On the Interpretation of Supernova Light Echo Profiles and Spectra - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




On the Interpretation of Supernova Light Echo Profiles and Spectra - Astrophysics > Solar and Stellar Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: The light echo systems of historical supernovae in the Milky Way and localgroup galaxies provide an unprecedented opportunity to reveal the effects ofasymmetry on observables, particularly optical spectra. Scattering dust atdifferent locations on the light echo ellipsoid witnesses the supernova fromdifferent perspectives and the light consequently scattered towards Earthpreserves the shape of line profile variations introduced by asymmetries in thesupernova photosphere. However, the interpretation of supernova light echospectra to date has not involved a detailed consideration of the effects ofoutburst duration and geometrical scattering modifications due to finitescattering dust filament dimension, inclination, and image point-spreadfunction and spectrograph slit width. In this paper, we explore theimplications of these factors and present a framework for future resolvedsupernova light echo spectra interpretation, and test it against Cas A and SN1987A light echo spectra. We conclude that the full modeling of the dimensionsand orientation of the scattering dust using the observed light echoes at twoor more epochs is critical for the correct interpretation of light echospectra. Indeed, without doing so one might falsely conclude that differencesexist when none are actually present.



Author: A. Rest, B. Sinnott, D. L. Welch, R. J. Foley, G. Narayan, K. Mandel, M. Huber, S. Blondin

Source: https://arxiv.org/







Related documents