H. Watarai, K. Misaki, Y. Terashima, and T. Nakagawa
Abstract

We present recent results of X-ray observations of two luminous infrared galaxies, NGC3690 + IC694 (Arp299) and NGC1614 obtained by a Japanese X-ray astronomical satellite ASCA. Both galaxies have quite high infrared luminosity (>1011 L_odot) and strong evidence of merger. The soft X-ray component of these galaxies shows the feature of thermal hot plasma (kT ~1 keV) and the ratio of far-infrared luminosity to X-ray is ~10-4. These characteristics are quite similar with tho se of nearby tipical starburst galaxies. On the other hand, hard X-ray spectra of these galaxies show no sign of hidden AGN activities. These results means even the huge infrared luminosity can be explained by active star formation. Comparisons wit h other infrared luminous galaxies will be discussed also in this poster.