DOCSLIB.ORG

ATNF News Issue No

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
ATNF News Issue No -70°11’38” -70°11’38” -40” -40” -42” -42” Declination (J2000) Declinationa (Ja2000) -44” -44” h m s s s 11h33m26.0s 25.5s 25.0s 11 33 26.0 25.5 25.0 Right Ascension (J2000) Right Ascension (J2000) ATNF News Issue No. 68, April 2010 ISSN 1323-6326 CSIRO Astronomy and Space Science – undertaking world leading astronomical research and operator of the Australia Telescope National Facility. An artist’s impression of the new DSS35, 34-metre Beam Wave Guide antenna to be constructed at the Canberra Deep Space Communications Complex, Tidbinbilla. Credit: CDSCC/NASA Assembly of the first ASKAP antenna at the Murchison Radio-astronomy Observatory made rapid progress in January 2010. Credit: Carole Jackson, CSIRO. Cover page images See article on page 24: Resolving Structure in the HD100546 Disk—Signatures of Planet Building? Figure 3a: HD100546 map at 94500 MHz with natural cleaning, observed with the 750A array in May 2008 with 500 minutes integration on source. The extension to the west is coincident with the HST/ACS “structure 2” of Ardila et al. (2007). Figure 3b: HD100546 map at 94500 MHz with natural cleaning, observed with the 1.5B array in June 2008 with 125 minutes integration on source. The beam size is 1.6 x 0.3” (P.A. 58.2°), with a resolution of about 30 AU (FWHM) along the disk major axis. 2 ATNF News, Issue 68, April 2010 Contents Editorial.....................................................................................................................................................................................................................................3 From the Chief of CSIRO Astronomy and Space Science .........................................................................................................................4 New Chief of CSIRO Astronomy and Space Science Appointed ..........................................................................................................5 CDSCC Joins CASS ..........................................................................................................................................................................................................6 John O’Sullivan Awarded Top Science Award ....................................................................................................................................................7 Highlighting our History: The World’s First Solar Radiospectrograph—Penrith 1948–1949 ..................................................8 Australian Square Kilometre Array Pathfinder (ASKAP) ..........................................................................................................................12 Technologies for Radio Astronomy .......................................................................................................................................................................16 CSIRO Parkes Observatory wins Australia Day Award............................................................................................................................17 Education and Outreach .............................................................................................................................................................................................18 ATNF Graduate Student Program ........................................................................................................................................................................19 Distinguished Visitors .....................................................................................................................................................................................................19 Discovery of Large-scale Gravitational Infall in a Massive Protostellar Cluster ............................................................................20 Resolving Structure in the HD100546 Disk—Signatures of Planet Building? ...............................................................................24 Time Assignment Information ..................................................................................................................................................................................26 National Facility Operations Report ....................................................................................................................................................................28 The ANDS