VLA observations of the high-velocity bipolar OH absorption in L1551

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167142· OSTI ID:6018328

Rodriguez, L F; Canto, J; Mirabel, I F; Ruiz, A

The VLA was used to map the high-velocity 1667 MHz OH absorption in L1551. The OH shows the same bipolar geometry seen in CO. The OH absorption is detected along the NW edge of the SW lobe and along the SE edge of the NE lobe, indicating that the high-velocity OH is located in the walls of the bipolar cavities created by the wind of L1551 IRS 5. The OH is detected only at the end of the bipolar lobes. It is suggested that this peculiar spatial distribution is due to an OH enhancement in the outer parts of the outflow as shock-produced H2O is photodissociated by the interstellar UV radiation field. 28 references.

• Research Organization: Universidad Nacional Autonoma de Mexico, Mexico City; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA); Universidad de Puerto Rico, San Juan; California Institute of Technology, Pasadena (USA)
• OSTI ID: 6018328
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 337; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DISSOCIATION
DISTRIBUTION
ELECTROMAGNETIC RADIATION
HYDROXYL RADICALS
INTERSTELLAR SPACE
MAPS
MORPHOLOGY
NEBULAE
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADICALS
SPACE
SPATIAL DISTRIBUTION
SPECTRA
ULTRAVIOLET RADIATION