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8 papers · 2 filters
Variability in Spectropolarimetric properties of Sy 1.5 galaxy Mrk 6
V. L. Afanasiev, L. C. Popovic, A. I. Shapovalova +2
Here we present an analysis of spectro-polarimetric observations of type 1.5 AGN Mrk 6, performed with 6m telescope SAO RAN in 12 epochs (2010 -- 2013). Additionally, the inter-ste…
Polarized synchrotron radiation from the Andromeda Galaxy M31 and background sources at 350 MHz
René Gießübel, George Heald, Rainer Beck +1
Polarization measurements at low radio frequencies allow detection of small Faraday rotation measures caused by regular magnetic fields in galaxies and in the foreground of the Mil…
Pitch angle variations in spiral galaxies
S. S. Savchenko, V. P. Reshetnikov
We present a detailed photometric study and measurements of spiral arm pitch angles for a sample of 50 non-barred or weakly barred grand-design spiral galaxies selected from Sloan…
Spectral optical monitoring of a double-peaked emission line AGN Arp 102B: I. Variability of spectral lines and continuum
A. I. Shapovalova, L. C. Popovic, A. N. Burenkov +14
Here we present results of the long-term (1987-2010) optical spectral monitoring of the broad line radio galaxy Arp 102B, a prototype of active galactic nuclei with the double-peak…
Bending instability in galactic discs. Advocacy of the linear theory
S. A. Rodionov, N. Ya. Sotnikova
We demonstrate that in N-body simulations of isolated disc galaxies there is numerical vertical heating which slowly increases the vertical velocity dispersion and the disc thickne…
Properties of the most metal-poor gas-rich LSB dwarf galaxies SDSS J0015+0104 and J2354-0005 residing in the Eridanus void
S. A. Pustilnik, J. -M. Martin, Y. A. Lyamina +1
SDSS J0015+0104 is the lowest metallicity low surface brightness dwarf (LSBD) galaxy known. The oxygen abundance in its HII region SDSS J001520.70+010436.9 (at ~1.5 kpc from the ga…