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Impacts of the reaction rate on nucleosynthesis in pair-instability supernovae
Hiroki Kawashimo, Ryo Sawada, Yudai Suwa +3
Nuclear reactions are key to our understanding of stellar evolution, particularly the rate, which is known to significantly influence the…
Mass loss of massive helium star supernova progenitors shortly before explosion constrained by supernova radio properties
Takashi J. Moriya, Sung-Chul Yoon
Mass loss of massive helium stars is not well understood even though it plays an essential role in determining their remnant neutron-star or black-hole masses as well as ejecta mas…
Constraining red supergiant mass-loss prescriptions through supernova radio properties
Takashi J. Moriya
Supernova properties in radio strongly depend on their circumstellar environment and they are an important probe to investigate the mass loss of supernova progenitors. Recently, co…
The Carnegie Supernova Project II. The shock wave revealed through the fog: The strongly interacting Type IIn SN 2013L
F. Taddia, M. D. Stritzinger, C. Fransson +21
We present ultra-violet to mid-infrared observations of the long-lasting Type IIn supernova (SN) 2013L obtained by the Carnegie Supernova Project II (CSP-II). The spectra of SN 201…
Type IIn supernova light-curve properties measured from an untargeted survey sample
A. Nyholm, J. Sollerman, L. Tartaglia +19
We present a sample of supernovae Type IIn (SNe IIn) from the untargeted, magnitude-limited surveys of the Palomar Transient Factory (PTF) and its successor, the intermediate PTF (…
The interaction of core-collapse supernova ejecta with a stellar companion
Zheng-Wei Liu, T. M. Tauris, F. K. Roepke +4
The progenitors of many core-collapse supernovae (CCSNe) are expected to be in binary systems. By performing a series of three-dimensional hydrodynamical simulations, we investigat…
SN 2017ens: The Metamorphosis of a Luminous Broad-lined Type Ic Supernova into an SN IIn
T. -W. Chen, C. Inserra, M. Fraser +46
We present observations of supernova (SN) 2017ens, discovered by the ATLAS survey and identified as a hot blue object through the GREAT program. The redshift z=0.1086 implies a pea…
Related progenitor models for long-duration gamma ray bursts and Type Ic superluminous supernovae
David R. Aguilera-Dena, Norbert Langer, Takashi J. Moriya +1
We model the late evolution and mass loss history of rapidly rotating Wolf-Rayet stars in the mass range . We find that quasi-chemically…
Hydrogen-rich supernovae beyond the neutrino-driven core-collapse paradigm
G. Terreran, M. L. Pumo, T. -W. Chen +41
We present our study of OGLE-2014-SN-073, one of the brightest Type II SN ever discovered, with an unusually broad lightcurve combined with high ejecta velocities. From our hydrody…
The bumpy light curve of supernova iPTF13z
A. Nyholm, J. Sollerman, F. Taddia +10
A Type IIn supernova (SN) is dominated by the interaction of SN ejecta with the circumstellar medium (CSM). Some SNe IIn (e.g., SN 2006jd) have episodes of re-brightening ("bumps")…
A new route towards merging massive black holes
Pablo Marchant, Norbert Langer, Philipp Podsiadlowski +2
Recent advances in gravitational-wave astronomy make the direct detection of gravitational waves from the merger of two stellar-mass compact objects a realistic prospect. Evolution…
The interaction of core-collapse supernova ejecta with a companion star
Zheng-Wei Liu, Thomas M. Tauris, Friedrich K. Roepke +4
The progenitors of many CCSNe are expected to be in binary systems. After the SN explosion, the companion may suffer from mass stripping and be shock heated as a result of the impa…
Early ultraviolet signatures from the interaction of Type Ia supernova ejecta with a stellar companion
Zheng-Wei Liu, Takashi J. Moriya, Richard J. Stancliffe
The progenitors of SNe Ia are not yet fully understood. The two leading progenitor scenarios are the single-degenerate (SD) scenario and the double-degenerate scenario. In the SD s…
Envelope inflation in Wolf-Rayet stars and extended supernova shock breakout signals
Debashis Sanyal, Takashi J. Moriya, Norbert Langer
Massive, luminous stars reaching the Eddington limit in their interiors develop very dilute, extended envelopes. This effect is called envelope inflation. If the progenitors of Typ…
Type IIb Supernova 2013df Entering Into An Interaction Phase: A Link between the Progenitor and the Mass Loss
K. Maeda, T. Hattori, D. Milisavljevic +23
We report the late-time evolution of Type IIb Supernova (SN IIb) 2013df. SN 2013df showed a dramatic change in its spectral features at ~1 year after the explosion. Early on it sho…
Constraints on single-degenerate Chandrasekhar mass progenitors of Type Iax supernovae
Zheng-Wei Liu, Takashi J. Moriya, Richard J. Stancliffe +1
SNe Iax are proposed as one new sub-class of SNe Ia. SNe Iax have been estimated to account for ~5-30% of the total SN Ia rate, and most SNe Iax have been discovered in late-type g…
Pulsations of red supergiant pair-instability supernova progenitors leading to extreme mass loss
Takashi J. Moriya, Norbert Langer
Recent stellar evolution models show consistently that very massive metal-free stars evolve into red supergiants shortly before they explode. We argue that the envelopes of these s…
Interacting supernovae from photoionization-confined shells around red supergiant stars
Jonathan Mackey, Shazrene Mohamed, Vasilii V. Gvaramadze +5
Betelgeuse, a nearby red supergiant, is a runaway star with a powerful stellar wind that drives a bow shock into its surroundings. This picture has been challenged by the discovery…
Mass loss of massive stars near the Eddington luminosity by core neutrino emission shortly before their explosion
Takashi J. Moriya
We present a novel mechanism to enhance the mass-loss rates of massive stars shortly before their explosion. The neutrino luminosities of the stellar core of massive stars become l…
Mass-loss histories of Type IIn supernova progenitors within decades before their explosion
Takashi J. Moriya, Keiichi Maeda, Francesco Taddia +3
We present results of a systematic study of the mass-loss properties of Type IIn supernova progenitors within decades before their explosion. We apply an analytic light curve model…
Ultra-stripped Type Ic supernovae from close binary evolution
T. M. Tauris, N. Langer, T. J. Moriya +3
Recent discoveries of weak and fast optical transients raise the question of their origin. We investigate the minimum ejecta mass associated with core-collapse supernovae (SNe) of…
Four open questions in massive star evolution
Georges Meynet, Patrick Eggenberger, Sylvia Ekstrom +5
We discuss four questions dealing with massive star evolution. The first one is about the origin of slowly rotating, non-evolved, nitrogen rich stars. We propose that these stars m…
Properties of Newly Formed Dust Grains in The Luminous Type IIn Supernova 2010jl
K. Maeda, T. Nozawa, D. K. Sahu +15
Supernovae (SNe) have been proposed to be the main production sites of dust grains in the Universe. Our knowledge on their importance to dust production is, however, limited by obs…
Episodic modulations in supernova radio light curves from luminous blue variable supernova progenitor models
Takashi J. Moriya, Jose H. Groh, Georges Meynet
<Context> Ideally, one would like to know which type of core-collapse SNe is produced by different progenitors and the channels of stellar evolution leading to these progenitors. T…