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The Dipole Anisotropy of the 2 Micron All-Sky Redshift Survey
Mon. Not. R. Astron. Soc. 368, 1515–1526 (2006) doi:10.1111/j.1365-2966.2006.10243.x The dipole anisotropy of the 2 Micron All-Sky Redshift Survey Downloaded from https://academic.oup.com/mnras/article-abstract/368/4/1515/1151639 by MIDDLE EAST TECHNICAL UNIVERSITY LIBRARY user on 24 July 2020 , P. Erdo˘gdu,1,2 J. P. Huchra,3 O. Lahav,2 4 M. Colless,5 R. M. Cutri,6 E. Falco,3 T. George,7 T. Jarrett,6 D. H. Jones,8 C. S. Kochanek,9 L. Macri,10 J. Mader,11 N. Martimbeau,3 M. Pahre,3 Q. Parker,12 A. Rassat4 and W. Saunders5,13 1Department of Physics, Middle East Technical University, 06531 Ankara, Turkey 2School of Physics & Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD 3Harvard-Smithsonian Center of Astrophysics, 60 Garden Street, MS-20, Cambridge, MA 02138, USA 4Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT 5Anglo-Australian Observatory, PO Box 296, Epping, NSW 2052, Australia 6Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA 7California Institute of Technology, 4800 Oak Grove Drive, 302-231, Pasadena, CA 91109, USA 8Research School of Astronomy and Astrophysics, Mount Stromlo, and Siding Spring Observatories, Cotter Road, Weston Creek, ACT 2611, Australia 9Department of Astronomy, Ohio State University, 4055 McPherson Lab, 140 West 18th Avenue, Columbus, OH 43221, USA 10National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85726, USA 11W.M. Keck Observatory, Kamuela, HI 96743, USA 12Department of Physics, Macquarie University, Sydney, NWS 2109, Australia 13Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ Accepted 2006 February 23. -
Draft181 182Chapter 10
Chapter 10 Formation and evolution of the Local Group 480 Myr <t< 13.7 Gyr; 10 >z> 0; 30 K > T > 2.725 K The fact that the [G]alactic system is a member of a group is a very fortunate accident. Edwin Hubble, The Realm of the Nebulae Summary: The Local Group (LG) is the group of galaxies gravitationally associ- ated with the Galaxy and M 31. Galaxies within the LG have overcome the general expansion of the universe. There are approximately 75 galaxies in the LG within a 12 diameter of ∼3 Mpc having a total mass of 2-5 × 10 M⊙. A strong morphology- density relation exists in which gas-poor dwarf spheroidals (dSphs) are preferentially found closer to the Galaxy/M 31 than gas-rich dwarf irregulars (dIrrs). This is often promoted as evidence of environmental processes due to the massive Galaxy and M 31 driving the evolutionary change between dwarf galaxy types. High Veloc- ity Clouds (HVCs) are likely to be either remnant gas left over from the formation of the Galaxy, or associated with other galaxies that have been tidally disturbed by the Galaxy. Our Galaxy halo is about 12 Gyr old. A thin disk with ongoing star formation and older thick disk built by z ≥ 2 minor mergers exist. The Galaxy and M 31 will merge in 5.9 Gyr and ultimately resemble an elliptical galaxy. The LG has −1 vLG = 627 ± 22 km s with respect to the CMB. About 44% of the LG motion is due to the infall into the region of the Great Attractor, and the remaining amount of motion is due to more distant overdensities between 130 and 180 h−1 Mpc, primarily the Shapley supercluster. -
Index to JRASC Volumes 61-90 (PDF)
THE ROYAL ASTRONOMICAL SOCIETY OF CANADA GENERAL INDEX to the JOURNAL 1967–1996 Volumes 61 to 90 inclusive (including the NATIONAL NEWSLETTER, NATIONAL NEWSLETTER/BULLETIN, and BULLETIN) Compiled by Beverly Miskolczi and David Turner* * Editor of the Journal 1994–2000 Layout and Production by David Lane Published by and Copyright 2002 by The Royal Astronomical Society of Canada 136 Dupont Street Toronto, Ontario, M5R 1V2 Canada www.rasc.ca — [email protected] Table of Contents Preface ....................................................................................2 Volume Number Reference ...................................................3 Subject Index Reference ........................................................4 Subject Index ..........................................................................7 Author Index ..................................................................... 