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  • Binks, A. S.Keele Univ, Sch Chem & Phys Sci, Astrophys Grp, Keele ST5 5BG, Staffs, England. (author)

The Gaia-ESO survey : a lithium depletion boundary age for NGC 2232

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-05-12
  • Oxford University Press,2021
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-453569
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-453569URI
  • https://doi.org/10.1093/mnras/stab1351DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Astrometry and photometry from Gaia and spectroscopic data from the Gaia-ESO Survey (GES) are used to identify the lithium depletion boundary (LDB) in the young cluster NGC 2232. A specialized spectral line analysis procedure was used to recover the signature of undepleted lithium in very low luminosity cluster members. An age of 38 +/- 3 Myr is inferred by comparing the LDB location in absolute colour-magnitude diagrams (CMDs) with the predictions of standard models. This is more than twice the age derived from fitting isochrones to low-mass stars in the CMD with the same models. Much closer agreement between LDB and CMD ages is obtained from models that incorporate magnetically suppressed convection or flux-blocking by dark, magnetic starspots. The best agreement is found at ages of 45-50 Myr for models with high levels of magnetic activity and starspot coverage fractions >50 percent, although a uniformly high spot coverage does not match the CMD well across the full luminosity range considered.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Jeffries, R. D.Keele Univ, Sch Chem & Phys Sci, Astrophys Grp, Keele ST5 5BG, Staffs, England. (author)
  • Jackson, R. J.Keele Univ, Sch Chem & Phys Sci, Astrophys Grp, Keele ST5 5BG, Staffs, England. (author)
  • Franciosini, E.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (author)
  • Sacco, G. G.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (author)
  • Bayo, A.Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111, Valparaiso, Chile.;Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso, Chile. (author)
  • Magrini, L.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (author)
  • Randich, S.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (author)
  • Arancibia-Silva, J.Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111, Valparaiso, Chile.;Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso, Chile. (author)
  • Bergemann, M.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany. (author)
  • Bragaglia, A.INAF Osservatorio Astrofis & Sci Spazio, Via Gobetti 93-3, I-40129 Bologna, Italy. (author)
  • Gilmore, G.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England. (author)
  • Gonneau, A.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England. (author)
  • Hourihane, A.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England. (author)
  • Jofre, P.Univ Diego Portales UDP, Fac Ingn & Ciencias, Nucleo Astron, Santiago, Chile. (author)
  • Korn, Andreas,1972-Uppsala universitet,Observationell astrofysik(Swepub:uu)ankor103 (author)
  • Morbidelli, L.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (author)
  • Prisinzano, L.INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy. (author)
  • Worley, C. C.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England. (author)
  • Zaggia, S.INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy. (author)
  • Keele Univ, Sch Chem & Phys Sci, Astrophys Grp, Keele ST5 5BG, Staffs, England.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (creator_code:org_t)

Related titles

  • In:Monthly notices of the Royal Astronomical Society: Oxford University Press505:1, s. 1280-12920035-87111365-2966

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