output
20082026
most citedExtreme Coronal Line Emitters: Tidal Disruption of Stars by Massive Black Holes in Galactic Nuclei?

129 citations

Showing astro-ph.COShow all

12 papers · 1 filter

astro-ph.CO2013★ 19 cited

Outflow and hot dust emission in high redshift quasars

Huiyuan Wang, Feijun Xing, Kai Zhang +3

Correlations of hot dust emission with outflow properties are investigated, based on a large z~2 non-broad absorption lines quasar sample built from the Wide-field Infrared Survey…

astro-ph.CO2013★ 69 cited

Long Term Spectral Evolution of Tidal Disruption Candidates Selected by Strong Coronal Lines

Chenwei Yang, Tinggui Wang, Gary Ferland +3

We present results of follow-up optical spectroscopic observations of seven rare, extreme coronal line emitting galaxies reported by Wang et al. (2012) with Multi-Mirror Telescope…

astro-ph.CO2013★ 38 cited

Anomalously Steep Reddening Law in Quasars: An Exceptional Example Observed in IRAS14026+4341

Peng Jiang, Hongyan Zhou, Tuo Ji +7

A fraction of the heavily reddened quasars require a reddening curve which is even steeper than that of the Small Magellanic Cloud. In this paper, we thoroughly characterize the an…

astro-ph.CO2013★ 24 cited

Quasar-Galaxy Clustering through Projected Galaxy Counts at z=0.6-1.2

Shao-Hua Zhang, Ting-Gui Wang, Hui-Yuan Wang +1

We investigate the spatial clustering of galaxies around quasars at redshifts from 0.6 to 1.2 using the photometric data from Sloan Digital Sky Survey (SDSS) Stripe 82. The quasar…

astro-ph.CO2013★ 40 cited

A comparative study of optical/ultraviolet variability of narrow-line Seyfert 1 and broad-line Seyfert 1 active galactic nuclei

Y. L. Ai, W. Yuan, H. Zhou +4

The ensemble optical/ultraviolet variability of narrow-line Seyfert 1 (NLS1) type active galactic nuclei (AGNs) is investigated, based on a sample selected from the Sloan Digital S…

astro-ph.CO2013★ 3 cited

High resolution deep imaging of a bright radio quiet QSO at z~3

Yiping Wang, Wei He, Toru Yamada +3

We have obtained deep J & Ks-band images centered on a bright radio quiet QSO UM402 (z_{em}=2.856) using IRCS camera and AO systems on Subaru Telescope, as well as retrieved WFC3/F…

astro-ph.CO2012★ 3 cited

Discovery of six high-redshift quasars with the Lijiang 2.4m telescope and the Multiple Mirror Telescope

Xue-Bing Wu, Wen-Wen Zuo, Qian Yang +6

Quasars with redshifts greater than 4 are rare, and can be used to probe the structure and evolution of the early universe. Here we report the discovery of six new quasars with …

astro-ph.CO2012★ 26 cited

Metallicity and Quasar Outflows

Huiyuan Wang, Hongyan Zhou, Weimin Yuan +1

Correlations are investigated of the outflow strength of quasars, as measured by the blueshift and asymmetry index (BAI) of the CIV line (Wang et al. 2011), with intensities and ra…

astro-ph.CO2012★ 95 cited

Correlation Analysis of a Large Sample of Narrow-Line Seyfert 1 Galaxies: Linking Central Engine and Host Properties

Dawei Xu, S. Komossa, Hongyan Zhou +5

We present a statistical study of a large, homogeneously analyzed sample of narrow-line Seyfert 1 (NLS1) galaxies, accompanied by a comparison sample of broad-line Seyfert 1 (BLS1)…

astro-ph.CO2011★ 86 cited

Transient Super-strong Coronal Lines and Broad Bumps in the Galaxy SDSS J074820.67+471214.3

Ting-Gui Wang, Hongyan Zhou, Lifan Wang +2

Variable super-strong coronal emission lines were observed in one galaxy, SDSS J095209.56+214313.3, and their origin remains controversy. In this paper, we report the detection of…

astro-ph.CO2011★ 56 cited

Coexistence of Gravitationally Bound and Radiation Driven CIV Emission Line Regions in Active Galactic Nuclei

Huiyuan Wang, Tinggui Wang, Hongyan Zhou +4

There are mutually contradictory views in the literature of the kinematics and structure of high-ionization line (e.g. CIV) emitting regions in active galactic nuclei (AGNs). Two k…

astro-ph.CO2011★ 5 cited

Discovery of A Variable Broad Absorption Line in the BL Lac object PKS 0138-097

Zhang Shaohua, Wang Huiyuan, Zhou Hongyan +2

We report the discovery of a Broad Absorption Line (BAL) of \sim 10^4 km s-1 in width in the previously known BL Lac object PKS 0138-097, which we tentatively identified as a Mg II…