Bibcode
DOI
Trapero, Joaquin; Beckman, John E.; Genova, Ricardo; McKeith, Conal D.
Bibliographical reference
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. 552-564.
Advertised on:
8
1992
Journal
Citations
17
Refereed citations
15
Description
The K I 7699-A resonance absorption line was used to observe a group of
18 early-type stars within a 200-pc radius of the sun with a
signal-to-noise ratio of 50-250. The interstellar absorptions provide a
way to 'tag' a cloud via its radial velocity to within +/-1.5 km/s.
Based on the hypothesis of pressure confinement, the temperatures of the
clouds are estimated at 100 K or less. The mass fraction of the local
interstellar medium (LISM) is found to be high in these clouds, at least
80 percent of the total, whereas the filling factor is low, well below
10 percent of the total LISM volume. One cloud with high densities and
lower temperatures was detected which is thought to be on the edge of
atomic-molecular equilibrium.