Depletion studies in the interstellar medium
subject: Extinction; ISM: abundances; ISM: dust
description: We report interstellar Si depletion and dust-phase column densities of Si along 131 Galactic sight lines using previously reported gas-phase Si II column densities, after correcting for the differences in oscillator strengths. With our large sample, we could reproduce the previously reported correlations between depletion of Si and average density of hydrogen along the line of sight () as well as molecular fraction of hydrogen (f(H2). We have also studied the variation of amount of Si incorporated in dust with respect to different extinction parameters. With the limitations we have with the quality of data, we could find a strong relation between the Si dust and extinction. While we cannot predict the density dependent distribution of size of Si grains, we discuss about the large depletion fraction of Si and the bigger size of the silicate grains. 2013 AIP Publishing LLC.
creator: Haris U.; Parvathi V.S.; Gudennavar S.B.; Murthy J.
source: AIP Conference Proceedings, Vol-1543, pp. 64-69.
date: 2013-01-01
rights: Restricted Access
relation: ISSN: 15517616; ISBN: 978-073541167-8
format: Online
language: English
type: Conference paper
coverage: Haris U., Department of Physics, Christ University, Bangalore-560 029, Karnataka, Hosur Road, India; Parvathi V.S., Department of Physics, Jain University, Bangalore - 560 011, Karnataka, 3rd Block, Jayanagar, India; Gudennavar S.B., Department of Physics, Christ University, Bangalore-560 029, Karnataka, Hosur Road, India; Murthy J., Indian Institute of Astrophysics, Bangalore- 560 034, Karnataka, II Block, Koramangala, India