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The GALAH survey :
The GALAH survey : accurate radial velocities and library of observed stellar template spectra
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- Zwitter, Tomaz (författare)
- Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.
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- Kos, Janez (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.
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- Chiavassa, Andrea (författare)
- Univ Cote Azur, Observ Cote Azur, CNRS, F-34229 Nice, France.
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visa fler...
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- Buder, Sven (författare)
- MPIA, Koenigstuhl 17, D-69117 Heidelberg, Germany.
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- Traven, Gregor (författare)
- Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.
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- Cotar, Klemen (författare)
- Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.
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- Lin, Jane (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.
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- Asplund, Martin (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.
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- Bland-Hawthorn, Joss (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.
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- Casey, Andrew R. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Monash Univ, Fac Informat Technol, Clayton, Vic 3800, Australia.
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- De Silva, Gayandhi (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.;Australian Astron Observ, N Ryde, NSW 2133, Australia.
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Duong, Ly (författare)
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- Freeman, Kenneth C. (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.
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- Lind, Karin (författare)
- Uppsala universitet,Teoretisk astrofysik,MPIA, Koenigstuhl 17, D-69117 Heidelberg, Germany.
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- Martell, Sarah (författare)
- UNSW, Sch Phys, Sydney, NSW 2052, Australia.
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- D'Orazi, Valentina (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Osserv Astron Padova, INAF, Sede Asiago, I-36012 Asiago, VI, Italy.;Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia.
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- Schlesinger, Katharine J. (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.
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- Simpson, Jeffrey D. (författare)
- Australian Astron Observ, N Ryde, NSW 2133, Australia.;UNSW, Sch Phys, Sydney, NSW 2052, Australia.
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- Sharma, Sanjib (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.
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- Zucker, Daniel B. (författare)
- Australian Astron Observ, N Ryde, NSW 2133, Australia.;Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia.
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- Anguiano, Borja (författare)
- Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia.;Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.
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- Casagrande, Luca (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.
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- Collet, Remo (författare)
- Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Horner, Jonathan (författare)
- Univ Southern Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia.
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- Ireland, Michael J. (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.
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- Kafle, Prajwal R. (författare)
- Univ Western Australia, ICRAR, 35 Stirling Highway, Crawley, WA 6009, Australia.
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- Lewis, Geraint (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.
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- Munari, Ulisse (författare)
- Osserv Astron Padova, INAF, Sede Asiago, I-36012 Asiago, VI, Italy.
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- Nataf, David M. (författare)
- Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD 21218 USA.;Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
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- Ness, Melissa (författare)
- MPIA, Koenigstuhl 17, D-69117 Heidelberg, Germany.
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- Nordlander, Thomas (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.
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- Stello, Dennis (författare)
- Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia.;Ctr Excellence Astrophys Three Dimens ASTRO 3, Canberra, ACT 2611, Australia.;UNSW, Sch Phys, Sydney, NSW 2052, Australia.;Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.
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- Ting, Yuan-Sen (författare)
- Inst Adv Study, Olden Lane, Princeton, NJ 08540 USA.;Observ Carnegie Inst Washington, 813 Santa Barbara St, Pasadena, CA 91101 USA.;Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
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- Tinney, Chris G. (författare)
- UNSW, Sch Phys, Sydney, NSW 2052, Australia.
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- Watson, Fred (författare)
- Australian Astron Observ, N Ryde, NSW 2133, Australia.;Western Sydney Univ, Locked Bag 1797, Penrith, NSW 2751, Australia.
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- Wittenmyer, Rob A. (författare)
- Univ Southern Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia.
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- Zerjal, Marusa (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.
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Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia. (creator_code:org_t)
- 2018-08-23
- 2018
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 481:1, s. 645-654
- Relaterad länk:
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https://arxiv.org/pd...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- GALAH is a large-scale magnitude-limited southern stellar spectroscopic survey. Its second data release (GALAH DR2) provides values of stellar parameters and abundances of 23 elements for 342 682 stars (Buder et al.). Here we add a description of the public release of radial velocities with a typical accuracy of 0.1 km s(-1) for 336 215 of these stars, achievable due to the large wavelength coverage, high resolving power, and good signal-to-noise ratio of the observed spectra, but also because convective motions in stellar atmosphere and gravitational redshift from the star to the observer are taken into account. In the process we derive medians of observed spectra that are nearly noiseless, as they are obtained from between 100 and 1116 observed spectra belonging to the same bin with a width of 50 K in temperature, 0.2 dex in gravity, and 0.1 dex in metallicity. Publicly released 1181 median spectra have a resolving power of 28 000 and trace the well-populated stellar types with metallicities between -0.6 and +0.3. Note that radial velocities from GALAH are an excellent match to the accuracy of velocity components along the sky plane derived by Gaia for the same stars. The level of accuracy achieved here is adequate for studies of dynamics within stellar clusters, associations, and streams in the Galaxy. So it may be relevant for studies of the distribution of dark matter.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- methods: data analysis
- methods: observational
- surveys
- stars: fundamental parameters
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Zwitter, Tomaz
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Kos, Janez
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Chiavassa, Andre ...
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Buder, Sven
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Traven, Gregor
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Cotar, Klemen
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visa fler...
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Lin, Jane
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Asplund, Martin
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Bland-Hawthorn, ...
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Casey, Andrew R.
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De Silva, Gayand ...
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Duong, Ly
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Freeman, Kenneth ...
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Lind, Karin
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Martell, Sarah
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D'Orazi, Valenti ...
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Schlesinger, Kat ...
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Simpson, Jeffrey ...
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Sharma, Sanjib
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Zucker, Daniel B ...
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Anguiano, Borja
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Casagrande, Luca
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Collet, Remo
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Horner, Jonathan
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Ireland, Michael ...
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Kafle, Prajwal R ...
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Lewis, Geraint
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Munari, Ulisse
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Nataf, David M.
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Ness, Melissa
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Nordlander, Thom ...
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Stello, Dennis
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Ting, Yuan-Sen
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Tinney, Chris G.
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Watson, Fred
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Wittenmyer, Rob ...
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Zerjal, Marusa
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