Open AccessChandra detection of reflected X‐ray emission from the type 2 QSO in IRAS 09104+4109
Author(s) -
Iwasawa K.,
Fabian A. C.,
Ettori S.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04236.x
Subject(s) - physics , astrophysics , active galactic nucleus , astronomy , observatory , galaxy , quasar , luminosity , luminous infrared galaxy , galaxy cluster , spectroscopy
We present X‐ray imaging spectroscopy of the extremely luminous infrared galaxy IRAS 09104+4109 obtained with the Chandra X‐ray Observatory. With the arcsec resolution of Chandra , an unresolved source at the nucleus is separated from the surrounding cluster emission. A strong iron K line at 6.4 keV on a very hard continuum is detected from the nuclear source, rendering IRAS 09104+4109 the most distant reflection‐dominated X‐ray source known. Combined with the BeppoSAX detection of the excess hard X‐ray emission, it provides further strong support for the presence of a hidden X‐ray source of quasar luminosity in this infrared galaxy. Also seen is a faint linear structure to the north, which coincides with the main radio jet. An X‐ray deficit in the corresponding region suggests an interaction between the cluster medium and the jet driven by the active nucleus.