Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Zasov, A. V."'
Publikováno v:
Astronomy Reports, Vol. 66, No. 9, pp. 755-765, 2022
The content of gas in galaxies with an anomalously high relative mass of hydrogen $M_{HI}/M_*$ for a given mass of the stellar population $M_*$ (VHR-galaxies) is considered, using the available samples of such galaxies. It is shown that, within the o
Externí odkaz:
http://arxiv.org/abs/2211.14001
Autor:
Zasov, Anatoly V., Saburova, Anna S., Egorov, Oleg V., Lander, Vsevolod Yu., Makarov, Dmitry I.
We study two M 51-type systems Arp 68 and Arp 58, which strongly differ by their stellar masses, gas content and environment. Long-slit spectral observations obtained at the 6-m telescope BTA were used to trace the distributions of a line-of-sight (L
Externí odkaz:
http://arxiv.org/abs/2207.14214
Spiral structure (both flocculent and Grand Design types) is very rarely observed in dwarf galaxies because the formation of spiral arms requires special conditions. In this work we analyze the sample of about 40 dS-galaxies found by scanning by eye
Externí odkaz:
http://arxiv.org/abs/2108.04624
We study a peculiar galaxy NGC 90, a pair member of interacting system Arp 65 (NGC 90/93), using the long-slit spectral observations carried out at the Russian 6m telescope BTA and the available SDSS photometric data. This galaxy demonstrates two tid
Externí odkaz:
http://arxiv.org/abs/2007.09432
Autor:
Zobnina, D. I., Zasov, A. V.
Publikováno v:
Astronomy Reports, 2020, Vol. 64, No. 4, pp. 295-309
A sample of 22 spiral galaxies compiled from published data is studied. The galaxy rotation curves pass through a maximum distance of more than $\sim 1$ kpc from the center with a subsequent decrease in the rotation velocity. The galaxy position in t
Externí odkaz:
http://arxiv.org/abs/2003.08845
We study three Arp' systems of peculiar galaxies: Arp 42 (NGC 5829), Arp 82 (NGC 2535/36) and Arp 58 (UGC 4457), using the long-slit spectral observations carried out at the 6m telescope BTA of Special Astrophysical Observatory. Arp 82 and Arp 58 are
Externí odkaz:
http://arxiv.org/abs/1904.03150
We present the results of optical long-slit spectral observations of interacting system Arp305 carried out at the 6m telescope BTA at the SAO RAS: the radial variation of gas kinematics and oxygen abundance. This study continues the series of spectra
Externí odkaz:
http://arxiv.org/abs/1804.07503
Publikováno v:
Physics-Uspekhi, Volume 60, Issue 1, pp. 3 (2017) (http://adsabs.harvard.edu/abs/2017PhyU...60....3Z)
Dark matter in galaxies, its abundance, and its distribution remain a subject of long-standing discussion, especially in view of the fact that neither dark matter particles nor dark matter bodies have yet been found. Experts' opinions range from a ve
Externí odkaz:
http://arxiv.org/abs/1710.10630
We examine the dependence between hydrogen total mass $M_{HI}$ and rotation speed $V_{rot}$, optical size $D_{25}$ or disc radial scale $R_0$ for two samples of late-type galaxies: a) isolated galaxy (AMIGA sample), and b) the edge-on galaxies (flat
Externí odkaz:
http://arxiv.org/abs/1705.07659
We performed long-slit spectral observations of two SB-type galaxies: NGC 5347, UGC 1344. They were previously suspected as the galaxies with unusually low mass-to-light ratios (on the ground of mass estimates from the Hi linewidths), which are in co
Externí odkaz:
http://arxiv.org/abs/1705.04629