DOCSLIB.ORG

The University of Wisconsin-Madison Department of Astronomy Madison, WI 53706

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The University of Wisconsin-Madison Department of Astronomy Madison, WI 53706 The University of Wisconsin-Madison Department of Astronomy Madison, WI 53706 This description covers the Department’s activ- was at Lick Observatory (Santa Cruz) and is inter- ities from October 1, 2003, through September 30, ested in instrumentation and the nature of QSOs. 2004. It only refers to papers that were published Prof. Christopher Anderson retired at the end of the within this period. It ignores research that is under spring semester and was appointed Emeritus Pro- way and papers that are in press or submitted. fessor. Linda Sparke completed three years’ duty Gallagher will assume full editorship of the As- as Chair and was replaced in that capacity by John tronomical Journal on 1 January 2005, following Hoessel. Barger and Lazarian were promoted to his selection in May. Associate Professor. The faculty consist of Pro- The Southern African Large Telescope (SALT) fessors Cassinelli, Churchwell, Gallagher, Hoes- will undergo engineering tests in 2005. Its Prime sel (Chair), Mathieu, Nordsieck, Reynolds, Savage, Focus Imaging Spectrograph (Nordsieck, PI; Burgh, Sparke, Zweibel, and Associate Professors Barger, scientist) will be shipped to South Africa in early Bershady, Lazarian, and Wilcots. Bless and Mathis 2005. The Spitzer Space Telescope Legacy Sci- are Professors Emeriti residing in Madison. Robert ence project GLIMPSE, a near-infrared imaging Benjamin is an Assistant Professor of Physics at survey of the inner Galactic plane (Churchwell, PI), UW-Whitewater and served in Madison as Pro- is producing excellent scientific results. Other ma- gram Director of the Summer Research Opportu- jor thrusts include studies of star formation, extra- nities Program. Percival is a Scientist; Wakker, an galactic structure and evolution, properties of inter- Associate Scientist. Burgh, Haffner, Ignace, and stellar and intergalactic gas, and studies of magne- Lehner were Assistant Scientists. tized turbulence. Kelsey Johnson went to the Univ. of Vir- WIYN refers to the Wisconsin-Indiana-Yale- ginia as an Assistant Professor. D. Harbeck went NOAO 3.5-m telescope on Kitt Peak. WHAM to UC-Berkeley as a Charles Townes Fellow, and refers to the Wisconsin H-Alpha Mapper, a sen- R. Indebetouw is at U. Virginia as a postdoctoral sitive Fabry-Perot spectrometer operating on Kitt researcher. R. Ignace joined the faculty at East Peak. FUSE denotes the Far-Ultraviolet Spectro- Tennessee State University. K. Stassun left for a scopic Explorer, a satellite that provides spectra faculty job at Vanderbilt University. B. Pichardo from 90 nm to 120 nm. HST is the Hubble Space moved to a postdoctoral research position at U. Telescope. Kentucky W. Harris left for a faculty job in the De- The description of research that follows em- partment of Earth and Space Sciences at U. Wash- phasizes the contribution of UW personnel, but in ington. Orio is a Visiting Associate Scientist. J. almost every case there are several authors from Marche´ served as Lecturer. outside that have contributed in various amounts, Prof. Ron Reynolds received the Beatrice M. often taking the lead in the project being described. Tinsley Award of the American Astronomical So- Space and style do not permit a complete list of col- ciety, given on a worldwide basis every two years leagues and collaborators for each project. The list for research of and exceptionally creative or inno- of papers at the end of the report lists authors in the vative character. Amy Barger received the David correct order in the published paper. and Lucile Packard Fellowship for Science and En- gineering. 1 Personnel Cassinelli was honored at a workshop entitled Dr. Andrew Sheinis accepted a position as “Massive Stars: From Photospheres to V-infinity”. Assistant Professor, to begin in Fall, 2005. He Barger edited a book “Supermassive Black Holes in 1 the Distant Universe”, published by Kluwer Aca- nal Hα during the 1997 - 2001 solar cycle. It is demic Press in its Astrophysics and Space Science about 45% higher at solar maximum than at mini- Library series. mum. Bershady continues to serve as the Board Di- Gallagher began work on a program with W. rector of SALT, with Nordsieck as the Science Harris (U. Washington) to search for comets around Working Group representative. Wilcots and Sparke a young star using FUSE to detect UV line absorp- are on the WIYN Board of Directors. Barger is tion associated with cometary gas. on the WIYN Science Advisory Committee. Math- ieu continued as Director of the NSF Center for 3 Stars and Novae the Integration of Research, Teaching, and Learn- Cassinelli showed that the long-standing prob- ing. Reynolds served as Interim Director of the lem of supplying enough momentum to the strong Space Astronomy Lab. Wilcots