SIMBAD references

2019MNRAS.490.1605D - Mon. Not. R. Astron. Soc., 490, 1605-1619 (2019/December-1)

SN 2015an: a normal luminosity type II supernova with low expansion velocity at early phases.

DASTIDAR R., MISRA K., VALENTI S., BURKE J., HOSSEINZADEH G., GANGOPADHYAY A., HOWELL D.A., SINGH M., ARCAVI I., KUMAR B., McCULLY C., SANWAL P. and PANDEY S.B.

Abstract (from CDS):

We present the photometry and spectroscopy of SN 2015an, a type II Supernova (SN) in IC 2367. The recombination phase of the SN lasts up to 120 d, with a decline rate of 1.24 mag/100d, higher than the typical SNe IIP. The SN exhibits bluer colours than most SNe II, indicating higher ejecta temperatures. The absolute V-band magnitude of SN 2015an at 50 d is -16.83 ± 0.04 mag, pretty typical for SNe II. However, the 56Ni mass yield, estimated from the tail V-band light curve to be 0.021 ± 0.010 M, is comparatively low. The spectral properties of SN 2015an are atypical, with low H α expansion velocity and presence of high-velocity component of H α at early phases. Moreover, the continuum exhibits excess blue flux up to 50 d, which is interpreted as a progenitor metallicity effect. The high-velocity feature indicates ejecta-circumstellar material interaction at early phases. The semi-analytical modelling of the bolometric light curve yields a total ejected mass of 12 M, a pre-SN radius of 388 R and explosion energy of 1.8 foe.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: spectroscopic - supernovae: general - supernovae: individual: SN 2015an - galaxies: individual: IC 2367

Simbad objects: 25

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2019MNRAS.490.1605D and select 'bookmark this link' or equivalent in the popup menu


2021.10.25-16:24:37

© Université de Strasbourg/CNRS

    • Contact