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The GALAH survey :
The GALAH survey : a new constraint on cosmological lithium and Galactic lithium evolution from warm dwarf stars
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- Gao, Xudong (author)
- Max Planck Inst Astron MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany.;Heidelberg Univ, Int Max Planck Res Sch Astron & Cosm Phys, Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Lind, Karin (author)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Max-Planck-Institut für Astronomie, Germany,Max Planck Inst Astron MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany.;Stockholm Univ, Dept Astron, AlbaNova, Roslagstull Backen 21, SE-10691 Stockholm, Sweden.
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- Amarsi, Anish (author)
- Uppsala University,Uppsala universitet,Teoretisk astrofysik,Max Planck Inst Astron MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany.,Univ Southern Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia.,Max Planck Institute for Astronomy,University of Southern Queensland
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- Buder, Sven (author)
- Max Planck Inst Astron MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany.;Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Heidelberg Univ, Int Max Planck Res Sch Astron & Cosm Phys, Heidelberg, Germany.,Australian National University,Max Planck Institute for Astronomy,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Bland-Hawthorn, Joss (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Univ Sydney, Sydney Inst Astron SIfA, Sch Phys A28, Sydney, NSW 2006, Australia.,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of Sydney
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- Campbell, Simon W. (author)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.,Monash University
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- Asplund, Martin (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Australian National University
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- Casey, Andrew R. (author)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Monash Univ, Monash Ctr Astrophys, Clayton, Vic 3800, Australia.,Monash University
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- De Silva, Gayandhi M. (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Macquarie Univ, Australian Astron Opt, 105 Delhi Rd, N Ryde, NSW 2113, Australia.,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Macquarie University, Sydney
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- Freeman, Ken C. (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.,Australian National University
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- Hayden, Michael R. (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Univ Sydney, Sydney Inst Astron SIfA, Sch Phys A28, Sydney, NSW 2006, Australia.,University of Sydney,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Lewis, Geraint F. (author)
- Univ Sydney, Sydney Inst Astron SIfA, Sch Phys A28, Sydney, NSW 2006, Australia.,University of Sydney
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- Martell, Sarah L. (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of New South Wales
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- Simpson, Jeffrey D. (author)
- Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.,University of New South Wales
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- Sharma, Sanjib (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Univ Sydney, Sydney Inst Astron SIfA, Sch Phys A28, Sydney, NSW 2006, Australia.,University of Sydney,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Zucker, Daniel B. (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia.;Macquarie Univ, Res Ctr Astron Astrophys & Astrophoton, Sydney, NSW 2109, Australia.,Macquarie University, Sydney,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Zwitter, Tomaž (author)
- Univ Ljubljana, Fac Math Caul Phys, Jadranska 19, Ljubljana 1000, Slovenia.,University of Ljubljana
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- Horner, Jonathan (author)
- Univ Southern Queensland, Ctr Astrophys, Toowoomba, Qld 4350, Australia.,University of Southern Queensland
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- Munari, Ulisse (author)
- INAF, Astron Observ Padova, I-36012 Asiago, Italy.,INAF - Osservatorio Astronomico di Padova
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- Nordlander, Thomas (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.,Australian National University,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Stello, Dennis (author)
- Ctr Excellence All Sky Astrophys Three Dimens AST, Weston, ACT 2611, Australia.;Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia.;Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, DK-8000 Aarhus C, Denmark.,University of New South Wales,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Aarhus University
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- Ting, Yuan-Sen (author)
- Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;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.,Institute for Advanced Study, Princeton,Carnegie Observatories,Australian National University,Princeton University
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- Traven, Gregor (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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Wittenmyer, Robert A. (author)
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Max Planck Inst Astron MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany;Heidelberg Univ, Int Max Planck Res Sch Astron & Cosm Phys, Heidelberg, Germany. Max Planck Institute for Astronomy (creator_code:org_t)
- 2020-06-08
- 2020
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966 .- 1745-3925 .- 1745-3933. ; 497:1, s. L30-L34
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Abstract
Subject headings
Close
- Lithium depletion and enrichment in the cosmos is not yet well understood. To help tighten constraints on stellar and Galactic evolution models, we present the largest high-resolution analysis of Li abundances A(Li) to date, with results for over 100000 GALAH (Galactic Archeology with HERMES) field stars spanning effective temperatures 5900K≲Teff≲7000K and metallicities −3 ≲ [Fe/H] ≲ +0.5. We separated these stars into two groups, on the warm and cool sides of the so-called Li dip, a localized region of the Kiel diagram wherein lithium is severely depleted. We discovered that stars in these two groups show similar trends in the A(Li)–[Fe/H] plane, but with a roughly constant offset in A(Li) of 0.4dex, the warm group having higher Li abundances. At [Fe/H]≳−0.5, a significant increase in Li abundance with increasing metallicity is evident in both groups, signalling the onset of significant Galactic production. At lower metallicity, stars in the cool group sit on the Spite plateau, showing a reduced lithium of around 0.4dex relative to the primordial value predicted from big bang nucleosynthesis (BBN). However, stars in the warm group between [Fe/H] = −1.0 and −0.5 form an elevated plateau that is largely consistent with the BBN prediction. This may indicate that these stars in fact preserve the primordial Li produced in the early Universe.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- techniques: spectroscopic
- stars: abundances
- stars: atmospheres
- stars: late-type
- Galaxy: abundances
- cosmology: primordial nucleosynthesis
- cosmology: primordial nucleosynthesis
- Galaxy: Abundances
- stars: Abundances
- stars: Atmospheres
- stars: late-Type
- techniques: spectroscopic
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Gao, Xudong
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Lind, Karin
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Amarsi, Anish
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Buder, Sven
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Bland-Hawthorn, ...
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Campbell, Simon ...
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show more...
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Asplund, Martin
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Casey, Andrew R.
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De Silva, Gayand ...
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Freeman, Ken C.
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Hayden, Michael ...
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Lewis, Geraint F ...
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Martell, Sarah L ...
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Simpson, Jeffrey ...
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Sharma, Sanjib
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Zucker, Daniel B ...
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Zwitter, Tomaž
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Horner, Jonathan
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Munari, Ulisse
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Nordlander, Thom ...
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Stello, Dennis
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Ting, Yuan-Sen
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Traven, Gregor
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Wittenmyer, Robe ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Stockholm University
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Uppsala University
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Lund University