served as Wiscon- winds of Wolf-Rayet stars is not solved by assum- sin’s representative to the U.S. Square Kilometer ing optically thick clumps. The rate of mass loss Array Consortium and as a member of the Inter- is reduced, but the amount of momentum extracted national Science Advisory Committee of the SKA by scattering the stellar radiation is reduced. He radio telescope project. and others took into account the variations of mass A. Fox received a University Teaching Assis- loss rate with latitude for the magnetically torqued tant award. N. Homeier, now at Johns Hopkins disk model for hot star disks. He and Ignace used University, presented a PhD thesis, “Behind Closed the infrared free-free continuum of the Wolf-Rayet Curtains: The Hidden Population Of Massive Stars WR 136, plus the widths of several He II emission In The Milky Way”, supervised by J. Gallagher. G. lines, to determine that the amount of clumping is Madsen’s PhD thesis (Reynolds, supervisor) was small in the outer parts of the wind. “An Exploration of the Heterogeneous Nature of Cassinelli, Reynolds, and colleagues used the the Warm Ionized Medium”. He continued at UW- Chandra X-ray satellite to observe the emission Madison but has accepted a 2-yr NSF Mathemat- lines in τ Sco and Spica (α Vir) from ions such as ical and Physical Sciences “Distinguished Inter- Ne IX and O VII. The lines of both are rather nar- national Postdoctoral Research Fellowship” at the row rather than being Doppler broadened by the ex- Anglo-Australian Observatory, to begin in January pansion of the stellar wind. The spectra suggest a 2005. A. Steffen presented his thesis “A Wide Field production by shocks caused by instabilities in the Chandra Survey of the Lockman Hole” (Barger, winds. supervisor) and is now a postdoctoral fellow at A team including Gallagher found a linear re- Penn State. C. Watson presented his thesis “Hot lation between the equivalent width of the Ca II Cores and Entrainment in Massive, Bipolar Out- triplet absorption lines and [Fe/H] in red giants. flows” (Churchwell, supervisor) and is an Assistant No age effect is observed. The [Fe/H] = −0.56 Professor of Physics at Manchester College in In- for Trumpler 5, lower than about 0.3 dex from the diana. color-magnitude diagram. The method is applica- ble to red giants in Local Group galaxies. 2 The Solar System Ignace, Nordsieck, and Cassinelli studied the Anderson contributed to a kinetic model of the Hanle effect that involves the polarization of reso- comae of comets. It examines the chemistry of nance line radiation scattered by atoms aligned by OH, O I(3P) and O I(1D) in detail, and the role of a circumstellar a magnetic field. The effect diag- these species in the destruction of CO and other noses the field in the outer parts of typical hot star molecules. winds. For high surface fields, both the Hanle and Reynolds, Madsen, and colleagues determined Zeeman effects can be used. the kinematics of zodiacal dust by observing Mg I Lazarian considered the superluminal ejections λ5184 with WHAM. The orbits are eccentric and in microquasars (binary stars with a compact mem- have a broad distribution of orbital planes. WHAM ber and a relativistic jet) that might be caused by was used to monitor variations in the solar geocoro- violent magnetic reconnection events during super- 2 critical disk mass accretion. Accreting stars show harder x-ray spectra but are Tidal circularization of binary systems has been not more luminous than the non-accreting objects, a major thrust in Mathieu’s research. He and stu- possibly because of attenuation by the circumstel- dents determined that the period of spectroscopic lar gas. The X-rays arise from the chromospheres, binaries below which the orbits are circularized in not from accretion. the old Galactic cluster NGC 188 is longer than Zweibel considered magnetic field evolution in in younger clusters. Contrary to theory, tidal cir- neutron star crusts due to the Hall effect (dominant cularization is more effective in solar-type main- in isolated objects) and ohmic decay (dominant for sequence binaries for times longer than 1 Gyr than accreting objects). The team gives expressions for currently predicted by tidal models. The team also the evolution of the field, both internal and external considered M35 and NGC 6819. Mathieu worked to the star, with several examples. on precision astrometry from old plates of the open Orio used FUSE and HST to observe the spec- cluster NGC 188, using recent CCD Mosaic Imager trum of the dwarf nova EY Cyg during quiescence. frames to calibrate the optical distortions for var- The best models have a temperature of 22 kK, ious telescopes and field correctors. The method log(g) = 9, and an accretion belt with T = 36 kK. provided a new catalog of proper motions and po- Photometry of the polar V1062 Tau showed two sitions for stars in the cluster. He used K-band periods (orbital and spin), plus their beat period.
