SUMMARY OF PROPOSAL 71083

DR. RYUICHI FUJIMOTO
FUJIMOTO@ASTROI.ISAS.AC.JP

INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
3-1-1 YOSHINODAI
SAGAMIHARA
KANAGAWA JAPAN 229-8510
Tel: 0427-59-8136 Fax: 0427-59-8455
Medium: 2.5GB8MM
Subject: NORMAL GALAXIES

OBSERVATIONS OF INFRARED-LUMINOUS STARBURST GALAXIES


ABSTRACT

From the recent ASCA observations, X-ray spectra of ultraluminous infrared galaxies (ULIRGs) are usually composed of two components; a hard non-thermal coponent which represents a dust-enshrouded AGN, plus a soft thermal component. If the latter is an emission from collisional ionization plasma, it resresents a nuclear starburst activity, and the enoumous far-infrared emission of ULIRGs is concluded to be powered by nuclear starbursts. On the other hand, if it is mainly comes from photoionized plasma, the AGN activity may be much larger than thought so far. We propose to observe two nearby infrared-luminous starburst galaxies, to study the origin of the soft thermal component of ULIRGs, which will let us reveal the mystery of the power source of ULIRGs.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
TAKAO NAKAGAWAISASJAPAN
TSUNEO KIIISASJAPAN
HAJIME INOUEISASJAPAN
YASUSHI OGASAKANAGOYA UNIVERSITYJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)VV 114
C
 16.9442-17.5060
50 ks
N
Y
P
0.07000
1