2010ApJ...723L..98K

Query : 2010ApJ...723L..98K

2010ApJ...723L..98K - Astrophys. J., 723, L98-L102 (2010/November-1)

Rapidly decaying supernova 2010X: a candidate ".Ia" explosion.

KASLIWAL M.M., KULKARNI S.R., GAL-YAM A., YARON O., QUIMBY R.M., OFEK E.O., NUGENT P., POZNANSKI D., JACOBSEN J., STERNBERG A., ARCAVI I., HOWELL D.A., SULLIVAN M., RICH D.J., BURKE P.F., BRIMACOMBE J., MILISAVLJEVIC D., FESEN R., BILDSTEN L., SHEN K., CENKO S.B., BLOOM J.S., HSIAO E., LAW N.M., GEHRELS N., IMMLER S., DEKANY R., RAHMER G., HALE D., SMITH R., ZOLKOWER J., VELUR V., WALTERS R., HENNING J., BUI K. and McKENNA D.

Abstract (from CDS):

We present the discovery, photometric, and spectroscopic follow-up observations of SN 2010X (PTF 10bhp). This supernova decays exponentially with τ_ d_= 5 days and rivals the current recordholder in speed, SN 2002bj. SN 2010X peaks at Mr= -17 mag and has mean velocities of 10,000 km/s. Our light curve modeling suggests a radioactivity-powered event and an ejecta mass of 0.16 M☉. If powered by Nickel, we show that the Nickel mass must be very small (~0.02 M☉) and that the supernova quickly becomes optically thin to γ-rays. Our spectral modeling suggests that SN 2010X and SN 2002bj have similar chemical compositions and that one of aluminum or helium is present. If aluminum is present, we speculate that this may be an accretion-induced collapse of an O-Ne-Mg white dwarf. If helium is present, all observables of SN 2010X are consistent with being a thermonuclear helium shell detonation on a white dwarf, a ".Ia" explosion. With the 1 day dynamic-cadence experiment on the Palomar Transient Factory, we expect to annually discover a few such events.

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Journal keyword(s): supernovae: general - supernovae: individual (SN2010X, SN2002bj) - surveys - white dwarfs

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* S And No* 00 42 43.12368 +41 16 03.2124           ~ 190 2
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 SN 2005E SN* 02 39 14.34 +01 05 55.0     16.8     SNIb/c 128 1
4 NGC 1573A GiG 04 48 26.849 +73 28 08.71   14.6       ~ 26 0
5 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 85 1
6 NGC 1821 Sy2 05 11 46.108 -15 08 04.92   13.9   13.09 13.3 ~ 37 0
7 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 86 1
8 SN 2007ax SN* 08 22 43.26 +22 33 16.9     17.2     SNIap 70 1
9 SN 2004aw SN* 11 57 50.24 +25 15 55.1   18.06       SNIc 209 1
10 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 612 1
11 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 795 1
12 SN 2005cz SN* 12 37 27.85 +74 11 24.5     16.0     SNIb 56 1
13 SN 1939B SN* 12 42 02 +11 37.9   12.3       SNI 55 1
14 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 645 1
15 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 203 1

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