, 1990-91; Division for Planetary Sciences, Chairman, 1973-74, DPS Committee, 1972-75, 1978-81). Harlow Shapley Visiting Lecturer, AAS, 1975-76, 1978-79. American Geophysical Union. Royal Astronomical Society International Astronomical Union (Commissions 15, 16, 34, 51: Vice-President 2006- 2009; President 2009- 2012; Past President 2012-2015; Division F: Executive Committee 2012- 2015). International Scientific Radio Union. 1 International Society for the Study of the Origin of Life (Councillor, 2008-2011). Committee on Astmospheric Radiative Transfer, Radiation Commiss., IAMAP, 1973-81. Icarus Editorial Board, 1975-76, Associate Editor, 1976-91.
    [Show full text]
  • CHEMISTRY Catholic Junior College
    1 Catholic Junior College JC 2 Preliminary Examinations Higher 2 CANDIDATE NAME CLASS 2T CHEMISTRY 9729/01 Paper 1 Multiple Choice Tuesday 3 September 2019 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and NRIC/FIN number on the Answer Sheet in the spaces provided. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages and 1 blank page. [Turn over 2 3 −3 1 In a titration experiment, 15 cm of 0.10 mol dm phosphorous acid, H3PO3 was found to react with 10 cm3 of 0.30 mol dm−3 sodium hydroxide, NaOH. Using this information, deduce the formula of the salt formed in this neutralisation process. A NaH2PO3 C Na3PO3 B Na2HPO3 D Na3PO4 2 50 cm3 of a mixture of ethene and propane gas were exploded in excess oxygen. The volume of the residual gases was found to be 200 cm3. On being shaken with potassium hydroxide, the final volume was found to be 90 cm3.
    [Show full text]
  • Discovery of HC3O in Space: the Chemistry of O-Bearing Species in TMC-1? J
    Astronomy & Astrophysics manuscript no. 39351_final ©ESO 2020 October 12, 2020 Letter to the Editor + Discovery of HC3O in space: The chemistry of O-bearing species in TMC-1? J. Cernicharo1, N. Marcelino1, M. Agúndez1, Y. Endo2, C. Cabezas1, C. Bermúdez1, B. Tercero3; 4, and P. de Vicente4 1 Grupo de Astrofísica Molecular, Instituto de Física Fundamental (IFF-CSIC), C/ Serrano 121, 28006 Madrid, Spain. e-mail: : [email protected] 2 Department of Applied Chemistry, Science Building II, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan 3 Observatorio Astronómico Nacional (IGN), C/ Alfonso XII, 3, 28014, Madrid, Spain. 4 Centro de Desarrollos Tecnológicos, Observatorio de Yebes (IGN), 19141 Yebes, Guadalajara, Spain. Received; accepted ABSTRACT Using the Yebes 40m and IRAM 30m radio telescopes, we detected a series of harmonically related lines with a rotational constant B0=4460.590±0.001 MHz and a distortion constant D0=0.511±0.005 kHz towards the cold dense core TMC-1. High-level-of-theory + ab initio calculations indicate that the best possible candidate is protonated tricarbon monoxide, HC3O . We have succeeded in producing this species in the laboratory and observed its Ju-Jl = 2-1 and 3-2 rotational transitions. Hence, we report the discovery + of HC3O in space based on our observations, theoretical calculations, and laboratory experiments. We derive an abundance ratio + N(C3O)/N(HC3O )∼7. The high abundance of the protonated form of C3O is due to the high proton affinity of the neutral species. The chemistry of O-bearing species is modelled, and predictions are compared to the derived abundances from our data for the most prominent O-bearing species in TMC-1.
    [Show full text]
  • River Valley High School Year 6 Preliminary Examination Ii
    RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATION II CANDIDATE NAME CLASS 6 CENTRE INDEX 0 0 NUMBER S 3 0 4 4 NUMBER H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 21 Sep 2017 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Optical Answer Sheet in the spaces provided. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the Optical Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. _____________________________________________________________________________ This document consists of 16 printed pages and 0 blank pages. River Valley High School 9729/01 [Turn over 2017 Preliminary Examinations II KiasuExamPaper.com 2 For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. At room temperature and pressure, a sample of 2 dm3 of polluted air was passed through limewater so that all the carbon dioxide present was precipitated as calcium carbonate. The mass of calcium carbonate formed was 0.05 g.
