12 papers · 1 filter
Broad-line Balmer Decrements in Blue Active Galactic Nuclei
Xiaobo Dong, Tinggui Wang, Jianguo Wang +4
We have investigated the broad-line Balmer decrements (Halpha/Hbeta) for a large, homogeneous sample of Seyfert 1 galaxies and QSOs using spectroscopic data obtained in the Sloan D…
The XMM-SSC survey of hard-spectrum XMM-Newton sources 1: optically bright sources
M. J. Page, I. Lehmann, Th. Boller +15
We present optical and X-ray data for a sample of serendipitous XMM-Newton sources that are selected to have 0.5-2 keV vs 2-4.5 keV X-ray hardness ratios which are harder than the…
Metal Enriched Outflows and Dusty starburst in the type II quasar Q 1321+058
Ting-Gui Wang, Hongyan Zhou, Honglin Lu +3
We present an analysis of the emission line property and the broad band spectral energy distribution of the ultra-luminous infrared Type II quasar Q132+058. The optical and ultravi…
A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410
Hongyan Zhou, Tinggui Wang, Weimin Yuan +7
We report the identification of 2MASX J032441.19+341045.9 (hereafter 2MASX J0324+3410) with an appealing object which shows the dual properties of both a narrow line Seyfert 1 gala…
SDSS J160531.84+174826.1: A Dwarf Disk Galaxy With An Intermediate-Mass Black Hole
Xiaobo Dong, Tinggui Wang, Weimin Yuan +7
We report the discovery of a dwarf Seyfert 1 active galactic nucleus (AGN) with a candidate intermediate-mass black hole hosted by the dwarf galaxy SDSS J160531.84+174826.1 at z=0.…
A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
Hongyan Zhou, Tinggui Wang, Weimin Yuan +4
This is the first paper in a series dedicated to the study of the emission-line and continuum properties of narrow line Seyfert 1 galaxies (NLS1s). We carried out a systematic sear…