Issue |
A&A
Volume 465, Number 3, April III 2007
|
|
---|---|---|
Page(s) | 907 - 911 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20066935 | |
Published online | 05 February 2007 |
Discovery of a new faint radio SNR G108.2-0.6
1
National Astronomical Observatories, CAS, Beijing 100012, PR China e-mail: wtian@ucalgary.ca
2
Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
3
Department of Physics & Astronomy, Brandon University, Brandon, Manitoba R7A 6A9, Canada
Received:
14
December
2006
Accepted:
23
January
2007
A new faint and large shell-type radio Supernova Remnant (SNR)
G108.2-0.6 has been discovered in the Canadian Galactic Plane Survey (CGPS).
The SNR shows an elliptical shell-type structure at 1420 MHz, and has a
408–1420 MHz TT-plot spectral index of α= -0.5±0.1 (ν
), typical of a shell-type SNR. The remnant's flux density
at 1420 MHz is 6.6±0.7 Jy, and at 408 MHz is 11.5±1.2 Jy. Both of these
are corrected for compact sources. An integrated spectral index of -0.45±0.13 is determined. This new SNR has among the lowest surface brightness of any
known remnants (
= 2.4
10-22 W m-2 Hz-1 sr-1). 21 cm Stokes Q and U CGPS data (plus preliminary Effelsberg
Q and U maps) show some suggestive features that correlate with total power.
observations show structures associated with G108.2-0.6 in the radial velocity range -53 to
-58 km s-1, and indicate it is located in the Perseus arm
shock at a distance of 3.2±0.6 kpc. At this distance the diameter of
G108.2-0.6 is 58 pc.
IRAS maps (12, 25, 60 and 100 μm) of the new SNR show rich infrared emission surrounding G108.2-0.6.
Key words: ISM: supernova remnants
© ESO, 2007
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