Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-06
Mon.Not.Roy.Astron.Soc. 330 (2002) 772
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS, 7 pages, 1 figure
Scientific paper
10.1046/j.1365-8711.2002.05130.x
We have made a deep search for radio emission from all the northern hemisphere supersoft X-ray sources using the VLA and MERLIN telescopes, at 5 and 8.4 GHz. Three previously undetected sources: T Pyx, V1974 Cygni and RX J0019.8+2156 were imaged in quiescence using the VLA in order to search for any persistent emission. No radio emission was detected in any of the VLA fields down to a typical 1 sigma RMS noise of 20 uJy/beam, however, 17 new point sources were detected in the fields with 5 GHz fluxes between 100 and 1500 uJy giving an average 100 uJy-source density of around 200 per square degree, comparable to what was found in the MERLIN HDF survey. The persistent source AG Draconis was observed by MERLIN to provide a confirmation of previous VLA observations and to investigate the source at a higher resolution. The core is resolved at the milliarcsec scale into two components which have a combined flux of around 1 mJy. It is possible that we are detecting nebulosity which is becoming resolved out by the higher MERLIN resolution. We have investigated possible causes of radio emission from a wind environment, both directly from the secondary star, and also as a consequence of the high X-ray luminosity from the white dwarf. There is an order of magnitude discrepancy between observed and modelled values which can be explained by the uncertainty in fundamental quantities within these systems.
Chaty Sylvain
Crocker Matthew
Eyres S. P. S.
Kenworthy Matthew A.
Ogley Richard N.
No associations
LandOfFree
A search for radio emission from Galactic supersoft X-ray sources 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 A search for radio emission from Galactic supersoft X-ray sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for radio emission from Galactic supersoft X-ray sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-433579