Advanced search
1 file | 179.54 KB Add to list

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

Author
Organization
Abstract
We present the first X-ray spectrum of a hot dust-obscured galaxy (DOG), namely W1835+4355 at z similar to 2.3. Hot DOGs represent a very rare population of hyperluminous (>= 10(47) erg s(-1)), 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 similar to 0.8) as typically seen in heavily obscured AGN. This, along with the presence of strong Fe K alpha emission, clearly suggests a reflection-dominated spectrum due to Compton-thick absorption. In this scenario, the observed luminosity of L2-10 similar to 2 x 10(44) erg s(-1) is a fraction (<10%) of the intrinsic one, which is estimated to be greater than or similar to 5 x 10(45) erg s(-1) 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 (similar to 75%) to the IR luminosity as well as the amount of star formation (similar to 2100 M-circle dot yr(-1)). 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.
Keywords
galaxies: nuclei, galaxies: active, submillimeter: galaxies, X-rays: galaxies, ACTIVE GALACTIC NUCLEI, X-RAY, SEYFERT-GALAXIES, FOLLOW-UP, DISTRIBUTIONS, POPULATION, REDSHIFT, SPECTRUM, FEEDBACK, VIEW, galaxies: individual: WISE J183533.71+435549.1

Downloads

  • aa25324-14.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 179.54 KB

Citation

Please use this url to cite or link to this publication:

MLA
Piconcelli, E, C Vignali, S Bianchi, et al. “The Hidden Quasar Nucleus of a WISE-selected, Hyperluminous, Dust-obscured Galaxy at z ∼ 2.3.” ASTRONOMY & ASTROPHYSICS 574 (2015): n. pag. Print.
APA
Piconcelli, E., Vignali, C., Bianchi, S., Zappacosta, L., Fritz, J., Lanzuisi, G., Miniutti, G., et al. (2015). The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy at z ∼ 2.3. ASTRONOMY & ASTROPHYSICS, 574.
Chicago author-date
Piconcelli, E, C Vignali, S Bianchi, L Zappacosta, Jacopo Fritz, G Lanzuisi, G Miniutti, et al. 2015. “The Hidden Quasar Nucleus of a WISE-selected, Hyperluminous, Dust-obscured Galaxy at z ∼ 2.3.” Astronomy & Astrophysics 574.
Chicago author-date (all authors)
Piconcelli, E, C Vignali, S Bianchi, L Zappacosta, Jacopo Fritz, G Lanzuisi, G Miniutti, A Bongiorno, C Feruglio, F Fiore, and R Maiolino. 2015. “The Hidden Quasar Nucleus of a WISE-selected, Hyperluminous, Dust-obscured Galaxy at z ∼ 2.3.” Astronomy & Astrophysics 574.
Vancouver
1.
Piconcelli E, Vignali C, Bianchi S, Zappacosta L, Fritz J, Lanzuisi G, et al. The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy at z ∼ 2.3. ASTRONOMY & ASTROPHYSICS. 2015;574.
IEEE
[1]
E. Piconcelli et al., “The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy at z ∼ 2.3,” ASTRONOMY & ASTROPHYSICS, vol. 574, 2015.
@article{7073246,
  abstract     = {{We present the first X-ray spectrum of a hot dust-obscured galaxy (DOG), namely W1835+4355 at z similar to 2.3. Hot DOGs represent a very rare population of hyperluminous (>= 10(47) erg s(-1)), 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 similar to 0.8) as typically seen in heavily obscured AGN. This, along with the presence of strong Fe K alpha emission, clearly suggests a reflection-dominated spectrum due to Compton-thick absorption. In this scenario, the observed luminosity of L2-10 similar to 2 x 10(44) erg s(-1) is a fraction (<10%) of the intrinsic one, which is estimated to be greater than or similar to 5 x 10(45) erg s(-1) 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 (similar to 75%) to the IR luminosity as well as the amount of star formation (similar to 2100 M-circle dot yr(-1)). 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.}},
  articleno    = {{L9}},
  author       = {{Piconcelli, E and Vignali, C and Bianchi, S and Zappacosta, L and Fritz, Jacopo and Lanzuisi, G and Miniutti, G and Bongiorno, A and Feruglio, C and Fiore, F and Maiolino, R}},
  issn         = {{0004-6361}},
  journal      = {{ASTRONOMY & ASTROPHYSICS}},
  keywords     = {{galaxies: nuclei,galaxies: active,submillimeter: galaxies,X-rays: galaxies,ACTIVE GALACTIC NUCLEI,X-RAY,SEYFERT-GALAXIES,FOLLOW-UP,DISTRIBUTIONS,POPULATION,REDSHIFT,SPECTRUM,FEEDBACK,VIEW,galaxies: individual: WISE J183533.71+435549.1}},
  language     = {{eng}},
  pages        = {{4}},
  title        = {{The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy at z ∼ 2.3}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201425324}},
  volume       = {{574}},
  year         = {{2015}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: