Ultra-high-resolution observations of CH in Southern Molecular Cloud envelopes

Ultra-high-resolution observations of CH in Southern Molecular Cloud envelopes

We present a mini-survey of ultrahigh-resolution spectroscopy (UHRS) of CH towards three southern molecular cloud envelopes. The sightlines are selected to probe physically similar gas in different Galactic environments. With a velocity resolution of ∼0.5 km s−1(R=575 000) these observations resolve...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2002-08, Vol.334 (2), p.327-337
Hauptverfasser: Andersson, B-G., Wannier, P. G., Crawford, I. A.
Format: Artikel
Sprache:eng
Schlagworte:
ISM: individual: Chamaeleon
ISM: individual: Lupus
ISM: individual: Southern Coalsack
ISM: molecules
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Zusammenfassung:We present a mini-survey of ultrahigh-resolution spectroscopy (UHRS) of CH towards three southern molecular cloud envelopes. The sightlines are selected to probe physically similar gas in different Galactic environments. With a velocity resolution of ∼0.5 km s−1(R=575 000) these observations resolve most kinematic components of the absorption lines. We do, however, detect one line component in the Lupus region, which is not resolved and for which an upper limit of b
ISSN:0035-8711
1365-2966
DOI:10.1046/j.1365-8711.2002.t01-1-05465.x