Spectroscopic follow-up of FIRBACK-South-Marano bright galaxies

Details Spectroscopic follow-up of FIRBACK-South-Marano bright galaxies Spectroscopic follow-up of FIRBACK-South-Marano bright galaxies

2003-12-23

arxiv.org/abs/astro-ph/0312598v1

Astron.Astrophys. 412 (2003) 349

Astronomy and Astrophysics

Astrophysics

16 pages + 9 figures (Figs 1, 8 and 9 too big to be included) Accepted in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20031427

We present optical spectroscopy of the brightest 170 microns sources in the FIRBACK South Marano (FSM) field. The survey is 90% complete at the 4 sigma level. The spectra are compared with those of a reference sample of faint IRAS (60 microns selected) sources observed in the same conditions . The galaxies in both samples are characterized by a predominance of emission-line spectra and moderate IR luminosities (10E10.5 < L_IR < 10E12 L_Sun). The fraction of AGN's is low (about 15%) and the majority of sources are nearby (z<0.3), dusty, star forming galaxies, with moderate star formation rates (a few 10 solar masses per year). The infrared emission of the FSM galaxies shows also a colder spectral energy distribution than was expected. The galaxies in both samples (IRAS faint sources and FSM) are essentially undistinguishable with the available data, and seem to represent a population of closeby, cold, star forming galaxies rather neglected up to now. Although their contribution to the far-IR background seems to be low, they deserve a more detailed study on their own. The contribution of fainter, presumably more distant, galaxies to the far-IR background will be discussed when we will have completed the follow-up of the fainter part of this 170 microns survey. It seems however already clear that the fraction of closeby, cold galaxies is much larger than expected by the earlier models, at least down to the sensitivity achieved by this ISO survey.

Affiliated with

Also associated with

No associations

Rating

Spectroscopic follow-up of FIRBACK-South-Marano bright 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 Spectroscopic follow-up of FIRBACK-South-Marano bright galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic follow-up of FIRBACK-South-Marano bright galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-322724