English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We have started a long-term reverberation mapping project using the WyomingInfrared Observatory 2.3 meter telescope titled "Monitoring AGNs with H\beta\Asymmetry" (MAHA). The motivations of the project are to explore the geometryand kinematics of the gas responsible for complex H\beta\ emission-lineprofiles, ideally leading to an understanding of the structures and origins ofthe broad-line region (BLR). Furthermore, such a project provides theopportunity to search for evidence of close binary supermassive black holes. Wedescribe MAHA and report initial results from our first campaign, from December2016 to May 2017, highlighting velocity-resolved time lags for four AGNs withasymmetric H\beta\ lines. We find that 3C 120, Ark 120, and Mrk 6 displaycomplex features different from the simple signatures expected for pureoutflow, inflow, or a Keplerian disk. While three of the objects have beenpreviously reverberation mapped, including velocity-resolved time lags in thecases of 3C 120 and Mrk 6, we report a time lag and corresponding black holemass measurement for SBS 1518+593 for the first time. Furthermore, SBS1518+593, the least asymmetric of the four, does show velocity-resolved timelags characteristic of a Keplerian disk or virialized motion more generally.Also, the velocity-resolved time lags of 3C 120 have significantly changedsince previously observed, indicating an evolution of its BLR structure. Futureanalyses of the data for these objects and others in MAHA will explore the fulldiversity of H\beta\ lines and the physics of AGN BLRs.

Monitoring AGNs with H\beta\ Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping