• F. N. Owen

      Articles written in Journal of Astrophysics and Astronomy

    • GMRT detection of HI 21 cm-line absorption from the peculiar galaxy in Abell 2125

      K. S. Dwarakanath F. N. Owen

      More Details Abstract Fulltext PDF

      Using the recently completed Giant Meterwave Radio Telescope, we have detected the HI 21 cm-line absorption from the peculiar galaxy C153 in the galaxy cluster Abell 2125. The HI absorption is at a redshift of 0.2533, with a peak optical depth of 0.36. The full width at half minimum of the absorption line is 100 km s−1. The estimated column density of atomic Hydrogen is 0.7×1022(Ts/100) cm−2. The HI absorption is redshifted by ∼400km s−1 compared to the [OIII] emission line from this system. We attribute this to an infalling cold gas or to an out-flowing ionised gas, or to a combination of both as a consequence of tidal interactions of C153 with either a cluster galaxy or the cluster potential.

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      Posted on January 27, 2016

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      Posted on July 25, 2019

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