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OGLE-2014-SN-073 as a fallback accretion powered supernova
Takashi J. Moriya, Giacomo Terreran, Sergei I. Blinnikov
We investigate the possibility that the energetic Type II supernova OGLE-2014-SN-073 is powered by a fallback accretion following the failed explosion of a massive star. Taking mas…
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…
SN 2016jhj at redshift 0.34: extending the Type II supernova Hubble diagram using the standard candle method
T. de Jaeger, L. Galbany, A. V. Filippenko +16
Although Type Ia supernova cosmology has now reached a mature state, it is important to develop as many independent methods as possible to understand the true nature of dark energy…
Search for Thermal X-ray Features from the Crab nebula with Hitomi Soft X-ray Spectrometer
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +192
The Crab nebula originated from a core-collapse supernova (SN) explosion observed in 1054 A.D. When viewed as a supernova remnant (SNR), it has an anomalously low observed ejecta m…
Superluminous transients at AGN centers from interaction between black-hole disk winds and broad-line region clouds
Takashi J. Moriya, Masaomi Tanaka, Tomoki Morokuma +1
We propose that superluminous transients that appear at central regions of active galactic nuclei (AGNs) such as CSS100217:102913+404220 (CSS100217) and PS16dtm, which reach near o…
Magnetar-Powered Supernovae in Two Dimensions. II. Broad-Line Supernovae Ic
Ke-Jung Chen, Takashi J. Moriya, Stan Woosley +4
Nascent neutron stars with millisecond periods and magnetic fields in excess of Gauss can drive highly energetic and asymmetric explosions known as magnetar-powered super…
Formation of Double Neutron Star Systems
T. M. Tauris, M. Kramer, P. C. C. Freire +11
Double neutron star (DNS) systems represent extreme physical objects and the endpoint of an exotic journey of stellar evolution and binary interactions. Large numbers of DNS system…
Ultra-luminous X-ray sources and neutron-star-black-hole mergers from very massive close binaries at low metallicity
Pablo Marchant, Norbert Langer, Philipp Podsiadlowski +4
Gravitational waves from the binary black hole (BH) merger GW150914 may enlighten our understanding of ultra-luminous X-ray sources (ULXs), as BHs>30Msun can reach luminosities>4x1…
Immediate dense circumstellar environment of supernova progenitors caused by wind acceleration: its effect on supernova light curves
Takashi J. Moriya, Sung-Chul Yoon, Götz Gräfener +1
Type IIP supernova progenitors are often surrounded by dense circumstellar media that may result from mass-loss enhancement of the progenitors shortly before their explosions. Prev…
The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
H. Aihara, N. Arimoto, R. Armstrong +139
Hyper Suprime-Cam (HSC) is a wide-field imaging camera on the prime focus of the 8.2m Subaru telescope on the summit of Maunakea in Hawaii. A team of scientists from Japan, Taiwan…
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")…