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Observations and discoveries of supernova remnants with GMRT

Published online by Cambridge University Press:  29 January 2014

Subhashis Roy  and
Sabyasachi Pal
Subhashis Roy
Affiliation:
NCRA-TIFR, Pune University Campus, Pune-411007, India email: [email protected]
Sabyasachi Pal
Affiliation:
Indian Centre for Space Physics, Kolkata-700084, India Ionospheric and Earthquake Research Centre, Kolkata-7211154, India email: [email protected]
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Abstract

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We have measured HI absorption distance to the youngest Galactic supernova remnant G1.9+0.3. Absorption by known anomalous velocity features near the Galactic centre (GC) puts a lower limit on its distance from Sun as 10 kpc, 2 kpc further away from the GC. We have found a small diameter (1.6′) shell like structure G354.4+0.0, that shows polarised emission in the NVSS. Based on its morphology, angular size, HI distance and its spectrum between 1.4 GHz and 330 MHz, it is perhaps the second youngest SNR in the Galaxy that is expanding in a dense environment of an HII region surrounding it. Our pilot observation of the inner Galactic 4th quadrant within 337° < l < 354° with a fixed Galactic latitude of 0.37° has confirmed G345.1−0.2 as an SNR.

Keywords

supernova remnantsradio continuum: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 197 - 201
Copyright
Copyright © International Astronomical Union 2014 

References

Brogan, C. L., Gelfand, J. D., Gaensler, B. M., Kassim, N. E., & Lazio, T. J. W. 2006, ApJL, 639, L25Google Scholar
Cohen, R. J. 1975, MNRAS, 171, 659Google Scholar
Condon, J. J., Cotton, W. D., Greisen, E. W., et al. 1998, AJ, 115, 1693CrossRefGoogle Scholar
Green, D. A. 1991, PASP, 103, 209Google Scholar
Green, D. A. 2009, Bulletin of the Astronomical Society of India, 37, 45Google Scholar
Green, D. A. & Gull, S. F. 1984, Nature, 312, 527Google Scholar
Ksenofontov, L. T., Völk, H. J., & Berezhko, E. G. 2010, ApJ, 714, 1187Google Scholar
Li, W., Chornock, R., Leaman, J., et al. 2011, MNRAS, 412, 1473CrossRefGoogle Scholar
Reynolds, S. P., Borkowski, K. J., Green, D. A., et al. 2008, ApJL, 680, L41Google Scholar
Roy, S. & Bhatnagar, S. 2006, Journal of Physics Conference Series, 54, 152Google Scholar
Roy, S. & Pal, S. 2013, to be submitted to ApJLGoogle Scholar
Tammann, G. A., Loeffler, W., & Schroeder, A. 1994, ApJS, 92, 487CrossRefGoogle Scholar
Whiteoak, J. B. Z. & Green, A. J. 1996, AApS, 118, 329Google Scholar
Wright, A. E., Griffith, M. R., Hunt, A. J., et al. 1996, ApJS, 103, 145CrossRefGoogle Scholar