Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001acasn..42..408s&link_type=abstract
Acta Astronomica Sinica, vol.42, no.4, p. 408-413
Astronomy and Astrophysics
Astronomy
Iras Galaxies- Radio Spectrum, Iras Galaxies- Radio Spectrum
Scientific paper
An IRAS galaxy sample with infrared luminosity high up to 1011.8 to 1012.8 L? was observed using the Australia Compact Array (ATCA) at 8.6, 4.8, 2.4 and 1.4 GHz. The 4 galaxies in the sample are found to be steep spectra at high frequencies and decreasing flux densities at relatively low frequencies. Their spectra show a peak-like pattern with the peak flux at several GHz. Two possible mechanisms for the turning down over in the low-frequency side, synchrotron self-absorption and free-free absorption, are discussed. From the analysis of the spectra of 00199-7426, 02587-6336, 07020-5423 and 21547-5823, we conclude that free-free absorption may cause the low-frequency turnover. By the model fitting to the observations, we obtain some related parameters of these sources.
Fu H. W.
Gao Ying-Fang
Li Shi-Yan
Su Bu-Mei
No associations
LandOfFree
Radio spectra of several ultra-luminous IRAS galaxies 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 Radio spectra of several ultra-luminous IRAS galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio spectra of several ultra-luminous IRAS galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1233833