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On Ca II Emission as an Indicator of the Age of Young Stars

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Song, Inseok; Zuckerman, B; Bessell, Michael

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Chromospheric emission in the Ca II H and K lines has often been used as an age diagnostic for solar mass stars. For 20 such stars with ages less than a few hundred megayears, we compare Ca II ages derived by Wright et al. with ages we derive based on a combination of lithium abundance, X-ray activity, and Galactic space motion. Typically, the Ca II ages are noticeably older than the lithium/X-ray ages, suggesting that a recalibration of the Ca II ages may be necessary.

dc.contributor.authorSong, Inseok
dc.contributor.authorZuckerman, B
dc.contributor.authorBessell, Michael
dc.date.accessioned2015-12-13T23:11:22Z
dc.date.available2015-12-13T23:11:22Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/87560
dc.description.abstractChromospheric emission in the Ca II H and K lines has often been used as an age diagnostic for solar mass stars. For 20 such stars with ages less than a few hundred megayears, we compare Ca II ages derived by Wright et al. with ages we derive based on a combination of lithium abundance, X-ray activity, and Galactic space motion. Typically, the Ca II ages are noticeably older than the lithium/X-ray ages, suggesting that a recalibration of the Ca II ages may be necessary.
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: Stars: activity; Stars: fundamental parameters
dc.titleOn Ca II Emission as an Indicator of the Age of Young Stars
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume614
dc.date.issued2004
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationMigratedxPub16904
local.type.statusPublished Version
local.contributor.affiliationSong, Inseok, Gemini Observatory
local.contributor.affiliationZuckerman, B, University of California
local.contributor.affiliationBessell, Michael, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.startpage125
local.bibliographicCitation.lastpage127
local.identifier.doi10.1086/425683
dc.date.updated2015-12-12T08:27:09Z
local.identifier.scopusID2-s2.0-10044296306
CollectionsANU Research Publications

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