The distance to the SNR CTB109 deduced from its environment

Details The distance to the SNR CTB109 deduced from its environment The distance to the SNR CTB109 deduced from its environment

2002-05-02

arxiv.org/abs/astro-ph/0205034v1

Astrophys.J. 576 (2002) 169-175

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures. accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/341545

We conducted a study of the environment around the supernova remnant CTB109. We found that the SNR is part of a large complex of HII regions extending over an area of 400 pc along the Galactic plane at a distance of about 3 kpc at the closer edge of the Perseus spiral arm. At this distance CTB109 has a diameter of about 24 pc. We demonstrated that including spiral shocks in the distance estimation is an ultimate requirement to determine reliable distances to objects located in the Perseus arm. The most likely explanation for the high concentration of HII regions and SNRs is that the star formation in this part of the Perseus arm is triggered by the spiral shock.

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