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We investigate the molecular environment of the Galactic supernova remnant (SNR) Kesteven 78 and perform an XMM-Newton X-ray spectroscopic study for the northeastern edge of the remnant. SNR Kes78 is found to interact with the molecular…

Astrophysics of Galaxies · Physics 2015-05-27 Ping Zhou , Yang Chen

Supernova remnant (SNR) Kes 69 is morphologically characterized by brightened radio, infrared, and X-ray emission on the southeastern rim, with the 1720 MHz OH masers detected in the northeastern and southeastern regions at various local…

Astrophysics · Physics 2011-02-11 Xin Zhou , Yang Chen , Yang Su , Ji Yang

We investigate the molecular environment of the supernova remnant (SNR) Kesteven 67 (G18.8+0.3) using observations in $^{12}$CO, $^{13}$CO, HCO$^+$,and HCN lines and possible associated $\gamma$-ray emission using 16-yr Fermi-LAT…

High Energy Astrophysical Phenomena · Physics 2025-01-13 Yun-Zhi Shen , Yang Chen , Xiao Zhang , Tian-Yu Tu , Wen-Juan Zhong , Qian-Qian Zhang , Qian-Cheng Liu

We carried out $^{12}$CO($J$ = 1-0) observations of the Galactic gamma-ray supernova remnant (SNR) Kesteven 79 using the Nobeyama Radio Observatory 45 m radio telescope, which has an angular resolution of $\sim20$ arcsec. We identified…

The physical nature of thermal composite supernova remnants (SNRs) remains controversial. We have revisited the archival XMM-Newton and Chandra data of the thermal composite SNR Kesteven 41 (Kes 41 or G337.8-0.1) and performed a millimeter…

High Energy Astrophysical Phenomena · Physics 2015-02-11 Gao-Yuan Zhang , Yang Chen , Yang Su , Xin Zhou , Thomas G. Pannuti , Ping Zhou

Kes 79 (G33.6+0.1) is an aspherical thermal composite supernova remnant (SNR) observed across the electromagnetic spectrum and showing an unusual highly-structured morphology, in addition to harboring a central compact object (CCO). Using…

High Energy Astrophysical Phenomena · Physics 2016-12-21 Ping Zhou , Yang Chen , Samar Safi-Harb , Xin Zhou , Ming Sun , Zhi-Yu Zhang , Gao-Yuan Zhang

Many supernova remnants (SNRs) are considered to evolve in molecular environments, but the associations between SNRs and molecular clouds (MCs) are often unclear. Being aware of such ambiguous case, we report our study on the molecular…

High Energy Astrophysical Phenomena · Physics 2020-07-15 Xin Zhou , Yang Su , Ji Yang , Yang Chen , Ye Xu , Xuepeng Chen , Shaobo Zhang

We performed millimeter observations in CO lines toward the supernova remnant (SNR) G127.1+0.5. We found a molecular filament at 4--13 km s$^{-1}$ consisting of two distinct parts: a straight part coming out of the remnant region and a…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Xin Zhou , Ji Yang , Min Fang , Yang Su

We have investigated the molecular environment of the semicircular composite supernova remnant (SNR) 3C396 and performed a Chandra spatially resolved thermal X-ray spectroscopic study of this young SNR. With our CO millimeter observations,…

Astrophysics of Galaxies · Physics 2015-05-20 Yang Su , Yang Chen , Ji Yang , Bon-Chul Koo , Xin Zhou , Deng-Rong Lu , Il-Gyo Jeong , Tracey DeLaney

3C 397 is a radio and X-ray bright Galactic supernova remnant (SNR) with an unusual rectangular morphology. Our CO observation obtained with the Purple Mountain Observatory at Delingha reveals that the remnant is well confined in a cavity…

Astrophysics of Galaxies · Physics 2015-05-14 Bing Jiang , Yang Chen , Junzhi Wang , Yang Su , Xin Zhou , Samar Safi-Harb , Tracey DeLaney

We present a spatially resolved spectroscopic analysis of the young Galactic supernova remnant Kes 75 (SNR G29.7-0.3) using the Chandra X-ray Observatory. Kes 75 is one of an increasing number of examples of a shell-type remnant with a…

Astrophysics · Physics 2009-11-07 David J. Helfand , Benjamin F. Collins , E. V. Gotthelf

We have carried out 12CO, 13CO, and C18O observations toward the mixed morphology supernova remnant (SNR) IC 443. The observations cover a 1.5*1.5 deg^2 area and allow us to investigate the overall molecular environment of the remnant. Some…

Solar and Stellar Astrophysics · Physics 2014-05-29 Yang Su , Min Fang , Ji Yang , Ping Zhou , Yang Chen

We report the detection of GeV gamma-ray emission likely associated with supernova remnant (SNR) G335.2+0.1 and the finding of a molecular cloud ($\sim20$--$30^\prime$ in angular size) that is very likely in physical contact with the SNR…

High Energy Astrophysical Phenomena · Physics 2025-09-12 Chen Huang , Xiao Zhang , Yang Chen , Qian-Qian Zhang , Wen-Juan Zhong , Xin Zhou

We report our independent GeV gamma-ray study of the young shell-type supernova remnant (SNR) Kes 73 which harbors a central magnetar, and CO-line millimeter observations toward the SNR. Using 7.6 years of Fermi-LAT observation data, we…

High Energy Astrophysical Phenomena · Physics 2017-12-12 Bing Liu , Yang Chen , Xiao Zhang , Qian-Cheng Liu , Ting-Lan He , Xin Zhou , Ping Zhou , Yang Su

We have carried out CO J=2-1 and CO J=3-2 observations toward Tycho's supernova remnant (SNR) using the KOSMA 3m-Telescope. From these observations we identified three molecular clouds (MCs) around the SNR. The small cloud in the southwest…

Solar and Stellar Astrophysics · Physics 2015-05-20 Jin-Long Xu , Jun-Jie Wang , Martin Miller

We have carried out 12CO (J=1-0 and 2-1), 13CO (J=1-0), and C18O (J=1-0) observations in the direction of the supernova remnant (SNR) G22.7-0.2. A filamentary molecular gas structure, which is likely part of a larger molecular complex with…

Solar and Stellar Astrophysics · Physics 2015-06-23 Yang Su , Ji Yang , Xin Zhou , Ping Zhou , Yang Chen

We universally search for evidence of kinematic and spatial correlation of supernova remnant (SNR) and molecular cloud (MC) associations for nearly all SNRs in the coverage of the MWISP CO survey, i.e. 149 SNRs, 170 SNR candidates, and 18…

HESS J1912+101 is a shell-like TeV source that has no clear counterpart in multiwavelength. Using CO and H i data, we reveal that VLSR~+60 km/s molecular clouds (MCs), together with shocked molecular gas and high-velocity neutral atomic…

Astrophysics of Galaxies · Physics 2017-08-23 Yang Su , Xin Zhou , Ji Yang , Yang Chen , Xuepeng Chen , Yan Gong , Shaobo Zhang

We present deep Chandra observations and Spitzer Space Telescope infrared (IR) spectroscopy of the shell in the composite supernova remnant (SNR) Kes 75 (G29.7-0.3). The remnant is composed of a central pulsar wind nebula and a bright…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Tea Temim , Patrick Slane , Richard G. Arendt , Eli Dwek

We present a new millimeter CO-line observation towards 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…

High Energy Astrophysical Phenomena · Physics 2018-06-13 Qian-Cheng Liu , Yang Chen , Bing-Qiu Chen , Ping Zhou , Xiao-Tao Wang , Yang Su
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