L 1780: a cometary globule associated with Loop I?

Details L 1780: a cometary globule associated with Loop I? L 1780: a cometary globule associated with Loop I?

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...295..755t&link_type=abstract

Astronomy and Astrophysics, v.295, p.755

Astronomy and Astrophysics

Astrophysics

9

Ism: Clouds, Ism: Molecules, Ism: Objects: L 1780, Ism: Loop I, Radio Lines: Ism

Scientific paper

^12^CO, ^13^CO and C^18^O J=1->0 observations of the L1778/L 1780 high latitude (b=36.7deg) dark cloud have been carried out using the Gornergrat 3m and SEST 15m telescopes. The observations revealed a cometary cloud structure: a dense core asymmetrically surrounded by a diffuse outer layer. The mass of the cloud calculated from the CO observations is 21.6Msun_. The compact ^13^CO core has a mass of 8.3Msun_ and is found to be in virial equilibrium. The CO data have been compared to previous optical, Hi, and IRAS observations. We suggest that the structure and the morphology of L 1780 have been influenced by two large scale environmental effects: (1) the asymmetric interstellar UV radiation field and (2) a shock front, both caused by the high mass stars of the Sco - Cen OB association.

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