Detection of rotationally excited OH emission toward the probable young planetary nebular Vy 2-2

Journal Article · Thu Aug 01 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163364· OSTI ID:5307735

Jewell, P R; Schenewerk, M S; Snyder, L E

A search for 4.7 and 6.0 GHz rotationally excited OH emission in OH/Miras, OH/IR stars, Herbig-Haro objects, Herbig Ae and Be stars, and compact planetary nebulae has been performed. Many of the objects were surveyed in all seven of the lambda doublet hyperfine transitions in the /sup 2/product/sub 3/2/, J = 5/2 and /sup 2/product/sub 1//sub ///sub 2/, J = 1/2 rotational states. In general, this is the most comprehensive and sensitive search for circumstellar rotationally excited OH yet performed. Only one new detection was made, but that was of 6035 MHz emission from the interesting object Vy 2-2. This object is a probable compact planetary nebula surrounded by a fossil molecular envelope from the progenitor red giant. The object was previously known to have a 1612 MHz ground-state OH maser. A complete summary of all observations is given. We discuss the excitation conditions and a number of pumping schemes that could explain the Vy 2-2 masers and the negative results for excited-state OH masers in the other sources. The morphology of the Vy 2-2 envelope as indicated by the velocity structure of the 6035 MHz emissions is also discussed.

• Research Organization: Department of Astronomy, University of Illinois, Urbana
• OSTI ID: 5307735
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 295:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
DATA
ELECTRONIC EQUIPMENT
ENERGY LEVELS
EQUIPMENT
EXCITED STATES
EXPERIMENTAL DATA
GIANT STARS
HYDROXYL RADICALS
HYPERFINE STRUCTURE
INFORMATION
INTERSTELLAR SPACE
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MOLECULES
MORPHOLOGY
NEBULAE
NUMERICAL DATA
OPTICAL PUMPING
PLANETARY NEBULAE
PUMPING
RADICALS
RED GIANT STARS
ROTATIONAL STATES
SPACE
STARS
TABLES
VELOCITY