18 citations · 40 across the 27 of their papers we have counts for
29 papers
Gravitational wave signatures of subsolar neutron star formation in collapsar disks
Vishal Baibhav, Valerio De Luca, Loris Del Grosso +3
Standard models for stellar core collapse predict the birth of neutron stars with masses exceeding a solar mass. In the collapsar model, a rapidly rotating massive star collapses t…
Strong Black Hole Natal Kicks in Magnetized Accretion-Powered Explosions
Sean E. Li, Ore Gottlieb, Brian D. Metzger
Asymmetric stellar explosions impart an impulse, or natal kick, to their compact remnants by linear momentum conservation. Black hole (BH) natal kicks are often assumed to be weake…
Dispersion Measure Variability in Fast Radio Bursts from Photoionization
Brian D. Metzger
Magnetars became favored engines of fast radio bursts (FRBs) following the discovery of a luminous radio burst coincident with a hard X-ray flare from a Galactic magnetar. Several…
GRMHD Simulations of Accreting Proto-Magnetars II. Implications for r-process Nucleosynthesis
Tejas Prasanna, Kyle Parfrey, Brian D. Metzger +3
Newly formed, rapidly spinning, strongly magnetized neutron stars ("millisecond proto-magnetars") can arise in collapsars, neutron star mergers, or white-dwarf accretion-induced co…
GRMHD Simulations of Accreting Proto-Magnetars I. Implications for Gamma-Ray Burst Jets and Energetic Explosions
Tejas Prasanna, Kyle Parfrey, Brian D. Metzger +3
Newly formed, rapidly rotating, strongly magnetized neutron stars ("millisecond proto-magnetars") are promising central engines for gamma-ray bursts (GRBs) and luminous supernovae.…
Relativistic outflows power a quasi-periodic eruption: constraints on energetics, mass loss, and emission mechanisms
Joheen Chakraborty, Erin Kara, Wenbin Lu +17
Quasi-periodic eruptions (QPEs) are recurring bursts of X-ray radiation originating from supermassive black holes (SMBHs). They are an unprecedented type of structured, high-amplit…
Explaining the X-ray Precursor, Ultra-long Prompt Emission, and Week-long Decay of GRB250702B with a Jetted Micro-TDE
Fulya Kıroğlu, Taeho Ryu, Alexander Tchekhovskoy +3
The longest detected gamma-ray burst, GRB250702B, exhibited seven hours of prompt -ray emission, preceded by a soft X-ray precursor ( day earlier) and followed by a weeks…
From Light to Sound: Spectroscopic Evolution & Sonification of the flaring Nova V612 Scuti
Pragati Acharya, Elias Aydi, Kirill V. Sokolovsky +17
We present photometric and spectroscopic observations of the 2017 Galactic nova V612 Sct, whose optical evolution was marked by multiple unusually large maxima. The eruption includ…
Compact Objects Merging with Stars as an Origin of Ultra-Long Gamma-Ray Bursts and Luminous Fast Blue Optical Transients
V. Ashley Villar, Anya E. Nugent, Eric Burns +4
Ultra-long gamma-ray bursts (ULGRBs) and luminous fast blue optical transients (LFBOTs) are two rare classes of engine-driven transients whose physical connection remains unknown.…
A Collapsar-Disk Origin for GW190814
Vishal Baibhav, Brian D. Metzger, Lam Hui
GW190814 was a remarkable gravitational-wave (GW) event: a merger between a 23 solar-mass black hole (BH) and a 2.6 solar-mass compact object, with an extreme mass ratio that is di…
Old and Bright: The Remarkable Radio Brightening of the Engine-driven SN 2012au Several Years After Explosion Signals the Birth of a PWN
Eli Wiston, Raffaella Margutti, A. J. Nayana +23
We present the results from an extensive broad-band (radio to X-rays) observing campaign of the engine-driven Type Ib SN 2012au in the first 13 years of evolution. The early-time (…
On the Gamma-ray Efficiency of Superluminous Supernovae: Potential Detections and Population-Level Constraints
Milena Crnogorčević, Tim Linden, Ariel Goobar +1
Superluminous supernovae (SLSNe) are among the most energetic stellar explosions, yet their central power source remains uncertain. Models invoking magnetar spin-down or circumstel…
