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To better model the efficient production of cosmic rays (CRs) in supernova remnants (SNRs) with the associated coupling between CR production and SNR dynamics, we have generalized an existing cr-hydro-NEI code (i.e., Ellison et al. 2012) to…

高能天体物理现象 · 物理学 2015-06-04 Shiu-Hang Lee , Donald C. Ellison , Shigehiro Nagataki

We examine and analyze the physical processes that should be taken into account when modeling young type-Ia SNRs, with ages of several hundred years. It is shown, that energy losses in the metal-rich ejecta can be essential for remnants…

天体物理学 · 物理学 2009-11-10 E. I. Sorokina , S. I. Blinnikov , D. I. Kosenko , P. Lundqvist

Optical spectra of 14 emission-line galaxies representative of the 1999 NICMOS parallel grism Ha survey of McCarthy et al. are presented. Of the 14, 9 have emission lines confirming the redshifts found in the grism survey. The higher…

天体物理学 · 物理学 2009-11-07 Erin K. S. Hicks , Matthew A. Malkan , Harry I. Teplitz , Patrick J. McCarthy , Lin Yan

Supernova remnants (SNRs) are diffuse extended sources characterized by a complex morphology and a non-uniform distribution of ejecta. Such a morphology reflects pristine structures and features of the progenitor supernova (SN) and the…

高能天体物理现象 · 物理学 2017-10-25 S. Orlando , M. Miceli , O. Petruk

We present a spatially resolved study of the kinematical properties of known supernova remnants (SNRs) in the nearest galaxies of the SIGNALS survey, namely NGC 6822 (one object) and M33 (163 objects), based on data obtained with the…

A systematic study of the synchrotron X-ray emission from supernova remnants (SNRs) has been conducted. We selected a total of 12 SNRs whose synchrotron X-ray spectral parameters are available in the literature with reasonable accuracy, and…

高能天体物理现象 · 物理学 2015-06-03 Ryoko Nakamura , Aya Bamba , Tadayasu Dotani , Manabu Ishida , Ryo Yamazaki , Kazunori Kohri

A simple formalism to describe nonthermal electron acceleration, evolution, and radiation in supernova remnants (SNRs) is presented. The electron continuity equation is analytically solved assuming that the nonthermal electron injection…

高能天体物理现象 · 物理学 2015-06-04 Justin D. Finke , Charles D. Dermer

The ESO Supernova Progenitor Survey (SPY) has identified 58 (mostly helium-rich) subluminous O stars. We use the Balmer line strength to distinguish sdO from He-sdO (no Balmer lines) and present the results of the analyses of high…

天体物理学 · 物理学 2007-05-23 A. Stroeer , U. Heber , T. Lisker , R. Napiwotzki , S. Dreizler

One of the outstanding mysteries surrounding the rich diversity found in supernova remnants (SNRs) is the recent discovery of over-ionized or recombining plasma from a number of dynamically evolved objects. To help decipher its formation…

高能天体物理现象 · 物理学 2022-10-26 Miho Katsuragawa , Shiu-Hang Lee , Hirokazu Odaka , Aya Bamba , Hideaki Matsumura , Tadayuki Takahashi

We aim to test the plausibility of a theoretical framework in which the gamma-ray emission detected from supernova remnants may be of hadronic origin, i.e., due to the decay of neutral pions produced in nuclear collisions involving…

高能天体物理现象 · 物理学 2015-05-27 Damiano Caprioli

We present new pre-maximum and late-time optical photometry of the Type Ia/IIn supernova 2002ic. These observations are combined with the published V-band magnitudes of Hamuy et al. (2003) and the VLT spectrophotometry of Wang et al. (2004)…

天体物理学 · 物理学 2009-11-10 W. M. Wood-Vasey , L. Wang , G. Aldering

The results of the 2D modelling of Supernova remnant (SNR) RCW86 are given. Models of this remnant, which for the first time interpret the anisotropy of surface brightness as a result of the evolution of adiabatic SNR in the interstellar…

天体物理学 · 物理学 2007-05-23 O. Petruk

We analyze more than 15 years of the \gr\ data, obtained with the Large Area Telescope (LAT) onboard {\it the Fermi Gamma-ray Space Telescope (Fermi)}, for the region of the young supernova remnant (SNR) RCW~103, since the nearby source…

高能天体物理现象 · 物理学 2024-06-28 Yi Xing , Zhongxiang Wang , Dong Zheng

We present a table of 215 SNRs with distances. New distances are found to SNR G$51.26+0.11$ of $6.6 \pm 1.7$ kpc using HI absorption spectra, and to 5 other SNRs using maser/molecular cloud associations. We recalculate the distances and…

高能天体物理现象 · 物理学 2022-11-30 S. Ranasinghe , D. Leahy

In this paper we present calculations of the UV luminosity function from the Dark-ages Reionization And Galaxy-formation Observables from Numerical Simulations (DRAGONS) project, which combines N-body, semi-analytic and semi-numerical…

The emission of supernova remnants reflects the properties of both the progenitor supernovae and the surrounding environment. The complex morphology of the remnants, however, hampers the disentanglement of the two contributions. Here we aim…

高能天体物理现象 · 物理学 2015-09-23 S. Orlando , M. Miceli , M. L. Pumo , F. Bocchino

We construct the most complete sample of supernova remnants (SNRs) in any galaxy - the Large Magellanic Cloud (LMC) SNR sample. We study their various properties such as spectral index ($\alpha$), size and surface-brightness. We suggest an…

Supernova remnants (SNRs) are thought to be one of the major acceleration sites of galactic cosmic rays (CRs) and an important class of objects for high-energy astrophysics. SNRs produce multi-wavelength, non-thermal emission via…

高能天体物理现象 · 物理学 2019-05-08 Haruo Yasuda , Shiu-Hang Lee

We carry out a comprehensive study of HI 21 cm line observations and $^{13}$CO line observations of 21 supernova remnants (SNRs). The aim of the study is to search for HI absorption features to obtain kinematic distances in a consistent…

星系天体物理 · 物理学 2018-08-29 S. Ranasinghe , D. A. Leahy

In order to determine the Galactic distribution of supernova remnants (SNRs) there are two main difficulties: (i) there are selection effects which mean that catalogues of SNRs are not complete, and (ii) distances are not available for most…

星系天体物理 · 物理学 2015-06-11 D. A. Green