Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction

Details Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction

2011-06-07

arxiv.org/abs/1106.1469v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, MNRAS Letters in press

Scientific paper

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 Na I D 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 Na I D, that the two barely correlate. We briefly examine the causes for this large scatter that effectively prevents one from inferring extinction using this method.

Affiliated with

Also associated with

No associations

Rating

Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-Resolution Sodium D Absorption is a Bad Proxy for Extinction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-319755