SiO Maser Sources toward Globular Clusters

Abstract

We report on the detection of SiO masers in Asymptotic Giant Branch variables toward bulge/disk globular clusters. In five out of six cases, the radial velocities are compatible with the optically measured radial velocities of globular clusters in the assessed uncertainty. Two sources, toward Terzan~5 and Terzan~12, lie very close to the cluster centers. The objects toward Pal~6 and Terzan~12 have luminosities appropriate to the AGB tip in globular clusters, while those toward NGC 6171, Pal~10, and Terzan~5 are brighter than expected. It is suggested that the latter three may have evolved from merged binaries, offering a test for binary-evolution scenarios in globular clusters, if the membership is approved.

6 pages 1 figure PASJ, 57 No. 1 (in press)

References in corpus (4)

• Dynamical Formation of Close Binary Systems in Globular Clusters
• Relative Frequencies of Blue Stragglers in Galactic Globular Clusters: Constraints for the Formation Mechanisms
• High resolution infrared spectra of bulge globular clusters: The extreme chemical abundances of Terzan 4 and Terzan 5
• Infrared Echelle Spectroscopy of Palomar6 and M71

Cited by in corpus (7)

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• Accurate OH maser positions II. the Galactic Center region
• An AKARI Search for Intracluster Dust of Globular Clusters
• SiO Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream
• Molecules and Chemistry in Red Supergiants