Load more

Recommended publications
  • Durham E-Theses
    Durham E-Theses First visibility of the lunar crescent and other problems in historical astronomy. Fatoohi, Louay J. How to cite: Fatoohi, Louay J. (1998) First visibility of the lunar crescent and other problems in historical astronomy., Durham theses, Durham University. Available at Durham E-Theses Online: http://etheses.dur.ac.uk/996/ Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in Durham E-Theses • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full Durham E-Theses policy for further details. Academic Support Oce, Durham University, University Oce, Old Elvet, Durham DH1 3HP e-mail: [email protected] Tel: +44 0191 334 6107 http://etheses.dur.ac.uk me91 In the name of Allah, the Gracious, the Merciful >° 9 43'' 0' eji e' e e> igo4 U61 J CO J: lic 6..ý v Lo ý , ý.,, "ý J ýs ýºý. ur ý,r11 Lýi is' ý9r ZU LZJE rju No disaster can befall on the earth or in your souls but it is in a book before We bring it into being; that is easy for Allah. In order that you may not grieve for what has escaped you, nor be exultant at what He has given you; and Allah does not love any prideful boaster.
    [Show full text]
  • Publications for Geraint Lewis 2021 2020
    Publications for Geraint Lewis 2021 R., Horner, J., Wright, D., Carter, B., Morton, T., Spina, L., Li, T., Koposov, S., Erkal, D., Ji, A., Shipp, N., Hilmi, T., Bland-Hawthorn, J., Hayden, M., Lewis, G., Sharma, S., Kuehn, K., Pace, A., Lewis, G., Mackey, D., Wan, Z., Bland- Simpson, J., et al (2021). The GALAH Survey: Using galactic Hawthorn, J., Sharma, S., et al (2021). Broken into pieces: archaeology to refine our knowledge of TESS target stars. ATLAS and Aliqa Uma as one single stream. The Astrophysical Monthly Notices of the Royal Astronomical Society, 504(4), Journal, 911(2), 149. <a href="http://dx.doi.org/10.3847/1538- 4968-4989. <a 4357/abeb18">[More Information]</a> href="http://dx.doi.org/10.1093/mnras/stab1052">[More Information]</a> Sharma, S., Hayden, M., Bland-Hawthorn, J., Stello, D., Buder, S., Zinn, J., Kallinger, T., Asplund, M., De Silva, G., D'Orazi, Oliver, W., Elahi, P., Lewis, G., Power, C. (2021). The V., Kos, J., Lewis, G., Lin, J., Zucker, D., Chen, B., Huber, D., hierarchical structure of galactic haloes: Classification and Kafle, P., Khanna, S., et al (2021). Fundamental relations for characterization with halo-optics. Monthly Notices of the Royal the velocity dispersion of stars in the Milky Way. Monthly Astronomical Society, 501(3), 4420-4437. <a Notices of the Royal Astronomical Society, 506(2), 1761-1776. href="http://dx.doi.org/10.1093/mnras/staa3879">[More <a href="http://dx.doi.org/10.1093/mnras/stab1086">[More Information]</a> Information]</a> Arentsen, A., Starkenburg, E., Aguado, D., Martin, N., Placco, Wiseman, P., Sullivan, M., Smith, M., Frohmaier, C., Vincenzi, V., Carlberg, R., Gonz�lez Hern�ndez, J., Hill, V., M., Graur, O., Popovic, B., Armstrong, P., Brout, D., Davis, T., Jablonka, P., Kordopatis, G., Lewis, G., Wan, Z., et al (2021).
