Documentation scienceplus.abes.fr version Bêta

À propos de : Two supernova remnants of low radio surface brightness discovered in the Canadian Galactic Plane Survey        

AttributsValeurs
type
Is Part Of
Subject
Title
  • Two supernova remnants of low radio surface brightness discovered in the Canadian Galactic Plane Survey
Date
has manifestation of work
related by
Author
Abstract
  • Two new supernova remnants (SNRs), G85.4+0.7 and G85.9-0.6, superimposed on the radio source W 80, have been discovered in the radio continuum data from the Canadian Galactic Plane Survey(CGPS). Both SNRs consist of a thin incomplete radio shell surrounding a weak, extended X-ray source. G85.4+0.7 has a thin non-thermal shell of diameter ≈$0.4^\circ$ lying within a thermal shell whose diameter is ≈$0.6^\circ$. Its radio surface brightness at 1 GHz is $\Sigma_{1 \rm GHz} \le 1\times 10^{-22}$ Watt m -2 Hz -1 sr -1. It is located within a large H i bubble, whose systemic velocity, v $_{\rm LSR} = -12$ km s -1, implies a distance of 3.8 kpc. Two B1 stars detected within this bubble are most likely part of the OB association which formed it. The diameter of the H i bubble is about 100 pc. The SNR has a diameter of about 30 pc and probably is the result of a type II explosion of an early B star ≈ 6300 years ago. G85.9-0.6 has a radio surface brightness of $\Sigma_{1 \rm GHz} \le 2\times 10^{-22}$ Watt m -2 Hz -1 sr -1. No H i features corresponding to the SNR have been detected. This, and the low radio and X-ray brightnesses, suggest expansion in a low-density medium. The SNR may lie in the low-density region between the local and Perseus spiral arms, at a distance of about 5 kpc. Its diameter would then be ~35 pc.
article type
publisher identifier
  • aa1235
Date Copyrighted
Rights
  • © ESO, 2001
Rights Holder
  • ESO
is part of this journal
is primary topic of



Alternative Linked Data Documents: ODE     Content Formats:       RDF       ODATA       Microdata