XMM and NuSTAR Observations of an Optically Quiescent Quasar

0560030 - ASÚ 2023 RIV US eng J - Journal Article
Greenwell, C. - Gandhi, P. - Lansbury, G. B. - Boorman, Peter G. - Mainieri, V. - Stern, D.
XMM and NuSTAR Observations of an Optically Quiescent Quasar.
Astrophysical Journal Letters. Roč. 934, č. 2 (2022), č. článku L34. ISSN 2041-8205. E-ISSN 2041-8213
R&D Projects: GA ČR(CZ) GA22-22643S
Institutional support: RVO:67985815
Keywords : optically quiescent quasars * X-ray active galactic nuclei * infrared galaxies
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 7.9, year: 2022
Method of publishing: Open access

Optically quiescent quasars (OQQs) represent a recently systematized class of infrared-luminous active galactic nuclei (AGNs) that have galaxy-like optical continua. They may represent an interesting, brief phase in the AGN life cycle, e.g., either cocooned within high-covering-factor media or indicative of recent triggering, though their nature remains unclear. Here, we present the first targeted simultaneous X-ray observations of an OQQ, our previously identified prototype, SDSS J075139.06+402811.2 at z = 0.587. The source is significantly detected over 0.5-16 keV with XMM-Newton and NuSTAR, unambiguously confirming the presence of current accretion activity. Spectral modeling yields an intrinsic luminosity L (2-10 keV) approximate to 4.4 x 10(43) erg s(-1), well within the AGN regime, but underluminous relative to its infrared power. It is lightly obscured, with log N (H) [cm(-2)] approximate to 22.
Permanent Link: https://hdl.handle.net/11104/0333333