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Populations of evolved massive binary stars in the Small Magellanic Cloud II: Predictions from rapid binary evolution
C. Schürmann, X. -T. Xu, N. Langer +10
Massive star evolution plays a crucial role in astrophysics but bares large uncertainties. This problem becomes more severe by the majority of massive stars being born in close bin…
The origin and evolution of the normal Type Ia SN 2018aoz with infant-phase reddening and excess emission
Yuan Qi Ni, Dae-Sik Moon, Maria R. Drout +40
SN~2018aoz is a Type Ia SN with a -band plateau and excess emission in the infant-phase light curves 1 day after first light, evidencing an over-density of surface ir…
Stripped-envelope stars in different metallicity environments. II. Type I supernovae and compact remnants
David R. Aguilera-Dena, Bernhard Müller, John Antoniadis +4
Stripped-envelope stars can be observed as Wolf-Rayet (WR) stars, or as less luminous hydrogen-poor stars with low mass loss rates and transparent winds. Both types are potential p…
No Pulsar Companion Around the Nearest Low Mass White Dwarf
Tilemachos M. Athanasiadis, Nataliya K. Porayko, John Antoniadis +5
2MASS J050051.85093054.9 is the closest known low-mass helium-core white dwarf in a binary system. We used three high-band international LOFAR stations to perform a targeted sea…
Stripped-Envelope Stars in Different Metallicity Environments I. Evolutionary Phases, Classification and Populations
David R. Aguilera-Dena, Norbert Langer, John Antoniadis +5
Massive stars that become stripped of their hydrogen envelope through binary interaction or winds can be observed either as Wolf-Rayet stars, if they have optically thick winds, or…
A Search for Pulsar Companions Around Low-Mass White Dwarfs
Tilemachos M. Athanasiadis, Marina Berezina, John Antoniadis +4
We report on a search for pulsars at the positions of eight low-mass white dwarfs and one higher-mass white dwarf with the 100-m Effelsberg Radio Telescope. These systems have orbi…
Pre-collapse Properties of Superluminous Supernovae and Long Gamma-Ray Burst Progenitor Models
David R. Aguilera-Dena, Norbert Langer, John Antoniadis +1
We analyze the properties of 42 rapidly rotating, low metallicity, quasi-chemically homogeneously evolving stellar models in the mass range between 4 and 45 at…
Type Ia supernovae from non-accreting progenitors
John Antoniadis, Savvas Chanlaridis, Götz Gräfener +1
Type Ia supernovae (SNe Ia) are manifestations of stars deficient of hydrogen and helium disrupting in a thermonuclear runaway. While explosions of carbon-oxygen white dwarfs are t…
A Refined Search for Pulsations in White Dwarf Companions to Millisecond Pulsars
Mukremin Kilic, J. J. Hermes, A. H. Corsico +7
We present optical high-speed photometry of three millisecond pulsars with low-mass () white dwarf companions, bringing the total number of such systems with follo…
Discovery of a rapid, luminous nova in NGC 300 by the KMTNet Supernova Program
John Antoniadis, Dae-Sik Moon, Yuan Qi Ni +3
We present the discovery of a rapidly evolving transient by the Korean Microlensing Telescope Network Supernova Program (KSP). KSP is a novel high-cadence supernova survey that off…
An active, asynchronous companion to a redback millisecond pulsar
André van Staden, John Antoniadis
PSR\,J17232837 is a "redback" millisecond pulsar (MSP) with a low-mass companion in a 14.8\,h orbit. The system's properties closely resemble those of "transitional" MSPs that a…
An eccentric binary millisecond pulsar with a helium white dwarf companion in the Galactic Field
John Antoniadis, David L. Kaplan, Kevin Stovall +5
Low-mass white dwarfs (LMWDs) are believed to be exclusive products of binary evolution, as the Universe is not yet old enough to produce them from single stars. Because of the str…
Probing the neutron star interior and the Equation of State of cold dense matter with the SKA
Anna Watts, Renxin Xu, Cristobal Espinoza +15
With an average density higher than the nuclear density, neutron stars (NS) provide a unique test-ground for nuclear physics, quantum chromodynamics (QCD), and nuclear superfluidit…
On the formation of eccentric millisecond pulsars with helium white-dwarf companions
John Antoniadis
Millisecond pulsars (MSPs) orbiting helium white dwarfs (WDs) in eccentric orbits challenge the established binary evolution paradigm that predicts efficient orbital circularizatio…
The timescale of low-mass proto-helium white dwarf evolution
Alina Istrate, Thomas Tauris, Norbert Langer +1
A large number of low-mass (< 0.20 M_sun) helium white dwarfs (He WDs) have recently been discovered. The majority of these are orbiting another WD or a millisecond pulsar (MSP) in…
Gravitational Radiation from Compact Binary Pulsars
John Antoniadis
An outstanding question in modern Physics is whether general relativity (GR) is a complete description of gravity among bodies at macroscopic scales. Currently, the best experiment…
A white dwarf companion to the relativistic pulsar PSR J1141-6545
J. Antoniadis, C. G. Bassa, N. Wex +2
Pulsars with compact companions in close eccentric orbits are unique laboratories for testing general relativity and alternative theories of gravity. Moreover, they are excellent t…