Sökning: WFRF:(Tautvaišiene G.) >
The Gaia-ESO Survey :
The Gaia-ESO Survey : empirical estimates of stellar ages from lithium equivalent widths (eagles)
-
- Jeffries, R. D. (författare)
- Keele Univ, Astrophys Grp, Keele ST55BG, Staffs, England.
-
- Jackson, R. J. (författare)
- Keele Univ, Astrophys Grp, Keele ST55BG, Staffs, England.
-
- Wright, Nicholas J. (författare)
- Keele Univ, Astrophys Grp, Keele ST55BG, Staffs, England.
-
visa fler...
-
- Weaver, G. (författare)
- Keele Univ, Astrophys Grp, Keele ST55BG, Staffs, England.
-
- Gilmore, G. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB30HA, England.
-
- Randich, S. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
-
- Bragaglia, A. (författare)
- INAF Osservatorio Astrofis & Sci Spazio Bologna, via Gobetti 93 3, I-40129 Bologna, Italy.
-
- Korn, Andreas, 1972- (författare)
- Uppsala universitet,Teoretisk astrofysik,Observationell astrofysik
-
- Smiljanic, R. (författare)
- Polish Acad Sci, Nicolaus Copernicus Astron Ctr, ul Bartycka 18, PL-00716 Warsaw, Poland.
-
- Biazzo, K. (författare)
- INAF Osservatorio Astrofis Catania, via S Sofia 78, I-95123 Catania, Italy.
-
- Casey, A. R. (författare)
- Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Clayton, VIC 3800, Australia.;Monash Univ, Monash Fac Informat Technol, Clayton, Vic 3800, Australia.
-
Frasca, A. (författare)
-
- Gonneau, A. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB30HA, England.
-
- Guiglion, G. (författare)
- Leibniz Inst Astrophys Potsdam AIP, Ander Sternwarte 16, D-14482 Potsdam, Germany.
-
- Morbidelli, L. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
-
- Prisinzano, L. (författare)
- INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy.
-
- Sacco, G. G. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
-
- Tautvaisiene, G. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio av 3, LT-10257 Vilnius, Lithuania.
-
- Worley, C. C. (författare)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
-
- Zaggia, S. (författare)
- INAF Padova Observ, Vicolo Osservatorio 5, I-35122 Padua, Italy.
-
visa färre...
-
Keele Univ, Astrophys Grp, Keele ST55BG, Staffs, England Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB30HA, England. (creator_code:org_t)
- Oxford University Press (OUP), 2023
- 2023
- Engelska.
-
Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 523:1, s. 802-824
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We present an empirical model of age-dependent photospheric lithium depletion, calibrated using a large homogeneously analysed sample of 6200 stars in 52 open clusters, with ages from 2 to 6000 Myr and -0.3 < [Fe/H] < 0.2, observed in the Gaia-ESO spectroscopic survey. The model is used to obtain age estimates and posterior age probability distributions from measurements of the Li i 6708 angstrom equivalent width for individual (pre) main-sequence stars with 3000 < T-eff/K < 6500, a domain where age determination from the HR diagram is either insensitive or highly model-dependent. In the best cases, precisions of 0.1 dex in log age are achievable; even higher precision can be obtained for coeval groups and associations where the individual age probabilities of their members can be combined. The method is validated on a sample of exoplanet-hosting young stars, finding agreement with claimed young ages for some, but not others. We obtain better than 10 per cent precision in age, and excellent agreement with published ages, for seven well-studied young moving groups. The derived ages for young clusters (<1 Gyr) in our sample are also in good agreement with their training ages, and consistent with several published model-insensitive lithium depletion boundary ages. For older clusters, there remain systematic age errors that could be as large as a factor of 2. There is no evidence to link these errors to any strong systematic metallicity dependence of (pre) main-sequence lithium depletion, at least in the range -0.29 < [Fe/H] < 0.18. Our methods and model are provided as software - 'Empirical AGes from Lithium Equivalent widthS' (eagles).
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- stars: abundances
- stars: evolution
- stars: fundamental parameters
- stars: pre-main-sequence
- open clusters and associations: general
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Jeffries, R. D.
-
Jackson, R. J.
-
Wright, Nicholas ...
-
Weaver, G.
-
Gilmore, G.
-
Randich, S.
-
visa fler...
-
Bragaglia, A.
-
Korn, Andreas, 1 ...
-
Smiljanic, R.
-
Biazzo, K.
-
Casey, A. R.
-
Frasca, A.
-
Gonneau, A.
-
Guiglion, G.
-
Morbidelli, L.
-
Prisinzano, L.
-
Sacco, G. G.
-
Tautvaisiene, G.
-
Worley, C. C.
-
Zaggia, S.
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
- Artiklar i publikationen
-
Monthly notices ...
- Av lärosätet
-
Uppsala universitet