Apex determination and detection of stellar clumps in the open cluster M 67
نویسندگان
چکیده
منابع مشابه
Photometric variability in the old open cluster M 67 ⋆ II .
We use differential CCD photometry to search for variability in BV I among 990 stars projected in and around the old open cluster M67. In a previous paper we reported results for 22 cluster members that are optical counterparts to X-ray sources; this study focuses on the other stars in our observations. A variety of sampling rates were employed, allowing variability on time scales ranging from ...
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We present the results of a 47-ks Chandra-ACIS observation of the old open cluster M67. We detected 25 proper-motion cluster members (including ten new sources) and 12 sources (all new) that we suspect to be members from their locations close to the main sequence (1<B–V <1.7). Of the detected members, 23 are binaries. Among the new sources that are members and probable members are four spectros...
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We study photometric variability among the optical counterparts of X-ray sources in the old open cluster M67. The two puzzling binaries below the giant branch are both variables: for S 1113 the photometric period is compatible with the orbital period, S 1063 either varies on a period longer than the orbital period, or does not vary periodically. For the spectroscopic binaries S 999, S 1070 and ...
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We report a comprehensive light element (Li, C, N, O, Na, Mg, and Al) abundance analysis of three solar-type main sequence (MS) dwarfs and three red giant branch (RGB) clump stars in the Hyades open cluster using highresolution and high signal-to-noise spectroscopy. The abundances have been derived in a self-consistent fashion, and for each group (MS or RGB), the CNO abundances are found to be ...
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ژورنال
عنوان ژورنال: New Astronomy
سال: 2014
ISSN: 1384-1076
DOI: 10.1016/j.newast.2014.02.008