Chicago – Kavli Institute Pre-Print Publications

Cosmology Constraints from Type Ia Supernova Simulations of the Nancy Grace Roman Space Telescope Strategy Recommended by the High Latitude Time Domain Survey Definition Committee

Posted by dbos June 4, 2025June 9, 2025Chicago, This Week: Astrophysics

Kavli Affiliate: Richard Kessler | First 5 Authors: Richard Kessler, Rebekah Hounsell, Bhavin Joshi, David Rubin, Masao Sako | Summary: Within the next few years, the upcoming Nancy Grace Roman Space Telescope will be gathering data for the High Latitude Time Domain Survey (HLTDS) that will be used to significantly improve the Type Ia supernova […]

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TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Posted by dbos June 3, 2025June 9, 2025Chicago, This Week: Astrophysics

Kavli Affiliate: Joshua A. Frieman | First 5 Authors: Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frederic Courbin, Frederic Dux | Summary: We present cosmological constraints from 8 strongly lensed quasars (hereafter, the TDCOSMO-2025 sample). Building on previous work, our analysis incorporated new deflector stellar velocity dispersions measured from spectra obtained with the James Webb […]

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TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Posted by dbos June 3, 2025June 9, 2025Chicago, This Week: Astrophysics

Kavli Affiliate: Joshua A. Frieman | First 5 Authors: TDCOSMO Collaboration, Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frédéric Courbin | Summary: We present cosmological constraints from 8 strongly lensed quasars (hereafter, the TDCOSMO-2025 sample). Building on previous work, our analysis incorporated new deflector stellar velocity dispersions measured from spectra obtained with the James Webb […]

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Chicago-Carnegie Hubble Program (CCHP) A Multi-Wavelength Search for the Effects of Metallicity on the Cepheid Distance Scale. Part II: Theoretical Models and Synthetic Spectra

Posted by June 1, 2025Chicago

Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Barry F. Madore, Wendy L. Freedman, Kayla Owens, , | Summary: This is the second of two papers exploring the effects of metallicity on the multi-wavelength properties of Cepheids in terms of their multi-wavelength period-luminosity (PL) relations, impacting their use as extragalactic distance indicators, underpinning one […]

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robostrategy: Field and Target Assignment Optimization in the Sloan Digital Sky Survey V

Posted by dbos May 27, 2025June 2, 2025Chicago

Kavli Affiliate: Alexander Ji | First 5 Authors: Michael R. Blanton, Joleen K. Carlberg, Tom Dwelly, Ilija Medan, S. Drew Chojnowski | Summary: We present an algorithmic method for efficiently planning a long-term, large-scale multi-object spectroscopy program. The Sloan Digital Sky Survey V (SDSS-V) Focal Plane System performs multi-object spectroscopy using 500 robotic positioners to […]

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The Extreme Universe Observatory on a Super-Pressure Balloon II: Mission, Payload, and Flight

Posted by dbos May 27, 2025June 2, 2025Chicago

Kavli Affiliate: Stephan S. Meyer | First 5 Authors: James. H. Adams Jr., Denis Allard, Phillip Alldredge, Luis Anchordoqui, Anna Anzalone | Summary: The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) is a pathfinder mission toward a space-based observatory such as the Probe of Extreme Multi-Messenger Astrophysics (POEMMA). The aim of […]

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Sequential Interval Passing for Compressed Sensing

Posted by dbos May 20, 2025June 2, 2025Chicago

Kavli Affiliate: Salman Habib | First 5 Authors: Salman Habib, Remi Chou, Taejoon Kim, , | Summary: The reconstruction of sparse signals from a limited set of measurements poses a significant challenge as it necessitates a solution to an underdetermined system of linear equations. Compressed sensing (CS) deals with sparse signal reconstruction using techniques such […]

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Connecting JWST discovered N/O-enhanced galaxies to globular clusters: Evidence from chemical imprints

Posted by May 18, 2025Chicago

Kavli Affiliate: Andrey Kravtsov | First 5 Authors: Xihan Ji, Vasily Belokurov, Roberto Maiolino, Stephanie Monty, Yuki Isobe | Summary: Recent JWST observations have revealed a growing population of galaxies at $z>4$ with elevated nitrogen-to-oxygen ratios. These "N/O-enhanced" galaxies (NOEGs) exhibit near- to super-solar N/O at sub-solar O/H, clearly deviating from the well-established scaling relation […]

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Origin of the ring ellipticity in the black hole images of M87*

Posted by dbos May 15, 2025May 28, 2025Chicago

Kavli Affiliate: John E. Carlstrom | First 5 Authors: Rohan Dahale, Ilje Cho, Kotaro Moriyama, Kaj Wiik, Paul Tiede | Summary: We investigate the origin of the elliptical ring structure observed in the images of the supermassive black hole M87*, aiming to disentangle contributions from gravitational, astrophysical, and imaging effects. Leveraging the enhanced capabilities of […]

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Origin of the ring ellipticity in the black hole images of M87*

Posted by dbos May 15, 2025May 28, 2025Chicago

Kavli Affiliate: Bradford A. Benson | First 5 Authors: Rohan Dahale, Ilje Cho, Kotaro Moriyama, Kaj Wiik, Paul Tiede | Summary: We investigate the origin of the elliptical ring structure observed in the images of the supermassive black hole M87*, aiming to disentangle contributions from gravitational, astrophysical, and imaging effects. Leveraging the enhanced capabilities of […]

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