24 citations · 63 across the 12 of their papers we have counts for
12 papers
Constraints on the Intranight Optical Variability of Intermediate-Mass Black Hole Candidates
Wenwen Zuo, Hengxiao Guo, Wanling Liu +12
Intermediate-mass black holes (IMBHs) provide a unique regime for studying accretion variability at the low-mass end of the black hole population, yet their intranight optical vari…
The Narrow-Line Seyfert 1 Phenomenon: Accretion State Versus Host Galaxy Properties
Kaizheng Guo, Hassen M. Yesuf, Lei Hao +3
The physical origin of the narrow-line Seyfert 1 (NLS1) and broad-line Seyfert 1 (BLS1) dichotomy remains debated, with competing scenarios invoking host-galaxy evolution or intrin…
Unraveling the mysteries of Jets in peculiar NLSy1 galaxies through multi-wavelength variability
Vineet Ojha, Xue-Bing Wu, Luis C. Ho +4
Radio-quiet narrow-line Seyfert 1 galaxies (RQ-NLSy1s) are generally considered to be dominated by thermal emission from the accretion disk. However, recurring 37 GHz radio flares…
Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
Veeresh Singh, Parveen Kumar, Avik Kumar Das +1
Narrow-line Seyfert 1 galaxies (NLS1s) are generally known to be radio-quiet Active Galactic Nuclei (AGN), but a tiny subset of them are found to be extremely radio-loud with radio…
The Relative Contributions of Accretion Disk versus Jet to the Optical and Mid-infrared Variability of Seyfert Galaxies
Vineet Ojha, Xue-Bing Wu, Luis C. Ho
We performed a comprehensive analysis of flux and color variability in a redshift-matched sample of Seyfert galaxies, comprising 23 gamma-ray-detected narrow-line Seyfert 1 galaxie…
Intra-night optical variability of peculiar narrow-line Seyfert 1 galaxies with enigmatic jet behavior
Vineet Ojha, Veeresh Singh, M. Berton +1
Variability studies of active galactic nuclei are a powerful diagnostic tool in understanding the physical processes occurring in disk-jet regions, unresolved by direct imaging wit…
Evidence of jet induced optical microvariability in radio-loud Narrow Line Seyfert 1 Galaxies
Vineet Ojha, Vivek Kumar Jha, Hum Chand +1
To quantify the role of radio jets for Intra-Night Optical Variability (INOV) in Radio-Loud Narrow-Line Seyfert 1 (RLNLSy1) galaxies, we report the first systematic comparative INO…
Intra-night optical variability study of a non-jetted narrow-line Seyfert 1 galaxy: SDSS J163401.94+480940.1
Vineet Ojha
SDSS J163401.94480940.2 is a non-jetted radio-loud narrow-line Seyfert 1 (NLSy1) galaxy. Optical monitoring of this object was carried out in two intra-night sessions each $\geq…
A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
Vivek Kumar Jha, Hum Chand, Vineet Ojha +2
We present a comparative study of the physical properties of a homogeneous sample of 144 Narrow line Seyfert 1 (NLSy1) and 117 Broad-line Seyfert 1 (BLSy1) galaxies. These two samp…
Intra-night optical variability of ray detected narrow-line Seyfert 1 galaxies
Vineet Ojha, Hum Chand, Gopal-Krishna
We report the first attempt to systematically characterise intra-night optical variability (INOV) of the rare and enigmatic subset of Narrow-Line Seyfert1 galaxies (NLSy1s), which…
A comparison of X-ray photon indices among the narrow and broad-line Seyfert 1 galaxies
Vineet Ojha, Hum Chand, Gulab Chand Dewangan +1
We present a detailed comparative systematic study using a sample of 221 Narrow-line Seyfert 1 (NLSy1) galaxies in comparison to a redshift matched sample of 154 Broad-line Seyfert…
Intra-Night Optical monitoring of three γ-ray detected Narrow-line Seyfert 1 galaxies
Vineet Ojha, Gopal-Krishna, Hum Chand
For 3 radio-loud -ray detected Narrow-Line Seyfert 1 (-ray NLSy1) galaxies, we report optical variability on intra-night and/or week-like time scales, based on five 3…