IIA Institutional Repository

Browsing by Subject "Galaxies"

Browsing by Subject "Galaxies"

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  • Prabhu, R. D; Krishan, V (The American Physical Society, 1994-06)
    We have modeled the rotation curves of 21 galaxies observed by Amram et al. (1992), by combining the effects of rigid rotation, gravity, and turbulence. The main motivation behind such modeling is to study the formation ...
  • Mishra, A; Kantharia, N. G; Mousumi Das; Nimisha, G (Bulletin de la Societe Royale des Sciences de Liege, 2018-04)
    In this paper, we present radio observations of the giant low surface brightness (LSB) galaxies made using the Giant Metrewave Radio Telescope (GMRT). LSB galaxies are generally large, dark matter dominated spirals that ...
  • Ishwara-Chandra, C. H; Anantharamaiah, K. R; Dwarakanath, K. S (Astronomical Society of India, 2002-09)
    We report the GMRT detection of H I absorption in the high_ redshlft red quasar 30 190 at a redshift of 1.1946. The most interesting result is that the peak of the H I absorption is blueshifted by I'W 250 kms-1 with respect ...
  • Alladin, S. M (Astronomical Society of India, 1975-03)
  • Rengarajan, T. N; Ghosh, S. K; Verma, R. P (Astronomical Society of India, 1993)
    High resolution maps of nine spiral galaxies have been generated in the four IRAS bands using the High Resolution (HIRES) routine. These are used in conjunction with maps in H-alpha, CO, HI, radio continuum etc. to study ...
  • Sahu, D. K; Pandey, S. K; Kembhavi, A. K (Astronomical Society of India, 1996)
    We present the R band isophotal shape analysis of the E6 elliptical galaxy NGC 4564 by fittng ellipses to the observed isophotes using Fourier expansion procedure. The galaxy is found to have pointy isophotes, showing ...
  • Seal, P (Kluwer Academic Publishers, 1985-07)
    From IRAS (Infrared Astronomical Satellite) Circulars Nos. 4 to 15, 110 infrared sources have been identified. Out of these 110 identified sources 99 are galaxies, nine are nebulae, one is a dark object, and one is a ...
  • Prabhu, T. P; Pati, A. K (Indian Institute of Astrophysics, 1990-04)
  • Lata, S; Pandey, A. K; Sagar, R; Mohan, V (E D P Sciences, 2002-06)
    Integrated UBVRI photometric parameters of 140 galactic open clusters have been computed. Integrated I(V-R)0 and I(V-I)0 colours as well as integrated parameters for 71 star clusters have been obtained for the first time. ...
  • Venugopal, V. R; Narasimhan, K. S. V. S (Astronomical Society of India, 1993-06)
    A statistical study of the far infrared and microwave (lambda 6.3 cm ) lumnosities of a sample of isolated pairs of spiral galaxies and a comparison sample on non-interacting galaxies selected from the lists given by ...
  • Das, M (Astronomical Society of India, 2000)
    In more than half of all observed spiral galaxies, the central molecular gas is distributed in a bar. Since gas is a dissipative fluid, it will tend to settle along closed orbits in the plane of a galaxy. Simulations of ...
  • 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 ...
  • 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 ...
  • Subramanian, K (Astronomical Society of India, 2002-09)
    Magnetic fields correlated on kiloparsec scales are seen in spiral galaxies. Their origin ~ould be due to amplification of a small seed field by a turbulent galactic dynamo. We review the current status of the galactic dynamo, ...
  • Ballabh, G. M; Alladin, S. M (Astronomical Society of India, 2000)
    In a binary globular cluster the tidal forces increase the internal energy of the clusters and may lead to either merger or disruption of a cluster depending upon whether the two clusters are !of equal mass or vary much ...
  • Alladin, S. M (Astronomical Society of India, 1978-06)
  • Ghosh, S. K (Astronomical Society of India, 2000)
    Several Galactic H II region complexes have been observed in the far infrared (FIR) wavebands using the TIFR 1-m balloon borne telescope, and in the mid infrared (MIR) using the Infrared Space Observatory (ISO). Many of ...
  • Prabhu, T. P (Indian Academy of Sciences, 1985)
    Milder forms of activity in the nuclear regions of galaxies are reviewed. Three classes of activity are identified, namely starbursts, high-excitation emission-line and low-ionization emission-line nuclei. Sérsic perinuclear ...
  • Lal, D. V; Shastri, P; Gabuzda, D. C (EDP Sciences, 2004-10)
    We have obtained mas-scale resolution very long baseline interferometry (VLBI) images of a sample of Seyfert 1 and Seyfert 2 galaxies at 5 GHz (wavelength, lamda = 6 cm). The Seyferts of the two types were chosen to be ...
  • Prabhu, R. D; Krishan, V (Astronomical Society of India, 1993)
    Helical hydrodynamic turbulence can magnify perturbation seed eddies and this can lead to the appearance of large scale structures. The evolution of the instability is accompanied by a transfer of energy from small scale ...

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