搜索结果: 1-12 共查到“天文学 Narrow-line”相关记录12条 . 查询时间(0.156 秒)
Very Long Baseline Array Imaging of Parsec-scale Jet Structures in Radio-loud Narrow-line Seyfert 1 Galaxies
Long Baseline Array Imaging Radio-loud Narrow-line Seyfert
2011/10/21
We conducted very long baseline interferometry (VLBI) observations of five radio-loud narrow-line Seyfert 1 (NLS1) galaxies in milliarcsecond resolutions at 1.7 GHz (18 cm) using the Very Long Baselin...
Narrow-line Seyfert 1 galaxies: an amasing class of AGN
Masers – Galaxies: active – Galaxies: nuclei – Galaxies: Seyfert – Radio lines: galaxies
2011/10/21
Narrow-line Seyfert 1 (NLS1) galaxies are a class of active galactic nuclei (AGN) that have all the properties of type 1 Seyfert galaxies but show peculiar characteristics, including the narrowest Bal...
On the BH-galaxy relation of AGN and Narrow Line Seyfert 1 Galaxies
BH-galaxy relation AGN Narrow Seyfert Galaxies
2011/10/12
Massive black holes (BHs) are detected in the centers of many nearby galaxies are linearly correlated with the luminosity of the host bulge (spheroid), the black hole mass being about 0.1% of the stel...
A view of the narrow-line region in the infrared: active galactic nuclei with resolved fine-structure lines in the Spitzer archive
narrow-line region infrared: active galactic nuclei resolved fine-structure lines
2011/10/10
We queried the Spitzer archive for high-resolution observations with the Infrared Spectrograph of optically selected active galactic nuclei (AGN) for the purpose of identifying sources with resolved f...
Orientation effects in quasar spectra: The broad- and narrow-line regions
Orientation effects quasar spectra
2011/1/11
We use the SDSS, along with the NVSS and the WENSS to define a sample of 746 radio-loud quasars and measure their 330MHz to 1.4GHz spectral indexes. Following previous authors we take the spectral ind...
X-Ray Properties of Narrow-Line Seyfert 1 Galaxies with Very Small Broad-Line Widths
galaxies active— galaxies Seyfert — X-rays galaxies
2010/11/16
Narrow-line Seyfert 1 galaxies (NLS1s) with very small broad-line widths (say,FWHM(H ) . 1200 kms-1) represent the extreme type of Seyfert 1 galaxies that have small black hole masses (MBH) and/or hig...
The first gamma-ray outburst of a Narrow-Line Seyfert 1 Galaxy: the case of PMN J0948+0022 in July 2010
gamma-ray outburst Narrow-Line Seyfert 1 Galaxy
2011/1/10
We report on a multiwavelength campaign on the radio-loud Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022 (z=0.5846) performed in 2010 July-September and triggered by a high-energy gamma-ray outbur...
The density of the narrow-line region of type 1 Active Galactic Nuclei
narrow-line region density Active Galactic Nuclei
2009/7/9
The density of the narrow-line region of type 1 Active Galactic Nuclei。
Narrow-line Seyfert 1 Galaxies。
A Near-infrared view of the Narrow Line Region of AGN。
The hst view of the narrow line region of seyfert galaxies
seyfert galaxies narrow line region
2009/6/10
The hst view of the narrow line region of seyfert galaxies。
Narrow-line seyfert 1 galaxies：the [O III] λ5007/Hβ ratio and photoionization models for the nlr
seyfert 1 galaxies photoionization models λ5007/Hβ ratio
2009/6/5
Narrow-line seyfert 1 galaxies：the [O III] λ5007/Hβ ratio and photoionization models for the nlr。