Other
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.304..415s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 2, pp. 415-420.
Other
8
Masers, Circumstellar Matter, Stars: Mass-Loss, Stars: Variables: Other, Radio Lines: Stars
Scientific paper
A sample of 17 Miras and nine semiregular variable stars was simultaneously observed in the OH and H_2O maser lines with sensitivities of 0.15 and 0.6 Jy, respectively. One new H_2O source was detected. Among Miras the H_2O maser luminosity is well correlated with the OH maser luminosity. The ratio of H_2O to OH maser luminosities decreases by about four orders of magnitude from the semiregulars to the Miras as a result of an increase in the mass-loss rate. Some semiregulars have maser properties typical of Mira stars. H_2O emission is most likely to be detected from Miras at velocities close to the stellar velocity, while emission at blueshifted velocities dominates the detections from semiregulars. OH emission from the semiregulars usually occurs at greater redshifts and blueshifts with respect to the stellar velocities than OH emission observed from the Miras. The differences in the average composite maser profiles in both groups of stars can be related to the velocity gradients in the maser regions. It is suggested that some semiregular variables with maser emission may be in a later stage of stellar evolution than the Miras.
Le Squeren Anne-Marie
Szymczak Marian
No associations
LandOfFree
A comparison of OH and H_2O maser properties of Mira and semiregular variable stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A comparison of OH and H_2O maser properties of Mira and semiregular variable stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A comparison of OH and H_2O maser properties of Mira and semiregular variable stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-891617