ATNF Data Management Project: Establishing a new archive for pulsar astronomy data ..............................30 Publications List .................................................................................................................................................................................................................31 Editorial Welcome to the April issue of the University of Manchester in Prime Minister’s Prize for Science; ATNF News for 2010. The observant the United Kingdom, he will begin we report on the Canberra Deep amongst you will have noticed some his new role on 1 June 2010. We Space Communications Complex minor changes to the magazine provide a brief profile on Philip (CDSCC) as it formally transitions including its cover. These reflect the Diamond and his career to date. into CASS; we feature a paper by recent structural changes within Ronald Stewart and collaborators, On a science front, we feature CSIRO and the creation of our Highlighting Our History: The World’s several articles highlighting the great new Division—CSIRO Astronomy First Solar Radiospectrograph; and we research that is being undertaken at and Space Science (or CASS report on the Parkes Observatory ATNF observatories. Sarah Maddison as its becoming known). CASS as it wins an Australia Day Award. and collaborators report on a multi- has responsibility for operating frequency observing program of the As always, we provide our regular the Australia Telescope National enigmatic Herbig Be star HD100546, update on the Australian Square Facility, as well as for other space with the Australia Telescope Kilometre Array (ASKAP) and Square tracking and space science activities Compact Array (ATCA); and Peter Kilometre Array (SKA) activity with (most notably the management Barnes and collaborators report some notable milestones achieved! of the Canberra Deep Space on the identification of a young Communications Complex). If you would like to contribute to massive star-forming cloud as it later editions of the ATNF News, As part of this restructure, a new undergoes a large-scale gravitational please contact the newsletter team. Chief of CSIRO Astronomy and collapse, utilising observations Space Science has been recently made with the Mopra telescope. Tony Crawshaw and appointed—Dr Philip Diamond. Joanne Houldsworth In other news, we talk to John Previously Director of the Jodrell The ATNF Newsletter Production Team O’Sullivan, winner of the 2009 Bank Centre for Astrophysics at ([email protected]) 3 From the Chief of CSIRO Astronomy and Space Science Lewis Ball Acting Chief, CASS This newsletter marks a Raytheon Australia, accepted offers It is remarkable that this Division watershed for radio astronomy of employment from CSIRO. is now home to Visitor Centres that host more than 200,000 This has created a very exciting and space science in CSIRO. Since members of the public each year, a and dynamic environment as staff tremendous point of interaction with the last newsletter the division from CDSCC and ATNF have the Australian public. Events such has changed its name (From started to build relationships and as the Parkes Open Days provide understanding of the much broader ATNF to CASS), has more-or- a specific focus on such activities, range of people, activities, skills, and but the ongoing dedication of our less doubled in size (from around opportunities that now sit within communications and education staff 180 staff to 300 staff, and from the new Division. In February, at who are actively engaging the public the height of the transition from an annual budget of around all year are fundamentally important. Raytheon, CDSCC achieved We play a significant role in inspiring $25M to one of $50M), and has its highest ever performance in future generations in the fact that successful data capture at 99.996%, broadened its remit considerably. Australia and Australian's have a and for the first time in 40 years did leading role to play in answering The Division's new Chief, Phil not generate a single Discrepancy some of the biggest questions about Diamond, will join CSIRO soon Report. This is an outstanding our Universe, and developing some testament to the professionalism and after this newsletter is published of the technology and prompting dedication of all the people involved. and by the time of the next innovations that can change the lives Other exciting topics detailed in newsletter Phil will be starting to of millions of people as has resulted this newsletter include some of from the wireless LAN developments set the new course for CASS. the history of the Division and its featured in the article about roots in studies of our Sun, and John O'Sullivan's well-deserved The change of name of the Division, some outstanding science results Prime Minister's Science Prize. from the Australia Telescope National from the Mopra telescope and I'd like to make special mention of Facility to CSIRO Astronomy from the Compact Array now a new arrival to CASS, Dr Douglas and Space Science occurred equipped with the amazingly capable Bock, who joined the management on 1 December 2009, bringing Compact Array