    [Show full text]
  • Fy10 Budget by Program
    AURA/NOAO FISCAL YEAR ANNUAL REPORT FY 2010 Revised Submitted to the National Science Foundation March 16, 2011 This image, aimed toward the southern celestial pole atop the CTIO Blanco 4-m telescope, shows the Large and Small Magellanic Clouds, the Milky Way (Carinae Region) and the Coal Sack (dark area, close to the Southern Crux). The 33 “written” on the Schmidt Telescope dome using a green laser pointer during the two-minute exposure commemorates the rescue effort of 33 miners trapped for 69 days almost 700 m underground in the San Jose mine in northern Chile. The image was taken while the rescue was in progress on 13 October 2010, at 3:30 am Chilean Daylight Saving time. Image Credit: Arturo Gomez/CTIO/NOAO/AURA/NSF National Optical Astronomy Observatory Fiscal Year Annual Report for FY 2010 Revised (October 1, 2009 – September 30, 2010) Submitted to the National Science Foundation Pursuant to Cooperative Support Agreement No. AST-0950945 March 16, 2011 Table of Contents MISSION SYNOPSIS ............................................................................................................ IV 1 EXECUTIVE SUMMARY ................................................................................................ 1 2 NOAO ACCOMPLISHMENTS ....................................................................................... 2 2.1 Achievements ..................................................................................................... 2 2.2 Status of Vision and Goals ................................................................................
    [Show full text]
  • INAUGURAL – DISSERTATION Dipl.-Phys. Alexander A. Schegerer
    INAUGURAL – DISSERTATION zur Erlangung der Doktorwurde¨ der Naturwissenschaftlich-Mathematischen Gesamtfakult¨at der Ruprecht - Karls - Universit¨at Heidelberg vorgelegt von Dipl.-Phys. Alexander A. Schegerer, geboren in Kaufbeuren Tag der mundlichen¨ Prufung:¨ 17. Oktober 2007 II Struktur- und Staubentwicklung in zirkumstellaren Scheiben um T Tauri-Sterne Analyse und Modellierung hochaufl¨osender Beobachtungen in verschiedenen Wellenl¨angenbereichen Gutachter: Prof. Dr. Thomas Henning Prof. Dr. Wolfgang Duschl IV Meinen Eltern, Maria-Christa und Wolfgang Schegerer, gewidmet. VI Thema Im Zentrum dieser Doktorarbeit steht die Untersuchung der inneren Strukturen zirkumstella- rer Scheiben um T Tauri-Sterne sowie die Analyse zirkumstellarer Staub- und Eisteilchen und ihres Einflusses auf die Scheibenstruktur. Unter Zuhilfenahme von theoretisch berechneten Vergleichsspektren gibt der Verlauf der 10 µm-Emissionsbande in den Spektren junger stellarer Objekte Hinweise auf den Entwick- lungsgrad von Silikatstaub. Die Silikatbanden von 27 T Tauri-Objekten werden analysiert, um nach potentiell vorliegenden Korrelationen zwischen der Silikatstaubzusammensetzung und den stellaren Eigenschaften zu suchen. Analog erlaubt das Absorptionsband bei 3 µm, das dem Wassereis zugeschrieben wird, eine Untersuchung der Entwicklung von Eisk¨ornern in jungen stellaren Objekten. Erstmals ist es gelungen, kristallines Wassereis im Spektrum eines T Tauri-Objektes nachzuweisen. Unser wichtigstes Hilfsmittel zur Analyse der Temperatur- und Dichtestrukturen zirkum- stellarer
    [Show full text]
  • Instrumental Methods for Professional and Amateur
    Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy Olivier Mousis, Ricardo Hueso, Jean-Philippe Beaulieu, Sylvain Bouley, Benoît Carry, Francois Colas, Alain Klotz, Christophe Pellier, Jean-Marc Petit, Philippe Rousselot, et al. To cite this version: Olivier Mousis, Ricardo Hueso, Jean-Philippe Beaulieu, Sylvain Bouley, Benoît Carry, et al.. Instru- mental Methods for Professional and Amateur Collaborations in Planetary Astronomy. Experimental Astronomy, Springer Link, 2014, 38 (1-2), pp.91-191. 10.1007/s10686-014-9379-0. hal-00833466 HAL Id: hal-00833466 https://hal.archives-ouvertes.fr/hal-00833466 Submitted on 3 Jun 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy O. Mousis, R. Hueso, J.-P. Beaulieu, S. Bouley, B. Carry, F. Colas, A. Klotz, C. Pellier, J.-M. Petit, P. Rousselot, M. Ali-Dib, W. Beisker, M. Birlan, C. Buil, A. Delsanti, E. Frappa, H. B. Hammel, A.-C. Levasseur-Regourd, G. S. Orton, A. Sanchez-Lavega,´ A. Santerne, P. Tanga, J. Vaubaillon, B. Zanda, D. Baratoux, T. Bohm,¨ V. Boudon, A. Bouquet, L. Buzzi, J.-L. Dauvergne, A.
