Estimation of CII and CII* column densities along Galactic sight-lines

Veena S. Parvathi1*, Ulysses J. Sofia2, Jayant Murthy3 and B.R.S. Babu1
1Department of Physics, University of Calicut, Kerala 673635, India
2Department of Physics, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
3 Indian Institute of Astrophysics, Bangalore 560034, India

Abstract. We present interstellar CII (1334.5323 \AA) and CII* (1335.7077 \AA) column density measurements along 14 Galactic sight-lines. These sight-lines sample a variety of Galactic disk environments and include paths that range nearly two orders of magnitude in average hydrogen densities ($<$n(H)$>$) along the lines of sight. Five of the sight-lines show super-Solar gas phase abundances of carbon. Our results show that the excess carbon along these sight-lines may result from different mechanisms taking place in the regions associated with these stars.

Keywords:line: profiles -- ISM: clouds -- ISM: abundances -- ultraviolet: ISM

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