The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant

Details The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant

2003-10-20

arxiv.org/abs/astro-ph/0310586v1

Astrophys.J. 598 (2003) L27-L30

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures. Accepted for publication in the Astrophysical Journal Letters

Scientific paper

10.1086/380557

We compare recent observations of the supernova remnant G11.2-0.3 taken with the VLA during 2001-02 with images from VLA archives (1984-85) to detect and measure the amount of expansion that has occurred during 17 years. The bright, circular outer shell shows a mean expansion of (0.71 +/- 0.15)% and (0.50 +/- 0.17)%, from 20- and 6-cm data, respectively, which corresponds to a rate of 0.057' +/- 0.012'/yr at 20 cm and 0.040' +/- 0.013'/yr at 6 cm. From this result, we estimate the age of the remnant to be roughly between 960 and 3400 years old, according to theoretical models of supernova evolution. This is highly inconsistent with the 24000 yr characteristic age of PSR J1811-1925, located at the remnant's center, but, rather, is consistent with the time since the historical supernova observed in 386 AD. We also predict that G11.2-0.3 is currently in a pre-Sedov evolutionary state, and set constraints on the distance to the remnant based on Chandra X-ray spectral results.

Affiliated with

Also associated with

No associations

Rating

The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant 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 The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Expansion of G11.2-0.3, a Radio Composite Supernova Remnant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-509413