    [Show full text]
  • Una Aproximación Física Al Universo Local De Nebadon
    4 1 0 2 local Nebadon de Santiago RodríguezSantiago Hernández Una aproximación física al universo (160.1) 14:5.11 La curiosidad — el espíritu de investigación, el estímulo del descubrimiento, el impulso a la exploración — forma parte de la dotación innata y divina de las criaturas evolutivas del espacio. Tabla de contenido 1.-Descripción científica de nuestro entorno cósmico. ............................................................................. 3 1.1 Lo que nuestros ojos ven. ................................................................................................................ 3 1.2 Lo que la ciencia establece ............................................................................................................... 4 2.-Descripción del LU de nuestro entorno cósmico. ................................................................................ 10 2.1 Universo Maestro ........................................................................................................................... 10 2.2 Gran Universo. Nivel Espacial Superunivesal ................................................................................. 13 2.3 Orvonton. El Séptimo Superuniverso. ............................................................................................ 14 2.4 En el interior de Orvonton. En la Vía Láctea. ................................................................................. 18 2.5 En el interior de Orvonton. Splandon el 5º Sector Mayor ............................................................ 19
    [Show full text]
  • School of Physics Publications 2007
    School of Physics Publications 2007 Books Karnutsch, C 2007, Low threshold organic thin-film laser devices, Göttingen, 1 Ostrikov, K, Xu, S 2007, Plasma-Aided Nanofabrication: From Plasma Sources to Nanoassembly, Weinheim, Germany Book Chapters Beck, R, Gaensler, B M, Feretti, L 2007, SKA and the Magnetic Universe, Exploring the Cosmic Frontier: Astrophysical Instruments for the 21st Century, Springer-Verlag Berlin Heidelberg, Berlin Heidelberg, 103-108 Bilek, M, Powles, R C, McKenzie, D R 2007, Treatment of polymeric biomaterials by ion implantation, Biomaterials and Surface Modification, Research Signpost, India, 205-248 Britton, S C, New, P B, Roberts, A L, Sharma, M D 2007, Investigating students' ability totransfer mathematics, Transforming a university: the scholarship of teaching and learning in practice, University of Sydney Press, NSW, Australia, 127-140 Dey, C J, Berger, C, Foran, B, Foran, M, Joske, R, Lenzen, M, Wood, R J 2007, Household environmental pressure from consumption: an Australian environmental atlas, Water Wind Art and Debate -How environmental concerns impacton disciplinary research, Sydney University Press, Sydney, 1, 280-314 Eggleton, B J, Slusher, R 2007, Nonlinear pulse propagation in one-dimensional photonic bandgap structures, Nonlinear photonic bandgap materials, Springer Khoukhi, M, Maruyama, S, Bosi, S G, Komiya, A 2007, A Simple Approach for Calculating the Optical Constants of a Clear Glass Window from 0.19 to 5 um, Recent Developments in Solar Energy, Nova Science Publishers, Inc, New York, 289-297
    [Show full text]
  • The Hubble Catalog of Variables (HCV)? A
    Astronomy & Astrophysics manuscript no. hcv c ESO 2019 September 25, 2019 The Hubble Catalog of Variables (HCV)? A. Z. Bonanos1, M. Yang1, K. V. Sokolovsky1; 2; 3, P. Gavras4; 1, D. Hatzidimitriou1; 5, I. Bellas-Velidis1, G. Kakaletris6, D. J. Lennon7; 8, A. Nota9, R. L. White9, B. C. Whitmore9, K. A. Anastasiou5, M. Arévalo4, C. Arviset8, D. Baines10, T. Budavari11, V. Charmandaris12; 13; 1, C. Chatzichristodoulou5, E. Dimas5, J. Durán4, I. Georgantopoulos1, A. Karampelas14; 1, N. Laskaris15; 6, S. Lianou1, A. Livanis5, S. Lubow9, G. Manouras5, M. I. Moretti16; 1, E. Paraskeva1; 5, E. Pouliasis1; 5, A. Rest9; 11, J. Salgado10, P. Sonnentrucker9, Z. T. Spetsieri1; 5, P. Taylor9, and K. Tsinganos5; 1 1 IAASARS, National Observatory of Athens, Penteli 15236, Greece e-mail: [email protected] 2 Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA 3 Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, 119992 Moscow, Russia 4 RHEA Group for ESA-ESAC, Villanueva de la Cañada, 28692 Madrid, Spain 5 Department of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos 15784, Greece 6 Athena Research and Innovation Center, Marousi 15125, Greece 7 Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain 8 ESA, European Space Astronomy Centre, Villanueva de la Canada, 28692 Madrid, Spain 9 Space Telescope Science Institute, Baltimore, MD 21218, USA 10 Quasar Science Resources for ESA-ESAC, Villanueva de la Cañada, 28692 Madrid, Spain 11 The Johns Hopkins University, Baltimore, MD 21218, USA 12 Institute of Astrophysics, FORTH, Heraklion 71110, Greece 13 Department of Physics, Univ.
