A very dense H I filament within the Local Hot Bubble

Details A very dense H I filament within the Local Hot Bubble A very dense H I filament within the Local Hot Bubble

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261l...9w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 1, p. L9-L12.

Astronomy and Astrophysics

Astrophysics

16

H I Regions, Milky Way Galaxy, Absorption Spectra, Radiative Transfer, Sodium, X Ray Spectra

Scientific paper

We present H I observations and a distance determination from interstellar Na I D absorption lines of the dense filament LVC 88+36-2. The H I observations reveal strong 21-cm emission lines of very low velocity dispersion. All of our Na I D spectra toward suitable stars have strong absorption lines coincident with the H I emission, setting an upper distance limit of (60 +/- 20) pc. Since the Local Hot Bubble has a radius of about 100 pc in this direction, we conclude that LVC 88+36-2 is located within the bubble. A shadow of the filament, found in the diffuse soft X-ray background, can be used to analyze the location of the soft X-ray emission.

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