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Shock waves from supernova remnants (SNRs) have strong influence on the physical and chemical properties of molecular clouds (MCs). Shocks propagating into magnetized MCs can be classified into "jump" J-shock and "continuous" C-shock. The…

Astrophysics of Galaxies · Physics 2025-01-22 Tian-Yu Tu , Valentine Wakelam , Yang Chen , Ping Zhou , Qian-Qian Zhang

We report observations with the MIPS instrument aboard the {\it Spitzer Space Telescope} (SST) of four supernova remnants (SNRs) believed to be the result of core-collapse SNe: N132D (0525-69.6), N49B (0525-66.0), N23 (0506-68.0), and…

The giant molecular clouds (MCs) found in the Milky Way and similar galaxies play a crucial role in the evolution of these systems. The supernova explosions that mark the death of massive stars in these regions often lead to interactions…

High Energy Astrophysical Phenomena · Physics 2015-06-22 P. Slane , A. Bykov , D. C. Ellison , G. Dubner , D. Castro

In recent works, through observations of molecular lines, we found that the supernova remnant (SNR) G18.8+0.3 is interacting with a molecular cloud towards its southern edge. Also it has been proven the presence of several neighboring HII…

Solar and Stellar Astrophysics · Physics 2016-06-02 M. Celis Peña , Sergio Paron

We mapped 12CO J=1-0, 12CO J=2-1, 13CO J=1-0, and 13CO J=2-1 lines toward supernova remnant (SNR) Cassiopeia A with the IRAM 30m telescope. The molecular clouds (MCs) along the line of sight of Cas A do not show optically thin,…

High Energy Astrophysical Phenomena · Physics 2018-09-26 Ping Zhou , Jiang-Tao Li , Zhi-Yu Zhang , Jacco Vink , Yang Chen , Maria Arias , Daniel Patnaude , Joel N. Bregman

We study cosmic-ray acceleration in a supernova remnant (SNR) and the escape from it. We model nonthermal particle and photon spectra for the hidden SNR in the open cluster Westerlund 2, and the old-age mixed-morphology SNR W 28. We assume…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Yutaka Fujita , Yutaka Ohira , Shuta J. Tanaka , Fumio Takahara

With Spitzer IRS we have obtained sensitive low-resolution spectroscopy from 5 to 35 microns for six supernova remnants (SNRs) that show evidence of shocked molecular gas: Kes 69, 3C 396, Kes 17, G346.6-0.2, G348.5-0.0 and G349.7+0.2.…

Solar and Stellar Astrophysics · Physics 2011-02-11 John W. Hewitt , Jeonghee Rho , Morten Andersen , William T. Reach

We have performed the submillimeter and millimeter observations in CO lines toward supernova remnant (SNR) IC443. CO molecular shell is well coincident with the partial shell of the SNR detected in radio continuum observations. The broad…

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

Galactic supernova remnants (SNRs) play an important role in our understanding of supernovae and their feedback on the interstellar environment. SNR G352.7$-$0.1 is special for its thermal composite morphology and double-ring structure. We…

High Energy Astrophysical Phenomena · Physics 2023-07-24 Qian-Qian Zhang , Ping Zhou , Yang Chen , Xiao Zhang , Wen-Juan Zhong , Xin Zhou , Zhi-Yu Zhang , Jacco Vink

A field of ~38'x38' around the supernova remnant (SNR) G349.7+0.2 has been surveyed in the CO J=1-0 transition with the 12 Meter Telescope of the NRAO, using the On-The-Fly technique. The resolution of the observations is 54". We have found…

Astrophysics · Physics 2009-10-31 Estela M. Reynoso , Jeffrey G. Mangum

N49 (LHA 120-N49) is a bright X-ray supernova remnant (SNR) in the Large Magellanic Cloud. We present new $^{12}$CO($J$ = 1-0, 3-2), HI, and 1.4 GHz radio-continuum observations of the SNR N49 using Mopra, ASTE, ALMA, and ATCA. We have…

RX J0046.5$-$7308 is a shell-type supernova remnant (SNR) in the Small Magellanic Cloud (SMC). We carried out new $^{12}$CO($J$ = 1-0, 3-2) observations toward the SNR using Mopra and the Atacama Submillimeter Telescope Experiment. We found…

Whether the progenitors of SNe Ia are single-degenerate or double-degenerate white dwarf (WD) systems is a highly debated topic. To address the origin of the Type Ia Tycho's supernova remnant (SNR), SN 1572, we have carried out a $^{12}$CO…

Astrophysics of Galaxies · Physics 2016-08-04 Ping Zhou , Yang Chen , Zhi-Yu Zhang , Xiang-Dong Li , Samar Safi-Harb , Xin Zhou , Xiao Zhang

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

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

The environment of supernova remnants (SNRs) is a key factor in their evolution, particularly at later stages of their existence. It is often assumed that mixed-morphology (MM) SNRs evolve in very dense environments, and that their…

High Energy Astrophysical Phenomena · Physics 2019-07-03 Maria Arias , Vladimir Domcek , Ping Zhou , Jacco Vink

New HI images from the VLA Galactic Plane Survey (VGPS) show clear absorption features associated with the supernova remnant (SNR) G18.8+0.3. High-resolution $^{13}$CO images reveal that molecular clouds overlap the radio filaments of…

Astrophysics · Physics 2009-11-13 W. W. Tian , D. A. Leahy , Q. D. Wang

Using the IRAM 30-m telescope, we observed the supernova remnant 3C 391 (G31.9+0.0) and its surroundings in the CO(2-1), HCO+(1-0), CS(2-1), CS(3-2), and CS(5-4) lines. The ambient molecular gas at the distance (9 kpc) of the remnant…

Astrophysics · Physics 2009-10-30 William T. Reach , Jeonghee Rho

High resolution millimeter-wave and near-infrared observations of the supernova remnants W28 and W44 reveal extensive shocked molecular gas where supernova blast waves are propagating into giant molecular clouds. New CO observations were…

Astrophysics · Physics 2014-10-13 William T. reach , Jeonghee Rho , T. H. Jarrett

About 30 Galactic supernova remnants (SNRs) are thought to be physically associated with molecular clouds (MCs). These systems are prime \g-ray source candidates as the accelerated particles from shock fronts collide with the surrounding…

Astrophysics of Galaxies · Physics 2019-08-14 D. Fernandez , M. Dalton , P. Eger , H. Laffon , J. Mehault , S. Ohm , I. Oya , M. Renaud