Do the W44 and W28 molecular clouds show evidence of a shock

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160582· OSTI ID:6051469

DeNoyer, L K

OH and H i in the molecular cloud associated with W44 have been mapped, with 3' resolution. The optical depth maps support a cloud-remnant interaction. The line profiles show a multi-component structure, which can explain increased line widths adjacent to the remnant without the necessity for shock processing. The OH and H i excitation temperatures are 13 K and 99 K. These values do not exclude the possibility of shock interaction. Observations of HCO/sup +/, HCN, CS, N/sub 2/H/sup +/, OCS, and SO/sub 2/ in W44 and W28 are presented. There are no abundance enhancements in these molecules, relative to CO. A broad-velocity component of HCO/sup +/, HCN and CS seen in the W28 cloud may represent shocked material. At present, there is no firm evidence to support shock processing of the molecular clouds adjacent to either remnant.

• Research Organization: Center of Radiophysics and Space Research, Cornell University
• OSTI ID: 6051469
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 264:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
COSMIC RADIO SOURCES
H1 REGIONS
HYDROGEN COMPOUNDS
HYDROXIDES
INTERSTELLAR GRAINS
LINE WIDTHS
NEBULAE
OPACITY
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
SHOCK WAVES
SPECTRA
SUPERNOVA REMNANTS