Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Jog, Chanda J."'
Autor:
Sarkar, Suchira, Jog, Chanda J.
We calculate ab initio the gravitational potential energy per unit area for a gravitationally coupled multi-component galactic disk of stars and gas, which is given as the integration over vertical density distribution, vertical gravitational force,
Externí odkaz:
http://arxiv.org/abs/2207.09393
Autor:
Ghosh, Soumavo, Jog, Chanda J.
Publikováno v:
A&A 658, A171 (2022)
A typical galactic disc has a finite thickness and in addition to stars it also contains a finite amount of interstellar gas. Here, we investigate the physical impact of the finite thickness of a galactic disc on the disc stability against the non-ax
Externí odkaz:
http://arxiv.org/abs/2111.10893
Publikováno v:
Monthly Notices of the Royal Astronomical Society, April 2022, Volume 511, Issue 4, pp.5878-5896
An $m=1$ lopsided asymmetry is common in disc galaxies. Here, we investigate the excitation of an $m=1$ lopsidedness in host galaxies during minor mergers while choosing a set of 1:10 merger models (with varying orbital configurations, morphology of
Externí odkaz:
http://arxiv.org/abs/2105.05270
Autor:
Sarkar, Suchira, Jog, Chanda J.
Publikováno v:
MNRAS, 499, 2523 (2020)
The vertical density distribution of stars in a galactic disc is traditionally obtained by assuming an isothermal vertical velocity dispersion of stars. Recent observations from SDSS, LAMOST, RAVE, Gaia etc show that this dispersion increases with he
Externí odkaz:
http://arxiv.org/abs/2009.10097
Publikováno v:
2020, MNRAS, 492, 2517
The study of gas-dust interactions occurring in the interstellar medium of a galaxy is essential for understanding various physical processes taking place within it. A comparison of such events at different locations corresponding to diverse astrophy
Externí odkaz:
http://arxiv.org/abs/2001.00168
Autor:
Sarkar, Suchira, Jog, Chanda J.
The self-consistent vertical density distribution in a thin, isothermal disc is typically given by a sech^2 law, as shown in the classic work by Spitzer (1942). This is obtained assuming that the radial and vertical motions are decoupled and only the
Externí odkaz:
http://arxiv.org/abs/1912.08829
Autor:
Patra, Narendra Nath, Jog, Chanda J
We examine the HI total intensity maps of the VLA LITTLE-THINGS galaxies and identify an HI bar in the dwarf irregular galaxy DDO 168 which has a dense and compact dark matter halo that dominates at all radii. This is only the third galaxy found to h
Externí odkaz:
http://arxiv.org/abs/1908.00023
Autor:
Sarkar, Suchira, Jog, Chanda J.
Publikováno v:
A&A 628, A58 (2019)
We theoretically study the vertical structure of the edge-on low surface brightness (LSB) galaxy UGC 7321. This is one of the few well-observed LSBs. We modeled it as a gravitationally coupled disk system of stars and atomic hydrogen gas in the poten
Externí odkaz:
http://arxiv.org/abs/1905.02735
Autor:
Sarkar, Suchira, Jog, Chanda J
Publikováno v:
A&A 617, A142 (2018)
We study the vertical stellar distribution of the Milky Way thin disk in detail with particular focus on the outer disk. We treat the galactic disk as a gravitationally coupled, three-component system consisting of stars, atomic hydrogen gas, and mol
Externí odkaz:
http://arxiv.org/abs/1808.02047
Autor:
Ghosh, Soumavo, Jog, Chanda J.
Publikováno v:
A&A 617, A47 (2018)
A typical galactic disk is observed to have a finite thickness. Here, we present the study of the physical effect of introduction of finite thickness on the generation of small-scale spiral arms by swing amplification in a differentially rotating gal
Externí odkaz:
http://arxiv.org/abs/1806.01439