    [Show full text]
  • River Valley High School Year 6 Preliminary Examination Ii
    RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATION II CANDIDATE NAME CLASS 6 CENTRE INDEX 0 0 NUMBER S 3 0 4 4 NUMBER H1 CHEMISTRY 8872/01 Paper 1 Multiple Choice 21 Sep 2017 50 mins Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Optical Answer Sheet in the spaces provided. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the Optical Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. _____________________________________________________________________________ This document consists of 14 printed pages. River Valley High School 8872/01 [Turn over 2017 Preliminary Examinations II 2 Section A For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. At room temperature and pressure, a sample of 2 dm3 of polluted air was passed through limewater so that all the carbon dioxide present was precipitated as calcium carbonate. The mass of calcium carbonate formed was 0.05 g.
    [Show full text]
  • ETUDE EN ONDES MILLIMETRIQUES ET SUBMILLIMETRIQUES D'especes REACTIVES : Détection D'ions Et De Radicaux Libres Au Laboratoire Et Dans Le Milieu Interstellaire
    laboratoire de spectroscopie hertzienne Sc, 5:; ;., 1 No d'ordre : 684 présentée à L'UNIVERSITE DES SCIENCES ET TECHNIQUES DE LlLLE FLANDRES ARTOIS Par Claire DEMUYNCK ETUDE EN ONDES MILLIMETRIQUES ET SUBMILLIMETRIQUES D'ESPECES REACTIVES : Détection d'ions et de radicaux libres au laboratoire et dans le milieu interstellaire Soutenue le 30 Mai 1986 devant la Commission d'Examen Membres du Jury : Président : J. LEQUEUX, Astronome titulaire - Observatoire de MARSEILLE Rapporteurs : J.L. DESTOMBES, Chargé de Recherches - Université de LlLLE I E. HI ROTA, Professeur - lnstitute for Molecular Science - OKAZAKI (Japon) A. OMONT, Professeur - Université de GRENOBLE M. WINNEWISSER, Professeur - Université de GIESSEN (R.F.A.) Examinateurs : G. JOURNEL, Professeur - Université de LlLLE 1 S. LEACH, Directeur de Recherches - Université de PARIS XI B. MACKE, Professeur - Université de LILLE I R. WERTHEIMER, Professeur Emerite - Université de LlLLE 1 UNIVERSITE DES SCIENCES ET TECHNIQUES DE LlLLE FLANDRES ARTOIS - U.F.R. DE PHYSIQUE REMERCIEMENTS Ce ;t(tav&, quX. a &té aé&é à L'UnhvmiAé de LXe 7, dam Le 1abotra;tahe de Spe&oacopie ff &Zienne (U. A. 244), n'a pu &the mené à bien que ghiice au concorn de diadérted dac/tewcn davohabL~n : L' é;trtoLte cofibona;tion qui a ' uk Gdabfie avec La as.ttophyaicie~ a &té un Uément ;tauAl à 6aLt d&cinid powz Le développanent de noa ;frtavaux, & C' ut Jamu LEQUEUX qui, avec 1' en;thous&me &t géného- aaé qu' on -eLu con&, uk à L' otLigine de noa conta& avec lu comu- muté decl /radiaa;ttLanom~n~/ta.nçain. Qu'il lfitouve id L' exphennion de ma hecunMainaance, non aeuLemen;t pou avoh accepXE k phenidence de ce jmy, mdin auilai pom Ra con~iancee.t L'amLZLé qu'a noun a Roujo~ kémoigné~cl, & pou Le aou;tien commqutd a appotclté à no&e équipe e-t à L' euemble du Labom,to&e.
    [Show full text]
  • Recent Observations of Organic Molecules in Nearby Cold, Dark Interstellar Clouds
    RECENT OBSERVATIONS OF ORGANIC MOLECULES IN NEARBY COLD, DARK INTERSTELLAR CLOUDS H. Suzuki, M. Ohishi, M. Morimoto, and N. Kaifu Nobeyama Radio Observatory Nobeyama, Minamisaku, Nagano 38413, Japan P. Friberg and W.M. Irvine Department of Physics and Astronomy, and Five College Radio Astronomy Observatory University of Massachusetts, Amherst, MA 01003 H. E. Matthews Herzberg Institute for Astrophysics National Research Council of Canada Ottawa, Ontario, K1A 0R6, Canada S. Saito Institute for Molecular Science Okazaki 444, Japan ABSTRACT. We report recent investigations of the organic chemistry of relatively nearby cold, dark interstellar clouds. Specifically, we confirm the presence of interstellar tricarbon monoxide (C3O) in Taurus Molecular Cloud 1 (TMC-1); report the first detection in such regions of acetaldehyde (CH3CHO), the most complex oxygen-containing organic molecule yet found in dark clouds; report the first astronomical detec­ tion of several molecular rotational transitions, including the J=18-17 and 14-13 transitions of cyanodiacetylene (HC5N), the loi~Ooo tran­ sition of acetaldehyde, and the J=5-4 transition of C3O; and set a significant upper limit on the abundance of cyanocarbene (HCCN) as a result of the first reported interstellar search for this molecule. 1. INTRODUCTION Throughout most of the history of spectral line radio astronomy those concentrations of the interstellar medium thought to exhibit the most complex chemistry have been the giant molecular clouds, including par­ ticularly the region Sgr B2 located near the center of the Milky Way Galaxy and the Orion molecular cloud, the closest such region to the solar system. Such giant molecular clouds are the most massive objects in our Galaxy and are obvious sites of current massive star formation.
