IIA Institutional Repository

Browsing by Subject "Stellar dynamics"

Browsing by Subject "Stellar dynamics"

Sort by: Order: Results:

  • A Comprehensive Study of Five Intermediate-age Pismis (2, 3, 7, 12, 15) Clusters Using Photometric and Astrometric Data from Gaia EDR3 
    Bisht, D; Zhu, Qingfeng; Elsanhoury, W. H; Yadav, R. K. S; Rangwal, Geeta; Sariya, Devesh P; Durgapal, Alok; Jiang, Ing-Guey (American Astronomical Society, 2022-11-01)
    Open clusters are groups of stars that form simultaneously; hence, these are excellent probes to test theories of star formation, stellar evolution, and dynamics in the Milky Way disk. We carry out a detailed photometric ...
  • Cosmic Evolution of Black Holes and the M.—σ relation 
    Bhattacharyya, Dipanweeta (Indian Institute of Astrophysics, 2020-01)
    The connection of the SMBHs to their host galaxies is evidenced by the strong correlation between the mass of SMBH and velocity dispersion, σ, of the stars in rest of the galaxy. This is somewhat surprising because the ...
  • Cosmic Spin and Mass Evolution of Black Holes and Its Impact 
    Bhattacharyya, Dipanweeta; Mangalam, A (IOP Publishing, 2020-06-01)
    We build an evolution model of the central black hole that depends on the processes of gas accretion, the capture of stars, mergers, and electromagnetic torque. In the case of gas accretion in the presence of cooling ...
  • A Deep Investigation of Two Poorly Studied Open Clusters Haffner 22 and Melotte 71 in the Gaia era 
    Bisht, D; Zhu, Qingfeng; Yadav, R. K. S; Rangwal, Geeta; Sariya, Devesh P; Durgapal, Alok; Jiang, Ing-Guey (IOP Publishing, 2022-04)
    This paper presents a deep investigation of two open clusters, Haffner 22 and Melotte 71, using astrometric and photometric data from Gaia EDR3. We identified 382 and 597 most probable cluster members with membership ...
  • Internal motions in the open star clusters NGC 654 and 6087 
    Sagar, R; Bhatt, H. C (Astronomical Society of Indian, 1989-03)
    Proper motion measurements are used to study the internal kinematics in the open star clusters NGC 654 and 6087. It is found that intrinsic dispersions are independent of stellar mass and radial distance in both clusters. ...
  • Oscillations In Galaxies 
    Namboodiri, P. M. S (Kluwer Academic Publishers, 2000-01)
    Oscillations in galaxies have been investigated by numerical simulations. The various models used have density distributions corresponding to that of polytrope of index n in the range 0 ≤ n ≤ 4 and their evolution has been ...
  • Tidal effects on a satellite galaxy influenced by a massive perturber 
    Namboodiri, P. M. S; Cowsik, R; Sugimoto, D (Astronomical Society of India, 2000)
    The tidal influence on a satellite galaxy by a massive perturber is studied by numerical simulations. The satellite is modelled as a non-rotating spherical cluster of uniform density. The perturber is a galaxy described ...
  • Tidal interaction between a disc galaxy and a spherical galaxy 
    Zafarullah, S. N; Sastry, K. S (Astronomical Society of Indian, 1987)
    The tidal interaction between a disk and a Plummer model spherical galaxy is studied, extending the impulsive approximation theory to disk galaxies. The fractional change in the internal energy and merger velocities for ...
  • A Tidal model for the inetracting pair of galaxies VV 117 
    Narasimhan, K. S. V. S; Alladin, S. M (Astronomical Society of India, 1985-12)
    Limber`s (1965) tidal model for the interacting pair of galaxies VV 117 ( = Arp 143 = NGC 2444-45) is improved upon in the light of subsequent H I observations. It is proposed that the spiral Sc component is being disrupted ...

Search DSpace

Browse

My Account