The 10-1000 μm Spectral Energy Distributions of Ultra-luminous IR Galaxies
Abstract
ISOPHOT observations of the 10 - 200 μm spectral energy distributions of the 37 brightest ultra-luminous IR galaxies (ULIRGs, L_IR >= 10^12 L_odot) and 4 ULIRGs at higher redshift are presented. By recent SCUBA and SEST follow-up observations 450 and 850 μm photometry of 6 objects and 1300 μm detections of 2 objects were obtained, which doubled the number of ULIRGs with measured 10 - 1000 μm SEDs from 7 to 15. >From these SEDs fundamental parameters such as dust temperatures and dust masses are derived. In many ULIRGs large amounts of very cold dust were detected. In combination with optical and IR spectroscopic data we can draw conclusions on the nature of the major heating sources (AGN, starburst, interstellar radiation field) and their relative contribution to the total energy budget.
- Publication:
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Astronomische Gesellschaft Abstract Series
- Pub Date:
- 1999
- Bibcode:
- 1999AGAb...15...52K
- Keywords:
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- Infrared Galaxies: Energy Distribution