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We present a new selected sample of 69 Galactic supernova remnants (SNRs) for calibration of radio $\Sigma-D$ relation at 1 GHz. Calibrators with the most reliable distances were selected through an extensive literature search. The…

高能天体物理现象 · 物理学 2025-10-07 D. Urošević , B. Vukotić , M. Anđelić , N. Mladenović

Deep optical CCD images of the supernova remnant G 15.1-1.6 were obtained and filamentary and diffuse emission has been discovered. The images, taken in the emission lines of Halpha+[N II], [S II] and [O III], reveal filamentary and diffuse…

天体物理学 · 物理学 2009-11-13 P. Boumis , J. Alikakos , P. E. Christopoulou , F. Mavromatakis , E. M. Xilouris , C. D. Goudis

We present the first catalog of supernova remnants (SNRs) in M31 which exhibit diffuse ultraviolet (UV) emission. UV images of M31 were obtained by the Ultraviolet Imaging Telescope (UVIT) on the AstroSat satellite, and the list of SNRs was…

星系天体物理 · 物理学 2023-03-01 Denis Leahy , Christopher Monaghan , Sujith Ranasinghe

Mixed-morphology supernova remnants (MM SNRs) are a mysterious class of objects that display thermal X-ray emission within their radio shell. They are an older class of SNRs, and as such are profoundly affected by the environment into which…

高能天体物理现象 · 物理学 2019-02-27 M. Arias , J. Vink , M. Iacobelli , V. Domcek , M. Haverkorn , J. B. R. Oonk , I. Polderman , W. Reich , G. J. White , P. Zhou

Observations of large supernova remnants (SNRs) at high frequencies are rare, but provide valuable information about their physical properties. The total intensity and polarization properties of 16 large SNRs in the Galactic plane were…

星系天体物理 · 物理学 2015-05-27 X. Y. Gao , J. L. Han , W. Reich , P. Reich , X. H. Sun , L. Xiao

In the frame of the Astronomical Validation activities for the 64m Sardinia Radio Telescope, we performed 5-22 GHz imaging observations of the complex-morphology supernova remnants (SNRs) W44 and IC443. We adopted innovative observing and…

高能天体物理现象 · 物理学 2016-09-14 E. Egron , A. Pellizzoni , S. Loru , M. N. Iacolina , M. Marongiu , S. Righini , S. Mulas , G. Murtas , M. Bachetti , R. Concu , A. Melis , A. Trois , R. Ricci , M. Pilia

We have identified a new supernova remnant (SNR), G51.04+0.07 (G51.04), using observations at 74 MHz from the VLA Low-Frequency Sky Survey Redux. Earlier, higher frequency radio continuum, recombination line, and infrared data had correctly…

高能天体物理现象 · 物理学 2018-06-21 L. Supán , G. Castelletti , W. M. Peters , N. E. Kassim

We have investigated three SNRs in the LMC using multi-wavelength data. These SNRs are generally fainter than the known sample and may represent a previously missed population. One of our SNRs is the second LMC remnant analyzed which is…

宇宙学与河外天体物理 · 物理学 2011-02-01 Matthew D. Klimek , S. D. Points , R. C. Smith , R. L. Shelton , R. Williams

We present 1 to 10GHz radio continuum flux density, spectral index, polarisation and Rotation Measure (RM) images of the youngest known Galactic Supernova Remnant (SNR) G1.9+0.3, using observations from the Australia Telescope Compact Array…

We have detected a spatially resolved supernova remnant (SNR) in the center of the Andromeda Galaxy, in radio, X-ray, and optical wavelengths. These observations provide the highest spatial resolution imaging of a radio/X-ray/optical SNR in…

天体物理学 · 物理学 2009-11-07 A. K. H. Kong , L. O. Sjouwerman , B. F. Williams , M. R. Garcia , J. R. Dickel

Galactic interstellar emission contributes substantially to Fermi LAT observations in the Galactic plane, where the majority of Supernova Remnants (SNRs) are located. We have developed a method to explore some systematic effects on SNRs'…

高能天体物理现象 · 物理学 2019-08-13 F. de Palma , T. J. Brandt , G. Johannesson , L. Tibaldo

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 radio, optical and X-ray detected counterparts to the sub-mm sources found using SCUBA in the Hubble Deep Field North region (GOODS-N). A new counterpart identification statistic is developed to identify properties of galaxies…

天体物理学 · 物理学 2009-11-10 C. Borys , D. Scott , S. C. Chapman , M. Halpern , A. Pope , K. Nandra

Deep optical CCD images of the supernova remnant G 32.8-0.1 were obtained where filamentary and diffuse emission was discovered. The images were acquired in the emission lines of Halpha+[N II] and [S II]. Filamentary and diffuse structures…

The Sino-German 6cm polarization survey has mapped in total intensity and polarization intensity over an area of approximately 2200 square degrees in the Galactic disk. This survey provides an opportunity to search for Galactic supernova…

星系天体物理 · 物理学 2015-06-15 X. Y. Gao , X. H. Sun , J. L. Han , W. Reich , P. Reich , R. Wielebinski

Hadronic gamma-ray emission from supernova remnants (SNRs) is an important tool to test shock acceleration of cosmic ray protons. Tycho is one of nearly a dozen Galactic SNRs which are suggested to emit hadronic gamma-ray emission. Among…

高能天体物理现象 · 物理学 2015-06-11 Xiao Zhang , Yang Chen , Hui Li , Xin Zhou

Radio properties of supernova outbursts remain poorly understood despite longstanding campaigns following events discovered at other wavelengths. After ~ 30 years of observations, only ~ 50 supernovae have been detected at radio…

宇宙学与河外天体物理 · 物理学 2015-05-28 Amy Lien , Nachiketa Chakraborty , Brian D. Fields , Athol Kemball

We present the second in a series of results in which we have searched for undiscovered neutron stars in supernova remnants (SNRs). This paper deals with the largest six SNRs in our sample, too large for Chandra or XMM-Newton to cover in a…

天体物理学 · 物理学 2009-11-11 D. L. Kaplan , B. M. Gaensler , S. R. Kulkarni , P. O. Slane

We present a survey of optically emitting supernova remnants (SNRs) in M31 based on H$\alpha$ and [SII] images in the Local Group Survey. Using these images, we select objects that have [SII]:H$\alpha$ $>$ 0.4 and circular shapes. We find…

星系天体物理 · 物理学 2015-06-19 Jong Hwan Lee , Myung Gyoon Lee

We present new radio observations of the recently identified, young Galactic supernova remnant (SNR) RX J0852.0-4622 (G266.2-01.2) made at 1.40 GHz with a resolution of 14.9 arcmin. These results, along with other radio observations from…

天体物理学 · 物理学 2007-05-23 A. R. Duncan , D. A. Green