An Investigation of the Interstellar Environment of Supernova Remnant CTB87
Liu,Qian-Cheng1; Chen,Yang1,2; Chen,Bing-Qiu3; Zhou,Ping1,4; Wang,Xiao-Tao1,5; Su,Yang6,7
Source PublicationThe Astrophysical Journal
AbstractAbstract We present a new millimeter CO-line observation toward supernova remnant (SNR) CTB 87, which was regarded purely as a pulsar wind nebula (PWN), and an optical investigation of a coincident surrounding superbubble. The CO observation shows that the SNR delineated by the radio emission is projectively covered by a molecular cloud (MC) complex at to . Both the symmetric axis of the radio emission and the trailing X-ray PWN appear projectively to be along a gap between two molecular gas patches at ?58 to . Asymmetric broad profiles of 12CO lines peaked at are found at the eastern and southwestern edges of the radio emission. This represents a kinematic signature consistent with an SNR–MC interaction. We also find that a superbubble, ~37′ in radius, appears to surround the SNR from H i 21 cm ( to ), WISE mid-IR, and optical extinction data. We build a multi-band photometric stellar sample of stars within the superbubble region and find 82 OB star candidates. The likely peak distance in the stars’ distribution seems consistent with the distance previously suggested for CTB 87. We suggest the arc-like radio emission is mainly a relic of the part of the blast wave that propagates into the MC complex and is now in a radiative stage while the other part of the blast wave has been expanding into the low-density region in the superbubble. This scenario naturally explains the lack of X-ray emission related to the ejecta and blast wave. The SNR–MC interaction also favors a hadronic contribution to the γ-ray emission from the CTB 87 region.
KeywordISM: bubbles ISM: individual objects (CTB 87 = G74.9+1.2) ISM: molecules ISM: supernova remnants
WOS IDIOP:0004-637X-859-2-aabfe1
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Department of Astronomy, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, People’s Republic of China;
2.Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing 210093, People’s Republic of China
3.South-Western Institute for Astronomy Research, Yunnan University, Kunming, Yunnan 650091, People’s Republic of China
4.Anton Pannekoek Institute, University of Amsterdam, P.O. Box 94249, 1090 GE Amsterdam, The Netherlands
5.Department of Physics and Astronomy, University of Alabama, 308 Gallalee Hall, Tuscaloosa, AL 35487, USA
6.Purple Mountain Observatory, CAS, 2 West Beijing Road, Nanjing 210008, People’s Republic of China
7.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China
Recommended Citation
GB/T 7714
Liu,Qian-Cheng,Chen,Yang,Chen,Bing-Qiu,et al. An Investigation of the Interstellar Environment of Supernova Remnant CTB87[J]. The Astrophysical Journal,2018,859(2).
APA Liu,Qian-Cheng,Chen,Yang,Chen,Bing-Qiu,Zhou,Ping,Wang,Xiao-Tao,&Su,Yang.(2018).An Investigation of the Interstellar Environment of Supernova Remnant CTB87.The Astrophysical Journal,859(2).
MLA Liu,Qian-Cheng,et al."An Investigation of the Interstellar Environment of Supernova Remnant CTB87".The Astrophysical Journal 859.2(2018).
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