SIMBAD references

2017MNRAS.464.4927S - Mon. Not. R. Astron. Soc., 464, 4927-4937 (2017/February-1)

The distribution and kinematics of interstellar O VI in the Milky Way.

SARMA R., PATHAK A., MURTHY J. and SARMA J.K.

Abstract (from CDS):

We present the results of a survey of interstellar O VI absorption in the Milky Way (MW) towards 69 stars in the Large Magellanic Cloud obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). The integrated MW O VI column densities log N(O VI) are in the range from 13.68 to 14.73 with a mean of 14.26–0.09+0.07 atoms cm–2. The O VI exponential scale height is found to be 2.28 ± 1.06 kpc. The O VI column density correlates with the Doppler parameter b. The O VI velocity dispersion ranges from 14.0 to 91.6 with an average value of 62.7 km s–1. These high values of the velocity dispersion reveal the effect of turbulence, multiple velocity components and collision on broad O VI profiles. There is a significant variation of the O VI column density on all scales studied (0 .0025-6 .35). The smallest scale for which O VI column density variations has been found is Δθ ∼ 9 arcsec. A comparison of the O VI velocity profiles with Fe II indicates the presence of intermediate-velocity cloud and/or high-velocity cloud components in the O VI absorption.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): ISM: atoms - ISM: galaxies: Milky Way - ISM: galaxies: Milky Way

Simbad objects: 76

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2020.01.27-13:59:16

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