Evidence for Evolution or Bias in Host Extinctions of Type 1a Supernovae at High Redshift
Type la supernova magnitudes conventionally include an additive parameter called the extinction coefficient. We find that the extinction coefficients of a popular "gold" set are well correlated with the deviation of magnitudes from Hubble diagrams. If the effect is due to bias, extinctions...
Saved in:
Published in | The Astrophysical journal Vol. 637; no. 1; pp. 91 - 95 |
---|---|
Main Authors | , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
20.01.2006
|
Online Access | Get full text |
Cover
Loading…
Summary: | Type la supernova magnitudes conventionally include an additive parameter called the extinction coefficient. We find that the extinction coefficients of a popular "gold" set are well correlated with the deviation of magnitudes from Hubble diagrams. If the effect is due to bias, extinctions have been overestimated, which makes supernovas appear more dim. The statistical significance of the extinction-acceleration correlation has a random chance probability of less than one in a million. The hypothesis that extinction coefficients should be corrected empirically provides greatly improved fits to both accelerating and nonaccelerating models, with the independent feature of eliminating any significant correlation of residuals. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0004-637X 1538-4357 |
DOI: | 10.1086/498239 |