| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
25 April 2024 |
|
| | | |
|
Article overview
| |
|
How is really decelerating the expansion of SN1993J? | J.M. Marcaide
; A. Alberdi
; M.A. Perez-Torres
; J.C. Guirado
; L. Lara
; E. Ros
; P.J. Diamond
; F. Mantovani
; I.I. Shapiro
; K.W. Weiler
; R.A. Preston
; R.T. Schilizzi
; R.A. Sramek
; C. Trigilio
; S.D. Van Dyk
; A.R. Whitney . ( U. Valencia
; IAA/CSIC
; IRA/CNR-Bologna
; U. Granada
; MPIfR
; MERLIN
; Harvard-CfA
; NRL
; JPL/NASA
; JIVE
; NRAO
; IRA/CNR-Noto
; IPAC
; | Date: |
1 Jul 2002 | Subject: | astro-ph | Affiliation: | 2,4), E. Ros , P.J. Diamond , F. Mantovani , I.I. Shapiro , K.W. Weiler , R.A. Preston , R.T. Schilizzi (10), R.A. Sramek (11), C. Trigilio (12), S.D. Van Dyk (13), A.R. Whitney (14). ( U. Valencia, IAA/CSIC, IRA/CNR-Bologna, U. Granada, MPIfR, M | Abstract: | SN1993J is to date the radio supernova whose evolution has been monitored in greatest detail and the one which holds best promise for a comprehensive theoretical-observational analysis. The shell-like radio structure of SN1993J has expanded in general accord with models of shock excited emission, showing almost circular symmetry for over 8 years, except for a bright feature at the south-eastern region of the shell that has been observed at every epoch. The spectrum of SN1993J has flattened from alpha =-1 to alpha =-0.67 (S_(
u) propto nu**(alpha)). The decelerated expansion can be modeled well with a single slope but apparently better with two slopes. There are also intriguing hints of structure in the expansion curve. The results by the two VLBI groups carrying out this research show general agreement, but also some differences. A comparison of the optical and VLBI results about the details of the deceleration show some discrepancies. | Source: | arXiv, astro-ph/0207027 | 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:
| |