Ultraluminous IRAS galaxies as seen with ISO

Details Ultraluminous IRAS galaxies as seen with ISO Ultraluminous IRAS galaxies as seen with ISO

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..833r&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 833

Physics

5

Starbursts, Ultraluminous Galaxies, Mergers

Scientific paper

We review the results of a major spectroscopic survey of nearby Starbursts and moderate redshift Ultraluminous IRAS Galaxies (ULIRGs) using ISO-SWS, ISOPHOT-S and ISOCAM (CVF) on board ISO. Detailed modeling reveals that massive stars, Mupper >= 100 Modot are formed in most Starbursts in relatively short bursts (one or a few O star lifetimes). In the area of ULIRGs we address the main question of the dominant energy source as well as their evolution. We have found that the combination of mid-infrared fine structure line ratio with the strength of the PAH feature provides an excellent tool for discriminating between starburst and AGN activity. Our studies indicate that, on average, ULIRGs are mainly powered by Starbursts. The strength of the PAH feature is also used to probe for evolutionary effects. We find no evidence that ULIRGs found in advanced stages of merging are more AGN-like, as postulated by the classical evolutionary scenario. We suggest that local conditions (related to the energetics of the AGN) determine the dominance of the starburst or AGN.

Affiliated with

Also associated with

No associations

Rating

Ultraluminous IRAS galaxies as seen with ISO 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 Ultraluminous IRAS galaxies as seen with ISO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraluminous IRAS galaxies as seen with ISO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1447452