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Browsing Publications of Astronomical Society of India by Subject "Absorption lines"

Browsing Publications of Astronomical Society of India by Subject "Absorption lines"

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  • Analysis of Ly α absorption lines in the vicinity of QSOs 
    Khare, P (Astronomical Society of India, 1996)
    Recent evidence suggesting that at least some of the Lyman alpha forest absorbers are not primordial and are indeed associated with galaxies is disucussed. Proximity effect, which deals with the change in the distribution ...
  • Behaviour of some neutral molecular absorption lines in facula models 
    Tripathi, B. M; Sinha, K; Pande, M. C (Astronomical Society of India, 1982-12)
    The equivalent widths of some selected absorption lines of C2, Ch, MgH, NH, OH and SH molecules in five facula and two photospheric models have been calculated under the assumption of LTE. The calculations reveal that the ...
  • Evolution of metals and dust in the universe 
    Khare, P; Kulkarni, V. P; Lauroesch, L. T; Fall, S. M; York, D. G; Welty, D. E; Crotts, A. P. S; Truran, J. W; Nakamura, O (Astronomical Society of India, 2005-06)
    With the aim of determining the evolution of metals and dust in the universe, we have observed 8 Damped Lyman-alpha Absorbers (DLAs) with the Multiple Mirror Telescope and the Hubble Space Telescope at 0:1 < z < 1:5, ...
  • GMRT detection of H I absorption in the high-redshift red quasar 3C 190 
    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 ...
  • Quasar absorption lines 
    Khare, Pushpa (Astronomical Society of India, 1995)
    Quasar absorption lines are an important tool to probe the universe at high redshifts, as they enable us to observe galaxies and intergalactic clouds at large distances, which are virtually inaccessible otherwise. This ...

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