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The GALAH survey :
The GALAH survey : co-orbiting stars and chemical tagging
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- Simpson, Jeffrey D. (author)
- UNSW, Sch Phys, Sydney, Australia; Australian Astron Observ, N Ryde, Australia
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- Martell, Sarah L. (author)
- UNSW, Sch Phys, Sydney, Australia; Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia
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- Da Costa, Gary (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Casey, Andrew R. (author)
- Monash Univ, Sch Phys & Astron, Clayton, Vic, Australia; Monash Univ, Fac Informat Technol, Clayton, Vic, Australia
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- Freeman, Ken C. (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Horner, Jonathan (author)
- Univ Southern Queensland, Toowoomba, Australia
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- Ting, Yuan-Sen (author)
- Inst Adv Study, Princeton, NJ USA; Princeton Univ, Dept Astrophys Sci, Princeton, NJ USA; Observ Carnegie Inst Washington, Pasadena, CA USA
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- Nataf, David M. (author)
- Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD USA
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- Lewis, Geraint F. (author)
- Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW, Australia
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- Ness, Melissa K. (author)
- Columbia Univ, Dept Astron, Pupin Phys Lab, New York, NY USA
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- Zucker, Daniel B. (author)
- Macquarie Univ, Dept Phys & Astron, Sydney, NSW, Australia
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- Cottrell, Peter L. (author)
- Univ Canterbury, Sch Phys & Chem Sci, Christchurch, New Zealand; Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic, Australia
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- Čotar, Klemen (author)
- Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia
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- Asplund, Martin (author)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia; Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Bland-Hawthorn, Joss (author)
- Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, Australia
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- Buder, Sven (author)
- Max Planck Inst Astron MPIA, Heidelberg, Germany
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- D'Orazi, Valentina (author)
- Osserv Astron Padova, Ist Nazl Astrofis, Padua, Italy
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- De Silva, Gayandhi M. (author)
- Australian Astron Observ, N Ryde, Australia; Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, Australia; Macquarie Univ, Australian Astron Opt, N Ryde, Australia
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- Duong, Ly (author)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia; Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Kos, Janez (author)
- Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, Australia
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- Lin, Jane (author)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia; Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Lind, Karin (author)
- Uppsala universitet,Teoretisk astrofysik,Max Planck Inst Astron (MPIA), Heidelberg, Germany
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- Schlesinger, Katharine J. (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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- Sharma, Sanjib (author)
- Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, Australia
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- Zwitter, Tomaž (author)
- Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia
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- Kafle, Prajwal R. (author)
- Univ Western Australia, ICRAR, Crawley, Australi
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- Nordlander, Thomas (author)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia; Australian Natl Univ, Res Sch Astron & Astrophys, Weston, Australia
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(creator_code:org_t)
- 2018-11-10
- 2019
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 482:4, s. 5302-5315
- Related links:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- We present a study using the second data release of the GALAH survey of stellar parameters and elemental abundances of 15 pairs of stars identified by Oh et al. They identified these pairs as potentially co-moving pairs using proper motions and parallaxes from Gaia DR1. We find that 11 very wide (>1 pc) pairs of stars do in fact have similar Galactic orbits, while a further four claimed co-moving pairs are not truly co-orbiting. Eight of the 11 co-orbiting pairs have reliable stellar parameters and abundances, and we find that three of those are quite similar in their abundance patterns, while five have significant [Fe/H] differences. For the latter, this indicates that they could be co-orbiting because of the general dynamical coldness of the thin disc, or perhaps resonances induced by the Galaxy, rather than a shared formation site. Stars such as these, wide binaries, debris of past star formation episodes, and coincidental co-orbiters, are crucial for exploring the limits of chemical tagging in the Milky Way.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars
- abundances
- stars
- formation
- galaxy
- disc
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Simpson, Jeffrey ...
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Martell, Sarah L ...
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Da Costa, Gary
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Casey, Andrew R.
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Freeman, Ken C.
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Horner, Jonathan
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show more...
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Ting, Yuan-Sen
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Nataf, David M.
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Lewis, Geraint F ...
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Ness, Melissa K.
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Zucker, Daniel B ...
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Cottrell, Peter ...
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Čotar, Klemen
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Asplund, Martin
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Bland-Hawthorn, ...
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Buder, Sven
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D'Orazi, Valenti ...
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De Silva, Gayand ...
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Duong, Ly
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Kos, Janez
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Lin, Jane
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Lind, Karin
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Schlesinger, Kat ...
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Sharma, Sanjib
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Zwitter, Tomaž
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Kafle, Prajwal R ...
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Nordlander, Thom ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Uppsala University