Anchoring the distance scale VIA X-ray/infrared data for Cepheid clusters: SU Cas

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DOIResolve DOI: http://doi.org/10.1088/0004-637X/753/2/144
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TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume753
Issue2
Article number144
AbstractNew X-ray (XMM-Newton) and JHK s (Observatoire du Mont-Mégantic) observations for members of the star cluster Alessi 95, which Turner etal. discovered hosts the classical Cepheid SU Cas, were used in tandem with UCAC3 (proper motion) and Two Micron All Sky Survey observations to determine precise cluster parameters: E(J - H) = 0.08 ± 0.02 and d = 405 ± 15 pc. The ensuing consensus among cluster, pulsation, and trigonometric distances (d=414±5((σx)±10((σ) pc) places SU Cas in a select group of nearby fundamental Cepheid calibrators (δ Cep, ζ Gem). High-resolution X-ray observations may be employed to expand that sample as the data proved pertinent for identifying numerous stars associated with SU Cas. Acquiring X-ray observations of additional fields may foster efforts to refine Cepheid calibrations used to constrain H 0.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270246
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Record identifier96c7c9a1-6f64-4400-9420-0d16838c30d1
Record created2014-01-16
Record modified2016-05-09
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