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ISO Spectroscopy of Ultraluminous Infrared Galaxies (1999)

Lutz, D. ; Genzel, R. ; Kunze, D. ; [et al.]

Springer

Astrophysics and space science 266 (1999), S. 85-90

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ISSN: 1572-946X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Spectroscopy from the Infrared Space Observatory ISO has for the first timeprovided the sensitivity to exploit the diagnostic power ofmid-infrared fine structure lines and PAH features for the study ofultraluminous infrared galaxies (LIR 〉1012 L ⊙). We report on observations obtainedwith SWS, ISOPHOT-S, and the CVF option of ISOCAM. From both fine structure lines and PAH features, we find that the majority of ULIRGs is predominantlypowered by star formation. Our total sample of about 75 ULIRGs allows tosearch for trends within the class of ULIRGs: The fraction of AGNs increaseswith luminosity above ∼ 3 × 1012L⊙ but there is no obvioustrend for ULIRGs to be more AGN-like with more advanced merger phase.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1002689312663

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