Load more

Recommended publications
  • Stars and Their Spectra: an Introduction to the Spectral Sequence Second Edition James B
    Cambridge University Press 978-0-521-89954-3 - Stars and Their Spectra: An Introduction to the Spectral Sequence Second Edition James B. Kaler Index More information Star index Stars are arranged by the Latin genitive of their constellation of residence, with other star names interspersed alphabetically. Within a constellation, Bayer Greek letters are given first, followed by Roman letters, Flamsteed numbers, variable stars arranged in traditional order (see Section 1.11), and then other names that take on genitive form. Stellar spectra are indicated by an asterisk. The best-known proper names have priority over their Greek-letter names. Spectra of the Sun and of nebulae are included as well. Abell 21 nucleus, see a Aurigae, see Capella Abell 78 nucleus, 327* ε Aurigae, 178, 186 Achernar, 9, 243, 264, 274 z Aurigae, 177, 186 Acrux, see Alpha Crucis Z Aurigae, 186, 269* Adhara, see Epsilon Canis Majoris AB Aurigae, 255 Albireo, 26 Alcor, 26, 177, 241, 243, 272* Barnard’s Star, 129–130, 131 Aldebaran, 9, 27, 80*, 163, 165 Betelgeuse, 2, 9, 16, 18, 20, 73, 74*, 79, Algol, 20, 26, 176–177, 271*, 333, 366 80*, 88, 104–105, 106*, 110*, 113, Altair, 9, 236, 241, 250 115, 118, 122, 187, 216, 264 a Andromedae, 273, 273* image of, 114 b Andromedae, 164 BDþ284211, 285* g Andromedae, 26 Bl 253* u Andromedae A, 218* a Boo¨tis, see Arcturus u Andromedae B, 109* g Boo¨tis, 243 Z Andromedae, 337 Z Boo¨tis, 185 Antares, 10, 73, 104–105, 113, 115, 118, l Boo¨tis, 254, 280, 314 122, 174* s Boo¨tis, 218* 53 Aquarii A, 195 53 Aquarii B, 195 T Camelopardalis,
    [Show full text]
  • Planetarium Handbook
    Portable Planetarium Handbook Susan Reynolds Button, Editor July 2002 Table of Contents Section I. Table of Contents .................................................................................... 1 Section II. Introduction ............................................................................................. 1 Section III. Contributors............................................................................................. 1 Section IV. Practical Applications of Portable Planetariums...................................1 A. Introduction: “Why are Portable Planetariums so Special?” .......................2 1. “Twenty Years on the Road: The Portable Planetarium’s Development and Contributions to the Teaching of Astronomy” ......................................................................................3 2. “Outreach: The Long Arm of STARLAB”.......................................18 3. “Professionalism and Survival Tactics” ..........................................20 B. Outreach with a Planetarium Specialist ....................................................22 1. “Reach Out and Teach Someone” ................................................ 23 2. “Student Intern/Mentor Program Proposal”................................... 26 3. “Student-Directed Planetarium Lessons and Other Creative Uses For STARLAB”..................................................................... 27 C. Outreach-Lending/Rental Programs and Teacher Training ..................... 30 1. “Unmanned Satellite” ...................................................................
    [Show full text]
  • Observations of a GX 301-2 Apastron Flare with the X-Calibur Hard X-Ray
