期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 415, 期 1, 页码 L81-L84出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2011.01084.x
关键词
supernovae: general; dust, extinction; galaxies: ISM
资金
- NASA
- US National Science Foundation (NSF) [AST-0607485, AST-0908886]
- TABASGO Foundation
- US Department of Energy SciDAC [DE-FC02-06ER41453]
- US Department of Energy [DE-FG02-08ER41563]
Dust extinction is generally the least tractable systematic uncertainty in astronomy, and particularly in supernova science. Often in the past, studies have used the equivalent width of NaID absorption measured from low-resolution spectra as proxies for extinction, based on tentative correlations that were drawn from limited data sets. We show here, based on 443 low-resolution spectra of 172 Type Ia supernovae for which we have measured the dust extinction as well as the equivalent width of NaID, that the two barely correlate. We briefly examine the causes for this large scatter that effectively prevents one from inferring extinction using this method.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据