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The GALAH Survey :
The GALAH Survey : Chemically tagging the Fimbulthul stream to the globular cluster omega Centauri
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- Simpson, Jeffrey D. (författare)
- UNSW, Sch Phys, Sydney, NSW 2052, Australia
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- Martell, Sarah L. (författare)
- UNSW, Sch Phys, Sydney, NSW 2052, Australia;Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia
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- Da Costa, Gary (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
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- Horner, Jonathan (författare)
- Univ Southern Queensland, Ctr Astrophys, Toowoomba, Qld 4350, Australia
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- Wyse, Rosemary F. G. (författare)
- Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
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- Ting, Yuan-Sen (författare)
- Inst Adv Study, Princeton, NJ 08540 USA;Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA;Observ Carnegie Inst Washington, 813 Santa Barbara St, Pasadena, CA 91101 USA
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- Asplund, Martin (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
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- Bland-Hawthorn, Joss (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Univ Sydney, Sch Phys, Sydney Inst Astron, A28, Sydney, NSW 2006, Australia
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- Buder, Sven (författare)
- MPIA, Koenigstuhl 17, D-117 Heidelberg, Germany
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- De Silva, Gayandhi M. (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Macquarie Univ, Fac Sci & Engn, Australian Astron Opt, Macquarie Pk, NSW 2113, Australia
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- Freeman, Ken C. (författare)
- Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
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- Kos, Janez (författare)
- Univ Sydney, Sch Phys, Sydney Inst Astron, A28, Sydney, NSW 2006, Australia;Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia
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- Lewis, Geraint F. (författare)
- Univ Sydney, Sch Phys, Sydney Inst Astron, A28, Sydney, NSW 2006, Australia
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- Lind, Karin (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,MPIA, Koenigstuhl 17, D-117 Heidelberg, Germany;
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- Sharma, Sanjib (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Univ Sydney, Sch Phys, Sydney Inst Astron, A28, Sydney, NSW 2006, Australia
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- Zucker, Daniel B. (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia
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- Zwitter, Tomaz (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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- Cottrell, Peter L. (författare)
- Univ Canterbury, Sch Phys & Chem Sci, Christchurch, New Zealand;Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Melbourne, Vic, Australia
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- Nordlander, Thomas (författare)
- Ctr Excellence Astrophys Three Dimens ASTRO 3D, Sydney, NSW, Australia;Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
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(creator_code:org_t)
- 2019-11-05
- 2020
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 491:3, s. 3374-3384
- Relaterad länk:
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https://academic.oup...
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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
- Using kinematics from Gaia and the large elemental abundance space of the second data release of the GALAH survey, we identify two new members of the Fimbulthul stellar stream, and chemically tag them to massive, multimetallic globular cluster omega Centauri. Recent analysis of the second data release of Gaia had revealed the Fimbulthul stellar stream in the halo of the Milky Way. It had been proposed that the stream is associated with the omega Cen, but this proposition relied exclusively upon the kinematics and metallicities of the stars to make the association. In this work, we find our two new members of the stream to be metal-poor stars that are enhanced in sodium and aluminium, typical of second population globular cluster stars, but not otherwise seen in field stars. Furthermore, the stars share the s-process abundance pattern seen in omega Cen, which is rare in field stars. Apart from one star within 1.5 deg of omega Cen, we find no other stars observed by GALAH spatially near omega Cen or the Fimbulthul stream that could be kinematically and chemically linked to the cluster. Chemically tagging stars in the Fimbulthul stream to omega Cen confirms the earlier work, and further links this tidal feature in the Milky Way halo to omega Cen.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- globular clusters: individual: omega Cen
- galaxy: halo
- galaxy: kinematics and dynamics
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- Av författaren/redakt...
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Simpson, Jeffrey ...
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Martell, Sarah L ...
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Da Costa, Gary
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Horner, Jonathan
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Wyse, Rosemary F ...
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Ting, Yuan-Sen
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visa fler...
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Asplund, Martin
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Bland-Hawthorn, ...
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Buder, Sven
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De Silva, Gayand ...
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Freeman, Ken C.
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Kos, Janez
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Lewis, Geraint F ...
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Lind, Karin
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Sharma, Sanjib
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Zucker, Daniel B ...
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Zwitter, Tomaz
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Cotar, Klemen
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Cottrell, Peter ...
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Nordlander, Thom ...
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