DN Bootis: A low mass-ratio W UMa-type contact binary

✍ Scribed by H.V. Şenavcı; R.H. Nelson; İ. Özavcı; S.O. Selam; B. Albayrak

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 395 KB
• Volume: 13
• Category: Article
• ISSN: 1384-1076
• DOI: 10.1016/j.newast.2008.01.001

✦ Synopsis

New photoelectric BVR light curves and radial velocity curves were obtained for the HIPPARCOS discovery DN Boo at the TU ¨B_ ITAK 1 National Observatory of Turkey (TUG) and Dominion Astrophysical Observatory (DAO), respectively, to determine physical nature of the variable. The character of the obtained light curves and double-lined spectroscopic structures in the obtained spectra are revealed that DN Boo is a genuine EW type eclipsing binary. During the analysis of our new observations a simultaneous solution were derived for the photometric and spectroscopic data by using the Wilson-Devinney code and orbital parameters with absolute dimensions of the system were determined for the first time. Finally, the importance of very low mass-ratio contact binaries in the late stages of close binary evolution was discussed.