A radiocontinuum study of the supernova remnant MSH 11-61A

• Main Authors: Filipović M.D., Payne J.L., Jones P.A.
• Format: Article
• Language: English
• Published: Astronomical Observatory, Department of Astronomy, Belgrade 2005-01-01
• Series: Serbian Astronomical Journal
• Subjects: ISM: individual objects: (MSH 1161A; G290.10.8); ISM: supernova remnants; radio continuum: ISM
• Online Access: http://www.doiserbia.nb.rs/img/doi/1450-698X/2005/1450-698X0570047F.pdf
• ISSN: 1450-698X; 1820-9289

We present a high-resolution radio-continuum study of Galactic supernova remnant MSH11-61A. We combine moderate resolution X-ray, radio-continuum and CO data to study the morphology and kinematics of MSH 11-61A. We estimate the radio-continuum spectral index to be α843−4850=- 0.33±0.07 based on our flux density measurements and also note that this SNR has significant 'turn­over' spectra at lower (29.9843 MHz) frequencies. The diameter of MSH1161A is estimated to be 12.5' with 'ear' extensions of 41 to the northwest and southeast. The striking anticorrelation between X-ray and radio-continuum images confirms a mixed-morphology classification of this remnant. The CO images are consistent with a distance reported by Rosado et al.(1996) of about 7 kpc. .