云南大学中国西南天文研究所

 首页 Home | 研究所简介 SWIFAR | 人员 People | 科学研究 Science | 科研设备 Facilities | 学术活动 Activities | 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 
 研究所简介 SWIFAR 
 人员 People 
 科学研究 Science 
 学术活动 Activities 
 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 Oct. 19, 2022

Multicomponent models of the interstellar medium in low-metallicity dwarf galaxies


Speaker: Lise Ramambason (CEA)

Venue: Video Conference

Time: 12:30 PM, Wednesday, Oct. 19, 2022

Abstract: 

I will present a new modeling framework MULTIGRIS (Lebouteiller & Ramambason 2022) based on Bayesian statistics, which is well-adapted to study the multiphase interstellar medium (ISM), including and especially within low-metallicity galaxies. In such chemically unevolved environments, important changes of the gas heating and cooling mechanisms are expected, with an impact on the resulting spectral signatures. We intend to use those spectral signatures as probes of the physical conditions in low-metallicity dwarf galaxies, which may resemble the conditions expected in the early universe. In particular, we can infer quantities such as the escape fraction of ionizing photons from HII regions or the gas mass distribution in different ISM phases, including the so-called « CO-dark » phase. Tools like MULTIGRIS may help gain insights into the complex mechanisms at play in the first galaxies that formed within the Reionization epoch and open promising opportunities for future applications, including for high-redshift galaxies, with the already available and future detections from ALMA and JWST.

关闭窗口

版权所有:云南大学中国西南天文研究所 

South-Western Institute For Astronomy Research, YNU