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The Gaia-ESO Survey :
The Gaia-ESO Survey : Hydrogen lines in red giants directly trace stellar mass
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- Bergemann, Maria (författare)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Serenelli, Aldo (författare)
- Campus UAB, ICE CSIC IEEC, Inst Ciencias Espacio, Carrer Can Magrans S-N, Bellaterra 08193, Spain.,Autonomous University of Barcelona
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- Schonrich, Ralph (författare)
- Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England.,University of Oxford
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- Ruchti, Greg (författare)
- Lund Observ, Box 43, S-22100 Lund, Sweden.
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- Korn, Andreas (författare)
- Uppsala University,Uppsala universitet,Institutionen för fysik och astronomi,Uppsala Univ, Div Astron & Space Phys, Dept Phys & Astron, Angstrom Lab, Box 516, S-75120 Uppsala, Sweden.
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- Hekker, Saskia (författare)
- Max Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gttingen, Germany.,Max Planck Institute for Solar System Research,Aarhus University
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- Kovalev, Mikhail (författare)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Mashonkina, Lyudmila (författare)
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences
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- Gilmore, Gerry (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Randich, Sofia (författare)
- INAF Osservatorio Astrofis Arcetri, Largo Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Asplund, Martin (författare)
- Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia.,Australian National University
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- Rix, Hans-Walter (författare)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Casey, Andrew R. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Jofre, Paula (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Pancino, Elena (författare)
- INAF Osservatorio Astron, Via Ranzani 1, I-40127 Bologna, Italy.;ASI Sci Data Ctr, Via Politecn SNC, I-00133 Rome, Italy.,INAF Osservatorio Astronomico di Bologna,Italian Space Agency
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- Recio-Blanco, Alejandra (författare)
- Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange, BP 4229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis
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- de Laverny, Patrick (författare)
- Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange, BP 4229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis
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- Smiljanic, Rodolfo (författare)
- Nicolaus Copernicus Astron Ctr, Dept Astrophys, Ul Rabianska 8, PL-87100 Torun, Poland. Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, Ny Munckegade 120, DK-8000 Aarhus, Denmark.,Institute - Center for Molecular and Macromolecular Studies of the Polish Academy of Sciences
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- Tautvaisiene, Grazina (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Gostauto 12, LT-01108 Vilnius, Lithuania.,Vilnius University
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- Bayo, Amelia (författare)
- Inst Fis & Astron, Fac Ciencias, Gran Bretana 1111, Playa Ancha, Chile.,University of Valparaíso
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- Lewis, Jim (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Koposov, Sergey (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Hourihane, Anna (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Worley, Clare (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Morbidelli, Lorenzo (författare)
- INAF Osservatorio Astrofis Arcetri, Largo Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Franciosini, Elena (författare)
- INAF Osservatorio Astrofis Arcetri, Largo Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Sacco, Germano (författare)
- INAF Osservatorio Astrofis Arcetri, Largo Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Magrini, Laura (författare)
- INAF Osservatorio Astrofis Arcetri, Largo Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Damiani, Francesco (författare)
- INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy. Russian Acad Sci, Inst Astron, Pyatnitskaya St 48, Moscow 119017, Russia.,National Institute for Astrophysics
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- Bestenlehner, Joachim M. (författare)
- Max Planck Institute for Astronomy
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- Ruchti, Gregory (författare)
- Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science
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Max Planck Inst Astron, D-69117 Heidelberg, Germany Max Planck Institute for Astronomy (creator_code:org_t)
- 2016-10-20
- 2016
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 594
- Relaterad länk:
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https://www.aanda.or...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Red giant stars are perhaps the most important type of stars for Galactic and extra-galactic archaeology: they are luminous, occur in all stellar populations, and their surface temperatures allow precise abundance determinations for many different chemical elements. Yet, the full star formation and enrichment history of a galaxy can be traced directly only if two key observables can be determined for large stellar samples: age and chemical composition. While spectroscopy is a powerful method to analyse the detailed abundances of stars, stellar ages are the missing link in the chain, since they are not a direct observable. However, spectroscopy should be able to estimate stellar masses, which for red giants directly infer ages provided their chemical composition is known. Here we establish a new empirical relation between the shape of the hydrogen line in the observed spectra of red giants and stellar mass determined from asteroseismology. The relation allows determining stellar masses and ages with an accuracy of 10-15%. The method can be used with confidence for stars in the following range of stellar parameters: 4000 < T-eff < 5000 K, 0.5 < log g < 3.5, -2.0 < [ Fe/H] < 0.3, and luminosities log L/L-Sun < 2.5. Our analysis provides observational evidence that the H-alpha spectral characteristics of red giant stars are tightly correlated with their mass and therefore their age. We also show that the method samples well all stellar populations with ages above 1 Gyr. Targeting bright giants, the method allows obtaining simultaneous age and chemical abundance information far deeper than would be possible with asteroseismology, extending the possible survey volume to remote regions of the Milky Way and even to neighbouring galaxies such as Andromeda or the Magellanic Clouds even with current instrumentation, such as the VLT and Keck facilities.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- techniques: spectroscopic
- stars: fundamental parameters
- stars: late-type
- Galaxy: stellar content
- Galaxy: stellar content
- Stars: fundamental parameters
- Stars: late-type
- Techniques: spectroscopic
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Till lärosätets databas
- Av författaren/redakt...
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Bergemann, Maria
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Serenelli, Aldo
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Schonrich, Ralph
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Ruchti, Greg
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Korn, Andreas
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Hekker, Saskia
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visa fler...
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Kovalev, Mikhail
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Mashonkina, Lyud ...
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Gilmore, Gerry
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Randich, Sofia
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Asplund, Martin
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Rix, Hans-Walter
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Casey, Andrew R.
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Jofre, Paula
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Pancino, Elena
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Recio-Blanco, Al ...
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de Laverny, Patr ...
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Smiljanic, Rodol ...
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Tautvaisiene, Gr ...
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Bayo, Amelia
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Lewis, Jim
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Koposov, Sergey
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Hourihane, Anna
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Worley, Clare
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Morbidelli, Lore ...
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Franciosini, Ele ...
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Sacco, Germano
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Magrini, Laura
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Damiani, Frances ...
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Bestenlehner, Jo ...
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Ruchti, Gregory
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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Astronomy and As ...
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Uppsala universitet
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Lunds universitet