    Typeset using LATEX twocolumn style in AASTeX62 Draft version January 13, 2020 Observations of a GX 301−2 Apastron Flare with the X-Calibur Hard X-Ray Polarimeter Supported by NICER, the Swift XRT and BAT, and Fermi GBM Q. Abarr,1 M. Baring,2 B. Beheshtipour,3 M. Beilicke,4 G. de Geronimo,5 P. Dowkontt,1 M. Errando,1 V. Guarino,6 N. Iyer,7, 8 F. Kislat,9 M. Kiss,7, 8 T. Kitaguchi,10 H. Krawczynski,1 J. Lanzi,11 S. Li,12 L. Lisalda,1 T. Okajima,13 M. Pearce,7, 8 L. Press,1 B. Rauch,1 D. Stuchlik,11 H. Takahashi,14 J. Tang,1 N. Uchida,14 A. West,1 P. Jenke,15 H. Krimm,16 A. Lien,17, 18 C. Malacaria,19, 20 J. M. Miller,21 and C. Wilson-Hodge19 1Washington University in St. Louis, 1 Brookings Dr., CB 1105, St. Louis, MO 63130 2Rice University, Department of Physics & Astronomy Department, 6100 Main Street, Houston TX 77251-1892 3 Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Leibniz Universit¨atHannover, formely: Washington University in St. Louis, 1 Brookings Dr., CB 1105, St. Louis, MO 63130 4Former affiliation: Washington University in St. Louis, 1 Brookings Dr., CB 1105, St. Louis, MO 63130 5DG CIrcuits, 30 Pine Rd, Syosset, NY 11791 6Guarino Engineering, 1134 S Scoville Ave Oak Park, IL 60304 7KTH Royal Institute of Technology, Department of Physics, 106 91 Stockholm, Sweden 8The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, 106 91 Stockholm, Sweden 9University of New Hampshire, Morse Hall, 8 College Rd, Durham, NH 03824 10RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198,
    [Show full text]
  • The Electric Sun Hypothesis
    Basics of astrophysics revisited. II. Mass- luminosity- rotation relation for F, A, B, O and WR class stars Edgars Alksnis [email protected] Small volume statistics show, that luminosity of bright stars is proportional to their angular momentums of rotation when certain relation between stellar mass and stellar rotation speed is reached. Cause should be outside of standard stellar model. Concept allows strengthen hypotheses of 1) fast rotation of Wolf-Rayet stars and 2) low mass central black hole of the Milky Way. Keywords: mass-luminosity relation, stellar rotation, Wolf-Rayet stars, stellar angular momentum, Sagittarius A* mass, Sagittarius A* luminosity. In previous work (Alksnis, 2017) we have shown, that in slow rotating stars stellar luminosity is proportional to spin angular momentum of the star. This allows us to see, that there in fact are no stars outside of “main sequence” within stellar classes G, K and M. METHOD We have analyzed possible connection between stellar luminosity and stellar angular momentum in samples of most known F, A, B, O and WR class stars (tables 1-5). Stellar equatorial rotation speed (vsini) was used as main parameter of stellar rotation when possible. Several diverse data for one star were averaged. Zero stellar rotation speed was considered as an error and corresponding star has been not included in sample. RESULTS 2 F class star Relative Relative Luminosity, Relative M*R *eq mass, M radius, L rotation, L R eq HATP-6 1.29 1.46 3.55 2.950 2.28 α UMi B 1.39 1.38 3.90 38.573 26.18 Alpha Fornacis 1.33
    [Show full text]
  • Chandra Spectroscopy of the Hot Star β Crucis and the Discovery Of
    Swarthmore College Works Physics & Astronomy Faculty Works Physics & Astronomy 6-1-2008 Chandra Spectroscopy Of The Hot Star β Crucis And The Discovery Of A Pre-Main-Sequence Companion David H. Cohen Swarthmore College, [email protected] Michael Ascher Kuhn , '07 M. Gagné Eric L.N. Jensen Swarthmore College, [email protected] N. A. Miller Follow this and additional works at: https://works.swarthmore.edu/fac-physics Part of the Astrophysics and Astronomy Commons Let us know how access to these works benefits ouy Recommended Citation David H. Cohen; Michael Ascher Kuhn , '07; M. Gagné; Eric L.N. Jensen; and N. A. Miller. (2008). "Chandra Spectroscopy Of The Hot Star β Crucis And The Discovery Of A Pre-Main-Sequence Companion". Monthly Notices Of The Royal Astronomical Society. Volume 386, Issue 4. 1855-1871. DOI: 10.1111/ j.1365-2966.2008.13176.x https://works.swarthmore.edu/fac-physics/6 This work is brought to you for free by Swarthmore College Libraries' Works. It has been accepted for inclusion in Physics & Astronomy Faculty Works by an authorized administrator of Works. For more information, please contact [email protected]. Mon. Not. R. Astron. Soc. 386, 1855–1871 (2008) doi:10.1111/j.1365-2966.2008.13176.x Chandra spectroscopy of the hot star β Crucis and the discovery of a pre-main-sequence companion David H. Cohen,1 Michael A. Kuhn,1† Marc Gagn´e,2 Eric L. N. Jensen1 and Nathan A. Miller3 1Department of Physics and Astronomy, Swarthmore College, Swarthmore, PA 19081, USA 2Department of Geology and Astronomy, West Chester University of Pennsylvania, West Chester, PA 19383, USA 3Department of Physics and Astronomy, University of Wisconsin-Eau Claire, Eau Claire, WI 54702, USA Accepted 2008 February 29.
