Microjansky source counts and spectral indices at 8.44 GHz

Details Microjansky source counts and spectral indices at 8.44 GHz Microjansky source counts and spectral indices at 8.44 GHz

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..498w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 2, p. 498-517.

Astronomy and Astrophysics

Astronomy

154

Astronomical Catalogs, Galactic Radio Waves, Microwaves, Radiant Flux Density, Radio Astronomy, Radio Sources (Astronomy), Background Radiation, Red Shift, Size (Dimensions), Slopes, Star Formation, Starburst Galaxies, Synchrotron Radiation

Scientific paper

Deep images were made with 10 arcsec resolution at 8.44 GHz with microjansky sensitivity of two regions previously imaged at several lower frequencies. The differential microjansky source count fits a power-law distribution with slope 2.3 +/- 0.2. This slope is roughly constant between 1.41 and 8.44 GHz and between S(v) = about 4 and X(v) = 1000 microJy. Unless the majority of radio sources at microJy levels are local, their average luminosity and/or space density probably has evolved with cosmic epoch in order to sustain the steep and nearly Euclidean value of the slope over such a large range in flux density. The 8.44 GHz counts probably converge at less than the 1 microjansky level if the evolutionary properties of these weak sources are similar to those of luminous gE radio galaxies and quasars. The median angular size of sources detected at 8.44 GHz at microjansky levels is 2.6 +/- 1.4 arcsec, and 40 percent of the source are larger than 5 arcsec.

Affiliated with

Also associated with

No associations

Rating

Microjansky source counts and spectral indices at 8.44 GHz 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 Microjansky source counts and spectral indices at 8.44 GHz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microjansky source counts and spectral indices at 8.44 GHz will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1442098