A Unified Model for Shock Interaction and -Ray Emission in Classical Novae
Rebecca Diesing, Brian Metzger
We present a parameterized ("toy") model for shock interaction and -ray emission in classical novae, in which a white dwarf envelope of mass is removed over a time…
Neutrino and electromagnetic signatures from Superluminous Supernovae: a case study for SN 2017egm
Mainak Mukhopadhyay, Shigeo S. Kimura, Indrek Vurm +1
Superluminous supernovae (SLSNe) are rare transients that are times more luminous than ordinary stellar explosions, reaching peak optical luminosities $\sim 10^{44}…
Shocks in the Symbiotic Recurrent Nova V3890 Sgr: VLBI Radio Imaging and Fermi GeV Gamma-Rays
Isabella Molina, Peter Craig, Rebecca Diesing +14
We present very long baseline interferometric (VLBI) radio imaging and Fermi/LAT GeV -ray observations of the 2019 eruption of the symbiotic recurrent nova V3890 Sgr.The VLBI im…
The Environments of Luminous Fast Blue Optical Transients: Evidence for a Compact Object and Wolf-Rayet Star Merger Origin
Anya E. Nugent, V. Ashley Villar, Brian D. Metzger +5
We present a comprehensive analysis of the host galaxies of 11 luminous fast blue optical transients (LFBOTs). We model new and archival host photometry and spectroscopy with Prosp…
Ultra Heavy Cosmic Rays from Magnetars
Anirudh Patel, Rebecca Diesing, Brian Metzger
Matter ejected from the neutron star crust during a magnetar giant flare will undergo -process nucleosynthesis during decompression. Ultra heavy ions () can be acceler…
Fast X-ray Transient Detection with AXIS: application to Magnetar Giant Flares
Michela Negro, Zorawar Wadiasingh, George Younes +6
Magnetar giant flares (MGFs) are among the most luminous high-energy transients in the local universe, consisting of a short, intense MeV gamma-ray spike followed by a softer, puls…
Spinning into the Gap: Direct-Horizon Collapse as the Origin of GW231123 from End-to-End GRMHD Simulations
Ore Gottlieb, Brian D. Metzger, Danat Issa +3
GW231123, the most massive binary black hole (BH) merger observed to date, involves component BHs with masses inside the pair-instability mass gap and unusually high spins. This ch…
Heavy element nucleosynthesis in rotating proto-magnetar winds
Tejas Prasanna, Matthew S. B. Coleman, Todd A. Thompson +3
The astrophysical origin of elements synthesized through the rapid neutron capture process (process) is a long standing mystery. The hot and dense environments of core-collapse…
r-Process Nucleosynthesis and Radioactively Powered Transients from Magnetar Giant Flares
Anirudh Patel, Brian D. Metzger, Jared A. Goldberg +3
We present nucleosynthesis and light-curve predictions for a new site of the rapid neutron capture process (-process) from magnetar giant flares (GFs). Motivated by observations…
Direct evidence for r-process nucleosynthesis in delayed MeV emission from the SGR 1806-20 magnetar giant flare
Anirudh Patel, Brian D. Metzger, Jakub Cehula +3
The origin of heavy elements synthesized through the rapid neutron capture process (-process) has been an enduring mystery for over half a century. Cehula et al. (2024) recently…
A Unified Model of Kilonovae and GRBs in Binary Mergers Establishes Neutron Stars as the Central Engines of Short GRBs
Ore Gottlieb, Brian D. Metzger, Francois Foucart +1
We expand the theoretical framework by Gottlieb el al. (2023), which connects binary merger populations with long and short binary gamma-ray bursts (lbGRBs and sbGRBs), incorporati…
Magnetically-Driven Neutron-Rich Ejecta Unleashed: Global 3D Neutrino-General Relativistic Magnetohydrodynamic Simulations of Collapsars Probe the Conditions for r-process Nucleosynthesis
Danat Issa, Ore Gottlieb, Brian Metzger +5
Collapsars - rapidly rotating stellar cores that form black holes - can power gamma-ray bursts (GRBs) and are proposed to be key contributors to the production of heavy elements in…