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Measuring distances to Galactic SNRs using the red clump stars

Published online by Cambridge University Press:  17 October 2017

S. S. Shan ,
D. Wu ,
H. Zhu ,
M. F. Zhang  and
W. W. Tian
S. S. Shan
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Datun Road, Chaoyang District, Beijing 100012, China email: tww@nao.cas.cn School of Astronomy, University of Chinese Academy of Sciences, Beijing 100049, China
D. Wu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Datun Road, Chaoyang District, Beijing 100012, China email: tww@nao.cas.cn College of Information Science and Technology, Beijing Normal University, Beijing 100875, China
H. Zhu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Datun Road, Chaoyang District, Beijing 100012, China email: tww@nao.cas.cn
M. F. Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Datun Road, Chaoyang District, Beijing 100012, China email: tww@nao.cas.cn School of Astronomy, University of Chinese Academy of Sciences, Beijing 100049, China
W. W. Tian
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences Datun Road, Chaoyang District, Beijing 100012, China email: tww@nao.cas.cn School of Astronomy, University of Chinese Academy of Sciences, Beijing 100049, China
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Abstract

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Reliable distances to Galactic Supernova remnants (SNRs) are essential to constrain parameters that reveal the evolutional process of SNRs. We carry out a project to measure SNRs’ distances in the first quadrant of the Galaxy. In this project, red clump stars (RCS) are used as standard candle to build the optical extinction (AV)-(D) distance relation in each direction of extinction-known SNRs. Here, G5.7-0.01, G54.1+0.3 and G78.2+2.1 are taken as typical examples. We obtain the distance of 3−0.3+0.4 kpc for G5.7-0.01, the lower limit of 5.8 kpc for G54.1+0.3, the upper limit of 2 kpc for G5.7-0.01. The results are consistent with distances from kinematic measurements. Hence, we highlight the RCS method can independently trace the distance to the SNRs.

Keywords

ISM: supernova remnantsmethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S331: Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths , February 2017 , pp. 216 - 219
Copyright
Copyright © International Astronomical Union 2017 

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