Study of CO in Lynds 134

Journal Article · Thu Jul 01 04:00:00 EDT 1976 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/111913· OSTI ID:7175639

Mahoney, M J; McCutcheon, W H; Shuter, W L.H.

Observations of the J=1..-->..0 transitions of /sup 12/C/sup 16/O, /sup 13/C/sup 16/O, /sup 12/C/sup 18/O were made for the dark dust cloud Lynds 134 using the 4.6-m telescope at Aerospace Corporation. Results indicate that within the dust cloud there are four molecular clouds with radial velocities of +0.1, +0.7, +2.7, +4.00.3 km sec/sup -1/ with respect to the local standard of rest, of which the two at +0.7 and +2.7 km sec/sup -1/ are most prominent. These two clouds are approximately isothermal, with excitation temperature approx.12 K. A comparison of the CO data with 21-cm line data indicates that these two clouds coincide in position, velocity, and linewidth with 21-cm absorption features. The ratio H/H/sub 2/ in the +2.7-km sec/sup -1/ cloud is estimated to be > or =7.7 x 10/sup -3/. We only attempted to map /sup 12/C/sup 18/O in the cloud at +2.7 km sec/sup -1/ and there the ratio of /sup 13/C/sup 16/O//sup 12/C/sup 18/O is approx.6.5. (AIP)

• Research Organization: Department of Physics, University of British Columbia, Vancouver, Canada
• OSTI ID: 7175639
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 81:7; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ABUNDANCE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COSMIC DUST
COSMIC RADIO SOURCES
DUSTS
H1 REGIONS
INTERSTELLAR GRAINS
MOLECULES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SPECTRA