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The prevalence and influence of circumstellar material around hydrogen-rich supernova progenitors
Rachel J. Bruch, Avishay Gal-Yam, Ofer Yaron +44
Narrow transient emission lines (flash-ionization features) in early supernova (SN) spectra trace the presence of circumstellar material (CSM) around the massive progenitor stars o…
Modeling continuum polarization levels of tidal disruption events based on the collision-induced outflow mode
Panos Charalampopoulos, Mattia Bulla, Clement Bonnerot +1
TDEs have been observed in the optical and UV for more than a decade but the underlying emission mechanism still remains a puzzle. It has been suggested that viewing angle effects…
A very luminous jet from the disruption of a star by a massive black hole
Igor Andreoni, Michael W. Coughlin, Daniel A. Perley +78
Tidal disruption events (TDEs) are bursts of electromagnetic energy released when supermassive black holes (SMBHs) at the centers of galaxies violently disrupt a star that passes t…
Diversity of dust properties in external galaxies confirmed by polarization signals from Type II supernovae
Takashi Nagao, Ferdinando Patat, Keiichi Maeda +8
Investigating interstellar (IS) dust properties in external galaxies is important not only to infer the intrinsic properties of astronomical objects but also to understand the star…
The Interaction of Supernova 2018evt with a Substantial Amount of Circumstellar Matter -- An SN1997cy-like Event
Yi Yang, Dietrich Baade, Peter Hoeflich +29
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line…
The critical role of nuclear heating rates, thermalization efficiencies and opacities for kilonova modelling and parameter inference
Mattia Bulla
We present an improved version of the 3D Monte Carlo radiative transfer code POSSIS to model kilonovae from neutron star mergers, wherein nuclear heating rates, thermalization effi…
Long-Term Simulations of Dynamical Ejecta: Homologous Expansion and Kilonova Properties
Anna Neuweiler, Tim Dietrich, Mattia Bulla +3
Accurate numerical-relativity simulations are essential to study the rich phenomenology of binary neutron star systems. In this work, we focus on the material that is dynamically e…
An asymmetric electron-scattering photosphere around optical tidal disruption events
Giorgos Leloudas, Mattia Bulla, Aleksandar Cikota +10
A star crossing the tidal radius of a supermassive black hole will be spectacularly ripped apart with an accompanying burst of radiation. A few tens of such tidal disruption events…
Multi-messenger constraints on the Hubble constant through combination of gravitational waves, gamma-ray bursts and kilonovae from neutron star mergers
Mattia Bulla, Michael W. Coughlin, Suhail Dhawan +1
The simultaneous detection of gravitational waves and light from the binary neutron star merger GW170817 led to independent measurements of distance and redshift, providing a direc…
An updated nuclear-physics and multi-messenger astrophysics framework for binary neutron star mergers
Peter T. H. Pang, Tim Dietrich, Michael W. Coughlin +18
The multi-messenger detection of the gravitational-wave signal GW170817, the corresponding kilonova AT2017gfo and the short gamma-ray burst GRB170817A, as well as the observed afte…
Hubble constant and nuclear equation of state from kilonova spectro-photometric light curves
M. A. Pérez-García, L. Izzo, D. Barba +17
The merger of two compact objects of which at least one is a neutron star is signalled by transient electromagnetic emission in a kilonova (KN). This event is accompanied by gravit…
In search of short gamma-ray burst optical counterpart with the Zwicky Transient Facility
Tomás Ahumada, Shreya Anand, Michael W. Coughlin +46
The Fermi Gamma-ray Burst Monitor (GBM) triggers on-board in response to 40 short gamma-ray bursts (SGRBs) per year; however, their large localization regions have made the…
Advancing the Landscape of Multimessenger Science in the Next Decade
Kristi Engel, Tiffany Lewis, Marco Stein Muzio +91
The last decade has brought about a profound transformation in multimessenger science. Ten years ago, facilities had been built or were under construction that would eventually dis…
SN 2018bsz: a Type I superluminous supernova with aspherical circumstellar material
M. Pursiainen, G. Leloudas, E. Paraskeva +26
We present a spectroscopic analysis of Type I superluminous supernova (SLSN-I), SN 2018bsz. While it closely resembles SLSNe-I, the multi-component H line appearing at …