output
19942026
Showing 2015 · astro-ph.HEShow all

14 papers · 2 filters

astro-ph.HE2015★ 66 cited

Radio observations of a sample of broad-lined type Ic supernovae discovered by PTF/iPTF: A search for relativistic explosions

A. Corsi, A. Gal-Yam, S. R. Kulkarni +15

Long duration gamma-ray bursts are a rare subclass of stripped-envelope core-collapse supernovae that launch collimated relativistic outflows (jets). All gamma-ray-burst-associated…

astro-ph.HE2015★ 27 cited

Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S

T. Kangas, S. Mattila, E. Kankare +30

We present photometric and spectroscopic observations of SN 2013fc, a bright type II supernova (SN) in a circumnuclear star-forming ring in the luminous infrared galaxy ESO 154-G01…

astro-ph.HE2015★ 22 cited

LSQ13fn: A type II-Plateau supernova with a possibly low metallicity progenitor that breaks the standardised candle relation

J. Polshaw, R. Kotak, L. Dessart +20

We present optical imaging and spectroscopy of supernova (SN) LSQ13fn, a type II supernova with several hitherto-unseen properties. Although it initially showed strong symmetric sp…

astro-ph.HE2015★ 69 cited

Type Ia supernovae from violent mergers of carbon-oxygen white dwarfs: polarisation signatures

M. Bulla, S. A. Sim, R. Pakmor +5

The violent merger of two carbon-oxygen white dwarfs has been proposed as a viable progenitor for some Type Ia supernovae. However, it has been argued that the strong ejecta asymme…

astro-ph.HE2015★ 9 cited

A thin-shell instability in collisionless plasma

M. E. Dieckmann, H. Ahmed, D. Doria +6

The thin-shell instability has been named as one process, which can generate entangled structures in astrophysical plasma on collisional (fluid) scales. It is driven by a spatially…

astro-ph.HE2015★ 93 cited

Measuring nickel masses in Type Ia supernovae using cobalt emission in nebular phase spectra

Michael J. Childress, D. John Hillier, Ivo Seitenzahl +34

The light curves of Type Ia supernovae (SNe Ia) are powered by the radioactive decay of Ni to Co at early times, and the decay of Co to Fe from ~60 days…

astro-ph.HE2015★ 47 cited

Detection of a Type IIn Supernova in Optical Follow-up Observations of IceCube Neutrino Events

M. G. Aartsen, K. Abraham, M. Ackermann +331

The IceCube neutrino observatory pursues a follow-up program selecting interesting neutrino events in real-time and issuing alerts for electromagnetic follow-up observations. In Ma…

astro-ph.HE2015★ 70 cited

The Destruction of the Circumstellar Ring of SN 1987A

Claes Fransson, Josefin Larsson, Katia Migotto +23

We present imaging and spectroscopic observations with HST and VLT of the ring of SN 1987A from 1994 to 2014. After an almost exponential increase of the shocked emission from the…

astro-ph.HE2015★ 135 cited

Deflagrations in hybrid CONe white dwarfs: a route to explain the faint Type Iax supernova 2008ha

M. Kromer, S. T. Ohlmann, R. Pakmor +7

Stellar evolution models predict the existence of hybrid white dwarfs (WDs) with a carbon-oxygen core surrounded by an oxygen-neon mantle. Being born with masses ~1.1 Msun, hybrid…

astro-ph.HE2015★ 48 cited

Calcium-Rich Gap Transients: Tidal Detonations of White Dwarfs?

P. H. Sell, T. J. Maccarone, R. Kotak +2

We hypothesize that at least some of the recently discovered class of calcium-rich gap transients are tidal detonation events of white dwarfs (WDs) by black holes (BHs) or possibly…

astro-ph.HE2015★ 3 cited

PIC simulation study of the interaction between a relativistically moving leptonic micro-cloud and ambient electrons

M. E. Dieckmann, G. Sarri, S. Markoff +2

The jets of compact accreting objects are composed of electrons and a mixture of positrons and ions. These outflows impinge on the interstellar or intergalactic medium and both pla…

astro-ph.HE2015★ 104 cited

Diversity in extinction laws of Type Ia supernovae measured between and

R. Amanullah, J. Johansson, A. Goobar +36

We present ultraviolet (UV) observations of six nearby Type~Ia supernovae (SNe~Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR)…

astro-ph.HE2015★ 69 cited

Polarisation spectral synthesis for Type Ia supernova explosion models

M. Bulla, S. A. Sim, M. Kromer

We present a Monte Carlo radiative transfer technique for calculating synthetic spectropolarimetry for multi-dimensional supernova explosion models. The approach utilises "virtual-…

astro-ph.HE2015★ 58 cited

GALEX Detection of Shock Breakout in Type II-P Supernova PS1-13arp: Implications for the Progenitor Star Wind

S. Gezari, D. O. Jones, N. E. Sanders +23

We present the GALEX detection of a UV burst at the time of explosion of an optically normal Type II-P supernova (PS1-13arp) from the Pan-STARRS1 survey at z=0.1665. The temperatur…