121 Abstracts of Papers Presented at Annual Meetings of the National Committee for Canada of the I.A.U. (1967–1970) and Canadian Astronomical Society (1971–1996) .......................................................................168 Abstracts of Papers Presented at the Annual General Assembly of the Royal Astronomical Society of Canada (1969–1996) ...........................................................207 JRASC Index (1967-1996) Page 1 PREFACE The last cumulative Index to the Journal, published in 1971, was compiled by Ruth J. Northcott and assembled for publication by Helen Sawyer Hogg. It included all articles published in the Journal during the interval 1932–1966, Volumes 26–60. In the intervening years the Journal has undergone a variety of changes. In 1970 the National Newsletter was published along with the Journal, being bound with the regular pages of the Journal. In 1978 the National Newsletter was physically separated but still included with the Journal, and in 1989 it became simply the Newsletter/Bulletin and in 1991 the Bulletin. That continued until the eventual merger of the two publications into the new Journal in 1997. -
Galaxies Discovered Behind the Milky Way by the Dwingeloo Obscured Galaxies Survey P. A. Henning Institute for Astrophysics
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server Galaxies Discovered Behind the Milky Way by the Dwingeloo Obscured Galaxies Survey P. A. Henning Institute for Astrophysics, University of New Mexico 800 Yale Blvd., NE, Albuquerque, NM 87131 R. C. Kraan-Korteweg Observatoire de Paris-Meudon, D.A.E.C. 92195 Meudon Cedex, France and Astronomy Department, University of Guanajuato Apartado Postal 144, Guanajuato, GTO 36000, Mexico A. J. Rivers Institute for Astrophysics, University of New Mexico 800 Yale Blvd., NE, Albuquerque, NM 87131 A. J. Loan Institute of Astronomy, University of Cambridge Madingley Road, Cambridge CB3 0HA, UK O. Lahav Institute of Astronomy, University of Cambridge Madingley Road, Cambridge CB3 0HA, UK and Anglo Australian Observatory P.O. Box 296, Epping, NSW 2121, Australia W. B. Burton Leiden Observatory Postbus 9513, NL-2300 RA Leiden, The Netherlands 1 Abstract Our Galaxy blocks a significant portion of the extragalactic sky from view, hampering studies of large-scale structure. This produces an incom- plete knowledge of the distribution of galaxies, and, assuming galaxies trace mass, of the gravity field. Further, just one unrecognized, nearby massive galaxy could have large influence over the Milky Way’s motion with respect to the Cosmic Microwave Background. Diligent surveys in the optical and infrared wavebands can find galaxies through moderate Galactic gas and dust, but close to the Galactic Plane, only radio surveys are effective. The entire northern Zone of Avoidance is being searched at 21 cm for galaxies using the Dwingeloo 25-m telescope. -
Russian Networks Capable to Observe Neos at Near Space
52-th Session of STSC UN COPUOS Vienna, Austria, February 3, 2015 The NEO problem: current activities in Russia V.Emel’yanenko Basic aspects of the NEO problem Major constituents of the NEO (Asteroid/Comet Impact Hazard - ACH) problem are: Detection and characterization Risk assessment Protection and mitigation We work in all areas at both national and international levels. 2 General activities (Feb 2014 – Feb 2015) Studies of the Chelyabinsk meteorite; Completion of the 1.6 m telescope for NEO detection; Work on the development of a moderate aperture telescope national network aimed to detection and monitoring of NEOs; Various projects of space based means to detect and to counteract dangerous bodies; Construction of a data-bank on impact consequences . 3 Some lessons of the Chelyabinsk event (15 Feb, 2013): Asteroids of decameter size could be very dangerous; We need to know about coming threat reasonably in advance; Day time asteroids are unobservable by any ground based facilities. 4 En route to the NEO detection AZT-33IR AZT-33VM The telescope АZТ-33VM ( ∅ 1.6 m) for the mass detection of NEOs at large distances is nearing completion. First light is expected in the fall of 2015. 5 ISON telescopes for NEO surveys and follow- up observations ISON (International Scientific Optical Network) – one of the largest Russian networks capable to observe NEOs at near space. 6 ISON : results on asteroids Hundreds of light curves were constructed for tens of NEAs (3122) Florence, (20187) Janapittichova, (25916) 2001 CP44, (162004) 1991 VE, (7888) -
