We investigate the destruction of dust grains by sputtering in the high-velocity interstellar shocks driven by supernovae (SNe) in the early universe to reveal the dependence of the time-scale of dust destruction on the gas density nH,0 in the interstellar medium (ISM) as well as on the progenitor mass Mpr and explosion energy E51 of SN. The sputtering yields for the combinations of dust and io...

An optical photometric and spectroscopic analysis of the slowly-evolving Type IIn SN 2007rt is presented, covering a duration of 481 days after discovery. Its earliest spectrum, taken approximately 100 days after the explosion epoch, indicates the presence of a dense circumstellar medium, with which the supernova ejecta is interacting. This is supported by the slowly-evolving light curve. A not...

We report the discovery of an extensive system of scattered light echo arclets associated with the recent supernovae in the local neighbourhood of the Milky Way: Tycho (SN 1572) and Cassiopeia A. Existing work suggests that the Tycho SN was a thermonuclear explosion while the Cas A supernova was a core collapse explosion. Precise classifications according to modern nomenclature require spectra ...

Abstract The dust temperature and mass of the supernova remnants (SNRs) in M31 are estimated by fitting infrared spectral energy distribution calculated from images Spitzer/IRAC4 MIPS24, Herschel/PACS70, 100, 160, Herschel/SPIRE 250 350 μ m bands. Twenty SNRs with relatively reliable photometry exhibit an average <mml:math xmlns:mml="http://www.w3.org/1998/Math/...

We report the discovery of the progenitor of the recent type IIn SN 2008S in the nearby galaxy NGC 6946. Surprisingly, it was not found in deep, pre-explosion optical images of its host galaxy taken with the Large Binocular Telescope, but only through examination of archival Spitzer mid-IR data. A source coincident with the SN 2008S position is clearly detected in the 4.5, 5.8, and 8.0 μm IRAC ...

We briefly review the existing database of supernova spectropolarimetry, concentrating on recent data and on results from our group’s research. Spectropolarimetry provides the only direct known probe of early-time supernova geometry. To obtain reliable conclusions, however, it is very important to correctly account for interstellar polarization. We find that Type IIn supernovae (SNe IIn) tend t...

Many industrial processes involving the presence of dust and combustible dust, suspended or accumulated in form deposits, have potential to lead a fire, explosion decomposition oxygen. As damage caused by an is generally greater than that explosions flammable gases vapours, special attention must be paid measures means protection prevention dust. A can only occur if there mainly potentially exp...

PURPOSE To elucidate the manifestations of ocular injuries in the colored corn starch dust explosion at a Taiwan water park. METHODS This is a retrospective, non-comparative, consecutive-interventional case series. Fifty explosion-injury patients on 27 June 2015 treated at Chang-Gung Memorial Hospital, Linkou, were included. Thorough ophthalmic examinations were based on emergent triage and c...

The dynamics of the nebula N 59 (B053540-6736), located at the boundary of the supershell LMC 4 in the Large Magellanic Cloud, is studied using a scanning Fabry-Perot in-terferometer. It is shown that the nebulae NGC 2032 and 2035, which form the bright core of the H II region N 59A (B053530-6736), belong to a single H II region which looks divided due to the presence of a heavy dust lane. This...