An SiO Maser Search off the Galactic Plane
Abstract
We have searched for the SiO J=1--0 v= 1 and 2 maser lines at ~ 43 GHz in 277 2MASS/MSX/IRAS sources off the Galactic plane (|b|> 3 deg), which resulted in 119 (112 new) detections. Among the new detections, are two very faint objects with MSX 12 micron flux densities below 2 Jy. These are likely to be O-rich AGB-stars associated with dwarf-galaxy tidal tails. The sample also includes medium bright MSX objects at moderately high Galactic latitudes (3 deg<|b|<5 deg) and in the IRAS gap at higher latitudes. A signature of a warp of the inner Galactic disk is found for a disk subsample. This warp appears relatively strongly in the area of 0<l<45 deg and 3<|b|<5 deg. We also found a group of stars that does not follow to the Galactic rotation. This feature appears in the Galactic disk at l~ 27 deg, and extends more than 15 deg in Galactic latitude, like a stream of tidal debris from a dwarf galaxy.
Keywords
Cite
@article{arxiv.0704.1713,
title = {An SiO Maser Search off the Galactic Plane},
author = {S. Deguchi and T. Fujii and Y. Ita and H. Imai and H. Izumiura and O. Kameya and N. Matsunaga and A. Miyazaki and A. Mizutani and Y. Nakada and J. Nakashima and A. Winnberg},
journal= {arXiv preprint arXiv:0704.1713},
year = {2015}
}
Comments
PASJ No.3 (June 25, 2007 issue in press)