搜索结果: 1-11 共查到“星系与宇宙学 Variability”相关记录11条 . 查询时间(0.281 秒)
Near-Infrared Photometric Variability of Stars Toward the Orion A Molecular Cloud
YY Ori BM Ori
2014/12/26
We present an analysis of J, H, and Ks time series photometry obtained with the southern 2MASS telescope over a 0.84◦×6◦ region centered near the Trapezium region of the Orion Nebula Clust...
Velocity Structure and Variability of [O III] Emission in Black Hole Host Globular Cluster RZ2109
Velocity Structure Variability Emission Globular Cluster
2011/10/12
We present a multi-facility study of the optical spectrum of the extragalactic globular cluster RZ2109, which hosts a bright black hole X-ray source. The optical spectrum of RZ2109 shows strong and ve...
The effects of X-ray absorption variability in NGC 4395
galaxies: active – galaxies: individual: NGC 4395 – X-rays: galaxies
2011/10/8
We present a new X-ray analysis of the dwarf Seyfert galaxy NGC 4395, based on two archival XMM-Newton and Suzaku observations. This source is well known for a series of remarkable properties: one of ...
Dual-Frequency Observations of 140 Compact, Flat-Spectrum Active Galactic Nuclei for Scintillation-Induced Variability
Flat-Spectrum Active Galactic Nuclei Variability
2011/10/8
The 4.9 GHz Micro-Arcsecond Scintillation-Induced Variability (MASIV) Survey detected a drop in Interstellar Scintillation (ISS) for sources at redshifts z > 2, indicating an apparent increase in angu...
Can Self Organized Critical Accretion Disks Generate a Log-normal Emission Variability in AGN?
Accretion accretion disks
2011/9/29
Active Galactic Nuclei (AGN), such as Seyfert galaxies, quasars, etc., show light variations in all wavelength bands, with various amplitude and in many time scales. The variations usually look errati...
Multiwavelength campaign on Mrk 509. I. Variability and spectral energy distribution
Galaxies: active – quasars: absorption lines – X-rays: general
2011/9/27
(Abridged) Active galactic nuclei show a wealth of interesting physical processes, some of which are poorly understood. We want to address a number of open questions, including the location and physic...
Night to night variability of the emission lines in the nuclear spectrum of the Seyfert Galaxy NGC 3227
emission lines Galaxy nuclear spectrum
2009/7/9
Night to night variability of the emission lines in the nuclear spectrum of the Seyfert Galaxy NGC 3227。
Investigation of forbidden line variability in Seyfert Galaxy Nuclei at Crimean observatory in 1971-2006
Seyfert Galaxy 1971-2006 Crimean observatory
2009/7/9
Investigation of forbidden line variability in Seyfert Galaxy Nuclei at Crimean observatory in 1971-2006。
Proper motions in the faint sky variability survey。
Long and short term variability in the seyfert galaxy mrk 110
Optical Variability Properties of High Luminosity AGN Classes
active galaxies:jets galaxies:photometry quasars
2009/5/14
We present the results of a comparative study of the intranight
optical variability (INOV) characteristics of radio-loud and radioquiet
quasars, which involves a systematic intra-night optical monit...