    [Show full text]
  • Subject Index
    Cambridge University Press 978-1-107-16928-9 — Molecular Astrophysics A. G. G. M. Tielens Index More Information Subject Index ab-initio quantum chemistry, 50 anorthite, 487, 488 absorption spectroscopy, 37–41 apolar species, 33 accretion disk, 452 appearance energy, 293, 299, 302 accretion rate, 226 arenes, 33 acetylenic species, 331, 351, 402–404, 412, 512 aromatic hydrocarbons, 5, 7, 33 acid, 30, 35, 397 Aromatic Infrared Band, 258, 568–576, 592 actanoids, 23 Aromatic Infrared Band, assignments, 578 action integral, 229, 230 Aromatic Infrared Band, plateau emission, 573, 574 activity, non-ideal behavior, 142, 147 Aromatic Infrared Band, profiles, 569–572, adduct formation, 304, 312 575, 581 AGB, 402, 542, 549, 604–609 Aromatic Infrared Band, spectral fits, 575, 576 AGN toroid, 11 Aromatic Infrared Band, strength variation, AIB, see Aromatic Infrared Band 572, 573 albite, 487, 488 aromatic molecules, 397 alcohols, 7, 31, 34, 35, 397, 398 aromaticity, 260–263 aldehydes, 7, 31, 34, 35, 397, 398, 479, 508 Arrhenius law, 291 aliphatic group, 580, 584 astrobiology, 2, 4 alkali halides, 219 asymmetric top, 60, 64, 84, 118 alkali metals, 23 atomic force microscope (AFM), 46, 51 alkaline, 30 atomic number, 21, 23–25 alkaline earth metals, 23 aufbau principle, 22, 29 alkanes, 31, 32, 397, 402 autoionization, 193, 198, 269, 300 alkenes, 31, 32, 183, 261, 397, 402 alkynes, 31, 32, 183, 397, 402 B3LYP functional, 52 aluminum oxide, 145, 146, 148, 487, 488 backward reaction, 142 ambipolar diffusion, 383, 392, 394, 407, 455 bandhead, 83 ambipolar diffusion
    [Show full text]
  • Arxiv:1409.6565V1 [Astro-Ph.SR] 23 Sep 2014 Bevtroato´Mc Ainl(A,IN.Clealfons Calle IGN)
    The origin of complex organic molecules in prestellar cores C. Vastel1,2 Universit´ede Toulouse, UPS-OMP, IRAP, Toulouse, France CNRS, IRAP, 9 Av. colonel Roche, BP 44346, 31028 Toulouse Cedex 4, France [email protected] C. Ceccarelli3,4 and B. Lefloch3,4 Univ. Grenoble Alpes, IPAG, F-38000 Grenoble, France CNRS, IPAG, F-38000 Grenoble, France R. Bachiller4 Observatorio Astron´omico Nacional (OAN, IGN). Calle Alfonso XII,3. 28014 Madrid, Spain Received - ; accepted - ABSTRACT Complex organic molecules (COMs) have been detected in a variety of environments, including cold prestellar cores. Given the low temperature of these objects, these last detections challenge existing models. We report here new observations towards the prestellar core L1544. They are based on an unbiased spectral survey of the 3mm band at the IRAM-30m telescope, as part of the Large Program ASAI. The observations allow us to provide the full census of the oxygen bearing COMs in this source. We detected tricarbon monoxide, methanol, acetaldehyde, formic acid, ketene, and propyne with abundances varying from 5 × 10−11 to 6 × 10−9. The non-LTE analysis of the methanol lines shows that they are likely emitted at the border of the core, at a radius 4 −3 of ∼ 8000 AU where T ∼ 10 K and nH2 ∼ 2× 10 cm . Previous works have shown arXiv:1409.6565v1 [astro-ph.SR] 23 Sep 2014 that water vapour is enhanced in the same region because of the photodesorption of water ices. We propose that a non-thermal desorption mechanism is also responsible for the observed emission of methanol and COMs from the same layer.
