立博app

網站首頁 ?>?學術活動 ?>?學術報告
學術活動
學術報告
The complete sample and mass loss rate of red supergiants in M31 and M33
報告題目:The complete sample and mass loss rate of red supergiants in M31 and M33
報?告? 人:姜碧溈 教授(北京師范大學)
報告時間:2021-06-09 10:00:00
報告地點:天文樓212報告廳

摘要:

Red supergiants (RSGs) are massive Population I stars, the major progenitor of supernovae. With strong stellar wind, RSGs are an important source of interstellar dust, in particularly for the high redshift galaxies in the early universe when low-mass stars have not evolved to the asymptotic giant branch phase. However, the estimation of contribution of RSGs to interstellar dust suffers large uncertainty mainly because there is no complete sample of RSGs in any galaxy. This talk will present our recent work on building a complete sample of RSGs in M31 and M33 using a novel method based on the near-infrared color-color diagram to remove the foreground dwarf stars. Furthermore, the mass loss rate of RSGs and their whole contribution to the interstellar dust in M31 and M33 are calculated with the complete sample. Discussions on the potential exploration of the sample and the relation of mass loss rate with stellar parameters will be presented as well.


簡介:

姜碧溈,北京師范大學天文系教授。1989年畢業于北京師范大學天文系,1997年于日本綜合研究大學院大學獲得理學博士學位,一直從事星際介質和恒星天文學的研究。主要研究課題有:演化晚期恒星的星周氣體和塵埃,本星系群星系中的紅超巨星光變和質量流失率,從紅外到紫外的星際消光規律,超新星遺跡的消光和塵埃。

 


亚博网站登陆 亚博网站登陆 亚博网站登陆 亚博网站登陆 亚博网站登陆