Hered in These Proceedings with the Aim to Keep Track of These Very Interesting Days
Proceedings of GAIA-FUN-SSO 2014 Third “Gaia Follow-up Network for Solar System Objects” Workshop held at IMCCE/Paris Observatory 2014, November 24 – 26 Institut de mécanique céleste et de calcul des éphémérides Observatoire de Paris Legal Deposite – June 2015 ISBN 2-910015-73-4 Foreword The observation of Solar System Objects (SSO) by the Gaia space astrometry mission will be constrained by a scanning law. Much detection of interesting objects may occur with no possibility of further observations by the probe. These objects will then require complementary ground-based observations. Among them, previously unknown Near- Earth Objects, fast moving towards the Earth or going away from it could be found. Several objects discovered by Gaia could also be Inner-Earth Objects, as the probe will observe at rather low Solar elongations. In order to confirm from the ground the discoveries made in space and to follow interesting targets, a dedicated network is organized, the Gaia Follow-Up Network. This task is performed in the frame of the Coordination Unit 4 of the Gaia Data Processing and Analysis Consortium (DPAC), devoted to data processing of specific objects. The goal of the network is to improve the knowledge of the orbit of poorly observed targets by astrometric observations on alert. This activity is coordinated by a central node interacting with the Gaia data reduction pipeline all along the mission. In 2010 and 2012, we had organized the first two workshops in order to initiate the network and to meet the participants. In 2014, almost one year after the launch of Gaia, we organize the third Gaia-FUN-SSO workshop in Paris in order to discuss further the coordination of the network of observing stations, to discuss the prelaunch training observations which have been performed and to prepare the network for the operating phase of the alert mode which must begin in 2015. -
Astronomy 2009 Index
Astronomy Magazine 2009 Index Subject Index 1RXS J160929.1-210524 (star), 1:24 4C 60.07 (galaxy pair), 2:24 6dFGS (Six Degree Field Galaxy Survey), 8:18 21-centimeter (neutral hydrogen) tomography, 12:10 93 Minerva (asteroid), 12:18 2008 TC3 (asteroid), 1:24 2009 FH (asteroid), 7:19 A Abell 21 (Medusa Nebula), 3:70 Abell 1656 (Coma galaxy cluster), 3:8–9, 6:16 Allen Telescope Array (ATA) radio telescope, 12:10 ALMA (Atacama Large Millimeter/sub-millimeter Array), 4:21, 9:19 Alpha (α) Canis Majoris (Sirius) (star), 2:68, 10:77 Alpha (α) Orionis (star). See Betelgeuse (Alpha [α] Orionis) (star) Alpha Centauri (star), 2:78 amateur astronomy, 10:18, 11:48–53, 12:19, 56 Andromeda Galaxy (M31) merging with Milky Way, 3:51 midpoint between Milky Way Galaxy and, 1:62–63 ultraviolet images of, 12:22 Antarctic Neumayer Station III, 6:19 Anthe (moon of Saturn), 1:21 Aperture Spherical Telescope (FAST), 4:24 APEX (Atacama Pathfinder Experiment) radio telescope, 3:19 Apollo missions, 8:19 AR11005 (sunspot group), 11:79 Arches Cluster, 10:22 Ares launch system, 1:37, 3:19, 9:19 Ariane 5 rocket, 4:21 Arianespace SA, 4:21 Armstrong, Neil A., 2:20 Arp 147 (galaxy pair), 2:20 Arp 194 (galaxy group), 8:21 art, cosmology-inspired, 5:10 ASPERA (Astroparticle European Research Area), 1:26 asteroids. See also names of specific asteroids binary, 1:32–33 close approach to Earth, 6:22, 7:19 collision with Jupiter, 11:20 collisions with Earth, 1:24 composition of, 10:55 discovery of, 5:21 effect of environment on surface of, 8:22 measuring distant, 6:23 moons orbiting, -
1977Apj. . .217 . .903Y the Astrophysical Journal, 217
