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Ultraluminous infrared galaxies: Starburst vs. AGN

Abstract:
We have obtained ISOPHOT-S low resolution mid-infrared spectra of a sample of 60 Ultraluminous Infrared Galaxies (ULIRGs). We use the strength of the 'PAH' mid-infrared features as a discriminator between starburst and AGN activity, and to probe for evolutionary effects. Observed ratios of PAH features in ULIRGs differ slightly from those in lower luminosity starbursts. We suggest that such PAH ratio changes relate to the conditions in the interstellar medium in these galaxies, and in particular to extinction. (C)1999 COSPAR. Published by Elsevier Science Ltd.
Publication status:
Published

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Publisher copy:
10.1016/S0273-1177(99)00248-3

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author


Journal:
AGN/NORMAL GALAXY CONNECTION More from this journal
Volume:
23
Issue:
5/6
Pages:
1061-1064
Publication date:
1999-01-01
Event title:
E1 2 Symposium of COSPAR Scientific Commission zE on the AGN/Normal Galaxy Connection, 32nd COSPAR Scientific Assembly
DOI:
ISSN:
0273-1177


Pubs id:
pubs:27843
UUID:
uuid:d8bcd0d4-e21f-48b4-a7ce-41ae02db0528
Local pid:
pubs:27843
Source identifiers:
27843
Deposit date:
2012-12-19

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