Rotational mixing in close binaries

摘要：

Rotational mixing a very important but uncertain process in the evolution of massive stars. We propose to use close binaries to test its efficiency. Based on rotating single stellar models we predict nitrogen surface enhancements for tidally locked binaries. Furthermore we demonstrate the possibility of a new evolutionary scenario for very massive (M > 40M☉) close (P < 3 days) binaries: Case M,in which mixing is so efficient that the stars evolve quasi chemically homogeneously,stay compact and avoid any Roche-lobe overflow,leading to very close (double) WR binaries.

关键词： stars:rotation binaries:close stars:Wolf-Rayet stars:abundances

作者: S.E.de Mink M.Cantiello N.Langer S.-Ch.Yoon I.Brott E.Glebbeek M.Verkoulen O.R.Pols

作者单位: Astronomical Institute Utrecht,Princetonplein 5,3584 CC Utrecht,The Netherlands Dep.of Astronomy & Astrophysics,Univ.of California,Santa Cruz,CA95064,USA

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 365-370

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）