    [Show full text]
  • Pulsating Components in Binary and Multiple Stellar Systems---A
    Research in Astron. & Astrophys. Vol.15 (2015) No.?, 000–000 (Last modified: — December 6, 2014; 10:26 ) Research in Astronomy and Astrophysics Pulsating Components in Binary and Multiple Stellar Systems — A Catalog of Oscillating Binaries ∗ A.-Y. Zhou National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; [email protected] Abstract We present an up-to-date catalog of pulsating binaries, i.e. the binary and multiple stellar systems containing pulsating components, along with a statistics on them. Compared to the earlier compilation by Soydugan et al.(2006a) of 25 δ Scuti-type ‘oscillating Algol-type eclipsing binaries’ (oEA), the recent col- lection of 74 oEA by Liakos et al.(2012), and the collection of Cepheids in binaries by Szabados (2003a), the numbers and types of pulsating variables in binaries are now extended. The total numbers of pulsating binary/multiple stellar systems have increased to be 515 as of 2014 October 26, among which 262+ are oscillating eclipsing binaries and the oEA containing δ Scuti componentsare updated to be 96. The catalog is intended to be a collection of various pulsating binary stars across the Hertzsprung-Russell diagram. We reviewed the open questions, advances and prospects connecting pulsation/oscillation and binarity. The observational implication of binary systems with pulsating components, to stellar evolution theories is also addressed. In addition, we have searched the Simbad database for candidate pulsating binaries. As a result, 322 candidates were extracted. Furthermore, a brief statistics on Algol-type eclipsing binaries (EA) based on the existing catalogs is given. We got 5315 EA, of which there are 904 EA with spectral types A and F.
    [Show full text]
  • Extragalactic Astronomy
    Astrophysics and Space Science Library 435 Mauro D’Onofrio Roberto Rampazzo Simone Zaggia Editors From the Realm of the Nebulae to Populations of Galaxies Dialogues on a Century of Research From the Realm of the Nebulae to Populations of Galaxies Astrophysics and Space Science Library EDITORIAL BOARD Chairman W. B. BURTON, National Radio Astronomy Observatory, Charlottesville, Virginia, U.S.A. ([email protected]); University of Leiden, The Netherlands ([email protected]) F. BERTOLA, University of Padua, Italy C. J. CESARSKY, Commission for Atomic Energy, Saclay, France P. EHRENFREUND, Leiden University, The Netherlands O. ENGVOLD, University of Oslo, Norway A. HECK, Strasbourg Astronomical Observatory, France E. P. J. VAN DEN HEUVEL, University of Amsterdam, The Netherlands V. M. KASPI, McGill University, Montreal, Canada J. M. E. KUIJPERS, University of Nijmegen, The Netherlands H. VAN DER LAAN, University of Utrecht, The Netherlands P. G. MURDIN, Institute of Astronomy, Cambridge, UK B. V. SO M OV, Astronomical Institute, Moscow State University, Russia R. A. SUNYAEV, Space Research Institute, Moscow, Russia More information about this series at http://www.springer.com/series/5664 Mauro D’Onofrio • Roberto Rampazzo • Simone Zaggia Editors From the Realm of the Nebulae to Populations of Galaxies Dialogues on a Century of Research 123 Editors Mauro D’Onofrio Roberto Rampazzo Department of Physics and Astronomy INAF–Osservatorio Astronomico University of Padova di Padova Italy Padova, Italy Simone Zaggia INAF–Osservatorio Astronomico di Padova Padova, Italy ISSN 0067-0057 ISSN 2214-7985 (electronic) Astrophysics and Space Science Library ISBN 978-3-319-31004-6 ISBN 978-3-319-31006-0 (eBook) DOI 10.1007/978-3-319-31006-0 Library of Congress Control Number: 2016946611 © Springer International Publishing Switzerland 2016 This work is subject to copyright.
