The Astrophysical Journal | VOL. 744
Read

A candidate dual active galactic nucleus at z = 1.175

Publication Date Jan 1, 2012

Abstract

The X-ray source CXOXBJ142607.6+353351 (CXOJ1426+35), which was identified in a 172 ks Chandra image in the Bootes field, shows double-peaked rest-frame optical/UV emission lines, separated by 0"69 (5.5 kpc) in the spatial dimension and by 690 km s^(–1) in the velocity dimension. The high excitation lines and emission line ratios indicate both systems are ionized by an active galactic nucleus (AGN) continuum, and the double-peaked profile resembles that of candidate dual AGNs. At a redshift of z = 1.175, this source is the highest redshift candidate dual AGN yet identified. However, many sources have similar emission line profiles for which other interpretations are favored. We have analyzed the substantial archival data available in this field as well as acquired near-infrared (NIR) adaptive optics (AO) imaging and NIR slit spectroscopy. The X-ray spectrum is hard, implying a column density of several 10^(23) cm^(–2). Though heavily obscured, the source is also one of the brightest in the field, with an absorption-corrected 2-10 keV luminosity of ~10^(45) erg s^(–1). Outflows driven by an accretion disk may produce the double-peaked lines if the central engine accretes near the Eddington limit. However, we may be seeing the narrow line regions of two AGNs following a galactic merger. While the AO image reveals only a single source, a second AGN would easily be obscured by the significant extinction inferred from the X-ray data. Understanding the physical processes producing the complex emission line profiles seen in CXOJ142...

Concepts

Active Galactic Nucleus High Excitation Lines Dual Active Galactic Nucleus Adaptive Optics Eddington Limit Erg S Galactic Merger Bootes Emission Line Accretion Disk

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Coronavirus Research Articles published between Nov 28, 2022 to Dec 04, 2022

R DiscoveryDec 05, 2022
R DiscoveryArticles Included:  5

The coronavirus disease 2019 (COVID-19) is a contagious disease that is caused by a novel coronavirus. Bentham is offering subject-based scholarly con...

Read More

Climate change Research Articles published between Nov 28, 2022 to Dec 04, 2022

R DiscoveryDec 05, 2022
R DiscoveryArticles Included:  5

We use cookies to improve your website experience. To learn about our use of cookies and how you can manage your cookie settings, please see our Cooki...

Read More

Quality Of Education Research Articles published between Nov 28, 2022 to Dec 04, 2022

R DiscoveryDec 05, 2022
R DiscoveryArticles Included:  4

Introduction: The Internet is an extensively used source of medical education by the public. YouTube is a valuable source of information which can be ...

Read More

Gender Equality Research Articles published between Nov 28, 2022 to Dec 04, 2022

R DiscoveryDec 05, 2022
R DiscoveryArticles Included:  3

Gender equity in the classroom is important for teachers to think about in order to ensure they are creating safe environments that allow their studen...

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19

ONE PROBLEM . ONE PURPOSE . ONE PLACE

Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.