.903Y . .217 The Astrophysical Journal, 217:903-915, 1977 November 1 . © 1977. The American Astronomical Society. All rights reserved. Printed in U.S.A. 1977ApJ. THE LOCAL GROUP: THE SOLAR MOTION RELATIVE TO ITS CENTROID A. Yahil,* G. A. Tammann, and Allan Sandage Hale Observatories, Carnegie Institution of Washington, California Institute of Technology Received 1976 October 29; accepted 1977 April 29 ABSTRACT A new solution for the motion of the local standard of rest (LSR) relative to the centroid of the Local Group (LG) of galaxies, based on 21 cm redshifts for a number of candidates, gives i;(LSR) = 300 km s_1 toward / = 107°, b = —8°. Three other solutions are given using different precepts for membership within the LG. This motion of the LSR corresponds to a best-fit -1 o solar motion relative to the LG centroid of ^(0) = 308 km s toward / = 105°, b = —I . Consideration of the velocity residuals from the ridge-line solution of each candidate galaxy shows that the sometimes-mentioned galaxies IC 342, NGC 6946, NGC 404, and Maffei 1 and 2 are certainly not members. Likely members, on the basis of the kinematics alone, are IC 10, Pegasus dwarf, WLM, DDO 210, Leo A, and IC 5152. Possible, but unlikely, members, again based on kinematics alone, are DDO 187, GR 8, Sextans A and B, and NGC 3109. All five of these latter galaxies have positive residuals of about 125 km s-1 relative to the solution, and may be the nearest galaxies that show the cosmological expansion. A discussion of the error matrix is given, with special emphasis on breaking up the velocity v0 of the LSR relative to the centroid of the LG into the sum of a rotation velocity vc and the motion of the center of the Galaxy vG. -
Interstellarum 22 1 30 38
Liebe Leserinnen, liebe Leser, das Sternbild Skorpion gehört zu denjenigen Himmelsarealen, die von Mitteleuropa aus nur kurz zu beobachten sind. Trotzdem tummeln sich gerade hier eine große Anzahl interessanter Deep-Sky-Objekte. Neben Doppelsternen (Seite 47) und Veränderlichen (Seite 49) gehören dazu vor allem großflächige Emissions- und Reflexions- nebel. Diese bunteste Region des Himmels ist von unseren Breiten aus allerdings kaum zu erfassen und erfordert Reisen auf die Südhalbku- gel. Stefan Binnewies war in Afrika und zeigt uns auf tiefen Farbaufnahmen die Himmelswunder im nördlichen Skorpion zwischen den Zangen des Krabbeltiers (Seite 44). Die aufregenden süd- lichen, für Mitteleuropäer unter dem Horizont Ikeya Zhang (Foto: Martin Bender) befindlichen Nebellandschaften hatten wir bereits in interstellarum 16 vorgestellt. Das Team des Turtle Star Observatory um Axel Der Komet Ikeya-Zhang hat uns alle beglückt. Martin hat unter dem dunklen namibischen Him- Nach langer Pause war mit ihm endlich wieder mel fünf aktuelle Negativfilme für die Deep-Sky- ein Schweifstern aufgetaucht, der schön mit blo- Fotografie getestet (Seite 60). Dieser Test ist einer ßem Auge zu erkennen war. Aus den zahlreichen der Bestandteile des neuen Oculum-Buches Bildeinsendungen vieler Leser haben wir die »Astrofotografie in fünf Schritten«. Für jeden Ein- schönsten Abbildungen zusammengestellt (Seite steiger verständlich erklärt Axel Martin dort den 38). Im nächsten Heft werden wir noch den Aus- Weg zum erfolgreichen Astrofotografen. Neben klang der Ikeya-Zhang-Show feiern und weitere Tipps für die richtige Ausrüstung steht dabei vor Aufnahmen von Ihnen veröffentlichen. allem die praxisorientierte Problemlösung im Vordergrund. Wir möchten dieses Buch aus unse- Astrofotografie ist ungebrochen populär, gera- rem Hause jedem angehenden Astrofotografen de auch die chemische Variante. -
Astrometry of Three Near Earth Asteroids with the Lijiang 2.4 M Telescope
Research in Astron. Astrophys. Vol.xx (20xx) No.XX, 000–000 Research in http://www.raa-journal.org http://www.iop.org/journals/raa Astronomy and Astrophysics Astrometry of three near Earth asteroids with the Lijiang 2.4 m telescope Xi-Liang Zhang1;2;3, Yong Yu3, Xue-Li Wang1;2, Chuan-Jun Wang1;2, Liang Chang1;2 Yu-Feng Fan1;2 and Zheng-Hong Tang3 1 Yunnan Observatories, Chinese Academy of Sciences (CAS), P. O. Box 110, Kunming 650011, China; [email protected] 2 Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. O. Box 110, Kunming 650011, China 3 Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 20030, China Received 2014 April 10; accepted 2014 June 27 Abstract Under the framework of the observational campaigns organized by the GAIA Follow Up Network for Solar System Objects (GAIA-FUN-SSO), three near Earth asteroids of (367943) Duende, (99942) Apophis and 2013 TV135 were observed with the Lijiang 2.4 m telescope of