Open AccessReflections on reflexions – II. Effects of light echoes on the luminosity and spectra of Type Ia supernovae
Author(s) -
Patat Ferdinando,
Benetti Stefano,
Cappellaro Enrico,
Turatto Massimo
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10451.x
Subject(s) - physics , supernova , astrophysics , luminosity , light curve , extinction (optical mineralogy) , spectral line , type (biology) , astronomy , optics , galaxy , ecology , biology
In this paper, we present and discuss the effects of scattered light echoes (LEs) on the luminosity and spectral appearance of Type Ia supernovae (SNe). After introducing the basic concept of LE spectral synthesis by means of LE models and real observations, we investigate the deviations from pure SN spectra, light and colour curves, the signatures that witness the presence of an LE and the possible inferences on the extinction law. The effects on the photometric parameters and spectral features are also discussed. In particular, for the case of circumstellar dust, LEs are found to introduce an apparent relation between the post‐maximum decline rate and the absolute luminosity, which is most likely going to affect the well‐known Pskowski–Phillips relation.