Evidence for shocked molecular gas in the Galactic supernova remnant CTB 109 (G109.1-1.0)

Sasaki M, Kothes R, Plucinsky PP, Gaetz TJ, Brunt C (2006)

Publication Status: Published

Publication Type: Journal article

Publication year: 2006

Journal

Astrophysical Journal American Astronomical Society

Publisher: UNIV CHICAGO PRESS

Book Volume: 642

Pages Range: L149-L152

Journal Issue: 2

Abstract

We report the detection of molecular clouds around the X-ray-bright interior feature in the Galactic supernova remnant (SNR) CTB 109 (G109.1-1.0). This feature, called the "lobe," has been previously suggested to be the result of an interaction of the SNR shock wave with a molecular cloud complex. We present new high-resolution X-ray data from the Chandra X-Ray Observatory and new high-resolution CO data from the Five College Radio Astronomy Observatory that show the region of interaction with the cloud complex in greater detail. The CO data reveal three clouds around the lobe in the velocity interval. The velocity -57 km s(-1) < v < -52 km s(-1) profiles of (CO)-C-12 in various parts of the east cloud are well fit with a Gaussian; however, at the position at which the CO cloud and the lobe overlap, the velocity profile has an additional component toward higher negative velocities. The molecular hydrogen density in this part of the cloud is relatively high (N-H2 approximate to 1.9 x 10(20) cm(-2)), whereas the foreground absorption in X-rays (NH approximate to 4.5 x 10(21) cm(-2)), obtained from Chandra data, is lower than in other parts of the cloud and in the north and south clouds. These results indicate that the east cloud has been hit by the SNR blast wave on the western side, forming the bright X- ray lobe.

Authors with CRIS profile

Manami Sasaki Professur für Multiwellenlängenastronomie

Involved external institutions

Harvard-Smithsonian Center for Astrophysics (CfA) US United States (USA) (US) University of Exeter GB United Kingdom (GB)

How to cite

APA:

Sasaki, M., Kothes, R., Plucinsky, P.P., Gaetz, T.J., & Brunt, C. (2006). Evidence for shocked molecular gas in the Galactic supernova remnant CTB 109 (G109.1-1.0). Astrophysical Journal, 642(2), L149-L152.

MLA:

Sasaki, Manami, et al. "Evidence for shocked molecular gas in the Galactic supernova remnant CTB 109 (G109.1-1.0)." Astrophysical Journal 642.2 (2006): L149-L152.

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