    [Show full text]
  • Biennial Report 2006 2007 Published in Spain by the Isaac Newton Group of Telescopes (ING) ISSN 1575–8966 Legal License: TF–1142 /99
    I SAAC N EWTON G ROUP OF T ELESCOPES Biennial Report 2006 2007 Published in Spain by the Isaac Newton Group of Telescopes (ING) ISSN 1575–8966 Legal license: TF–1142 /99 Apartado de correos, 321 E-38700 Santa Cruz de La Palma; Canary Islands; Spain Tel: +34 922 425 400 Fax: +34 922 425 401 URL: http://www.ing.iac.es/ Editor and designer: Javier Méndez ([email protected]) Printing: Gráficas Sabater. Tel: +34 922 623 555 Front cover: The Milky Way from the site of the William Herschel Telescope. Credit: Nik Szymanek. Inset: Photograph of the WHT at sunset. Credit: Nik Szymanek. Other picture credits: Nik Szymanek (WHT, p. 4; INT, p. 4; JKT, p. 4; ING, p. 5); Jens Moser (WHT, back; INT, back); Nik Szymanek (JKT, back). The ING Biennial Report is available online at http://www.ing.iac.es/PR/AR/. ISAAC NEWTON GROUP OF TELESCOPES Biennial Report of the STFC-NWO-IAC ING Board 2006 – 2007 ISAAC NEWTON GROUP William Herschel Telescope Isaac Newton Telescope Jacobus Kapteyn Telescope 4 • ING BIENNIAL R EPORT 2006–2007 OF TELESCOPES The Isaac Newton Group of Telescopes (ING) consists of the 4.2- metre William Herschel Telescope (WHT), the 2.5-metre Isaac Newton Telescope (INT) and the 1.0-metre Jacobus Kapteyn Telescope (JKT). The ING is located 2350 metres above sea level at the Observatorio del Roque de los Muchachos (ORM) on the island of La Palma, Canary Islands, Spain. The WHT is the largest telescope of its kind in Western Europe. The construction, operation, and development of the ING telescopes are the result of a collaboration between the United Kingdom, The Netherlands and Spain.
    [Show full text]
  • Re-Examination of Globally Flat Space-Time
    1 Recent further research regarding the theory of inertial centers (unpublished) 1, Michael R. Feldman ∗ 1 Michael R. Feldman Private researcher, New York, NY, United States of America E-mail: [email protected] ∗ Geodesic solutions Our geodesic equation is given by (see (72) of [1]) 0= U a U b ∇a To find solutions, we start by expressing this equation in terms of Minkowski coordinates (T,X,Y,Z), where the spatial coordinate origin of this system is located at the position of our inertial center (i.e. r = 0 (X,Y,Z) = (0, 0, 0)). Since our metric in terms of this Minkowski coordinate parametrization takes the→ form dχ2 = c2dT 2 + dX2 − − i i X 1 2 3 where i = 1, 2, 3 and X = X,X = Y,X = Z, our metric components in Minkowski coordinates gµν c are all constants. Thus, our affine connection tensor for Minkowski coordinates is zero: Γab Minkowski = 0. Our equations of motion in Minkowski coordinates are then found to be | d2T d2Xi = 0 and = 0 (1) dσ2 dσ2 where σ χ = √Λ r(τ)dτ for massive geodesics in the theory of inertial centers (see the introduction or equation→ (57) of [1]).· Examining only our spatial components, we see that R d2Xi d dT dXi 0= = dσ2 dσ dσ dT d2T dXi dT 2 d2Xi = + dσ2 dT dσ dT 2 which leads us to d2Xi =0 (2) dT 2 where we have used the equation of motion for our Minkowski time coordinate T . The solutions to (2) are of the form i i i arXiv:1312.1182v2 [physics.gen-ph] 3 Jan 2014 X (T )= v T + X0 (3) i where X0 is our spatial Minkowski coordinate location when T = 0.
    [Show full text]