2018A&A...620L...3M


Query : 2018A&A...620L...3M

2018A&A...620L...3M - Astronomy and Astrophysics, volume 620, L3-3 (2018/12-1)

Ratio of black hole to galaxy mass of an extremely red dust-obscured galaxy at z = 2.52.

MATSUOKA K., TOBA Y., SHIDATSU M., UEDA Y., IWASAWA K., TERASHIMA Y., IMANISHI M., NAGAO T., MARCONI A. and WANG W.-H.

Abstract (from CDS):

We present a near-infrared (NIR) spectrum of WISE J104222.11+164115.3, an extremely red dust-obscured galaxy (DOG), which has been observed with the Long-slit Intermediate Resolution Infrared Spectrograph (LIRIS) on the 4.2m William Hershel Telescope. This object was selected as a hyper-luminous DOG candidate at z∼2 by combining the optical and IR photometric data based on the Sloan Digital Sky Survey (SDSS) and Wide-field Infrared Survey Explorer (WISE), although its redshift had not yet been confirmed. Based on the LIRIS observation, we confirmed its redshift of 2.521 and total IR luminosity of log(LIR/L)=14.57, which satisfies the criterion for an extremely luminous IR galaxy (ELIRG). Moreover, we indicate that this object seems to have an extremely massive black hole with MBH=1010.92M based on the broad Hα line: the host stellar mass is derived as M*=1013.55M by a fit of the spectral energy distribution. Very recently, it has been reported that this object is an anomalous gravitationally lensed quasar based on near-IR high-resolution imaging data obtained with the Hubble Space Telescope. Its magnification factor has also been estimated with some uncertainty (i.e., µ=53-122). We investigate the ratio of the black hole to galaxy mass, which is less strongly affected by a lensing magnification factor, instead of the absolute values of the luminosities and masses. We find that the MBH/M* ratio (i.e., 0.0140-0.0204) is significantly higher than the local relation, following a sequence of unobscured quasars instead of obscured objects (e.g., submillimeter galaxies) at the same redshift. Moreover, the LIRIS spectrum shows strongly blueshifted oxygen lines with an outflowing velocity of ∼1100km/s, and our Swift X-ray observation also supports that this source is an absorbed AGN with an intrinsic column density of NHint=4.9x1023cm–2. These results imply that WISE J104222.11+164115.3 is in a blow-out phase at the end of the buried rapid black hole growth.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: nuclei - quasars: emission lines - quasars: general

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 44128 * 06 20 43.2910514064 +15 41 39.115151304   9.19 8.98     A0V 15 0
2 COSMOS2015 558647 QSO 10 01 11.3378613816 +02 08 55.615115832   22.159 21.175   20.50 ~ 38 0
3 WISE J104222.11+164115.3 G 10 42 22.11 +16 41 15.3           ~ 6 0
4 [VV2000] J131052.5-005533 QSO 13 10 52.5116110080 -00 55 33.122110944   21.31 19.95     ~ 41 0
5 [VV2006] J144617.4-010130 QSO 14 46 17.3554825536 -01 01 31.149859872   21.65 20.48     ~ 35 0

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2023.02.01-19:44:33

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