High Resolution WFPC2 Imaging of IRAS 09104+4109

Details High Resolution WFPC2 Imaging of IRAS 09104+4109 High Resolution WFPC2 Imaging of IRAS 09104+4109

1999-03-22

arxiv.org/abs/astro-ph/9903332v1

Astrophys.Space Sci. 266 (1999) 113-118

Astronomy and Astrophysics

Astrophysics

LaTex, 6 pages with 2 postscript and 1 jpg figure. To appear in the proc. of the Ringberg workshop "Ultraluminous Galaxies: Mo

Scientific paper

With a infrared luminosity of nearly 10^13 Lsuns, IRAS 09104+4109 is the most luminous galaxy with z<0.5 in the IRAS All Sky Survey. A radio-loud Seyfert 2 type optical spectrum, a cD host galaxy in a rich cluster, and a massive cooling flow make IRAS 09104+4109 unique among ultraluminous infrared galaxies. Cannibalized cluster members and the cooling intercluster medium may contribute both the fuel and the dust needed to re-radiate the power of IRAS 09104+4109 into the far-infrared. We have imaged IRAS 09104+4109 in the WFPC2 F622W, F814W, and FR680N filters on the HST to obtain rest frame 4300A, 5700A, and [OIII] emission line images on sub-kpc scales. IRAS 09104+4109 displays a complex morphology on the smallest scales, with radiating filaments, an asymmetric [OIII] nebula, and a number of very faint, irregular blue objects surrounding the cD galaxy. We discuss the nature and possible interplay between the enshrouded QSO nucleus, the cD host galaxy and the irregular cluster.

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