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Young Supernova remnants (SNRs) with smaller angular sizes are likely missing from existing radio SNR catalogues, caused by observational constraints and selection effects. In order to find new compact radio SNR candidates, we searched the…

星系天体物理 · 物理学 2021-09-16 S. Ranasinghe , D. Leahy , J Stil

We present deep H-alpha images of portions of the X-ray bright but optically faint Galactic supernova remnant G156.2+5.7, revealing numerous and delicately thin nonradiative filaments which mark the location of the remnant's forward shock.…

高能天体物理现象 · 物理学 2016-08-03 Satoru Katsuda , Masaomi Tanaka , Tomoki Morokuma , Robert Fesen , Dan Milisavljevic

We present the first results from an imaging and a spectroscopic survey of the optical emission associated with supernova remnant (SNR) G107.5$-$1.5. We discovered optical diffuse and filamentary emission from G107.5$-$1.5 using the 1.5-m…

高能天体物理现象 · 物理学 2023-03-01 Hicran Bakis , Gunay Bulut , Volkan Bakis , Hidetoshi Sano , Aytap Sezer

We investigate the nature of the accelerated particles responsible for the production of the gamma-ray emission observed from the middle-aged supernova remnant (SNR) HB 21. The analysis of more than nine years of Fermi LAT data leads to the…

高能天体物理现象 · 物理学 2019-02-19 L. Ambrogi , R. Zanin , S. Casanova , E. De Ona Wilhelmi , G. Peron , F. Aharonian

We present the results of VLA observations in the ground-state hydroxyl (OH) transition at 1720 MHz toward 20 supernova remnants (SNRs). We detect compact emission from four objects. For three of these objects (G32.8-0.1, G337.8-0.1, and…

天体物理学 · 物理学 2009-10-30 Barron Koralesky , D. A. Frail , W. M. Goss , M. J. Claussen , A. J. Green

We present Australia Telescope Compact Array observations of the supernova remnant (SNR) G309.2-00.6. In a 1.3-GHz continuum image the remnant appears as a near-circular shell, but with two brightened and distorted arcs of emission on…

天体物理学 · 物理学 2009-10-30 B. M. Gaensler , A. J. Green , R. N. Manchester

Supernova remnants (SNRs) are likely sources of hadronic particle acceleration within our galaxy, contributing to the galactic cosmic ray flux. Next-generation instruments, such as the Southern Wide-field Gamma-ray Observatory (SWGO), will…

高能天体物理现象 · 物理学 2025-06-24 Nick Scharrer , Samuel T. Spencer , Vikas Joshi , Alison M. W. Mitchell

Supernovae and their remnants provide energetic feedback to the ambient interstellar medium (ISM), which is often distributed in multiple gas phases. Among them, warm molecular hydrogen (H$_2$) often dominates the cooling of the shocked…

星系天体物理 · 物理学 2022-11-29 Yunwei Deng , Zhi-Yu Zhang , Ping Zhou , Junzhi Wang , Min Fang , Lingrui Lin , Fuyan Bian , Zhiwei Chen , Yong Shi , Guoyin Chen , Hui Li

We search for far-infrared (FIR) counterparts of known supernova remnants (SNRs) in the Galactic plane (10 deg <| l |< 60 deg) at 70-500 micron using the Herschel Infrared Galactic Plane Survey (Hi-GAL). Of 71 sources studied, we find that…

How Supernova Remnant (SNR) shocks impact nearby molecular clouds is still poorly observationally constrained. It is unclear if SNRs can positively or negatively affect clouds star formation potential. We have studied the dense gas…

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…

高能天体物理现象 · 物理学 2015-06-22 Xin Zhou , Ji Yang , Min Fang , Yang Su

Despite tantalizing evidence that supernova remnants (SNRs) are the source of Galactic cosmic rays (CRs), including the recent detection of a spectral signature of hadronic gamma-ray emission from two SNRs, their origin in aggregate remains…

高能天体物理现象 · 物理学 2019-08-13 T. J. Brandt , F. Acero , F. de Palma , J. W. Hewitt , M. Renaud

It has long been speculated that supernova remnants represent a major source of cosmic rays in the Galaxy. Observations over the past decade have ceremoniously unveiled direct evidence of particle acceleration in SNRs to energies…

天体物理学 · 物理学 2009-06-23 Patrick Slane

We analyze the GeV gamma-ray emission data from the vicinity of the supernova remnant (SNR) HB9 (G160.9+2.6) from the \textit{Fermi}-LAT 12-year observations to quantify the evolution of diffusive shock acceleration (DSA) in the SNR. In the…

高能天体物理现象 · 物理学 2022-05-25 Tomohiko Oka , Wataru Ishizaki

Anderson et al. (2017) identified seventy six candidate supernova remnants (SNRs) using data from The HI, OH, Recombination line survey of the Milky Way (THOR). The spectral index and polarization properties can help distinguish between…

We present a study of the interstellar medium associated with the two middle-aged supernova remnants (SNRs) W41 and G22.7-0.2, both detected in TeV gamma-rays. Using high-angular-resolution $^{12}$CO($J$ = 1-0) data from the Nobeyama 45-m…

We present the results of GBT observations of all four ground-state hydroxyl (OH) transitions toward 15 supernova remnants (SNRs) which show OH(1720 MHz) maser emission. This species of maser is well established as an excellent tracer of an…

天体物理学 · 物理学 2009-11-13 J. W. Hewitt , F. Yusef-Zadeh , M. Wardle

Recent high-resolution infrared space missions have revealed supernova remnants (SNRs) of diverse morphology in infrared (IR) dust emission that is often very different from their X-ray appearance. The observed range of infrared-to-X-ray…

星系天体物理 · 物理学 2016-04-20 Bon-Chul Koo , Jae-Joon Lee , Il-Gyo Jeong , Ji Yeon Seok , Hyun-Jeong Kim

During a detailed search for optical counterparts of known Galactic supernova remnants (SNRs) using the Anglo Australian Observatory/United Kingdom Schmidt Telescope (AAO/UKST) HAlpha survey of the southern Galactic plane we have found…

星系天体物理 · 物理学 2015-05-30 M. Stupar , Q. A. Parker

The Parkes-MIT-NRAO (PMN) radio survey has been used to generate a quasi all-sky study of Galactic Supernova Remnants (SNRs) at a common frequency of 4.85 GHz. We present flux densities estimated for the sample of 110 Southern Galactic SNRs…

天体物理学 · 物理学 2009-11-13 M. Stupar , M. D. Filipovic , Q. A. Parker , G. L. White , T. G. Pannuti , P. A. Jones
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