Gravitational-wave dark siren cosmology systematics from galaxy weighting

Kavli Affiliate: Daniel E. Holz | First 5 Authors: Alexandra G. Hanselman, Aditya Vijaykumar, Maya Fishbach, Daniel E. Holz, | Summary: The discovery of GW170817 provided the first direct gravitational-wave measurement of the Hubble constant, $H_0$, demonstrating the potential power of standard-siren cosmology. The dark siren approach can be utilized for gravitational-wave sources in the […]


Continue.. Gravitational-wave dark siren cosmology systematics from galaxy weighting

Constraining possible $γ$-ray burst emission from GW230529 using Swift-BAT and Fermi-GBM

Kavli Affiliate: Lijing Shao | First 5 Authors: Samuele Ronchini, Suman Bala, Joshua Wood, James Delaunay, Simone Dichiara | Summary: GW230529 is the first compact binary coalescence detected by the LIGO-Virgo-KAGRA collaboration with at least one component mass confidently in the lower mass-gap, corresponding to the range 3-5$M_{odot}$. If interpreted as a neutron star-black hole […]


Continue.. Constraining possible $γ$-ray burst emission from GW230529 using Swift-BAT and Fermi-GBM

Wide Binary Orbits are Preferentially Aligned with the Orbits of Small Planets, but Probably Not Hot Jupiters

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Sam Christian, Andrew Vanderburg, Juliette Becker, Adam L. Kraus, Logan Pearce | Summary: Studying the relative orientations of the orbits of exoplanets and wide-orbiting binary companions (semimajor axis greater than 100 AU) can shed light on how planets form and evolve in binary systems. Previous observations by […]


Continue.. Wide Binary Orbits are Preferentially Aligned with the Orbits of Small Planets, but Probably Not Hot Jupiters

Supermassive black hole formation from Affleck-Dine mechanism with suppressed clustering on large scales

Kavli Affiliate: Masahiro Kawasaki | First 5 Authors: Kentaro Kasai, Masahiro Kawasaki, Kai Murai, Shunsuke Neda, | Summary: We study a primordial black hole (PBH) formation model based on the framework of the inhomogeneous Affleck-Dine (AD) mechanism, which can explain the seeds of supermassive black holes (SMBHs). This model, however, predicts strong clustering of SMBHs […]


Continue.. Supermassive black hole formation from Affleck-Dine mechanism with suppressed clustering on large scales

Constraints on the variation of the fine-structure constant at 3<z<10 with JWST emission-line galaxies

Kavli Affiliate: Linhua Jiang | First 5 Authors: Linhua Jiang, Shuqi Fu, Feige Wang, Sarah E. I. Bosman, Zheng Cai | Summary: We present constraints on the spacetime variation of the fine-structure constant $alpha$ at redshifts $3<z<10$ using JWST emission-line galaxies. The galaxy sample consists of 572 high-quality spectra with strong and narrow [O III] […]


Continue.. Constraints on the variation of the fine-structure constant at 3<z<10 with JWST emission-line galaxies

Occurrence Rates of Exosatellites Orbiting 3-30M$_{rm Jup}$ Hosts from 44 Spitzer Light Curves

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Mary Anne Limbach, Johanna M. Vos, Andrew Vanderburg, Fei Dai, | Summary: We conduct a comprehensive search for transiting exomoons and exosatellites within 44 archival Spitzer light curves of 32 substellar worlds with estimated masses ranging between 3-30M$_{rm Jup}$. This sample’s median host mass is 16M$_{rm Jup}$, […]


Continue.. Occurrence Rates of Exosatellites Orbiting 3-30M$_{rm Jup}$ Hosts from 44 Spitzer Light Curves

Studying geometry of the ultraluminous X-ray pulsar Swift J0243.6+6124 using X-ray and optical polarimetry

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Juri Poutanen, Sergey S. Tsygankov, Victor Doroshenko, Sofia V. Forsblom, Peter Jenke | Summary: Discovery of pulsations from a number of ultra-luminous X-ray (ULX) sources proved that accretion onto neutron stars can produce luminosities exceeding the Eddington limit by a couple of orders of magnitude. The […]


Continue.. Studying geometry of the ultraluminous X-ray pulsar Swift J0243.6+6124 using X-ray and optical polarimetry

On the contribution of dwarf galaxies to reionization of the Universe

Kavli Affiliate: Andrey Kravtsov | First 5 Authors: Zewei Wu, Andrey Kravtsov, , , | Summary: We present estimates of the ultraviolet (UV) and Lyman continuum flux density contributed by galaxies of luminosities from $M_{rm UV}approx -25$ to $M_{rm UV}=-4$ at redshifts $5leq zleq 10$ using a galaxy formation model that reproduces properties of local […]


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The oldest stars with low neutron-capture element abundances and origins in ancient dwarf galaxies

Kavli Affiliate: Anna Frebel | First 5 Authors: Hillary Diane Andales, Ananda Santos Figueiredo, Casey Gordon Fienberg, Mohammad K. Mardini, Anna Frebel | Summary: We present a detailed chemical abundance and kinematic analysis of six extremely metal-poor ($-4.2 leq$ [Fe/H] $leq-$2.9) halo stars with very low neutron-capture abundances ([Sr/H] and [Ba/H]) based on high-resolution Magellan/MIKE […]


Continue.. The oldest stars with low neutron-capture element abundances and origins in ancient dwarf galaxies

Localizing Task Information for Improved Model Merging and Compression

Kavli Affiliate: Ke Wang | First 5 Authors: Ke Wang, Nikolaos Dimitriadis, Guillermo Ortiz-Jimenez, François Fleuret, Pascal Frossard | Summary: Model merging and task arithmetic have emerged as promising scalable approaches to merge multiple single-task checkpoints to one multi-task model, but their applicability is reduced by significant performance loss. Previous works have linked these drops […]


Continue.. Localizing Task Information for Improved Model Merging and Compression