Issue |
A&A
Volume 451, Number 1, May III 2006
|
|
---|---|---|
Page(s) | 251 - 257 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20054661 | |
Published online | 25 April 2006 |
Radio observations and spectrum of the SNR G127.1+0.5 and its central source 0125+628
1
Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada e-mail: wtian@ucalgary.ca; leahy@iras.ucalgary.ca
2
National Astronomical Observatories, CAS, Beijing 100012, PR China
Received:
7
December
2005
Accepted:
23
January
2006
We present new images of the Supernova Remnant (SNR) G127.1+0.5 (R5), based on the 408 MHz and 1420 MHz continuum emission and the HI-line emission data of the Canadian Galactic Plane Survey (CGPS). The radio spectrum of the central compact source (0125+628) is analyzed in
the range 178 MHz–8.7 GHz, indicating a flat spectrum with synchrotron self-absorption below 800 MHz. The SNR's flux density at 408 MHz is 17.1 ± 1.7 Jy and at 1420 MHz is 10.0 ± 0.8 Jy, corrected for flux densities from compact sources within the SNR.
The SNR's integrated flux density based spectral index (
ν
) is 0.43 ± 0.10. The respective T-T plot spectral index (derived from the relative size of brightness temperature variations between two frequencies, see text for details) is 0.46 ± 0.01. There is no evidence at 1σ for spatial variations in spectral index within G127.1+0.5. In particular, we compared the northern shell, southern shell and central diffuse region. HI observations show structures associated with the SNR in the radial velocity range of -12 to -16 km s-1, suggesting G127.1+0.5's distance is 1.15 kpc. The estimated Sedov age
is 2–3
104 yr.
Key words: ISM: lines and bands / ISM: supernova remnants / Galaxy: evolution
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.