Physical Properties of Type II Supernovae Inferred from ZTF and ATLAS Photometric Data
arxiv(2024)
摘要
We report an analysis of a sample of 186 spectroscopically confirmed Type II
supernova (SN) light curves (LCs) obtained from a combination of Zwicky
Transient Facility (ZTF) and Asteroid Terrestrial-impact Last Alert System
(ATLAS) observations. We implement a method to infer physical parameters from
these LCs using hydrodynamic models that take into account the progenitor mass,
the explosion energy, and the presence of circumstellar matter (CSM). The CSM
is modelled via the mass loss rate, wind acceleration at the surface of the
progenitor star with a β velocity law, and the CSM radius. We also infer
the time of explosion, attenuation (A_V), and the redshift for each SN. Our
results favor low-mass progenitor stars (M_ZAMS <14 M_⊙) with a
dense CSM (Ṁ > 10^-3 [M_⊙ yr^-1], a CSM radius of
∼ 10^15 cm, and β > 2). Additionally, we find that the
redshift inferred from the supernova LCs is significantly more accurate than
that inferred using the host galaxy photometric redshift, suggesting that this
method could be used to infer more accurate host galaxy redshifts from large
samples of SNe II in the LSST era. Lastly, we compare our results with similar
works from the literature.
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