|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Time Dilation from Spectral Feature Age Measurements of Type Ia Supernovae | | A. G. Riess
; A. V. Filippenko
; D. C. Leonard
; B. P. Schmidt
; N. Suntzeff
; M. M. Phillips
; R. Schommer
; A. Clocchiatti
; R. P. Kirshner
; P. Garnavich
; P. Challis
; B. Leibundgut
; J. Spyromilio
; R. C. Smith
; | | Date: |
24 Jul 1997 | | Journal: | Astron.J. 114 (1997) 722 | | Subject: | astro-ph | | Affiliation: | UCB), A. V. Filippenko (UCB), D. C. Leonard(UCB), B. P. Schmidt (MSSO), N. Suntzeff (CTIO), M. M. Phillips (CTIO), R. Schommer (CTIO), A. Clocchiatti,(CTIO) R. P. Kirshner (Cfa), P. Garnavich (Cfa), P. Challis (Cfa), B. Leibundgut (ESO), J. Spyromilio | | Abstract: | We have developed a quantitative, empirical method for estimating the age of Type Ia supernovae (SNe Ia) from a single spectral epoch. The technique examines the goodness of fit of spectral features as a function of the temporal evolution of a large database of SNe Ia spectral features. When a SN Ia spectrum with good signal-to-noise ratio over the rest frame range 3800 to 6800 A is available, the precision of a spectral feature age (SFA) is (1-sigma) ~ 1.4 days. SFA estimates are made for two spectral epochs of SN 1996bj (z=0.574) to measure the rate of aging at high redshift. In the 10.05 days which elapsed between spectral observations, SN 1996bj aged 3.35 $pm$ 3.2 days, consistent with the 6.38 days of aging expected in an expanding Universe and inconsistent with no time dilation at the 96.4 % confidence level. The precision to which individual features constrain the supernova age has implications for the source of inhomogeneities among SNe Ia. | | Source: | arXiv, astro-ph/9707260 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER