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Browsing by Subject "Galaxies"

Browsing by Subject "Galaxies"

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  • Modern astronomy : startling facts 
    Sivaram, C; Arun, K (Ane Books, 2009)
    The year 2009 is being recognised as the international year of astronomy (IYA) to mark the four hundredth anniversary of the historical occasion in the year 1609 when Galileo Galilei used the then newly invented telescope ...
  • Molecular Clouds: Cosmic distilleries 
    Churchwell, Ed (Astronomical Society of India, 1983-09)
  • Mond, dark matter and the cosmological constant 
    Sivaram, C (Springer, 1994-09)
    A possible connection between MOND (Modification of Newtonian Dynamics) proposed as an alternative hypothesis to dark matter in galaxies and clusters and a residual cosmological constant term dominating cosmological dynamics ...
  • Multicolour broadband study of a lenticular galaxy : NGC 4753 
    Dewangan, G. C; Singh, K. P; Bhat, P. N (Astronomical Society of India, 2000)
    Based on VBT observations, we report multicolour broadband study of a lenticular galaxy, NGC 4753 with prominent dust lanes. The extinction curve derived for NGC 4753 is similar to the Galactic extinction curve. The dust ...
  • Multicolour surface photometry of galaxies : Mrk 35 and Mrk 799 
    Chitre, A; Joshi, U. C; Srivastava, J. B (Astronomical Society of India, 1996)
    Imaging photometry of two peculiar galaxies Mrk 35 and Mrk 799 has been carried out using a CCD camera and broad band filters. Both the galaxies are highly disturbed and the morphologies of the galaxies are quite complex. ...
  • N-body simulations of galaxy collisions 
    Namboodiri, P. M. S; Sastry, K. S; Narasimhan, K. S. V. S (Astronomical Society of India, 2001)
    The tidal effects of close collisions between two spherical galaxies of different mass and mass distributions are studied by numerical simulations. The galaxies are represented by polytropes of indices n = 4 and n = 0 which ...
  • Near-Infrared and Optical Morphology of the Dusty Galaxy NGC 972 
    Mayya, Y. D; Ravindranath, S; Carrasco, L (The American astronomical Society, 1998-10)
    Near-infrared (NIR) and optical surface photometric analyses of the dusty galaxy NGC 972 are presented. The photometric profiles in the BVRJHK bands can be fitted with a combination of Gaussian and exponential profiles, ...
  • A new star formation rate for disk galaxies 
    Pandey, U. S (Astronomical Society of India, 1998-12)
  • Notes for the Observer 
    Prabhu, T. P (Astronomical Society of India, 1983-12)
  • Notes for the Observer 
    Prabhu, T. P (Astronomical Society of India, 1984-06)
  • Observational studies of hydrogen-deficient stars for investigating their evolutionary connections 
    Hema, B. P (Indian Institute of Astrophysics, 2014-04)
    The group of hydrogen-deficient (H-deficient) and carbon rich supergiants spanning a range in their effective temperatures are: hydrogen deficient carbon (HdC) stars, R Coronae Borealis (RCB) stars, and extreme helium ...
  • Observing the GRB remnants 
    Bhargavi, S. G; Cowsik, R; Perna, R (Astronomical Society of the Pacific, 2004-06)
    Following the predictions of Perna, Reymond & Loeb (2000) we have proposed an observational program to search for the GRB remnants in nearby galaxies using the telescopes of Indian Institute of Astrophysics, Bangalore. We ...
  • On a connection between supernova occurrence and tidal interaction in early type galaxies 
    Kochhar, R. K (International Astronomical Union, 1990-11)
    There are three types of supernovae: two subtypes SNIa and Ib; and SNII. Late type galaxies produce all types of SN, whereas early types (E, SO, and non-Magellanic irregulars IO) have hosted only SNIa. The recently identified ...
  • On the Hubble diagram of QSOs with cosmological redshifts 
    Sapre, A. K; Mishra, V. D (Astronomical Society of India, 1996)
    In this paper we study the Hubble Diagram of the QSOs whose redshifts are known to be cosmological in nature. These are the QSOs which lie close to bright galaxies and whose redshifts are nearly equal to those of the bright ...
  • Optical Microvariability of Blazars 
    Ghosh, K. K; Kim, C; Ramsey, B. D; Soundararajaperumal, S (Korean Astronomical Society, 2001-04)
    We present the results of optical differential photometry of five blazars [PKS 0219+428(3C66A), PKS 0235+164(AO 0235+16), H0414+019, PKS 0851+202(OJ 287), and QSO 1807+698(3C371)] that were observed on 7 nights between ...
  • Optical Nuclei of Radio-loud AGN and the Fanaroof-Riley Divide 
    Kharb, P; Shastri, P (EDP Sciences, 2004-10)
    We investigate the nature of the point-like optical nuclei that have been found in the centres of the host galaxies of a majority of radio galaxies by the Hubble Space Telescope. We examine the evidence that these optical ...
  • Optical spectroscopy of SN1998S 
    Anupama, G. C; Pandey, G; Sivarani, T (Astronomical Society of India, 2000)
  • Optical to Far-IR Observations of 3C 446 
    Leech, K. J; Saxton, R; Barr, P; Santos-Lleo, M; Jiminez-Bailon; Soundararajaperumal, S (Astronomical Society of Australia, 2002)
    The OVV blazar 3C 446 was monitored over seven months in 1997 with ground based telescopes and instruments on ESA's Infrared Space Observatory (ISO). The aim was to try to detect variations in the IR and see if these were ...
  • Oscillations In Galaxies 
    Namboodiri, P. M. S (Springer, 2000-02)
    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 ...
  • 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 ...

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