A Deep, High-Resolution Survey at 74 MHz

Details A Deep, High-Resolution Survey at 74 MHz A Deep, High-Resolution Survey at 74 MHz

2003-10-18

arxiv.org/abs/astro-ph/0310521v1

Astronomy and Astrophysics

Astrophysics

31 pages, 11 figures, accepted for publication in ApJS

Scientific paper

10.1086/380783

We present a 74 MHz survey of a 165 square degree region located near the north galactic pole. This survey has an unprecedented combination of both resolution (25'' FWHM) and sensitivity (RMS noise as low as 24 mJy/beam). We detect 949 sources at the 5-sigma level in this region, enough to begin exploring the nature of the 74 MHz source population. We present differential source counts, spectral index measurements and the size distribution as determined from counterparts in the high resolution FIRST 1.4 GHz survey. We find a trend of steeper spectral indices for the brighter sources. Further, there is a clear correlation between spectral index and median source size, with the flat spectrum sources being much smaller on average. Ultra-steep spectrum objects (alpha < -1.2) are identified, and we present high resolution VLA follow-up observations of these sources which, identified at such a low frequency, are excellent candidates for high redshift radio galaxies.

Affiliated with

Also associated with

No associations

Rating

A Deep, High-Resolution Survey at 74 MHz 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 Deep, High-Resolution Survey at 74 MHz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Deep, High-Resolution Survey at 74 MHz will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-486265