LISA Definition Study Report

Kavli Affiliate: David Shoemaker | First 5 Authors: Monica Colpi, Karsten Danzmann, Martin Hewitson, Kelly Holley-Bockelmann, Philippe Jetzer | Summary: The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves in the 0.1 mHz to 1 Hz frequency […]


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The PFS view of TOI-677 b: A spin-orbit aligned warm Jupiter in a dynamically hot system

Kavli Affiliate: Avi Shporer | First 5 Authors: Qingru Hu, Malena Rice, Xian-Yu Wang, Songhu Wang, Avi Shporer | Summary: TOI-677 b is part of an emerging class of “tidally-detached” gas giants ($a/R_star gtrsim 11$) that exhibit large orbital eccentricities and yet low stellar obliquities. Such sources pose a challenge for models of giant planet […]


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The TESS-Keck Survey. XVIII. A sub-Neptune and spurious long-period signal in the TOI-1751 system

Kavli Affiliate: Alan M. Levine | First 5 Authors: Anmol Desai, Emma V. Turtelboom, Caleb K. Harada, Courtney D. Dressing, David R. Rice | Summary: We present and confirm TOI-1751 b, a transiting sub-Neptune orbiting a slightly evolved, solar-type, metal-poor star ($T_{eff} = 5996 pm 110$ K, $log(g) = 4.2 pm 0.1$, V = 9.3 […]


Continue.. The TESS-Keck Survey. XVIII. A sub-Neptune and spurious long-period signal in the TOI-1751 system

A Strontium-rich Ultra Metal-poor Star in the Atari Disk Component

Kavli Affiliate: Anna Frebel | First 5 Authors: Mohammad K. Mardini, Anna Frebel, Anirudh Chiti, , | Summary: We report on the discovery of the first ultra metal-poor (UMP) star 2MASS~J20500194$-$6613298 (J2050$-$6613; mbox{[Fe/H] = $-4.05$}) selected from the Gaia BP/RP spectral catalog that belongs to the ancient Atari disk component. We obtained a high-resolution spectrum […]


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GenEFT: Understanding Statics and Dynamics of Model Generalization via Effective Theory

Kavli Affiliate: Max Tegmark | First 5 Authors: David D. Baek, Ziming Liu, Max Tegmark, , | Summary: We present GenEFT: an effective theory framework for shedding light on the statics and dynamics of neural network generalization, and illustrate it with graph learning examples. We first investigate the generalization phase transition as data size increases, […]


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GenEFT: Understanding Statics and Dynamics of Model Generalization via Effective Theory

Kavli Affiliate: Max Tegmark | First 5 Authors: David D. Baek, Ziming Liu, Max Tegmark, , | Summary: We present GenEFT: an effective theory framework for shedding light on the statics and dynamics of neural network generalization, and illustrate it with graph learning examples. We first investigate the generalization phase transition as data size increases, […]


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Opening the AI black box: program synthesis via mechanistic interpretability

Kavli Affiliate: Max Tegmark | First 5 Authors: Eric J. Michaud, Isaac Liao, Vedang Lad, Ziming Liu, Anish Mudide | Summary: We present MIPS, a novel method for program synthesis based on automated mechanistic interpretability of neural networks trained to perform the desired task, auto-distilling the learned algorithm into Python code. We test MIPS on […]


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Introducing the BRAHMA simulation suite: Signatures of low mass black hole seeding models in cosmological simulations

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Aklant K. Bhowmick, Laura Blecha, Paul Torrey, Luke Zoltan Kelley, Rainer Weinberger | Summary: The first "seeds" of supermassive black holes (BH) can range from $sim10^2-10^6~M_{odot}$. However, the lowest mass seeds ($lesssim10^3 M_{odot}$) are inaccessible to most cosmological simulations due to resolution limitations. We present our new […]


Continue.. Introducing the BRAHMA simulation suite: Signatures of low mass black hole seeding models in cosmological simulations

Introducing the BRAHMA simulation suite: Signatures of low mass black hole seeding models in cosmological simulations

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Aklant K. Bhowmick, Laura Blecha, Paul Torrey, Luke Zoltan Kelley, Rainer Weinberger | Summary: The first "seeds" of supermassive black holes (BH) can range from $sim10^2-10^6~M_{odot}$. However, the lowest mass seeds ($lesssim10^3 M_{odot}$) are inaccessible to most cosmological simulations due to resolution limitations. We present our new […]


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The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn Mass Planet and a non-Transiting Saturn Mass Planet Orbiting a Solar Analog

Kavli Affiliate: George R. Ricker | First 5 Authors: Michelle L. Hill, Stephen R. Kane, Paul A. Dalba, Mason MacDougall, Tara Fetherolf | Summary: The Transiting Exoplanet Survey Satellite (TESS) continues to dramatically increase the number of known transiting exoplanets, and is optimal for monitoring bright stars amenable to radial velocity (RV) and atmospheric follow-up […]


Continue.. The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn Mass Planet and a non-Transiting Saturn Mass Planet Orbiting a Solar Analog