A Large Expanding Molecular Arc in the Sagittarius B1 Complex

Details A Large Expanding Molecular Arc in the Sagittarius B1 Complex A Large Expanding Molecular Arc in the Sagittarius B1 Complex

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasj...61..461t&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.61, No.3, pp.461--469

Astronomy and Astrophysics

Astronomy

3

Galaxy: Center, Ism: Bubbles, Ism: Clouds

Scientific paper

Results of molecular line observations toward the Sagittarius B1 complex are reported. Maps of the HCN, HCO+ and SiO J = 1-0 emissions were taken with the NRO 45-m telescope. With these data, combined with the ASTE CO J = 3-2 survey data, we have investigated the spatial structure, kinematics and physical conditions of two peculiar molecular features: CO0.55+0.07 and SiO0.56-0.01. The CO arc, CO0.55+0.07, shows clear expanding motion with sizes of 8.5 × 6.8pc² and an expansion velocity of 40km s-1. The SiO shell, SiO0.56-0.01, has a size of 3.0 × 3.4pc² and surrounds an X-ray Fe line source, G0.570-0.018. The mass and the kinetic energy of CO0.55+0.07 are estimated to be 105.5Modot and 1051.5erg, respectively. The kinetic energy of SiO0.56i-0.01 is ˜1050.4erg. An LVG analysis shows that the typical density and kinetic temperature are 103.8cm-3 and 28K, respectively. High-density clumps with a density of 104.0-4.5cm-3 associated with CO0.55+0.07 and SiO0.56-0.01 have been found, supporting the idea that they consist of swept-up material. The huge kinetic energy of CO0.55+0.07 is considered to be injected by a series of supernova explosions that took place within ˜2 × 105yr, which would suggest that it is a `bubble' created by a massive stellar cluster, whose mass is estimated to be 103.5-4.5Modot. The origin of SiO0.56-0.01 is rather unclear, but we suggest that it could be related to the X-ray source G0.570-0.018.

Affiliated with

Also associated with

No associations

Rating

A Large Expanding Molecular Arc in the Sagittarius B1 Complex 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 A Large Expanding Molecular Arc in the Sagittarius B1 Complex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Large Expanding Molecular Arc in the Sagittarius B1 Complex will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1644131