2022A&A...658A.179L


Query : 2022A&A...658A.179L

2022A&A...658A.179L - Astronomy and Astrophysics, volume 658A, 179-179 (2022/2-1)

Type Iax supernovae from deflagrations in Chandrasekhar mass white dwarfs.

LACH F., CALLAN F.P., BUBECK D., ROPKE F.K., SIM S.A., SCHRAUTH M., OHLMANN S.T. and KROMER M.

Abstract (from CDS):


Context. Due to the ever increasing number of observations during the past decades, Type Ia supernovae are nowadays regarded as a heterogeneous class of optical transients consisting of several subtypes. One of the largest of these subclasses is the class of Type Iax supernovae. They have been suggested to originate from pure deflagrations in carbon-oxygen Chandrasekhar mass white dwarfs because the outcome of this explosion scenario is in general agreement with their subluminous nature.
Aims. Although a few deflagration studies have already been carried out, the full diversity of the class has not been captured yet. This, in particular, holds for the faint end of the subclass. We therefore present a parameter study of single-spot ignited deflagrations in Chandrasekhar mass white dwarfs varying the location of the ignition spark, the central density, the metallicity, and the composition of the white dwarf. We also explore a rigidly rotating progenitor to investigate whether the effect of rotation can spawn additional trends.
Methods. We carried out three-dimensional hydrodynamic simulations employing theLEAFS code. Subsequently, detailed nucleosynthesis results were obtained with the nuclear network codeYANN. In order to compare our results to observations, we calculated synthetic spectra and light curves with theARTIS code.
Results. The new set of models extends the range in brightness covered by previous studies to the lower end. Our single-spot ignited explosions produce 56Ni masses from 5.8 x 10–3 to 9.2 x 10–2 M. In spite of the wide exploration of the parameter space, the main characteristics of the models are primarily driven by the mass of 56Ni and form a one-dimensional sequence. Secondary parameters seem to have too little impact to explain the observed trend in the faint part of the Type Iax supernova class. We report kick velocities of the gravitationally bound explosion remnants from 6.9 to 369.8 km/s. The magnitude as well as the direction of the natal kick is found to depend on the strength of the deflagration.
Conclusions. This work corroborates the results of previous studies of deflagrations in Chandrasekhar mass white dwarfs. The wide exploration of the parameter space in initial conditions and viewing angle effects in the radiative transfer lead to a significant spread in the synthetic observables. The trends in observational properties toward the faint end of the class are, however, not reproduced. This motivates a quantification of the systematic uncertainties in the modeling procedure and the influence of the 56Ni-rich bound remnant to get to the bottom of these discrepancies. Moreover, while the pure deflagration scenario remains a favorable explanation for bright and intermediate luminosity Type Iax supernovae, our results suggest that other mechanisms also contribute to this class of events.

Abstract Copyright: © ESO 2021

Journal keyword(s): hydrodynamics - radiative transfer - instabilities - white dwarfs - supernovae: general - methods: numerical

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 2005hk SN* 00 27 50.89 -01 11 53.3   15.92       SNIax 211 1
2 SNR G130.7+03.1 SNR 02 05 37.0 +64 49 42           ~ 592 4
3 SN 2019muj SN* 02 26 18.472 -09 50 09.92           SNIax 8 0
4 SN 2012Z SN* 03 22 05.39641 -15 23 14.9390           SNIax 106 1
5 SN 2009ku SN* 03 29 53.232 -28 05 12.12           SNIapec 27 1
6 SN 2011ay SN* 07 02 34.06 +50 35 25.0           SNIapec 39 1
7 SN 2010ae SN* 07 15 54.65 -57 20 36.9           SNIax 51 1
8 SN 2015H SN* 10 54 42.16 -21 04 13.8           SNIapec 21 1
9 SN 2014dt SN* 12 21 57.57 +04 28 18.5           SNIapec 44 1
10 SN 2020kyg SN* 13 11 39.603 +22 54 55.85           SNIa 2 0
11 SN 2002cx SN* 13 13 49.72 +06 57 31.9   17.68       SNIapec 213 1
12 SN 2005cs SN* 13 29 53.37 +47 10 28.2   14.5       SNIIP 375 1
13 GD 492 WD* 14 06 35.4162372480 +74 18 58.013654688   15.80 15.51 16.16   DZ 28 0
14 SN 2019gsc SN* 14 37 45.204 +52 43 36.31           SNIax 9 0
15 SN 2018cxk SN* 17 14 22.207 +48 15 51.76           SNIa 5 0
16 NAME Sgr A East Rad 17 45 41 -29 00.8           ~ 477 2
17 SN 2014ck SN* 22 45 38.88 +73 09 42.7           SNIapec 22 1
18 PTF 09eoi SN* 23 24 12.87 +12 46 42.6           ~ 5 0
19 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 170 1
20 SN 2014ek SN* 23 56 06.55 +29 22 42.3           SNIa 10 0

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2022.09.26-09:24:34

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