scholarly journals Signs of Interaction of the NGC 1275 Nucleus with the High-Velocity System According to 0,″7 Seeing Observations

1990 ◽  
Vol 124 ◽  
pp. 421-429
Author(s):  
V. N. Dudinov ◽  
V. S. Tsvetkova ◽  
S. B. Novikov ◽  
I. I. Pronik
Keyword(s):  
Central Asia ◽  
High Velocity ◽  
Seyfert Galaxy ◽  
Low Contrast ◽  
Ngc 1275

AbstractThe nucleus of the Seyfert galaxy NGC 1275 was observed in the B system on 12-1-1989 with seeing 07 using the Zeiss-1000 telescope on Mount Majdanak in Central Asia. Special methods of processing reveal low-contrast details. The nucleus and circumnucleus are stretched in NW-SE direction. There are two narrow filaments near the nucleus in position angles roughly 340° and 320°. The first is directed near the radio jet of the nucleus, the second has broken details curved to the NW or toward the high-velocity system of NGC 1275.

Investigation of the nuclear region of the Seyfert galaxy NGC 1275

Astrophysics ◽  
1984 ◽  
Vol 21 (2) ◽  
pp. 470-478 ◽  
Author(s):  
L. P. Metik ◽  
I. I. Pronik
Keyword(s):  
Seyfert Galaxy ◽  
Nuclear Region ◽  
Ngc 1275

scholarly journals Integral Field Spectrography of Active Galaxies with TIGER

1997 ◽  
Vol 159 ◽  
pp. 343-346
Author(s):  
P. Ferruit ◽  
E. Pécontal ◽  
G. Adam ◽  
R. Bacon
Keyword(s):  
Seyfert Galaxy ◽  
Active Galaxies ◽  
Data Cube ◽  
Complex Object ◽  
Integral Field Spectrograph ◽  
Deconvolution Techniques ◽  
Ngc 1275 ◽  
Integral Field

AbstractThe TIGER integral field spectrograph has been used to study nearby and distant active galaxies. We first present new TIGER observations of the Seyfert galaxy NGC 1275. In this very complex object, TIGER allows us to disentangle the contributions of the numerous components. We present the first very promising results on NGC 5252 obtained with the 3-D data-cube deconvolution techniques developed by our team in Lyon.

scholarly journals Some Peculiarities of Variable Optical Spectra of 11 Low-Redshift Quasars

1994 ◽  
Vol 159 ◽  
pp. 518-518
Author(s):  
I.I. Pronik
Keyword(s):  
Seyfert Galaxy ◽  
Optical Spectra ◽  
The Other ◽  
Bench Mark ◽  
Published Data ◽  
First Report ◽  
Ngc 1275 ◽  
Very High ◽  
Calibration Coefficients ◽  
The Continuum

The flux of narrow 5007 Å [OIII] forbidden line during last 20 years is accepted as a bench-mark for calibration of the continuum and broad-lines fluxes in AGN. But one can not get away from the problem of the forbidden lines variability in these objects. The first report were published by Bardin et al. (1967). Some of the results are revieved by V. Pronik, I. Pronik (1988, 1992). There were 4 years monitoring of [OIII] fluxes variability in the Seyfert galaxy NGC 1275 nucleus (Pronik et al., 1990). Now we reexamine the published data of W. Zheng et al. (1986, 1987, 1988), discussed earlier in supposition of forbidden lines constant in spectra of 11 low-redshifted QSOs. Maximal calibration coefficients adopted by W. Zheng et al. in supposition of [OIII] lines constant were in the interval 2.0–3.6. On the other hand the fluxes errors are about 15%. Disagreement is very high. This is one of the arguments in the forbidden lines variability Tightness.

High Velocity Outflow in the Extended Emission-Line Region of the Seyfert Galaxy NGC 7319

1996 ◽  
Vol 111 ◽  
pp. 140 ◽  
Author(s):  
Kentaro Aoki ◽  
Hiroshi Ohtani ◽  
Michitosh Yoshida ◽  
George Kosugi
Keyword(s):  
Emission Line ◽  
High Velocity ◽  
Seyfert Galaxy ◽  
Line Region ◽  
Extended Emission

Global VLBI Observations of the High‐Velocity HiAbsorption toward NGC 1275

2002 ◽  
Vol 566 (1) ◽  
pp. 195-201 ◽  
Author(s):  
E. Momjian ◽  
J. D. Romney ◽  
T. H. Troland
Keyword(s):  
High Velocity ◽  
Vlbi Observations ◽  
Ngc 1275

scholarly journals Hot Shocked Gas Along the Helical Jets of NGC 4258

1995 ◽  
Vol 149 ◽  
pp. 118-122
Author(s):  
G. Cecil
Keyword(s):  
High Velocity ◽  
Seyfert Galaxy ◽  
Molecular Gas ◽  
X Ray ◽  
Fabry Perot

AbstractI summarize the results of our multifrequency study of the helically twisted jets in the Seyfert galaxy NGC 4258. [N II], Hα, and [O III] Fabry-Perot datacubes obtained with the HIFI system on the U. Hawaii 2.2m telescope form the basis of this work. ROSAT x-ray multiband images (HRI & PSPC), CO spectra, and unpublished VLA 6 and 20 cm maps are correlated with these spectral grids. Together these data reveal clear signatures of high-velocity (> 300 km s−1) shocks along the jets that suggest efficient entrainment of ambient molecular gas.

Two-dimensional photometry of the nuclear region in the Seyfert galaxy NGC 1275

Astrophysics ◽  
1986 ◽  
Vol 23 (3) ◽  
pp. 634-638
Author(s):  
L. P. Metik ◽  
I. I. Pronik
Keyword(s):  
Seyfert Galaxy ◽  
Two Dimensional ◽  
Nuclear Region ◽  
Ngc 1275

scholarly journals Variability of the Emission Line Spectrum of the Nucleus of Seyfert Galaxy NGC 1275

1974 ◽  
Vol 58 ◽  
pp. 341-345
Author(s):  
I. Pronik
Keyword(s):  
Emission Line ◽  
Seyfert Galaxy ◽  
Emission Lines ◽  
Line Spectrum ◽  
Spectroscopic Observations ◽  
Emission Line Spectrum ◽  
Ngc 1275

Recent spectroscopic observations of the nucleus of NGC 1275, together with results from earlier workers, confirm the variability of the emission lines and indicate corresponding variations in the electron temperatures and densities of different zones. These changes may be associated with the microwave outbursts from this source.

Fabry-Perot images of NGC 1275 and its puzzling high-velocity system

1992 ◽  
Vol 388 ◽  
pp. 301 ◽  
Author(s):  
Adeline Caulet ◽  
Bruce E. Woodgate ◽  
Larry W. Brown ◽  
Theodore R. Gull ◽  
Paul Hintzen ◽  
...  
Keyword(s):  
High Velocity ◽  
Fabry Perot ◽  
Ngc 1275
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