2007/06/25 by Liu Liang, Liang Liu, S. Qian +9
Earth and Planetary Sciences · Physics and Astronomy · #Angular momentum #Arithmetic #Astrophysics #Astrophysics and Star Formation Studies #Atmospheric Ozone and Climate #Binary number #Binary star #Binary system #Cluster (spacecraft) #Contact binary #Light curve #Open cluster #Operating system #Oscillation (cell signaling) #Physics #Stars #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.1093/pasj/59.3.607
published as PASJ: Publ. Astron. Soc. Japan 59, 607-614, 2007 June 25
openalex publication_date 2007/06/25 · arxiv created 2011/03/10 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract TX Cnc is a member of the young open cluster NGC2632. In the present paper, four CCD epochs of light minimum and a complete V light curve of TX Cnc are presented. A period investigation based on all available photoelectric or CCD data showed that it is superimposed on a long-term increase (dP/dt=+3.97×10-8d yr-1), and weak evidence suggests that it includes a small-amplitude period oscillation (A3=0\rlap.\rm d 0028; T3=26.6yr). The light curves in the V band obtained in 2004 were analyzed with the 2003 version of the W-D code. It was shown that TX Cnc is an overcontact binary system with a degree of contact factor f=24.8% (±0.9%). The absolute parameters of the system were calculated: M1=1.319±0.007M\odot, M2=0.600±0.01M\odot; R1=1.28±0.19R\odot, R2=0.91±0.13R\odot. TX Cnc may be on the TRO-controlled stage of the evolutionary scheme proposed by Qian (2001a, b, 2003a), and may contain an invisible tertiary component (m3≈0.097M\odot). If this is true, the tertiary component has played an important role in the formation and evolution of TX Cnc by removing angular momentum from the central system (Pribulla & Rucinski 2006). In this way the contact binary configuration can be formed in the shortlife time of a young open cluster via AML.