Type Ia supernova bolometric light curves and ejected mass estimates from the Nearby Supernova Factory
R. Scalzo
,
G. Aldering
,
P. Antilogus
(1)
,
C. Aragon
,
S. Bailey
,
C. Baltay
,
S. Bongard
(1)
,
C. Buton
,
F. Cellier-Holzem
(1)
,
M. Childress
,
N. Chotard
(2)
,
Y. Copin
(2)
,
H. K. Fakhouri
,
E. Gangler
(2)
,
J. Guy
(1)
,
A. Kim
,
M. Kowalski
,
M. Kromer
,
J. Nordin
,
P. Nugent
,
K. Paech
,
R. Pain
(1)
,
E. Pecontal
(3)
,
R. Pereira
(2)
,
S. Perlmutter
,
D. Rabinowitz
,
M. Rigault
(2)
,
K. Runge
,
C. Saunders
,
S. A. Sim
,
G. Smadja
(2)
,
C. Tao
,
S. Taubenberger
,
R. C. Thomas
,
B. A. Weaver
R. Scalzo
- Function : Author
G. Aldering
- Function : Author
P. Antilogus
- Function : Author
- PersonId : 741722
- IdHAL : pierre-antilogus
- ORCID : 0000-0002-0389-5706
- IdRef : 116029315
C. Aragon
- Function : Author
S. Bailey
- Function : Author
C. Baltay
- Function : Author
S. Bongard
- Function : Author
- PersonId : 742831
- IdHAL : sebastien-bongard
C. Buton
- Function : Author
M. Childress
- Function : Author
Y. Copin
- Function : Author
- PersonId : 48
- IdHAL : yannick-copin
- ORCID : 0000-0002-5317-7518
- IdRef : 15009728X
H. K. Fakhouri
- Function : Author
A. Kim
- Function : Author
M. Kowalski
- Function : Author
M. Kromer
- Function : Author
J. Nordin
- Function : Author
P. Nugent
- Function : Author
K. Paech
- Function : Author
R. Pain
- Function : Author
- PersonId : 742459
- IdHAL : reynald-pain
- ORCID : 0000-0003-4016-6067
- IdRef : 033075735
S. Perlmutter
- Function : Author
D. Rabinowitz
- Function : Author
M. Rigault
- Function : Author
- PersonId : 750032
- IdHAL : mickael-rigault
K. Runge
- Function : Author
C. Saunders
- Function : Author
S. A. Sim
- Function : Author
C. Tao
- Function : Author
S. Taubenberger
- Function : Author
R. C. Thomas
- Function : Author
B. A. Weaver
- Function : Author
Abstract
We present a sample of normal type Ia supernovae from the Nearby Supernova Factory dataset with spectrophotometry at sufficiently late phases to estimate the ejected mass using the bolometric light curve. We measure $^{56}$Ni masses from the peak bolometric luminosity, then compare the luminosity in the $^{56}$Co-decay tail to the expected rate of radioactive energy re- lease from ejecta of a given mass. We infer the ejected mass in a Bayesian context using a semi-analytic model of the ejecta, incorporating constraints from contemporary numerical models as priors on the density structure and distribution of $^{56}$Ni throughout the ejecta. We find a strong correlation between ejected mass and light curve decline rate, and consequently $^{56}$Ni mass, with ejected masses in our data ranging from 0.9-1.4 $M_\odot$. Most fast-declining (SALT2 $x_1 < -1$) normal SNe Ia have significantly sub-Chandrasekhar ejected masses in our fiducial analysis.