Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-12
JCAP 0706:002,2007
Astronomy and Astrophysics
Astrophysics
7 pages, 2 figures
Scientific paper
10.1088/1475-7516/2007/06/002
The flux from distant type Ia supernovae (SN) is likely to be amplified or de-amplified by gravitational lensing due to matter distributions along the line-of-sight. A gravitationally lensed SN would appear brighter or fainter than the average SN at a particular redshift. We estimate the magnification of 26 SNe in the GOODS fields and search for a correlation with the residual magnitudes of the SNe. The residual magnitude, i.e. the difference between observed and average magnitude predicted by the "concordance model" of the Universe, indicates the deviation in flux from the average SN. The linear correlation coefficient for this sample is r=0.29. For a similar, but uncorrelated sample, the probability of obtaining a correlation coefficient equal to or higher than this value is ~10%, i.e. a tentative detection of lensing at ~90% confidence level. Although the evidence for a correlation is weak, our result is in accordance with what could be expected given the small size of the sample.
Dahlen Tomas
Goobar Ariel
Jonsson Jakob
M"ortsell Edvard
Riess Adam
No associations
LandOfFree
Tentative detection of the gravitational magnification of type Ia supernovae 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 Tentative detection of the gravitational magnification of type Ia supernovae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tentative detection of the gravitational magnification of type Ia supernovae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-584439