Infrared and optical evidence for a dust cloud behind supernova 1987A

  title={Infrared and optical evidence for a dust cloud behind supernova 1987A},
  author={James Edgar Felten and Eli Dwek},
THE 8–13-μm flux from supernova 1987A has increased substantially1 since around May 1988 (∼ 450 days after the explosion), and the 8–13-μm source has been resolvable1, having a full width at half maximum of ∼1.5" in September 1988. This is attributed1 to re-radiation by an asymmetric circumstellar dust cloud, located mainly behind the supernova at a distance of ∼200 light days. This cloud may be related to the gas shell inferred from ultraviolet lines2,3. Here we extend the calculations of… 

Far-infrared observations of thermal dust emission from supernova 1987A

INFRARED observations of supernova 1987A are important for studying both the evolution of the ejecta and its interaction with the surrounding interstellar medium. Here we report observtions of

Infrared Emission from SN 1987A: Light Echoes or Dust Formation?

The presence of an infrared (IR) continuum in the spectrum of SN 1987A was discovered in the early stages of its evolution by various photometric and spectral observations in the 5 — 20 µm wavelength

Optical and infrared photometry of the Type IIn SN 1998S: days 11–146

We present contemporaneous optical and infrared (IR) photometric observations of the Type IIn SN 1998S covering the period between 11 and 146 d after discovery. The IR data constitute the first ever

Dust Condensation in the Ejecta of SN 1987A

Work at ESO on the formation of dust from newly synthesized elements in the ejecta of SN 1987A began in late January when blue shifts of ≃ 600 km s-1 were found for various optical emission lines in

Helium abundance and asymmetry in the wind from the precursor to supernova 1987A

TO explain why the progenitor of supernova 1987A exploded as a blue supergiant star, models of stellar evolution require that there must have been extensive mixing into the hydrogen-rich envelope of

Constraining the Amount of Circumstellar Matter and Dust around Type Ia Supernovae through Near-Infrared Echoes

The circumstellar (CS) environment is key to understanding progenitors of type Ia supernovae (SNe Ia), as well as the origin of a peculiar extinction property toward SNe Ia for cosmological

Circumstellar and Interstellar Interaction Around SN 1987A

A remarkable property of SN1987A is that it exploded as a blue star. Because such stars have fast stellar winds, the gas density immediately surrounding the supernova was low and the observable

The envelope thickens



Old cold dust heated by supernova 1987A

The mid-infrared emission (at wavelengths near 10 μm) from SN1987A, which had been fading steadily since reaching a peak about 120 days after outburst, began to increase again on about day 4501. This

The infrared echo of a type II supernova with a circumstellar dust shell: applications to SN 1979c and SN 1980k

Merrill (1980) and Telesco et al. (1981) have reported observations according to which supernovae developed a thermal infrared excess about 7-9 months after visual maximum. The two supernovae

Circumstellar infrared and scattered light echoes from SN 1987A

The observed light curve and temperature evolution and the theoretically predicted initial UV burst of SN 1987A are used to construct models for the IR echo and scattered-light echo arising from

Circumstellar matter of SN1987A and soft X-ray emission

X-ray emission from supernova 1987A has been observed continually by the Ginga satellite since July 1987. The observed X-ray spectrum1,2 has two components: hard X-rays, above 15 keV in energy, have

Detection of a very bright source close to the LMC supernova SN 1987A

High angular resolution observations of the supernova in the Large Magellanic Cloud, SN 1987A, have revealed a bright source separated from the SN by approximately 60 mas with a magnitude difference

Narrow ultraviolet emission lines from SN 1987A - Evidence for CNO processing in the progenitor

Results from UV observations of SN 1987A with the IUE satellite are presented, showing that emission lines of He II, C III, N III, N IV, N V, and O III increase in strength with time after May 24,

The infrared echo of Type II supernovae with circumstellar dust shells. II - A probe into the presupernova evolution of the progenitor star

This paper studies the spectral appearance and evolution of the infrared light curve, also referred to as the infrared echo, of Type II supernovae embedded in carbon- or oxygen-rich circumstellar

SN 1987A in the LMC - UBVRI photometry at Cerro Tololo

The paper presents UBVRI photometry of the Type II supernova 1987A in the Large Magellanic Cloud for the first 177 days since outburst. This photometry is used to construct the bolometric luminosity

The scattered light echo of a supernova

A theoretical model of the scattering of SN radiation by a dusty circumstellar envelope is constructed and applied to observational data on SN 1979c and SN 1980k. The scattered-light curves are

Observed Properties of Interstellar Dust

Recent information on the observed properties of interstellar dust is reviewed, with an attempt made to clarify some of the observational uncertainties associated with obtaining dust parameters.