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Related papers: Supersoft X-Ray Nebulae in the Large Magellanic Cl…

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Accreting, steadily nuclear-burning white dwarfs are associated with so-called close-binary supersoft X-ray sources (SSSs), observed to have temperatures of a few$\times 10^{5}$K and luminosities on the order of $10^{38}$erg/s. These and…

High Energy Astrophysical Phenomena · Physics 2015-10-21 T. E. Woods , M. Gilfanov

Classical supersoft X-ray sources (SSSs) are understood as close binary systems in which a massive white dwarf (WD) accretes from its companion at rates sustaining steady hydrogen burning on its surface generating bolometric luminosities of…

High Energy Astrophysical Phenomena · Physics 2022-09-28 Augustin Skopal

Supersoft X-ray sources (SSS) have been identified as white dwarfs accreting from binary companions and undergoing nuclear-burning of the accreted material on their surface. Although expected to be a relatively numerous population from both…

High Energy Astrophysical Phenomena · Physics 2020-09-30 G. Vasilopoulos , F. Koliopanos , T. E. Woods , F. Haberl , M. D. Soraisam , A. Udalski

Type Ia supernovae are vital to our understanding of the Universe due to their use in measuring cosmological distances and their significance in enriching the interstellar medium with heavy elements. They are understood to be the…

High Energy Astrophysical Phenomena · Physics 2019-01-23 J. Kuuttila , M. Gilfanov , I. R. Seitenzahl , T. E. Woods , F. P. A. Vogt

We investigated four luminous supersoft X-ray sources (SSS) in the Magellanic Clouds suspected to have optical counterparts of Be spectral type. If the origin of the X-rays is in a very hot atmosphere heated by hydrogen burning in accreted…

Solar and Stellar Astrophysics · Physics 2018-08-15 V. Cracco , M. Orio , S. Ciroi , J. S. Gallagher , R. Kotulla , E. Romero-Colmenero

We present a new optical imaging survey of supernova remnants in M83, using data obtained with the Magellan I 6.5m telescope and IMACS instrument under conditions of excellent seeing. Using the criterion of strong [S II] emission relative…

Astrophysics of Galaxies · Physics 2015-06-11 William P. Blair , P. Frank Winkler , K. S. Long

There are insufficient super soft (~ 0.1 keV) X-ray sources in either spiral or elliptical galaxies to account for the rate of explosion of Type Ia supernovae in either the single degenerate or the double degenerate scenarios. We quantify…

High Energy Astrophysical Phenomena · Physics 2015-06-11 J. Craig Wheeler , David A. Pooley

Type Ia supernovae are understood to arise from the thermonuclear explosion of a carbon-oxygen white dwarf, yet the evolutionary mechanisms leading to such events remain unknown. Many proposed channels, including the classical…

High Energy Astrophysical Phenomena · Physics 2019-01-23 Or Graur , Tyrone E. Woods

In some luminous supersoft X-ray sources (SSSs), hydrogen accretes onto the surface of a white dwarf at rates more-or-less compatible with steady nuclear burning. The white dwarfs in these systems therefore have a good chance to grow in…

Astrophysics · Physics 2007-05-23 Rosanne Di Stefano

Aims: We present a detailed multi-wavelength study of four new supernova remnants (SNRs) in the Large Magellanic Cloud (LMC). The objects were identified as SNR candidates in X-ray observations performed during the survey of the LMC with…

High Energy Astrophysical Phenomena · Physics 2014-01-14 P. Maggi , F. Haberl , P. J. Kavanagh , S. D. Points , J. Dickel , L. M. Bozzetto , M. Sasaki , Y. -H. Chu , R. A. Gruendl , M. D. Filipovic , W. Pietsch

We present a new optical sample of three Supernova Remnants and 16 Supernova Remnant (SNR) candidates in the Large Magellanic Cloud(LMC). These objects were originally selected using deep H$\alpha$, [SII] and [OIII] narrow-band imaging.…

We carried out new $^{12}$CO($J$ = 1-0, 3-2) observations of a N63A supernova remnant (SNR) from the LMC using ALMA and ASTE. We find three giant molecular clouds toward the northeast, east, and near the center of the SNR. Using the ALMA…

We present a radio survey of X-ray sources in the Large and Small Magellanic clouds with the Australia Telescope Compact Array at 6.3 and 3.5 cm. Specifically, we have observed the fields of five LMC and two SMC supersoft X-ray sources, the…

Astrophysics · Physics 2009-10-30 R. P. Fender , K. Southwell , A. K. Tzioumis

Nebular-phase observations and spectral models of Type Ic superluminous supernovae are presented. LSQ14an and SN 2015bn both display late-time spectra similar to galaxy-subtracted spectra of SN 2007bi, and the class shows strong similarity…

In a canonical model, the progenitors of Type Ia supernovae (SNe Ia) are accreting, nuclear-burning white dwarfs (NBWDs), which explode when the white dwarf reaches the Chandrasekhar mass, M_C. Such massive NBWDs are hot (kT ~100 eV),…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Rosanne Di Stefano

This paper presents ASCA/SIS and ROSAT/HRI results of three supernova remnants (SNRs) in the Small Magellanic Cloud: 0103-726, 0045-734, and 0057-7226. The ROSAT/HRI images of these SNRs indicate that the most of the X-ray emissions are…

Astrophysics · Physics 2015-06-24 Jun Yokogawa , Kensuke Imanishi , Katsuji Koyama , Mamiko Nishiuchi , Norikazu Mizuno

The high sensitivity of the XMM-Newton instrumentation offers the opportunity to study faint and extended sources in the Milky Way and nearby galaxies such as the Large Magellanic Cloud (LMC) in detail. The ROSAT PSPC survey of the LMC has…

High Energy Astrophysical Phenomena · Physics 2015-06-03 M. -H. Grondin , M. Sasaki , F. Haberl , W. Pietsch , E. J. Crawford , M. D. Filipovic , L. M. Bozzetto , S. Points , R. C. Smith

The progenitors of supernovae (SNe) type Ia are usually assumed to be either a single white dwarf (WD) accreting from a non-degenerate companion (the SD channel) or the result of two merging WDs (DD channel). However, no consensus currently…

Solar and Stellar Astrophysics · Physics 2015-06-05 Mikkel Nielsen , Carsten Dominik , Gijs Nelemans , Rasmus Voss

This catalog comprises an up-to-date list of luminous (>10^36 erg/s) supersoft X-ray sources. We include in this catalog accreting binary sources of high luminosity which are thought to be in a state of (steady or recurrent) hydrogen…

Astrophysics · Physics 2015-06-24 J. Greiner

The supernova remnant (SNR) N49 in the Large Magellanic Cloud has been observed with the Advanced CCD Imaging Spectrometer (ACIS) on board the {\it Chandra X-Ray Observatory}. The superb angular resolution of the {\it Chandra}/ACIS images…

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