Yunnan Observatories. The software PRISM was used to calibrate the CCD fields and measure the positions of Apophis and 2013 TV135, and our own software was used to Duende. Comparison results have shown that, the ephemerides of INPOP10a and JPL are consistent for Apophis and 2013 TV135, however quite inconsistent for Duende. Moreover, we have found that the mean values of the system errors between the ephemerides of INPOP10a and JPL are about 7200 and ¡19900 in right ascension and declination respectively for Duende, and the ephemeris JPL is reliable with the means of O ¡ C (observed-minus- calculated) residuals in right ascension and declination about 2:7200 and 1:4900. -
Astrometry of Three Near Earth Asteroids with the Lijiang 2.4 M Telescope ∗
RAA 2015 Vol. 15 No. 3, 435–442 doi: 10.1088/1674–4527/15/3/010 Research in http://www.raa-journal.org http://www.iop.org/journals/raa Astronomy and Astrophysics Astrometry of three near Earth asteroids with the Lijiang 2.4 m telescope ¤ Xi-Liang Zhang1;2;3, Yong Yu3, Xue-Li Wang1;2, Chuan-Jun Wang1;2, Liang Chang1;2 Yu-Feng Fan1;2 and Zheng-Hong Tang3 1 Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; [email protected] 2 Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3 Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 20030, China Received 2014 April 10; accepted 2014 June 27 Abstract Under the framework of observational campaigns organized by the GAIA Follow Up Network for Solar System Objects, three near Earth asteroids, 367943 Duende, 99942 Apophis and 2013 TV135, were observed with the Lijiang 2.4 m telescope administered by Yunnan Observatories. The software package PRISM was used to calibrate the CCD fields and measure the positions of 99942 Apophis and 2013 TV135, and our own software was used for 367943 Duende. A comparison of the results show that the ephemerides of INPOP10a and JPL are consistent for 99942 Apophis and 2013 TV135, however, they are quite inconsistent for 367943 Duende. Moreover, we have found that differences between the mean values in the ephemerides of INPOP10a and JPL are about 7200 and ¡19900 in right ascension and declination respectively for 367943 Duende. Moreover, the ephemeris published by JPL is reliable in terms of the mean observed-minus-calculated (O ¡ C) residuals in right ascension and declination of about 2:7200 and 1:4900 respectively. -
Bright Nebula Observing Program
Contact information: Inside this issue: Info Officer (General Info) – [email protected] Website Administrator – [email protected] Page January Club Calendar 3 Postal Address: Fort Worth Astronomical Society Tandy Hills Star Party Info 4 c/o Matt McCullar Cloudy Nights Review 5.,6 5801 Trail Lake Drive Fort Worth, TX 76133 Celestial Events 7 Web Site: http://www.fortworthastro.org (or .com) Object of the Month 8 Facebook: http://tinyurl.com/3eutb22 Twitter: http://twitter.com/ftwastro AL Observing Program 9,10,11,12 Yahoo! eGroup (members only): http://tinyurl.com/7qu5vkn ISS visibility info 13 Officers (2018-2020): Planetary Visibility info 13 President – Chris Mlodnicki , [email protected] Vice President – Fred Klich , [email protected] Sky Chart for Month 14 Tres – Laura Cowles, [email protected] Lunar Calendar 15 Secretary—Pam Klich, [email protected] Lunar Info 16 Board Members: Mars/Saturn Data 17 2018-2020 Phil Stage Fundraising/Donation Info 18,19 Robin Pond Photo Files 20 John McCrea Pam Kloepfer Cover Photo: IC1848 Photo via Alberto Pisabarro Observing Site Reminders: Be careful with fire, mind all local burn bans! Dark Site Usage Requirements (ALL MEMBERS): • Maintain Dark-Sky Etiquette (http://tinyurl.com/75hjajy) • Turn out your headlights at the gate! Ed itor : • Sign the logbook (in camo-painted storage shed. Inside the door on the left- hand side) George C. Lutch • Log club equipment problems (please contact a FWAS board member to inform them of any problems) • Put equipment back neatly when finished Issue Contribu- • Last person out: to rs : Check all doors – secured, but NOT locked Make sure nothing is left out Pa m K l ic h The Fort Worth Astronomical Society (FWAS) was founded in 1949 and is a non-profit 501(c)3 Matt McCullar scientific educational organization, and incorporated in the state of Texas.