Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..32a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. L32-L35.
Astronomy and Astrophysics
Astronomy
10
Interstellar Matter, Shock Waves, Supernova Remnants, X Ray Sources, X Ray Spectroscopy, Astronomical Spectroscopy, Rosat Mission, Sky Surveys (Astronomy), X Ray Imagery, X Ray Spectra
Scientific paper
Soft X-ray emission has been detected from the supernova remnant G18.95 - 1.1 during the Rosat all-sky survey. The X-ray remnant appears as a partial shell of about 33 arcmin diameter with some central enhancement. The X-ray spectrum has been modeled with a thermal line spectrum of kT = 0.434 keV and interstellar absorption equivalent to N(H) = 3.4 x 10 to the 21st/sq cm. The value of N(H) is consistent with a distance of the source of 2 kpc, which has been dervied earlier from H I-21-cm line measurements. At this distance the total luminosity is about 1.3 x 10 to the 34th erg/s between 0.1 and 2.4 keV. The Sedov analysis shows that the progenitor star exploded about 2000 - 6000 years ago, and that the remnant is expanding into a low-density medium. Arguments are given that the low density did not pre-exist but was possibly created by the stellar wind of the progenitor star. Based on radio observations G18.95 - 1.1 has been suggested to be one of the rare examples of composite supernova remnants. The present X-ray observations provide only an upper limit for the luminosity of 1.3 x 10 to the 33rd erg/s for a center-filling component.
Aschenbach Bernd
Brinkmann Wolfgang
Fuerst Ernst
Pfeffermann Elmar
Reich Wolfgang
No associations
LandOfFree
Observation of soft X-ray emission from the supernova remnant G18.95 - 1.1 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 Observation of soft X-ray emission from the supernova remnant G18.95 - 1.1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of soft X-ray emission from the supernova remnant G18.95 - 1.1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1277819