Collaborative Research: On the Road to the Supernova: LBVs, Hypergiants, and SN Impostors

合作研究：通往超新星之路：LBV、超巨星和 SN 冒名顶替者

基本信息

批准号：
1109394
负责人：
Roberta Humphreys
金额：
$ 47.44万
依托单位：
University of Minnesota-Twin Cities
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-08-01 至 2017-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109394&HistoricalAwards=false
关键词：
Collaborative Research Road Supernova LBVs

项目摘要

This award will fund a combined observational and theoretical study of luminous blue variables, which are massive stars experiencing strong mass loss and evolving to be red supergiants. They are widely believed to the progenitors of core-collapse supernovae, but many of these may not explode if the mass lost during their lifetimes is high enough. This team will conduct long-term observations of these variables in several nearby galaxies, in order to get an improved census of these objects, elucidate the mechanisms that may be responsible for giant eruptions, and to better understand the mechanism of mass loss and how stars evolve as they experience episodic (rather than steady) mass loss.Modern supernova surveys are finding a number objects in nearby galaxies which are not true supernovae, the "supernova impostors," which may be objects like eta Carinae that shed 10-20 times the mass of our Sun in a few years. The final stages of these most massive stars are important for a valid picture of stellar astrophysics and they are increasingly significant in cosmology. They are the likely progenitors of Gamma Ray Bursters used as cosmological probes, and many of the first stars in the universe are thought to have been very massive.

该奖项将资助发光蓝色变量的综合观察和理论研究，这些变量是巨大的恒星，经历了强烈的质量损失，并且不断发展为红色超级巨人。它们被广泛认为是核心爆发超新星的祖细胞，但是如果质量在其一生中损失足够高，则其中许多可能不会爆炸。 This team will conduct long-term observations of these variables in several nearby galaxies, in order to get an improved census of these objects, elucidate the mechanisms that may be responsible for giant eruptions, and to better understand the mechanism of mass loss and how stars evolve as they experience episodic (rather than steady) mass loss.Modern supernova surveys are finding a number objects in nearby galaxies which are not true supernovae, the “超新星冒名顶替者”，可能是像Eta Carinae这样的物体，几年来散发出我们太阳质量的10-20倍。这些最大的恒星的最后阶段对于恒星天体物理学的有效图片很重要，并且它们在宇宙学上越来越重要。它们是用作宇宙学探针的伽马射线囊的可能的祖细胞，宇宙中的许多第一批恒星都被认为非常庞大。