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.
Keywords
Cite
@article{arxiv.astro-ph/0502176,
title = {SiO Maser Sources toward Globular Clusters},
author = {Noriyuki Matsunaga and Shuji Deguchi and Yoshifusa Ita and Toshihiko Tanabe and Yoshikazu Nakada},
journal= {arXiv preprint arXiv:astro-ph/0502176},
year = {2015}
}
Comments
6 pages 1 figure PASJ, 57 No. 1 (in press)