Matches in SemOpenAlex for { <https://semopenalex.org/work/W1964320884> ?p ?o ?g. }
- W1964320884 endingPage "259" @default.
- W1964320884 startingPage "246" @default.
- W1964320884 abstract "We report the discovery of two spectroscopic binaries in the field of the old open cluster M67—S1063 and S1113—whose positions in the color-magnitude diagram place them ≈1 mag below the subgiant branch. A ROSAT study of M67 independently discovered these stars to be X-ray sources. Both have proper-motion membership probabilities greater than 97%; precise center-of-mass velocities are consistent with the cluster mean radial velocity. S1063 is also projected within one core radius of the cluster center. It is a single-lined binary with a period of 18.396 days and an orbital eccentricity of 0.206. S1113 is a double-lined system with a circular orbit having a period of 2.823094 days. The primary stars of both binaries are subgiants. The secondary of S1113 is likely a 0.9 M⊙ main-sequence star, which implies a 1.3 M⊙ primary star. We have been unable to explain securely the low apparent luminosities of the primary stars. The colors of S1063 suggest 0.15 mag higher reddening than found for either M67 or through the entire Galaxy in the direction of M67. S1063 could be explained as an extincted M67 subgiant, although the origin of such enhanced extinction is unknown. The photometric properties of S1113 are well modeled by a cluster binary with a 0.9 M⊙ main-sequence secondary star. However, the low composite luminosity requires a small (2.0 R⊙) primary star that would be supersynchronously rotating, in contrast to the short synchronization timescales, the circular orbit, and the periodic photometric variability with the orbital period. Geometric arguments based on a tidally relaxed system suggest a larger (4.0 R⊙) primary star in a background binary, but such a large star violates the observed flux ratio. Thus, we have not been able to find a compelling solution for the S1113 system. We speculate that S1063 and S1113 may be the products of close stellar encounters involving binaries in the cluster environment and may define alternative stellar evolutionary tracks associated with mass transfer episodes, mergers, and/or dynamical stellar exchanges." @default.
- W1964320884 created "2016-06-24" @default.
- W1964320884 creator A5022799398 @default.
- W1964320884 creator A5032293375 @default.
- W1964320884 creator A5065533813 @default.
- W1964320884 creator A5066163025 @default.
- W1964320884 creator A5077907915 @default.
- W1964320884 creator A5088359901 @default.
- W1964320884 date "2003-01-01" @default.
- W1964320884 modified "2023-10-16" @default.
- W1964320884 title "Sub-Subgiants in the Old Open Cluster M67?" @default.
- W1964320884 cites W1973287615 @default.
- W1964320884 cites W1979271265 @default.
- W1964320884 cites W1988033481 @default.
- W1964320884 cites W1989522864 @default.
- W1964320884 cites W1995382985 @default.
- W1964320884 cites W1999645097 @default.
- W1964320884 cites W1999894170 @default.
- W1964320884 cites W2001417160 @default.
- W1964320884 cites W2002062005 @default.
- W1964320884 cites W2006741581 @default.
- W1964320884 cites W2013955853 @default.
- W1964320884 cites W2019850909 @default.
- W1964320884 cites W2023725142 @default.
- W1964320884 cites W2026795906 @default.
- W1964320884 cites W2031645757 @default.
- W1964320884 cites W2041795555 @default.
- W1964320884 cites W2048373896 @default.
- W1964320884 cites W2051825590 @default.
- W1964320884 cites W2057444577 @default.
- W1964320884 cites W2066845791 @default.
- W1964320884 cites W2070560020 @default.
- W1964320884 cites W2078475344 @default.
- W1964320884 cites W2079139996 @default.
- W1964320884 cites W2101374458 @default.
- W1964320884 cites W2111817932 @default.
- W1964320884 cites W2111893888 @default.
- W1964320884 cites W2116712221 @default.
- W1964320884 cites W2117673689 @default.
- W1964320884 cites W2167635287 @default.
- W1964320884 cites W23927610 @default.
- W1964320884 cites W3098059653 @default.
- W1964320884 cites W3103719627 @default.
- W1964320884 cites W3104153708 @default.
- W1964320884 cites W4301708912 @default.
- W1964320884 doi "https://doi.org/10.1086/344944" @default.
- W1964320884 hasPublicationYear "2003" @default.
- W1964320884 type Work @default.
- W1964320884 sameAs 1964320884 @default.
- W1964320884 citedByCount "57" @default.
- W1964320884 countsByYear W19643208842012 @default.
- W1964320884 countsByYear W19643208842013 @default.
- W1964320884 countsByYear W19643208842014 @default.
- W1964320884 countsByYear W19643208842015 @default.
- W1964320884 countsByYear W19643208842016 @default.
- W1964320884 countsByYear W19643208842017 @default.
- W1964320884 countsByYear W19643208842018 @default.
- W1964320884 countsByYear W19643208842019 @default.
- W1964320884 countsByYear W19643208842020 @default.
- W1964320884 countsByYear W19643208842021 @default.
- W1964320884 countsByYear W19643208842022 @default.
- W1964320884 countsByYear W19643208842023 @default.
- W1964320884 crossrefType "journal-article" @default.
- W1964320884 hasAuthorship W1964320884A5022799398 @default.
- W1964320884 hasAuthorship W1964320884A5032293375 @default.
- W1964320884 hasAuthorship W1964320884A5065533813 @default.
- W1964320884 hasAuthorship W1964320884A5066163025 @default.
- W1964320884 hasAuthorship W1964320884A5077907915 @default.
- W1964320884 hasAuthorship W1964320884A5088359901 @default.
- W1964320884 hasBestOaLocation W19643208841 @default.
- W1964320884 hasConcept C113461152 @default.
- W1964320884 hasConcept C121332964 @default.
- W1964320884 hasConcept C125311221 @default.
- W1964320884 hasConcept C1276947 @default.
- W1964320884 hasConcept C150846664 @default.
- W1964320884 hasConcept C164546044 @default.
- W1964320884 hasConcept C168020605 @default.
- W1964320884 hasConcept C178075534 @default.
- W1964320884 hasConcept C2779513048 @default.
- W1964320884 hasConcept C44870925 @default.
- W1964320884 hasConcept C48393594 @default.
- W1964320884 hasConcept C52348108 @default.
- W1964320884 hasConcept C80518518 @default.
- W1964320884 hasConceptScore W1964320884C113461152 @default.
- W1964320884 hasConceptScore W1964320884C121332964 @default.
- W1964320884 hasConceptScore W1964320884C125311221 @default.
- W1964320884 hasConceptScore W1964320884C1276947 @default.
- W1964320884 hasConceptScore W1964320884C150846664 @default.
- W1964320884 hasConceptScore W1964320884C164546044 @default.
- W1964320884 hasConceptScore W1964320884C168020605 @default.
- W1964320884 hasConceptScore W1964320884C178075534 @default.
- W1964320884 hasConceptScore W1964320884C2779513048 @default.
- W1964320884 hasConceptScore W1964320884C44870925 @default.
- W1964320884 hasConceptScore W1964320884C48393594 @default.
- W1964320884 hasConceptScore W1964320884C52348108 @default.
- W1964320884 hasConceptScore W1964320884C80518518 @default.
- W1964320884 hasIssue "1" @default.
- W1964320884 hasLocation W19643208841 @default.