Astrophysics – Page 24 – Kavli Institute Pre-Print Publications

TESS Hunt for Young and Maturing Exoplanets (THYME) XII: A Young Mini-Neptune on the Upper Edge of the Radius Valley in the Hyades Cluster

Posted by dbos October 15, 2024October 28, 2024MIT

Kavli Affiliate: Sara Seager | First 5 Authors: Adam Distler, Melinda Soares-Furtado, Andrew Vanderburg, Jack Schulte, Juliette Becker | Summary: We present the discovery and characterization of TOI-4364,b, a young mini-Neptune in the tidal tails of the Hyades cluster, identified through TESS transit observations and ground-based follow-up photometry. The planet orbits a bright M dwarf […]

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TESS Hunt for Young and Maturing Exoplanets (THYME) XII: A Young Mini-Neptune on the Upper Edge of the Radius Valley in the Hyades Cluster

Posted by dbos October 15, 2024October 28, 2024MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Adam Distler, Melinda Soares-Furtado, Andrew Vanderburg, Jack Schulte, Juliette Becker | Summary: We present the discovery and characterization of TOI-4364,b, a young mini-Neptune in the tidal tails of the Hyades cluster, identified through TESS transit observations and ground-based follow-up photometry. The planet orbits a bright M dwarf […]

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The $R$-process Alliance: Enrichment of $R$-process Elements in a Simulated Milky Way-like Galaxy

Posted by dbos October 15, 2024October 28, 2024MIT

Kavli Affiliate: Anna Frebel | First 5 Authors: Yutaka Hirai, Timothy C. Beers, Young Sun Lee, Shinya Wanajo, Ian U. Roederer | Summary: We study the formation of stars with varying amounts of heavy elements synthesized by the rapid neutron-capture process ($r$-process) based on our detailed cosmological zoom-in simulation of a Milky Way-like galaxy with […]

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TESS Giants Transiting Giants. VII. A Hot Saturn Orbiting an Oscillating Red Giant Star

Posted by dbos October 14, 2024October 28, 2024MIT

Kavli Affiliate: Alan M. Levine | First 5 Authors: Nicholas Saunders, Samuel K. Grunblatt, Daniel Huber, J. M. Joel Ong, Kevin C. Schlaufman | Summary: We present the discovery of TOI-7041 b (TIC 201175570 b), a hot Saturn transiting a red giant star with measurable stellar oscillations. We observe solar-like oscillations in TOI-7041 with a […]

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TESS Giants Transiting Giants. VII. A Hot Saturn Orbiting an Oscillating Red Giant Star

Posted by dbos October 14, 2024MIT

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GA-NIFS & EIGER: A merging quasar host at z=7 with an overmassive black hole

Posted by dbos October 14, 2024Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Madeline A. Marshall, Minghao Yue, Anna-Christina Eilers, Jan Scholtz, Michele Perna | Summary: The James Webb Space Telescope is revolutionising our ability to understand the host galaxies and local environments of high-z quasars. Here we obtain a comprehensive understanding of the host galaxy of the z=7.08 quasar […]

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A systematic search for rapid transients in the Subaru HSC-SSP transient survey

Posted by dbos October 14, 2024October 28, 2024Tokyo

Kavli Affiliate: Naoki Yasuda | First 5 Authors: Seiji Toshikage, Masaomi Tanaka, Naoki Yasuda, Takashi J. Moriya, Ichiro Takahashi | Summary: Recent high-cadence transient surveys have discovered rapid transients whose light curve timescales are shorter than those of typical supernovae. In this paper, we present a systematic search for rapid transients at medium-high redshifts among […]

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Cosmological and Astrophysical Parameter Inference from Stacked Galaxy Cluster Profiles Using CAMELS-zoomGZ

Posted by dbos October 14, 2024October 28, 2024Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Elena Hernández-Martínez, Shy Genel, Francisco Villaescusa-Navarro, Ulrich P. Steinwandel, Max E. Lee | Summary: We present a study on the inference of cosmological and astrophysical parameters using stacked galaxy cluster profiles. Utilizing the CAMELS-zoomGZ simulations, we explore how various cluster properties–such as X-ray surface brightness, gas […]

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The Atacama Cosmology Telescope DR6 and DESI: Structure growth measurements from the cross-correlation of DESI Legacy Imaging galaxies and CMB lensing from ACT DR6 and Planck PR4

Posted by dbos October 14, 2024October 28, 2024Cambridge

Kavli Affiliate: Blake Sherwin | First 5 Authors: Frank J. Qu, Qianjun Hang, Gerrit Farren, Boris Bolliet, Jessica Nicole Aguilar | Summary: We measure the growth of cosmic density fluctuations on large scales and across the redshift range $0.3<z<0.8$ through the cross-correlation of the ACT DR6 CMB lensing map and galaxies from the DESI Legacy […]

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Lens Modeling of STRIDES Strongly Lensed Quasars using Neural Posterior Estimation

Posted by dbos October 14, 2024Stanford

Kavli Affiliate: Aaron Roodman | First 5 Authors: Sydney Erickson, Sebastian Wagner-Carena, Phil Marshall, Martin Millon, Simon Birrer | Summary: Strongly lensed quasars can be used to constrain cosmological parameters through time-delay cosmography. Models of the lens masses are a necessary component of this analysis. To enable time-delay cosmography from a sample of $mathcal{O}(10^3)$ lenses, […]

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