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A Compton-thick nucleus in the dual active galactic nuclei of Mrk 266

Iwasawa, K. and Ricci, C. and Privon, G. C. and Torres-Albà, N. and Inami, H. and Charmandaris, V. and Evans, A. S. and Mazzarella, J. M. and Díaz-Santos, T. (2020) A Compton-thick nucleus in the dual active galactic nuclei of Mrk 266. Astronomy and Astrophysics, 640 . Art. No. A95. ISSN 0004-6361. doi:10.1051/0004-6361/202038513.

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We present the results from our analysis of NuSTAR data of the luminous infrared galaxy Mrk 266, which contains two nuclei, south-western (SW) and north-eastern (NE), which were resolved in previous Chandra imaging. Combining this with the Chandra data, we intepret the hard X-ray spectrum obtained from a NuSTAR observation to result from a steeply rising flux from a Compton-thick active galactic nuclei (AGN) in the SW nucleus which is very faint in the Chandra band, confirming the previous claim. This hard X-ray component is dominated by reflection, and its intrinsic 2–10 keV luminosity is likely to be ∼1 × 10⁴³ erg s⁻¹. Although it is bright in soft X-ray, only a moderately absorbed NE nucleus has a 2–10 keV luminosity of 4 × 10⁴¹ erg s⁻¹, placing it in the low-luminosity AGN class. These results have implications for understanding the detectability and duty cycles of emission from dual AGN in heavily obscured mergers.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Iwasawa, K.0000-0002-4923-3281
Ricci, C.0000-0001-5231-2645
Privon, G. C.0000-0003-3474-1125
Torres-Albà, N.0000-0003-3638-8943
Inami, H.0000-0003-4268-0393
Charmandaris, V.0000-0002-2688-1956
Evans, A. S.0000-0003-2638-1334
Mazzarella, J. M.0000-0002-8204-8619
Díaz-Santos, T.0000-0003-0699-6083
Alternate Title:A Compton-thick nucleus in the dual AGN of Mrk 266
Additional Information:© 2020 ESO. Article published by EDP Sciences. Received 27 May 2020; Accepted 6 July 2020; Published online 19 August 2020. This research made use of data obtained from NuSTAR, XMM-Newton and Chandra X-ray Observatory, software packages of HEASoft and R (R Core Team 2017), and the NASA/IPAC Extragalactic Databases (NED), which is funded by the National Aeronatutics and Space Administration and operated by the California Institute of Technology. KI acknowledges support by the Spanish MICINN under grant PID2019-105510GB-C33. T. D-S. acknowledges support from the CASSACA and CONICYT fund CAS-CONICYT Call 2018. C. R. acknowledges support from the Fondecyt Iniciacion grant 11190831. ASE, GCP and KI acknowledge NASA Astrophysics Data Analysis Program (ADAP) Grant 80NSSC20K0450 (PI: U). ASE was also supported by NSF grant AST 1816838.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Ministerio de Ciencia e Innovación (MCINN)PID2019-105510GB-C33
Chinese Academy of Sciences South America Center for Astronomy (CASSACA)UNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)CAS-CONICYT Call 2018
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)11190831
Subject Keywords:galaxies: active – galaxies: individual: Mrk 266 – X-rays: galaxies
Record Number:CaltechAUTHORS:20200824-074646692
Persistent URL:
Official Citation:A Compton-thick nucleus in the dual active galactic nuclei of Mrk 266. K. Iwasawa, C. Ricci, G. C. Privon, N. Torres-Albà, H. Inami, V. Charmandaris, A. S. Evans, J. M. Mazzarella and T. Díaz-Santos. A&A, 640 (2020) A95; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105066
Deposited By: Tony Diaz
Deposited On:24 Aug 2020 16:16
Last Modified:16 Nov 2021 18:39

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