    [Show full text]
  • Effects of Rotation Arund the Axis on the Stars, Galaxy and Rotation of Universe* Weitter Duckss1
    Effects of Rotation Arund the Axis on the Stars, Galaxy and Rotation of Universe* Weitter Duckss1 1Independent Researcher, Zadar, Croatia *Project: https://www.svemir-ipaksevrti.com/Universe-and-rotation.html; (https://www.svemir-ipaksevrti.com/) Abstract: The article analyzes the blueshift of the objects, through realized measurements of galaxies, mergers and collisions of galaxies and clusters of galaxies and measurements of different galactic speeds, where the closer galaxies move faster than the significantly more distant ones. The clusters of galaxies are analyzed through their non-zero value rotations and gravitational connection of objects inside a cluster, supercluster or a group of galaxies. The constant growth of objects and systems is visible through the constant influx of space material to Earth and other objects inside our system, through percussive craters, scattered around the system, collisions and mergers of objects, galaxies and clusters of galaxies. Atom and its formation, joining into pairs, growth and disintegration are analyzed through atoms of the same values of structure, different aggregate states and contiguous atoms of different aggregate states. The disintegration of complex atoms is followed with the temperature increase above the boiling point of atoms and compounds. The effects of rotation around an axis are analyzed from the small objects through stars, galaxies, superclusters and to the rotation of Universe. The objects' speeds of rotation and their effects are analyzed through the formation and appearance of a system (the formation of orbits, the asteroid belt, gas disk, the appearance of galaxies), its influence on temperature, surface gravity, the force of a magnetic field, the size of a radius.
    [Show full text]
  • Publications 2009
    Publications - print summary 3 Mar 2010 1 *ABDO, A.A. ,..., EDWARDS, P.G. et al. "Fermi/Large Area Telescope discovery of gamma-ray emission from the flat-spectrum radio quasar PKS 1454-354". (C) ApJ, 697, 934-941 (2009) Published 2 *ABDO, A.A., .... HOBBS, G., .... JOHNSTON, S., .... KEITH, M., .... MANCHESTER, R.N., .... WELTEVREDE, P. et al. "Discovery of pulsations from the pulsar J0205+6449 in SNR 3C 58 with the Fermi Gamma-Ray Space Telescope". (O) ApJ, 699, L102-L107 (2009). Published 3 *ABDO, A.A. ..., HOBBS, G. ..., JOHNSTON, S. ...., MANCHESTER, R.N. ...., WELTEVREDE, P. et al. "Fermi Large Area Telescope observations of the Vela pulsar'". (O) ApJ, 696, 1084-1093 (2009) Published 4 *ABDO, A.A. ..., HOBBS, G. ..., JOHNSTON, S. ...., MANCHESTER, R.N. ...., WELTEVREDE, P. et al. "A population of gamma-ray millisecond pulsars seen with the Fermi Large Area Telescope". (O) Science, 325, 848-852 (2009) Published 5 *ABDO, A.A. ..., HOBBS, G. ..., JOHNSTON, S. ...., MANCHESTER, R.N. ...., WELTEVREDE, P. et al. "Fermi Large Area Telescope detection of pulsed γ−rays from the Vela-like pulsars PSR J1048-5832 and PSR (O) J2229+6114". ApJ, 706, 1331-1340 (2009) Published 6 *ABDO, A.A. ,..., JOHNSTON, S., ..., HOBBS, G., KEITH, M., MANCHESTER, R.N. & WELTEVREDE, P. "Discovery of pulsed γ-rays from the young radio pulsar J1028-5819 with the Fermi Large Area Telescope". (O) ApJ, 695, L72-L77 (2009) Published 7 *ABDO, A.A. ,..., JOHNSTON, S., ..., MANCHESTER, R.N., ..., WELTEVREDE, P. et al. "Pulsed gamma-rays from PSR J2021+3651 with the Fermi Large Area Telescope". (O) ApJ, 700, 1059-1066 (2009) Published 8 *ABDO, A.A.
