Tracing the co-evolution path of super massive black holes and spheroids with AKARI-selected ultra-luminous IR galaxies at intermediate redshifts. (arXiv:1911.04095v1 [astro-ph.GA])

Tracing the co-evolution path of super massive black holes and spheroids with AKARI-selected ultra-luminous IR galaxies at intermediate redshifts. (arXiv:1911.04095v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Chen_X/0/1/0/all/0/1">Xiao-Yang Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Akiyama_M/0/1/0/all/0/1">Masayuki Akiyama</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ichikawa_K/0/1/0/all/0/1">Kohei Ichikawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Noda_H/0/1/0/all/0/1">Hirofumi Noda</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Toba_Y/0/1/0/all/0/1">Yoshiki Toba</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yamamura_I/0/1/0/all/0/1">Issei Yamamura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kawaguchi_T/0/1/0/all/0/1">Toshihiro Kawaguchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Abdurrouf/0/1/0/all/0/1">Abdurrouf</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kokubo_M/0/1/0/all/0/1">Mitsuru Kokubo</a>

We present the stellar population and ionized-gas outflow properties of
ultra-luminous IR galaxies (ULIRGs) at z=0.1-1.0, which are selected from the
AKARI FIR all-sky survey. We construct a catalog of 1077 ULIRGs to examine
feedback effect after major mergers. 202 out of the 1077 ULIRGs are
spectroscopically identified by SDSS and Subaru/FOCAS observations. Thanks to
deeper depth and higher resolution of AKARI compared to the previous IRAS
survey, and reliable identification from WISE MIR pointing, the sample is
unique in identifying optically-faint (i~20) IR-bright galaxies, which could be
missed in previous surveys. A self-consistent spectrum-SED decomposition
method, which constrains stellar population properties in SED modeling based on
spectral fitting results, has been employed for 149 ULIRGs whose optical
continua are dominated by host galaxies. They are massive galaxies
(Mstar~1E11-1E12 Msun), associated with intense star formation activities
(SFR~200-2000 Msun/yr). The sample cover a range of AGN bolometric luminosity
of 1E10-1E13 Lsun, and the outflow velocity measured from [OIII] line shows an
association with AGN luminosity. Eight galaxies show extremely fast outflows
with velocity up to 1500-2000 km/s. However, the co-existence of vigorous
starbursts and strong outflows suggests the star formation has not been
quenched during ULIRG phase. By deriving stellar mass and mass fraction of
young stellar population, we find no significant discrepancies between stellar
properties of ULIRGs with weak and powerful AGNs. The results are not
consistent with the merger-induced evolutionary scenario, which suggests that
SF-dominated ULIRGs show smaller stellar mass and younger stellar populations
compared to AGN-dominated ULIRGs.

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