Astrophysics – Page 138 – Kavli Institute Pre-Print Publications

Approximate Analytical Solutions for the Circular Restricted Three-Body Problem Including Non-Hamiltonian Solar Radiation Pressure

Posted by February 12, 2024Chicago

Kavli Affiliate: David W. Miller | First 5 Authors: Hailee Hettrick, David W. Miller, Begum Cannataro, , | Summary: The circular restricted three-body problem (CR3BP) with solar radiation pressure (SRP) has often been analyzed with assumptions made on a spacecraft’s attitude, such that the problem remains Hamiltonian. These assumptions are unsatisfactorily limiting for a starshade […]

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LISA Definition Study Report

Posted by dbos February 12, 2024MIT

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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LISA Definition Study Report

Posted by dbos February 12, 2024MIT

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

Posted by klaurent February 12, 2024MIT

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

Posted by klaurent February 11, 2024MIT

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 […]

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

Posted by klaurent February 10, 2024MIT

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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The AGORA High-resolution Galaxy Simulations Comparison Project IV: Halo and Galaxy Mass Assembly in a Cosmological Zoom-in Simulation at $zle2$

Posted by dbos February 9, 2024Stanford

Kavli Affiliate: Tom Abel | First 5 Authors: Santi Roca-Fàbrega, Ji-hoon Kim, Joel R. Primack, Minyong Jung, Anna Genina | Summary: In this fourth paper from the AGORA Collaboration, we study the evolution down to redshift $z=2$ and below of a set of cosmological zoom-in simulations of a Milky Way mass galaxy by eight of […]

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Ly$α$ emission in galaxies at $zsimeq5-6$: new insight from JWST into the statistical distributions of Ly$α$ properties at the end of reionization

Posted by dbos Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Mengtao Tang, Daniel P. Stark, Richard S. Ellis, Fengwu Sun, Michael Topping | Summary: JWST has recently sparked a new era of Lya spectroscopy, delivering the first measurements of the Lya escape fraction and velocity profile in typical galaxies at z~6-10. These observations offer new prospects for […]

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Ly$α$ emission in galaxies at $zsimeq5-6$: new insight from JWST into the statistical distributions of Ly$α$ properties at the end of reionization

Posted by dbos Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Mengtao Tang, Daniel P. Stark, Richard S. Ellis, Fengwu Sun, Michael Topping | Summary: JWST has recently sparked a new era of Ly$alpha$ spectroscopy, delivering the first measurements of the Ly$alpha$ escape fraction and velocity profile in typical galaxies at $zsimeq6-10$. These observations offer new prospects for […]

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High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam

Posted by dbos February 8, 2024February 20, 2024Peking

Kavli Affiliate: Claudio Ricci | First 5 Authors: Ming-Yang Zhuang, Qian Yang, Yue Shen, Monika Adamow, Douglas N. Friedel | Summary: High-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied extragalactic legacy fields with the Dark Energy Camera (DECam) imager on the CTIO 4m Blanco telescope. Since Feb 2019, […]

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