    [Show full text]
  • Aboriginal Astronomy: WA Focus
    Aboriginal Astronomy: WA Focus by Pat Forster Celebrated through quilts Supported by references from the literature With web links to Aboriginal art 1 Published privately by Dr Patricia Forster 17 The Promenade Mount Pleasant Western Australia 6153 [email protected] https://patforsterblog.wordpress.com/ 02/08/2021 2 Index Sun ………………………………………………………………………3 Moon ……………………………………………………….………….11 Milky Way ……………………………………………….……………. 22 Southern Cross, Pointers and Coal Sack ……………………….….31 Pleiades .……..…………………………………………………….. 37 Orion ...........................……………………………………………...48 Magellanic Clouds …………………………………………………… 51 Aurora …………………………………………………………………. 52 Venus ………………………………………………………….....… 53 Star Navigation ………………………………………………………. 55 Meteors …………………………………………………………….56 References ……………………………………………………………63 Warning: Readers are respectfully advised that this paper contains names of people who are deceased. Web links to images are provided- if a webpage is no longer available, search on the artist and image names. 3 Sun Sun and Aboriginal Culture, by Pat Forster, 2021, 62 cm x 42 cm Quilt statement: The depiction of the Sun refers to relevant traditional cultural beliefs from Western Australia Aboriginal peoples. Characterisations include that the Sun is: the creator; giver of life; spirit carrying lighted wood; wife of Moon; mother of Venus; sun has fire, moon has light. The; sunup (dawn) and sundown (dusk) positions of the Sun were used to establish directions; Sun was a focus of increase rituals; and eclipses were feared. The quilted collage was inspired by a print of the acrylic-painting collage by JackieGuttusoDesigns https://www.etsy.com/au/shop/JackieGuttusoDesigns?ref=simple-shop-header- name&listing_id=558105433 Cotton fabrics; polyester-cotton, polyester, and metallic threads; cotton wadding. Machined raw- edge and turned edge applique; trapuntoed centre of the Sun, free-motion quilted text, machined straight-line quilting.
    [Show full text]
  • Eric L. N. Jensen
    Eric L. N. Jensen Department of Physics and Astronomy [email protected] Swarthmore College http://astro.swarthmore.edu/~jensen/ Swarthmore, PA 19081 USA Office: 610-328-8249 Education Ph.D. in Astronomy, University of Wisconsin-Madison, August 1996; dissertation supervised by Robert Mathieu. Master of Science in Astronomy, University of Wisconsin-Madison, August 1992. Additional study of physics, astronomy, and mathematics, University of Minnesota, 1989–1990; Dean’s list Fall 1989. Bachelor of Arts in Physics, Carleton College, 1987. Graduated magna cum laude with distinction in Physics. Teaching and Research Experience Professor of Astronomy, Swarthmore College, 2012–present; Associate Professor 2004–2012; Assistant Professor 1998–2004. Physics & Astronomy Department Chair 2009–2014 (on leave academic year 2012–2013). Instructor and Visiting Research Associate, Arizona State University, 1996–1998. Teaching Assistant, University of Wisconsin–Madison, Sept.–Dec. 1990, Jan.–May 1996. Research Assistant, UW-Madison, 1991–1996. Instructor in physics, astronomy, and mathematics, Lake Forest Academy, Lake Forest, Illinois, 1987–1989. Grants “Collaborative Research: Triangulating on the Ages of Stars: Using Open Clusters to Calibrate Stellar Chronometers from Myr to Gyr Ages,” National Science Foundation, August 2011–July 2016. (Phillip Cargile, Vanderbilt University, PI) “Placing our Solar System in Context Through the Characterization of Long-Period Exoplanets,” National Science Foundation, August 2011–July 2014. (David Ciardi, Caltech, PI) “Testing Pre-Main-Sequence Stellar Models and Calibrating Age Determinations for Young Stars,” National Science Foundation’s Research Opportunity Award program (with Keivan Stassun, Vanderbilt University), August 2008–July 2009. “Binary Debris Disks: Follow-on Observations of Spitzer Discoveries,” NASA’s Spitzer Space Telescope, July 2008–September 2010.
