SiO Maser Forest at the Galactic Center

Details SiO Maser Forest at the Galactic Center SiO Maser Forest at the Galactic Center

1997-12-07

arxiv.org/abs/astro-ph/9712101v1

Astronomy and Astrophysics

Astrophysics

15 pages, 1 figure, Astrophysical Journal (Letters) in press

Scientific paper

10.1086/311150

A moderately deep survey of stellar maser sources toward the Galactic center has been made in the SiO J=1-0 v=1 and v=2 transitions (~ 43 GHz) with the Nobeyama 45-m telescope of a beam size of about 40". At the Galactic center (Sgr A*), 7 (4 new) SiO maser sources were detected in one beam. In order to investigate the spatial distribution of SiO maser sources, we have also observed the offset positions by +- 40" in Galactic longitude from the Galactic center. In total, 7 (4 new) SiO maser sources were detected at the offset positions. Taking into account the shorter integration time at the offset positions, we find that the surface number density of SiO maser sources is nearly constant at the Galactic center. The number density of SiO maser sources is found to be an order of magnitude higher than the density of OH 1612 MHz objects. A radial-velocity gradient in Galactic longitude was not detected. These facts indicate that the SiO maser sources seen toward the Galactic center are mostly associated with the stellar population of a Galactic stellar nuclear disk of more than a few arc minute radius.

Affiliated with

Also associated with

No associations

Rating

SiO Maser Forest at the Galactic Center 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 SiO Maser Forest at the Galactic Center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SiO Maser Forest at the Galactic Center will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-223989