Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...19310721a&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #107.21; Bulletin of the American Astronomical Society, Vol. 30, p.1414
Astronomy and Astrophysics
Astronomy
Scientific paper
Ultraluminous infrared galaxies (ULIRGs) have the luminosities of quasars, yet emit nearly all of their energy in the far--infrared part of the spectrum. With an infrared luminosity of nearly 10(13) Lsun, IRAS 09104+4109 is one of the most luminous objects in the IRAS survey. The presence of a Seyfert 2 optical spectrum, broad, polarized optical line emission, and a double--lobed radio jet all point to a buried quasar as the source of power in IRAS 09104+4109. What makes IRAS 09104+4109 unique, is that it is a cD galaxy at the center of what is apparently a rich, flattened cluster at z=0.44. This cluster may be experiencing a cooling flow depositing as much as 500-1000 Msun yr(-1) of material over the central 200 kpc. We have imaged IRAS 09104+4109 with the WFPC2 in the F622W, F814W, and FR680N filters to obtain rest--frame blue, visual, and [OIII] emission--line images of this system on sub--kpc scales. IRAS 09104+4109 displays a complex morphology on the smallest scales, with radiating filaments, an asymmetric emission--line nebula, and a number of faint, irregular blue objects surrounding the cD galaxy. We combine these data with new, high--resolution K--band imaging from the W.M. Keck Telescope and discuss the nature and interplay between the enshrouded quasar nucleus, the cD host galaxy, and the cluster.
Armus Lee
Neugebauer Gernot
Soifer Thomas B.
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