新利18体育新

 首页 Home  |  新利体育客户端网址  |  人员 People  |  科学研究 Science  |  科研平台 Platform  |  新利18最新体育娱乐  |  人才培养 Education  |  国际合作 Collaborations  |  科学普及 Outreach  |  诚聘英才 Recruitment  |  访问指南 For Visitors 
 
 首页 Home 
 新利体育客户端网址 
 人员 People 
 科学研究 Science 
 新利18最新体育娱乐 
 人才培养 Education 
 科学普及 Outreach 
 诚聘英才 Recruitment 
 访问指南 For Visitors 
 内部链接 Internal 
 
  过往活动 Past Events
当前位置: 首页 Home>>过往活动 Past Events>>正文
 

Lunch talk on Jun. 14, 2023

Grids of Wolf-Rayet Stars Using MESA with the k-omega Model: From 25 to 120 M_sun at Z = 0.02


Speaker: Zhi Li (YNO)

Venue: SWIFAR Building 2111

Time: 12:30 PM, Wednesday, Jun. 14, 2023

Abstract: 

To explore overshoot mixing and rotational mixing beyond the convective core during the core He-burning phase in massive stars, we computed a grid of stellar models with the k-omega model, both rotating and non-rotating, at Z = 0.02, covering a mass range of 25 to 120 M⊙. The rotating models start on the zero-age main-sequence with a rotation rate v_ini/v_crit = 0.4, and the evolution is computed until the end of the central carbon-burning phase. Models with the k-omega model provide larger convective cores and a broadening of the main-sequence width. The final masses of the WR stars ranging from 9.5-17.5 M⊙ and 10-23 M⊙ for the rotating and non-rotating models, respectively. In the rotating models, the C/N ratio decrease slowly below 0.1 outside the convective core, resulting in a flatter element transition region. In addition, the lifetimes of WNC phase are (1-4)×10^4 yr, which is about one order of magnitude longer than the non-rotating models. The expected WNC/WR ratios are 0.059 and 0.004 for the rotating and non-rotating models respectively.

关闭窗口

版权所有:新利18体育新 

新利体育平台怎么样

Baidu
map