Discovery of the host cluster for the fundamental Cepheid calibrator zeta Geminorum

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/748/1/L9
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume748
Issue1
Article numberL9
AbstractNew and existing CORAVEL, UBVJHKs, HST, HIP/Tycho, ARO, KPNO, and DAO observations imply that the fundamental Cepheid calibrator ζ Gem is a cluster member. The following parameters were inferred for ζGem from cluster membership and are tied to new spectral classifications (DAO) established for 26 nearby stars (e.g., HD53588/B7.5IV, HD54692/B9.5IV): E B-V = 0.02 ± 0.02, log τ = 7.85 ± 0.15, and d = 355 ± 15 pc. The mean distance to ζ Gem from cluster membership and six recent estimates (e.g., IRSB) is d=363 ± 9(σx)±26(σ) pc. The results presented here support the color-excess and HST parallax derived for the Cepheid by Benedict et al. Forthcoming precise proper motions (DASCH) and Chandra/XMM-Newton observations of the broader field may be employed to identify cluster members, bolster the cluster's existence, and provide stronger constraints on the Cepheid's fundamental parameters. © 2012. The American Astronomical Society. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number21270252
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Record identifier348da5c9-c950-42d4-bc90-f15ac176676a
Record created2014-01-16
Record modified2016-07-18
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