    [Show full text]
  • The Chemistry of O-Bearing Species in TMC-1? J
    A&A 642, L17 (2020) Astronomy https://doi.org/10.1051/0004-6361/202039351 & c ESO 2020 Astrophysics LETTER TO THE EDITOR + Discovery of HC3O in space: The chemistry of O-bearing species in TMC-1? J. Cernicharo1, N. Marcelino1, M. Agúndez1, Y. Endo2, C. Cabezas1, C. Bermúdez1, B. Tercero3,4, and P. de Vicente4 1 Grupo de Astrofísica Molecular, Instituto de Física Fundamental (IFF-CSIC), C/ Serrano 121, 28006 Madrid, Spain e-mail: [email protected] 2 Department of Applied Chemistry, Science Building II, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan 3 Observatorio Astronómico Nacional (IGN), C/ Alfonso XII, 3, 28014 Madrid, Spain 4 Centro de Desarrollos Tecnológicos, Observatorio de Yebes (IGN), 19141 Yebes, Guadalajara, Spain Received 6 September 2020 / Accepted 30 September 2020 ABSTRACT Using the Yebes 40m and IRAM 30m radio telescopes, we detected a series of harmonically related lines with a rotational constant B0 = 4460.590 ± 0.001 MHz and a distortion constant D0 = 0.511 ± 0.005 kHz towards the cold dense core TMC-1. High-level-of- + theory ab initio calculations indicate that the best possible candidate is protonated tricarbon monoxide, HC3O . We have succeeded in producing this species in the laboratory and observed its Ju − Jl = 2–1 and 3–2 rotational transitions. Hence, we report the discovery + of HC3O in space based on our observations, theoretical calculations, and laboratory experiments. We derive an abundance ratio + N(C3O)/N(HC3O ) ∼ 7. The high abundance of the protonated form of C3O is due to the high proton affinity of the neutral species.
    [Show full text]
  • List of Molecules and Ions with 2 to 10 Atoms
    List of Molecules and Ions with 2 to 10 Atoms Diatomic (44) Molecule Designation Mass Ions AlCl Aluminium monochloride [39] [40] 62.5 — AlF Aluminium monofluoride [39] [41] 46 — AlO Aluminium monoxide [42] 43 — — Argonium [43] [44] 41 ArH+ C2 Diatomic carbon [45] [46] 24 — — Fluoromethylidynium 31 CF+[47] CH Methylidyne radical [32] [48] 13 CH+[49] CN Cyanogen radical [39] [48] [50] [51] 26 CN+,[52] CN−[53] CO Carbon monoxide [39] [54] [55] 28 CO+[56] CP Carbon monophosphide [51] 43 — CS Carbon monosulfide [39] 44 — FeO Iron(II) oxide [57] 82 — — Helium hydride ion [58] [59] 5 HeH+ H2 Molecular hydrogen [60] 2 — HCl Hydrogen chloride [61] 36.5 HCl+[62] HF Hydrogen fluoride [63] 20 — HO Hydroxyl radical [39] 17 OH+[64] KCl Potassium chloride [39] [40] 75.5 — NH Nitrogen monohydride [65] [66] 15 — N2 Molecular nitrogen [67] [68] 28 — NO Nitric oxide [69] 30 NO+[52] NS Nitrogen sulfide [39] 46 — NaCl Sodium chloride [39] [40] 58.5 — — Magnesium monohydride cation 25.3 MgH+[52] NaI Sodium iodide [70] 150 — O2 Molecular oxygen [71] 32 — PN Phosphorus mononitride [72] 45 — PO Phosphorus monoxide [73] 47 — SH Sulfur monohydride [74] 33 SH+[75] SO Sulfur monoxide [39] 48 SO+[49] SiC Carborundum [39] [76] 40 — SiN Silicon mononitride [39] 42 — SiO Silicon monoxide [39] 44 — Molecule Designation Mass Ions SiS Silicon monosulfide [39] 60 — TiO Titanium oxide [77] 63.9 — The H+ 3 cation is one of the most abundant ions in the universe. It was first detected in 1993. [78] [79] Triatomic (41) Molecule Designation Mass Ions AlNC Aluminium isocyanide
    [Show full text]