2015A&A...574L...9P


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.28CET11:19:03

2015A&A...574L...9P - Astronomy and Astrophysics, volume 574, L9-9 (2015/2-1)

The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy at z ∼ 2.3.

PICONCELLI E., VIGNALI C., BIANCHI S., ZAPPACOSTA L., FRITZ J., LANZUISI G., MINIUTTI G., BONGIORNO A., FERUGLIO C., FIORE F. and MAIOLINO R.

Abstract (from CDS):

We present the first X-ray spectrum of a hot dust-obscured galaxy (DOG), namely W1835+4355 at z∼2.3. Hot DOGs represent a very rare population of hyperluminous (≥1047erg/s), dust-enshrouded objects at z≥2 recently discovered in the WISE All Sky Survey. The 40ks XMM-Newton spectrum reveals a continuum as flat (Γ∼0.8) as typically seen in heavily obscured AGN. This, along with the presence of strong Fe Kα emission, clearly suggests a reflection-dominated spectrum due to Compton-thick absorption. In this scenario, the observed luminosity of L2–10∼2x1044erg/s is a fraction (<10%) of the intrinsic one, which is estimated to be >5x1045erg/s by using several proxies. The Herschel data allow us to constrain the SED up to the sub-mm band, providing a reliable estimate of the quasar contribution (∼75%) to the IR luminosity as well as the amount of star formation (∼2100M/yr). Our results thus provide additional pieces of evidence that associate Hot DOGs with an exceptionally dusty phase during which luminous quasars and massive galaxies co-evolve and a very efficient and powerful AGN-driven feedback mechanism is predicted by models.

Abstract Copyright:

Journal keyword(s): galaxies: individual: WISE J183533.71+435549.1 - galaxies: active - galaxies: nuclei - submillimeter: galaxies - X-rays: galaxies

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2649 4
2 WISE J181417.29+341224.9 G 18 14 17.29 +34 12 24.9           ~ 21 0
3 WISE J183533.71+435549.1 G 18 35 33.71 +43 55 49.1           ~ 12 0

    Equat.    Gal    SGal    Ecl

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2020.02.28-11:19:03

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