Detection of J = 5-4 SiO masers in late-type stars

Journal Article · Tue Mar 15 04:00:00 EST 1983 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183990· OSTI ID:5910224

Clemens, D P; Lane, A P

We have detected v = 1, J = 5-4 SiO maser emission from R Leo, chi Cyg, and VX Sgr and v = 2, J = 4-5 maser emission from VX Sgr. Upper limits are reported for maser emission in the J = 6-5, v = 1 and v = 2, and J = 2-1, v = 3 transitions toward several late-type stars. Maser photon emission rates for the high J transitions which have been detected are roughly comparable to emission rates for the lower J transitions. Various maser pump mechanisms and emission regions are discussed, and published numerical models are compared with the observations. No single model emerges as the best explanation of SiO maser phenomena.

• Research Organization: Department of Physics and Astronomy, University of Massachusetts, Amherst, MA
• OSTI ID: 5910224
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 266:2; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CHALCOGENIDES
ELECTRONIC EQUIPMENT
EMISSION
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
GIANT STARS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STARS
SUPERGIANT STARS
VARIABLE STARS