1998A&AS..128...35S -
Astron. Astrophys., Suppl. Ser., 128, 35-65 (1998/February-2)
A new sample of OH/IR stars in the Galactic Center.
SJOUWERMAN L.O., VAN LANGEVELDE H.J., WINNBERG A. and HABING H.J.
Abstract (from CDS):
Two independent, largely overlapping 1612 MHz data sets were searched for OH/IR stars in the Galactic center. One set, taken with the Very Large Array in the period 1988 to 1991, consists of 17 epochs monitoring data of Van Langevelde et al. (
1993A&AS..101..109V). The other set was observed in 1994, using the Australia Telescope Compact Array. This article describes the data reduction procedures as well as a different way of searching image cubes for narrow line sources, and lists a total of 155 double peak OH maser detections within 18' or 40 projected parsecs of Sagittarius A*, the compact radio continuum source in the Galactic nucleus. Presented are 65 formerly unseen double peaked 1612MHz emitters, of which 52 are OH/IR stars. Also given are 3 single peak sources, which we believe to be masers of OH/IR stars. Apart from being less bright in their 1612MHz OH maser line, the previously unknown OH/IR stars do not seem to be different from the previously known population of OH/IR stars in the Galactic center. We find that the OH/IR star OH maser luminosity distribution peaks at L
OH≃10
43.4 photons per second. Further physical and kinematical analysis of the new sample will be presented in additional papers.
Abstract Copyright:
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Journal keyword(s):
masers - catalogs - surveys - stars: AGB and post-AGB - Galaxy: center - radio lines: stars
VizieR on-line data:
<Available at CDS (J/A+AS/128/35): table2 table3>
Nomenclature:
Table 2: [SVW98] OH LLL.lll+B.bbb N=158
Simbad objects:
164
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