|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'500'096
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Constraining the Progenitor Companion of the Nearby Type Ia SN 2011fe with a Kiloday Nebular Spectrum | | Melissa L. Graham
; Peter E. Nugent
; Mark Sullivan
; Alexei V. Filippenko
; S. Bradley Cenko
; Jeffrey M. Silverman
; Kelsey I. Clubb
; Weikang Zheng
; | | Date: |
26 Jan 2015 | | Abstract: | We present a "kiloday" optical nebular spectrum of the nearby Type Ia
supernova (SN) 2011fe, obtained +981 days after explosion. SN 2011fe exhibits
little evolution since the +593 day optical spectrum, but there are several
curious aspects in this new extremely late-time regime. We see new emission
features at 5800 and 6400 AA that could be attributed to [Fe I], but also
consider (and reject) the possibility that the latter is the high-velocity
hydrogen predicted by Mazzali et al. (2014). The nebular feature at 5200 AA
exhibits a linear velocity evolution of $sim350$ $
m km s^{-1}$ per 100 days
from at least +220 to +980 days, but the line’s shape also changes in this
time, suggesting that line blending contributes to the evolution. At $sim
1000$ days after explosion, flux from the SN has declined to a point where
contribution from a hot, luminous secondary could be detected. In this work we
make the first observational tests for a post-impact remnant star and constrain
its luminosity to $<(3-5) imes 10^3$ $
m L_{odot}$. Additionally, we do not
see any evidence for narrow H$alpha$ emission, placing an upper limit of $3
imes 10^{-4}$ $
m M_{odot}$ on the mass of hydrogen in the system. We
conclude that observations continue to strongly exclude many single-degenerate
scenarios for SN 2011fe. | | Source: | arXiv, 1502.0646 | | 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