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Browsing by Subject "Galaxy"

Browsing by Subject "Galaxy"

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  • Boundary to the solar system set by the Galaxy according to King-Innanen's formula 
    Rawal, J. J (Astronomical Society of Indian, 1986-03)
    A planet/comet-sun-Galaxy system is considered, under the assumption that the whole mass of the Galaxy is concentrated at its center, in order to find the limiting direct and retrograde orbits around the sun using ...
  • CCD photometry of the Wolf Rayet galaxy Mink 
    Singh, M; Sanwal, B. B; Stalin, C. S (Astronomical Society of India, 2000)
    We present here the results from B and V photometric observations of the Wolf Rayet galaxy Mink which was observed through the 104 cm telescope of U.P. State Observatory using 1K x 1K CCD. The surface brightness profiles ...
  • Chemical evolution of intermediate mass nuclei in the solar neighbourhood and the halo of the galaxy 
    Goswami, A; Prantzos, N (Astronomical Society of India, 2000)
    Recent observations of Fe group elements in very low metallicity stars show an evolutionary trend very different from that of Fe, implying divergent paths of chemical evolution for these elements. In the present work we ...
  • Classical Be stars in our Galaxy and the Magellanic Clouds 
    Subramaniam, A; Mathew, B; Paul, K. T; Mennickent, R. E; Sabogal, B (Astronomical Society of India, 2012)
    We summarise our studies of the Classical Be (CBe) stars in our Galaxy and in the Large and Small Magellanic Clouds. We studied their properties using optical and near-IR photometry and optical spectroscopy. The CBe stars ...
  • A deep focus on NGC 1883 
    Tadross, A. L (Astronomical Society of India, 2005-12)
    A deep photometric analysis in the open star cluster NGC 1883 has been presented here and added to the work of Carraro et al. (2003), which is the only previous work introduced for this cluster. The radius and metallicity ...
  • Design and analysis of an FUV spectrograph for a small satellite 
    Munshi, R; Prasad, B. R; Murthy, J (Astronomical Society of India, 2009-06)
    The Halo Ultraviolet Explorer (HUE) is a payload aimed at studying the diffuse far ultraviolet sky over a bandpass of 800 -- 1200 Ao. The novel features of HUE include a large effective collecting area (254 cm2) and fast ...
  • Distribution of Dark Matter in the Galaxy 
    Ratnam, Charu (Indian Institute of Astrophysics, Bangalore, 1998)
  • Galactic Age Estimates from O-rich Stardust in Meteorites 
    Nittler, L. R; Cowsik, R (The American Physical Society, 1997-01)
    The sup16Osup/17 supO and sup16O/sup18O ratios of refractory oxide grains extracted from primitive meteorites suggest that they originated in low-mass red giant stars prior to the formation of the Solar System 4.6×10/sup9 ...
  • Galaxy dynamics with small computers: Some results on tidal interactions. 
    Kochhar, R. K; Namboodiri, P. M. S (Springer Netherlands, 1995-06)
    Numerical simulations with a small computer have been performed to investigate the tidal influence of a larger galaxy on a smaller companion. A criterion is developed for disruption of the satellite galaxy. The behaviour ...
  • GMRT Neutral Hydrogen Observations of the Sombrero Galaxy 
    Sengupta, C; Balasubramanyam, R; Bekki, K (Astronomical Society of India, 2003)
  • A gravitational lens probe of galaxy-scale dark matter? 
    Sunita Nair (Astronomical Society of India, 1993)
    We present a model for an observed gravitationally lensed system, MG2016+112. We assume that there are two galaxies acting as lenses (as suggested by the observations), each with a diffuse dark matter halo. It is shown ...
  • Jan oort and interstellar clouds 
    Mallik, D. C. V (Indian Academy of Sciences, 1993-07-25)
  • The Luminosity Function and Size Distribution of HII Regions in NGC 1365 
    Ravindranath, S; Prabhu, T. P (Springer, 2001-03)
    We present the HII region luminosity function and size distribution obtained for the HII regions in NGC 1365. The diameters were corrected for the effects of seeing using a Wiener image restoration procedure. The luminosities ...
  • Mapping extinction using GALEX and SDSS photometric observations 
    Preethi, K; Gudennavar, S. B; Murthy, J (American Institute of Physics, 2013-06)
    The primary objective of this work is to create an all sky extinction map of the Milky Way galaxy. We have cross-matched the Sloan Digital Sky Survey (SDSS data release 8) photometric observations with that of Galaxy ...
  • The Mass Function of Young Star Clusters in our Galaxy and Nearby Galaxies: Is It Universal? 
    Sagar, R (International Astronomical union, 2002)
    Mass functions (MFs) derived from photometric observations of young star clusters of our Galaxy, the Magellanic Clouds (MCs), M31 and M33 have been used to investigate the question of universality of the initial mass ...
  • A maximum entropy method based scheme for the inversion of extended radio images in gravitationally lensed systems 
    Sunita Nair (Astronomical Society of India, 1993)
    A new scheme is advanced for the process of source reconstruction (or image inversion) from extended images in gravitationally lensed systems which show multiple imaging. We suggest that forward simulations of such systems ...
  • Multiwavelength Study of the NGC 281 Region 
    Sharma, S; Pandey, A. K; Pandey, J. C; Chauhan, N; Ogura, K; Ojha, D. K; Borrissova, J; Mito, H; Verdugo, T; Bhatt, B. C (Astronomical Society of Japan, 2012-10)
    We present a multiwavelength study of the NGC 281 complex which contains the young cluster IC 1590 at the center, using deep wide-field optical UBV Ic photometry, slitless spectroscopy along with archival data sets in ...
  • Near Infrared Survey of the Galactic Nuclear Bulge Region 
    Baliyan, K. S; Ganesh, S; Joshi, U. C; Glass, I. S (Astronomical Society of India, 2003)
    Inner 300 pc of the Galactic Center region is surveyed with the SIR-IUS camera mounted on the InfraRed Survey Facility (IRSF) telescope of the SAAO, during June-July 2002, resulting in the deepest near infrared view of the ...
  • Observational studies of planetary nebulae with moderate-size telescopes 
    Mallik, D. C. V (Astronomical Society of India, 1998)
  • Probable binary open star clusters in the Galaxy. 
    Subramaniam, A; Gorti, U; Sagar, R; Bhatt, H. C (EDP Science, 1995-10)
    The existence of double/binary clusters in the Magellanic Clouds is fairly well established, whereas only one such pair, h + χ Persei, is known in the Galaxy. From the catalogues of open clusters of the Galaxy, we have ...

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