743 citations · 5.7k across the 86 of their papers we have counts for
89 papers
Stars Would Remember a Recent Gravitational Transition: Testing G-step Resolutions of the Hubble Tension with Red Dwarfs
Jeremy Sakstein, Harry Desmond
We test the hypothesis that Newton's gravitational constant underwent a rapid transition approximately - ago, as proposed in some resolutions of the Hubble tens…
Dark Matter-Induced Stellar Oscillations in the de Broglie Regime
Qiuyue Liang, Jeremy Sakstein
We investigate stellar oscillations driven by the time-dependent gravitational potential of ultralight dark matter (ULDM) in the de Broglie regime. The response is controlled by th…
Axions and the RR Lyrae Period-Luminosity Relation
Jeremy Sakstein, Djuna Croon
We investigate the impact of axions on the period-luminosity relation (PLR) of RR Lyrae stars. During the red giant branch phase, emission through the electron coupling cools the c…
Relativistic Stellar Oscillations from Ultralight Dark Matter
Shanae Oishi, Christopher Reyes, Jeremy Sakstein
Ultra-light dark matter, composed of bosons behaving as classical waves, can resonantly excite stellar oscillations. In this work, we investigate this phenomenon in relativistic st…
The location of the upper edge of the pair-instability supernovae black hole mass gap
Jeremy Sakstein, Djuna Croon
Gravitational wave observations are beginning to probe the upper edge of the pair-instability supernova (PISN) black hole mass gap, a key prediction of stellar evolution. In this w…
Precision constraints on stellar physics from main sequence detached eclipsing binaries
Mitchell T. Dennis, Harry Desmond, Jeremy Sakstein
We present a Bayesian framework to constrain {mass (), metallicity (), stellar age (), and the convective mixing length parameter ()} in main-sequence (MS) de…
Millicharged Particle Constraints from Asymptotic Giant Branch Stars
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +1
We investigate the effect of millicharged particles (MCPs) with electric charge and mass on the late-stage evolution phases of low-mass stars in globular clusters.…
Unifying Early and Late Dark Energy: Dynamical Requirements and Obstructions
William Giarè, Jeremy Sakstein
We investigate whether early- and late-time dark energy could arise from a single scalar field. Adopting a bottom-up perspective, we first identify the sequence of dynamical regime…
Millicharged Particle Production During Late-Stage Stellar Evolution
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +1
Stars are natural sources of feebly interacting particles, including putative particles with mass and electric charge . The emission of such millicharged particles (MCPs)…
The Black Hole Mass Gap as a New Probe of Millicharged Particles
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +2
We investigate the impact of millicharged particles (MCPs) on massive stars undergoing pulsational pair-instability supernovae and on the location of the lower edge of the black ho…
The Speed of Gravity and the Fate of Dark Energy
Jeremy Sakstein, Bhuvnesh Jain
On August 17 2017, observatories worldwide made a landmark detection: gravitational waves and light from a binary neutron star merger. This event revolutionized our unde…
Dark matter silences Cepheids in the Galactic Center
Djuna Croon, Tim Linden, Jeremy Sakstein
Upcoming near-infrared facilities (e.g. JWST/NIRCam, ELT/MICADO) will dramatically increase the detectability of galactic center Cepheids despite extreme extinction at optical wave…
Can GW231123 have a stellar origin?
Djuna Croon, Davide Gerosa, Jeremy Sakstein
The gravitational wave event GW231123 detected by the LIGO interferometers during their fourth observing run features two black holes with source-frame masses of $137^{+23}_{-18} M…
Slowly Rotating Neutron Stars in Aether Scalar-Tensor Theory
Christopher Reyes, Jeremy Sakstein
Aether Scalar-Tensor theory is a relativistic alternative gravity model that behaves like cold dark matter on cosmological scales while predicting the MOND force-law in astrophysic…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Cosmology and Astrophysics of CP-Violating Axions
Omar F. Ramadan, Jeremy Sakstein, Djuna Croon
We study the cosmology and astrophysics of axion-like particles (ALPs) with CP-violating Yukawa couplings to nucleons. At finite nucleon density, the ALP's dynamics is governed by…
Dark Dwarfs: Dark Matter-Powered Sub-Stellar Objects Awaiting Discovery at the Galactic Center
Djuna Croon, Jeremy Sakstein, Juri Smirnov +1
We investigate the effects of dark matter annihilation on objects with masses close to the sub-stellar limit, finding that the minimum mass for stable hydrogen burning is larger th…
Multi-Generational Black Hole Population Analysis with an Astrophysically Informed Mass Function
Yannick Ulrich, Djuna Croon, Jeremy Sakstein +1
We analyze the population statistics of black holes in the LIGO/Virgo/KAGRA GWTC-3 catalog using a parametric mass function derived from simulations of massive stars experiencing p…
Neutron Stars in Aether Scalar-Tensor Theory
Christopher Reyes, Jeremy Sakstein
Aether Scalar-Tensor theory is a modification of general relativity proposed to explain galactic and cosmological mass discrepancies conventionally attributed to dark matter.~The t…
First Constraints on a Pixelated Universe in Light of DESI
Jonathan J. Heckman, Omar F. Ramadan, Jeremy Sakstein
Pixelated dark energy is a string theory scenario with a quantum mechanically stable cosmological constant. The number of pixels that make up the universe slowly increases, manifes…
DESI Constraints on Exponential Quintessence
Omar F. Ramadan, Jeremy Sakstein, David Rubin
The DESI collaboration have recently analyzed their first year of data, finding a preference for thawing dark energy scenarios when using parameterized equations of state for dark…
Parameterized Post-Tolman-Oppenheimer-Volkoff Framework for Screened Modified Gravity with an Application to the Secondary Component of GW190814
Christopher Reyes, Jeremy Sakstein
The secondary component of GW190814 has mass in the range --, placing it within the lower mass gap separating neutron stars from black holes. According to t…
Prediction of Multiple Features in the Black Hole Mass Function due to Pulsational Pair-Instability Supernovae
Djuna Croon, Jeremy Sakstein
Using high-resolution simulations of black hole formation from the direct collapse of massive stars undergoing pulsational pair-instability supernovae (PPISN), we find a new phenom…
Dark Matter Annihilation and Pair-Instability Supernovae
Djuna Croon, Jeremy Sakstein
We study the evolution of heavy stars () undergoing pair-instability in the presence of annihilating dark matter. Focusing on the scenario where the dark matte…