Anchors for the cosmic distance scale: the Cepheids U Sagittarii, CF Cassiopeiae, and CEab Cassiopeiae

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1051/0004-6361/201322670
Author	Search for: Majaess, D.; Search for: Carraro, G.; Search for: Moni Bidin, C.; Search for: Bonatto, C.; Search for: Berdnikov, L.; Search for: Balam, D.¹; Search for: Moyano, M.; Search for: Gallo, L.; Search for: Turner, D.; Search for: Lane, D.; Search for: Gieren, W.; Search for: Borissova, J.; Search for: Kovtyukh, V.; Search for: Beletsky, Y.
Affiliation	National Research Council of Canada. National Science Infrastructure
Format	Text, Article
Subject	Distance scale; Hertzsprung-Russell and C-M diagrams; Multiband analysis; Star clusters; Stars: variables: Cepheids; Visual binaries
Abstract	New and existing X-ray, UBVJHKsW(1 - 4), and spectroscopic observations were analyzed to constrain fundamental parameters for M 25, NGC 7790, and dust along their sight-lines. The star clusters are of particular importance because they host the classical Cepheids U Sgr, CF Cas, and the visual binary Cepheids CEa and CEb Cas. Precise results from the multiband analysis, in tandem with a comprehensive determination of the Cepheids' period evolution (dP/dt) from ~140 years of observations, helped to resolve concerns raised regarding the clusters and their key Cepheid constituents. Specifically, the distances derived for members of M 25 and NGC 7790 are 630 ± 25 pc and 3.40 ± 0.15 kpc, respectively.
Publication date	2013-11-29
In	Astronomy and Astrophysics 560, A22 (29 November 2013).
Language	English
Peer reviewed	Yes
NPARC number	21270974
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Record identifier	fffdf83f-efeb-4343-9f37-814c11e373f9
Record created	2014-02-18
Record modified	2020-04-22

Date modified:: 2024-04-19