Different type of maser star

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159716· OSTI ID:5235064

Dickinson, D F; Dinger, A S.C.

A systematic survey of short-period, semiregular variable stars has been made resulting in the detection of six new water masers. Of the 14 short-period maser stars now known, nine are classified as SRb variables. All are very late spectral type SRb's typically M7, while the overwhelming majority of normal SRb stars is M4 to M6. Their (2.2 ..mu..)--(11 ..mu..) colar indices are among the lowest of any known maser stars. They are presumably less dusty as well. Four of the SRb stars and two of the remainder do not obey the correlation between period and velocity spread of the emission features that is found for the Mira and long-period, semiregular variables. Finally, high galactic latitudes dominate; 13 of the 14 are in excess of 13/sup 0/, and nine of these are greater than 25/sup 0/. These facts suggest that the short-period semiregular variables: particularly the SRb stars: may be a very different type of maser star than the Mira and long-period semiregular variables.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology
• OSTI ID: 5235064
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 254:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EMISSION
EQUIPMENT
HYDROGEN COMPOUNDS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OXYGEN COMPOUNDS
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
STARS
VARIABLE STARS
WATER