    [Show full text]
  • September 2018 BRAS Newsletter
    Monthly Meeting Monday, September 10th at 7PM at HRPO (Monthly meetings are on 2nd Mondays, Highland Road Park Observatory). Presenter: Rob Hynes What's In This Issue? President’s Message Secretary's Summary Outreach Report Astrophotography Group Light Pollution Committee Report “Free The Milky Way” Campaign Recent Forum Entries Messages from the HRPO Friday Night Lecture Series Neptunian Elongation Globe at Night NASA 60th Anniversary 12th Annual Spooky Spectrum Observing Notes – Crux, the Southern Cross & Mythology Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society Newsletter of the Baton Rouge Astronomical Society September 2018 © 2018 President’s Message We are entering September and moving towards Autumn. The 2018 Autumnal Equinox will be on Saturday, September 22 at 8:54 PM(Central Time) I would like to thank John Moore from IOTA( International Occultation Timing Association) filling in at our meeting and congratulated he on obtaining data from HRPO of the 2018 August 15 Pluto Occultation. I regret that pneumonia kept me giving the talk. Members reminded of our upcoming meetings, the BRAS Business Meeting will be September 8 and the BRAS Monthly Meeting will be September 13, both will be at HRPO and at 7 PM. If you have not reserved your member pin yet please come to a meeting to so. We plan to have LIGO Day in November. REMINDERS: The BRAS Business Meeting will be Wednesday September 5th and the BRAS Monthly Meeting will be Monday September 10th. Both will be at HRPO at 7 PM. If you have not reserved your member pin yet, please come to a meeting to pick one up.
    [Show full text]
  • Stars Variability
    Status: 14.08.19 Conference Information & Presentations Stars and their Variability observed from space Celebrating the birthday of BRITE-Constellation August 19 to 23, 2019 https://starsandspace.univie.ac.at/ Content 1. FLASHLIGHTS as INTRODUCTION ...................................................... 1 1i01 - The space photometry revolution .................................................................................................................. 1 1i02 - The demystification of classical Be stars through space photometry ............................................................ 1 1i03 - Listening to the Heartbeat: Tidal Asteroseismology in Action ....................................................................... 1 1i04 - From no-go to highlights: Red Giants ........................................................................................................... 1 1i05 - An innovative distance determination technique: ripples of light ................................................................... 2 1i06 - Nova Carinae 2018 - a first in many respects ............................................................................................... 2 2. PARAMETER SPACE & PATTERN ....................................................... 3 2k01 - GAIA's revolution in stellar variability ........................................................................................................... 3 2k02 - What we can learn from constant stars, and what means constant? ..........................................................
    [Show full text]
  • Arxiv:0904.3078V2
    Astronomy and Astrophysics Review manuscript No. (will be inserted by the editor) X-Ray Spectroscopy of Stars Manuel G¨udel Yael¨ Naze´ · Received: 19 February 2009 / Accepted: 3 April 2009 Abstract Non-degenerate stars of essentially all spectral classes are soft X-ray sources. Their X-ray spectra have been important in constraining physical processes that heat plasma in stellar environments to temperatures exceeding one million degree. Low-mass stars on the cooler part of the main sequence and their pre-main sequence predecessors define the dominant stellar population in the galaxy by number. Their X-ray spectra are reminiscent, in the broadest sense, of X-ray spectra from the solar corona. The Sun itself as a typical exam- ple of a main-sequence cool star has been a pivotal testbed for physical models to be applied to cool stars. X-ray emission from cool stars is indeed ascribed to magnetically trapped hot gas analogous to the solar coronal plasma, although plasma parameters such as temperature, density, and element abundances vary widely. Coronal structure, its thermal stratification and geometric extent can also be interpreted based on various spectral diagnostics. New features have been identified in pre-main sequence stars; some of these may be related to accretion shocks on the stellar surface, fluorescence on circumstellar disks due to X-ray irradiation, or shock heating in stellar outflows. Massive, hot stars clearly dominate the interaction with the galactic interstellar medium: they are the main sources of ionizing radiation, mechan- ical energy and chemical enrichment in galaxies. High-energy emission permits to probe some of the most important processes at work in these stars, and put constraints on their most peculiar feature: the stellar wind.
    [Show full text]