Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The hidden quasar nucleus of a WISE-selected, hyperluminous,
  dust-obscured galaxy at z ~ 2.3   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 (>= 10^47 erg/s), dust-enshrouded objects at z > 2 recently
discovered in the WISE All Sky Survey. The 40 ks XMM-Newton spectrum reveals a
continuum as flat (Gamma ~ 0.8) as typically seen in heavily obscured AGN.
This, along with the presence of strong Fe Kalpha emission, clearly suggests a
reflection-dominated spectrum due to Compton-thick absorption. In this
scenario, the observed luminosity of L(2-10 keV) ~ 2 x 10^44 erg/s is a
fraction (<10%) of the intrinsic one, which is estimated to be >~ 5 x 10^45
erg/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 (~ 2100
Msun/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.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math