A Scattered Light Echo around SN 1993J in M81
نویسندگان
چکیده
منابع مشابه
A Scattered Light Echo around SN 1993 J in M 81
A light echo around SN 1993J was observed 8.2 years after explosion by a HST WFPC2 observation, adding to the small family of supernovae with light echoes. The light echo was formed by supernova light scattered from a dust sheet, which lies 220 parsecs away from the supernova, 50 parsecs thick along the line of sight, as inferred from radius and width of the light echo. The dust inferred from t...
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We present optical photometry of SN 1993J in M81 over the period 1993 March 30 to 1994 March 28, exactly one year after its discovery, recalibrating early data we had published in a previous paper and describing new data which cover the latter six months. At late times, the supernova's luminosity declined exponentially in BV RI, at a rate much faster than that of most Type II SNe. The rate of d...
متن کاملSimulated Radio Images and Light Curves of SN 1993J
We present calculations of the radio images and light curves from supernovae, based on high-resolution numerical simulations of the hydrodynamics and radiation transfer in a spherically symmetric medium. As a specific example we model the emission from SN1993J. This supernova does not appear to be expanding in a self-similar fashion, and cannot be adequately fitted with the often-used analytic ...
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The late light curves of SN 1989B exhibited an emission excess relative to other type Ia supernovae. We investigate whether this emission excess suggests light echo emission from this supernova, or rather intense background galaxy contamination at the location of the supernova. We conclude that stellar emission can better explain the late spectra, and that the emission excess is likely due to b...
متن کاملMultiple Light Echoes from Supernova 1993
Using the technique of PSF-matched image subtraction, we have analyzed archival HST/WFPC2 data to reveal details of at least two light-echo structures, including some unknown before now, around SN 1993J in the galaxy M81. In particular, we see one partial sheet of material 81 pc in front of the SN and tilted ∼ 60 • relative to the disk plane of M81, and another 220 pc in front of the SN, roughl...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/344719