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Browsing by Author "Jog, C. J"

Browsing by Author "Jog, C. J"

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  • Advanced mergers of galaxies: luminosity profiles and dynamics 
    Jog, C. J (Astronomical Society of India, 2005-06)
    We have analyzed the near-IR Ks-band data from the 2MASS archival database for a large sample of twenty-seven galaxies that show signs of interaction but have a single nucleus. Surprisingly, half of these advanced mergers ...
  • Dynamical effects of a cloud complex on stellar and HI components in a galaxy 
    Jog, C. J; Narayan, C. A (Astronomical Society of India, 2001)
    We investigate the dynamical effects of a molecular cloud complex with a mass ~ 107M? and a size of ~ few 100 pc, on the vertical distribution of stars and HI in a galactic disc. The complex has a strong local confining ...
  • Galaxy interactions, and the starburst galaxies - AGN connection. 
    Jog, C. J (Astronomical Society of India, 1995)
    Starbursts and Active Galactic Nuclei (AGN) are observed to preferentially occur in interacting or barred field galaxies. Galaxy interactions cause gas infall from the galactic disks, which may lead to the triggering of a ...
  • Local stability criterion for a two component galactic disk 
    Jog, C. J (Astronomical Society of India, 2000)
    The criterion for stability against local, axisymmetric perturbations in gravitationally coupled stars and gas in a galactic disk is obtained. The new feature is the inclusion of both stars and gas in the study, and a ...
  • Lopsided spiral galaxies 
    Jog, C. J (Astronomical Society of India, 2000)
    The light distribution in disks of many spiral galaxies is non-axisymmetric or 'lopsided' with a spatial extent much larger along one half of a galaxy than the other, as in M101. Recent observations show that 30% of spiral ...
  • Starbursts triggered by central overpressure in interacting galaxies 
    Mousumi Das; Jog, C. J (Astronomical Society of India, 1993)
    We present a triggering mechanism for starbursts in the central regions of interacting galaxies. As a disk giant molecular cloud (GMC) falls into the central region of a galaxy following a galaxy encounter, it may be ...
  • Swing amplification in stars and gas: Origin of local spirit structure in galaxies 
    Jog, C. J (Astronomical Society of India, 1993)
    We present a study of the growth of local, non-axisymmetric perturbations in gravitationally coupled stars and gas in differentially rotating galactic disk. The amplified perturbations in stars and gas constitute trailing, ...
  • Tidally compressed molecular gas in ultraluminous and early type galaxies 
    Das, M; Jog, C. J (Astronomical Society of India, 2000)
    The effect of the galactic tidal field is usually considered disruptive in the literature. However, in some cases its effect can become compressive. Using the virial theorem, we have determined the minimum density for a ...
  • Vertical scaleheights of stars and gas in the galaxy 
    Narayan, C. A; Jog, C. J (Astronomical Society of India, 2002-09)
    The vertical scaleheight of atomic hydrogen gas is observed to be nearly constant with radius in the inner Galaxy « 8.5 kpc). This has been a long-standing puzzle (Oort 1962) because the gas scaleheight should ...

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