Soft X-ray properties of ultraluminous IRAS galaxies.

Details Soft X-ray properties of ultraluminous IRAS galaxies. Soft X-ray properties of ultraluminous IRAS galaxies.

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997areps...1..166x&link_type=abstract

Astrophysics Reports, Special Issue, No. 2, p. 166 - 177

Astronomy and Astrophysics

Astrophysics

Infrared Galaxies: Soft X Rays

Scientific paper

The authors report on the results of the cross-correlation of a sample of 418 ultraluminous IRAS galaxies (ULIRGs) with the ROSAT All-Sky Survey as well as the ROSAT public archive. There are more than 58% (18/31) AGNs in ROSAT detected ULIRGs sample, however the ratios of LX/LIR for most of them are very low, even for some of Sy1s and QSOs. On the other hand, the soft X-ray morphology for large percent of them is extended and the X-ray spectra are hard for these extended objects. Therefore, the main energy output at soft X-ray band for most of identified ULIRGs is not from the central AGN, but from hot diffuse gas around them.

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