103 citations · 167 across the 20 of their papers we have counts for
20 papers · 1 filter
Double Detonations on a Moving Mesh with : Characterizing Early Reddening in SNe Ia
Dillon Hasenour, Paul Duffell, Abigail Polin
Type Ia supernovae are useful as cosmological distance indicators and are significant sources of chemical enrichment in galaxies, but much about their origins remains uncertain. Th…
AT2018hyz: Predictions for a Sky Projection from a Delayed Off-Axis Jet
Ranadeep Ghosh Dastidar, Paul C Duffell
Initially discovered optically, Tidal Disruption Event (TDE) AT2018hyz was first detected in radio 972 days later. The continued monitoring of the event revealed a late-time (1370-…
High-Resolution Numerical Calculations of GRB Afterglow Plateaus arising from Stratified Ejecta
Paul C. Duffell, Ranadeep Ghosh Dastidar
Since the discovery of plateaus in GRB afterglows by Swift, they have been modeled predominantly by late-time energy injection. However, many studies have suggested that the platea…
Exploring the effect of mixing in Low-Luminosity Type IIp Supernovae by modeling SN 2024abfl
Akshith Karri, Abigail Polin, Paul Duffell
Low-luminosity Type IIp supernovae (LLSNe) are SN IIps with peak magnitudes > -15.5 and plateau magnitudes between -13.5 and -15.5 in the V band. SN 2024abfl is an LLSN with a uniq…
Quantifying the impact of relativistic precession on tidal disruption event light curves
Diego Calderón, Ondřej Pejcha, Brian D. Metzger +2
The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impa…
A Novel Parameterization for Rapid Cooling in Supernova Remnants, with applications to the Pa 30 nebula
Miranda Pikus, Paul Duffell, Soham Mandal +1
We systematically study how cooling creates structural changes in supernova remnants as they evolve. Inspired by the peculiar morphology of the Pa 30 nebula, we adopt a framework i…
Optimizing Kilonova Searches: A Case Study of the Type IIb SN 2025ulz in the Localization Volume of the Low-Significance Gravitational Wave Event S250818k
Noah Franz, Bhagya Subrayan, Charles D. Kilpatrick +54
Kilonovae, the ultraviolet/optical/infrared counterparts to binary neutron star mergers, are an exceptionally rare class of transients. Optical follow-up campaigns are plagued by c…
A Late-time Radio Search for Highly Off-axis Jets from PTF Broad-lined Ic Supernovae in GRB-like Host Galaxy Environments
Genevieve Schroeder, Anna Y. Q. Ho, Ranadeep G. Dastidar +3
Hydrogen/Helium-poor stripped-envelope core-collapse supernovae with broad lines (SNe Ic-bl) almost always accompany the nearby () jetted relativistic explosions known as…
A Novel Relationship Between Gamma Ray Burst Duration And Photospheric Radius
Ranadeep Ghosh Dastidar, Paul Duffell
Long Gamma Ray Bursts (lGRBs) are associated with jets in Type Ic broadline supernovae. The Collapsar model provides a theoretical framework for the jet formation from the core col…
EP250108a/SN 2025kg: A Jet-Driven Stellar Explosion Interacting With Circumstellar Material
Gokul P. Srinivasaragavan, Hamid Hamidani, Genevieve Schroeder +28
We present optical, radio, and X-ray observations of EP250108a/SN 2025kg, a broad-line Type Ic supernova (SN Ic-BL) accompanying an Einstein Probe (EP) fast X-ray transient (FXT) a…
The Non-Uniform Expansion of the Crab Nebula
T. Martin, D. Milisavljevic, T. Temim +4
We present extensive proper motion measurements of the Crab Nebula made from Canada-France-Hawaii Telescope MegaPrime/MegaCam images taken in 2007, 2016, and 2019. A total of 19974…
Quantifying Advantages of a Moving Mesh in Nuclear Hydrodynamics
Dillon Hasenour, Paul Duffell
Many astrophysical explosions, such as type Ia supernovae, classical novae, and X-ray bursts, are dominated by thermonuclear runaway. To model these processes accurately, one must…
Could the recent rebrightening of the GW170817A afterglow be caused by a counter jet?
Ranadeep Ghosh Dastidar, Paul Duffell
GRB170817A (also GW170817) became the first binary neutron star (BNS) merger event detected via gravitational waves and electromagnetic signals. Over the next 4 years, various mult…
Measurement of anisotropies in Supernova Remnant observations and their interpretation using numerical models
Soham Mandal, Paul C. Duffell, Abigail Polin +1
Supernova remnants (SNRs) exhibit varying degrees of anisotropy, which have been extensively modeled using numerical methods. We implement a technique to measure anisotropies in SN…
Fast Methods for Computing Photometric Variability of Eccentric Binaries: Boosting, Lensing, and Variable Accretion
Daniel J. D'Orazio, Paul C. Duffell, Christopher Tiede
We analyze accretion-rate time series for equal-mass binaries in co-planar gaseous disks spanning a continuous range of orbital eccentricities up to 0.8, for both prograde and retr…
Sculpting the Morphology of Supernova Remnant Pa 30 via Efficient Ejecta Cooling
Paul C. Duffell, Abigail Polin, Soham Mandal
We demonstrate in a proof-of-concept numerical hydrodynamics calculation that the narrow radial filamentary structures seen in Pa 30 could be generated through highly efficient coo…
jetsimpy: A Highly Efficient Hydrodynamic Code for Gamma-ray Burst Afterglow
Hao Wang, Ranadeep G. Dastidar, Dimitrios Giannios +1
Gamma-ray burst (GRB) afterglows are emissions from ultrarelativistic blast waves produced by a narrow jet interacting with surrounding matter. Since the first multimessenger obser…
Disk induced binary precession: Implications for dynamics and multi-messenger observations of black hole binaries
Christopher Tiede, Daniel J. D'Orazio, Lorenz Zwick +1
Many studies have recently documented the orbital response of eccentric binaries accreting from thin circumbinary disks, characterizing the change in binary semi-major axis and ecc…
The effect of relativistic precession on light curves of tidal disruption events
Diego Calderón, Ondřej Pejcha, Brian D. Metzger +1
The disruption of a star by the tidal forces of a spinning black hole causes the stellar stream to precess affecting the conditions for triggering the tidal disruption event (TDE).…
Evolution of gas disc-embedded intermediate mass ratio inspirals in the LISA band
A. Derdzinski, D. D'Orazio, P. Duffell +2
Among the potential milliHz gravitational wave (GW) sources for the upcoming space-based interferometer LISA are extreme- or intermediate-mass ratio inspirals (EMRI/IMRIs). These e…