Query : 2018A&A...619A.145O

2018A&A...619A.145O - Astronomy and Astrophysics, volume 619A, 145-145 (2018/11-1)

Systematic study of magnetar-powered hydrogen-rich supernovae.


Abstract (from CDS):

Context. It has been suggested that some supernovae (SNe) may be powered by a magnetar formed at the moment of the explosion. While this scenario has mostly been applied to hydrogen-free events, it may also be possible for hydrogen-rich objects.
Aims. We aim to explore the effect of including a magnetar on the light curves of supernovae with H-rich progenitors.
Methods. We have applied a version of our one-dimensional local thermodynamic equilibrium radiation hydrodynamics code that takes into account the relativistic motion of the ejecta caused by the extra energy provided by the magnetar. For a fixed red supergiant (RSG) progenitor, we have obtained a set of light curves that corresponds to different values of the magnetar initial rotation energy and the spin-down timescale. The model is applied to SN 2004em and OGLE-2014-SN-073, two peculiar Type II SNe with long-rising SN 1987A-like light curves, although with much larger luminosities.
Results. The presence of a plateau phase in either normal or superluminous supernovae is one possible outcome, even if a magnetar is continuously injecting energy into the ejecta. In other cases, the light curve shows a peak but not a plateau. Also, there are intermediate events with a first peak followed by a slow decline and a late break of the declining slope. Our models show that bright and long rising morphologies are possible even assuming RSG structures.
Conclusions. A large number of supernova discoveries per year reveal unexpected new types of explosions. According to our results, SLSNe II-P are to be expected, as well as a variety of light curve morphologies that can all be possible signs of a newly born magnetar.

Abstract Copyright: © ESO 2018

Journal keyword(s): supernovae: general - supernovae: individual: OGLE-2014-SN-073 - supernovae: individual: SN 2004em - supernovae: individual: peculiar - 87A

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 PTF 11mnb SN* 00 34 13.25 +02 48 31.4           ~ 12 0
2 SN 2006gy SN* 03 17 27.06 +41 24 19.5       14.20   SNIIn 305 1
3 OGLE 2014-SN-73 SN* 05 28 51.63 -62 20 16.1           SNII 23 0
4 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4626 2
5 SN 2005bf SN* 10 23 56.99 -03 11 29.3     18.0     SNIb 174 1
6 SN 2008es SN* 11 56 49.13 +54 27 25.7           SNIIL 105 1
7 SN 2004em SN* 19 31 31.11 +35 52 15.7     17.5     SNII 18 1

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