SIMBAD references

2003ApJ...586L..53O - Astrophys. J., 586, L53-L56 (2003/March-3)

The Far Ultraviolet Spectroscopic Explorer detection of galactic O VI emission in the halo above the Perseus arm.


Abstract (from CDS):

Background observations obtained with the Far Ultraviolet Spectroscopic Explorer toward l=95°.4, b=36°.1 show O VI λλ1032, 1038 in emission. This sight line probes a region of stronger than average soft X-ray emission in the direction of high-velocity cloud Complex C above a part of the disk in which Hα filaments rise into the halo. The O VI intensities, 1600±300 photons.s–––1 (1032 Å) and 800±300 photons.s–––1 (1038 Å), are the lowest detected in emission in the Milky Way to date. A second sight line nearby (l=99°.3, b=43°.3) also shows O VI λ1032 emission but with too low a signal-to-noise ratio to obtain reliable measurements. The measured intensities, velocities, and FWHMs of the O VI doublet and the C II* line at 1037 Å are consistent with a model in which the observed emission is produced in the Galactic halo by hot gas ejected by supernovae in the Perseus arm. An association of the observed gas with Complex C appears unlikely.

Abstract Copyright:

Journal keyword(s): Galaxy: Halo - Galaxy: Kinematics and Dynamics - Galaxy: Structure - ISM: General - ISM: Kinematics and Dynamics - ISM: Structure

Simbad objects: 6

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