Polarization of broad line emission in radio galaxies

2019 ◽  
Vol 340 (5) ◽  
pp. 445-448
Author(s):  
Mikhail Y. Piotrovich ◽  
Stanislava D. Buliga ◽  
Tinatin M. Natsvlishvili ◽  
Yuri N. Gnedin
Keyword(s):  
Line Emission ◽  
Radio Galaxies ◽  
Broad Line

scholarly journals Spectropolarimetry of Double Peaked Broad Hα Lines in Radio Galaxies

1997 ◽  
Vol 163 ◽  
pp. 693-694
Author(s):  
E.A. Corbett ◽  
A. Robinson ◽  
S. Young ◽  
D.J. Axon
Keyword(s):  
Accretion Disk ◽  
Line Emission ◽  
Position Angle ◽  
Radio Galaxies ◽  
Broad Line ◽  
Line Profiles ◽  
The Third ◽  
Jet Axis

AbstractSpectropolarimetric observations of 3 broad line radio galaxies exhibiting double peaked broad Hα lines, show that two of the sources (Arpl02B and 3C390.3) have single peaked line profiles in polarized flux with a position angle aligned with the jet axis. The third source (3C382) exhibits no polarized line emission at all. The consequences of these observations for the relativistic accretion disk and other BLR models are discussed.

Ultraviolet and optical spectra of broad-line radio galaxies

2008 ◽  
pp. 83-85
Author(s):  
D. Michael Crenshaw ◽  
Bradley M. Peterson ◽  
R. Mark Wagner
Keyword(s):  
Radio Galaxies ◽  
Optical Spectra ◽  
Broad Line

A Detailed Study of High Redshift Radio Galaxies

1995 ◽  
Vol 149 ◽  
pp. 123-126
Author(s):  
H. Hippelein ◽  
K. Meisenheimer ◽  
M. Neeser
Keyword(s):  
High Redshift ◽  
Line Emission ◽  
Radio Galaxies ◽  
Fabry Perot

AbstractWe report on an ongoing survey of the extended line emission in high redshift radio galaxies, using a tunable Fabry-Perot etalon. Some results and suitable models are presented for individual sources.

scholarly journals X-ray and soft  -ray spectra of broad-line radio galaxies

1998 ◽  
Vol 299 (2) ◽  
pp. 449-466 ◽  
Author(s):  
P. R. Wozniak ◽  
A. A. Zdziarski ◽  
D. Smith ◽  
G. M. Madejski ◽  
W. N. Johnson
Keyword(s):  
Radio Galaxies ◽  
Broad Line ◽  
X Ray

scholarly journals Space Telescope and Optical Reverberation Mapping Project: A Leap Forward in Reverberation Mapping

2016 ◽  
Vol 12 (S324) ◽  
pp. 215-218 ◽  
Author(s):  
Bradley M. Peterson
Keyword(s):  
World Wide ◽  
Hubble Space Telescope ◽  
Line Emission ◽  
Broad Line ◽  
Space Telescope ◽  
Reverberation Mapping ◽  
Significant Challenge ◽  
Past Behavior ◽  
Line Region ◽  
Mapping Program

AbstractIn 2014, a 179-orbit allocation of Hubble Space Telescope time anchored a massive reverberation-mapping program on the well-studied Seyfert 1 galaxy NGC 5548. Supporting imaging and spectrophotometric observations were provided by Swift, Chandra, Spitzer, and a world-wide network of ground-based telescopes. Understanding the data remains a significant challenge, partly because the level of detail is far beyond what has been seen before and partly because the behavior of the AGN was not typical of its past behavior. Based on analysis to date, the following conclusions can be reached: (1) the AGN accretion disk has a temperature profile that is consistent with that predicted by the Shakura–Sunyaev model, but is about three times larger than expected; (2) at least part of the broad-line region appears to be a Keplerian disk seen at intermediate inclination, and (3) the broad-line emission response from the far side of the disk is weaker than expected.

scholarly journals Polarized Broad‐Line Emission from Low‐Luminosity Active Galactic Nuclei

1999 ◽  
Vol 525 (2) ◽  
pp. 673-684 ◽  
Author(s):  
Aaron J. Barth ◽  
Alexei V. Filippenko ◽  
Edward C. Moran
Keyword(s):  
Active Galactic Nuclei ◽  
Line Emission ◽  
Galactic Nuclei ◽  
Broad Line

scholarly journals JETS AND OUTFLOWS IN RADIO GALAXIES: IMPLICATIONS FOR AGN FEEDBACK

2012 ◽  
Vol 08 ◽  
pp. 396-399 ◽  
Author(s):  
ELEONORA TORRESI ◽  
PAOLA GRANDI ◽  
ELISA COSTANTINI ◽  
GIORGIO G. C. PALUMBO
Keyword(s):  
Black Holes ◽  
Galaxy Formation ◽  
Surrounding Medium ◽  
Radio Galaxies ◽  
Broad Line ◽  
Jets And Outflows ◽  
Massive Black Holes ◽  
X Ray ◽  
Formation And Evolution

One of the main debated astrophysical problems is the role of the AGN feedback in galaxy formation. It is known that massive black holes have a profound effect on the formation and evolution of galaxies, but how black holes and galaxies communicate is still an unsolved problem. For Radio Galaxies, feedback studies have mainly focused on jet/cavity systems in the most massive and X–ray luminous galaxy clusters. The recent high–resolution detection of warm absorbers in some Broad Line Radio Galaxies allow us to investigate the interplay between the nuclear engine and the surrounding medium from a different perspective. We report on the detection of warm absorbers in two Broad Line Radio Galaxies, 3C 382 and 3C 390.3, and discuss the physical and energetic properties of the absorbing gas. Finally, we attempt a comparison between radio–loud and radio–quiet outflows.

scholarly journals The 6m mm-VLBI telescope at Kagoshima, Japan

1994 ◽  
Vol 140 ◽  
pp. 64-65
Author(s):  
Toshihiro Omodaka ◽  
Masaki Morimoto ◽  
Noriyuki Kawaguchi ◽  
Yoshimi Kitamura ◽  
Minoru Tanaka ◽  
...  
Keyword(s):  
Line Emission ◽  
Active Galaxies ◽  
Broad Line ◽  
Urgent Problem ◽  
Massive Black Holes ◽  
High Resolution Mapping ◽  
Millimeter Wavelengths ◽  
Vlbi Observations ◽  
Resolution Mapping ◽  
Under Construction

VLBI observations of millimeter wavelengths can probe the broad line emission and jet forming regions of quasars, and the scale of an accretion disk around massive black holes in nearby active galaxies, which are self-absorbed at longer wavelengths. Therefore, the extension of the mm-VLBI network is timely and urgent problem. We are now planning to move Nobeyama 6 m mm VLBI telescope to Kagoshima. The telescope will be placed at Kinkohwan park in Kagoshima City in late 1992 and will be operated in 1993. The frequencies for VLBI observations will range from 22 GHz to 100 GHz.To date, there are two mm-VLBI facilities in Japan: Nobeyama 45 m and Kashima 34 m, However, the longest baseline is only about 200km EW which provides a fringe separation of 17 mas. This is not sufficient for high resolution mapping. A 10 m telescope which is under construction at Mizusawa, 400 km north from Kashima which will be usable up to 43 GHz and will add a north-south baseline, which is very important for astrometrie measurement.

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