Astrophysics – Page 67 – Kavli Institute Pre-Print Publications

TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by TTVs

Posted by dbos July 25, 2024August 5, 2024MIT

Kavli Affiliate: Sara Seager | First 5 Authors: Judith Korth, Priyanka Chaturvedi, Hannu Parviainen, Ilaria Carleo, Michael Endl | Summary: We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2-day orbit located interior to a previously known hot Jupiter, TOI-1408 b ($P=4.42$ d, $M=1.86pm0.02,M_mathrm{Jup}$, $R=2.4pm0.5,R_mathrm{Jup}$) that exhibits grazing transits. The […]

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ACACIAS I: Element abundance labels for 192 stars in the dwarf galaxy NGC 6822

Posted by dbos July 24, 2024August 5, 2024Chicago

Kavli Affiliate: Alexander P. Ji | First 5 Authors: Melissa K. Ness, J. Trevor Mendel, Sven Buder, Adam Wheeler, Alexander P. Ji | Summary: The element abundances of local group galaxies connect enrichment mechanisms to galactic properties and serve to contextualise the Milky Way’s abundance distributions. Individual stellar spectra in nearby galaxies can be extracted […]

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The HalfDome Multi-Survey Cosmological Simulations: N-body Simulations

Posted by dbos July 24, 2024August 5, 2024Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Adrian E. Bayer, Yici Zhong, Zack Li, Joseph DeRose, Yu Feng | Summary: Upcoming cosmological surveys have the potential to reach groundbreaking discoveries on multiple fronts, including the neutrino mass, dark energy, and inflation. Most of the key science goals require the joint analysis of datasets from […]

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Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0toπ^- ell^+ ν_{ell}$ and $B^+toρ^0 ell^+ν_{ell}$ decays

Posted by dbos Tokyo

Kavli Affiliate: T. Higuchi | First 5 Authors: Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov | Summary: We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0topi^- ell^+ nu_{ell}$ and $B^+torho^0 ell^+nu_{ell}$, where $ell = e, mu$. This measurement uses a data sample of 387 […]

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Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0toπ^- ell^+ ν_{ell}$ and $B^+toρ^0 ell^+ν_{ell}$ decays

Posted by dbos Tokyo

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Population-level Dark Energy Constraints from Strong Gravitational Lensing using Simulation-Based Inference

Posted by dbos July 24, 2024August 5, 2024Chicago

Kavli Affiliate: Brian Nord | First 5 Authors: Sreevani Jarugula, Brian Nord, Abhijith Gandrakota, Aleksandra Ćiprijanović, | Summary: In this work, we present a scalable approach for inferring the dark energy equation-of-state parameter ($w$) from a population of strong gravitational lens images using Simulation-Based Inference (SBI). Strong gravitational lensing offers crucial insights into cosmology, but […]

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Towards efficient machine-learning-based reduction of the cosmic-ray induced background in X-ray imaging detectors: increasing context awareness

Posted by dbos July 23, 2024Stanford

Kavli Affiliate: Sven Herrmann | First 5 Authors: Artem Poliszczuk, Dan Wilkins, Steven W. Allen, Eric D. Miller, Tanmoy Chattopadhyay | Summary: Traditional cosmic ray filtering algorithms used in X-ray imaging detectors aboard space telescopes perform event reconstruction based on the properties of activated pixels above a certain energy threshold, within 3×3 or 5×5 pixel […]

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Towards efficient machine-learning-based reduction of the cosmic-ray induced background in X-ray imaging detectors: increasing context awareness

Posted by dbos July 23, 2024Stanford

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Towards efficient machine-learning-based reduction of the cosmic-ray induced background in X-ray imaging detectors: increasing context awareness

Posted by dbos July 23, 2024MIT

Kavli Affiliate: Eric D. Miller | First 5 Authors: Artem Poliszczuk, Dan Wilkins, Steven W. Allen, Eric D. Miller, Tanmoy Chattopadhyay | Summary: Traditional cosmic ray filtering algorithms used in X-ray imaging detectors aboard space telescopes perform event reconstruction based on the properties of activated pixels above a certain energy threshold, within 3×3 or 5×5 […]

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Towards efficient machine-learning-based reduction of the cosmic-ray induced background in X-ray imaging detectors: increasing context awareness

Posted by dbos July 23, 2024MIT

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Artem Poliszczuk, Dan Wilkins, Steven W. Allen, Eric D. Miller, Tanmoy Chattopadhyay | Summary: Traditional cosmic ray filtering algorithms used in X-ray imaging detectors aboard space telescopes perform event reconstruction based on the properties of activated pixels above a certain energy threshold, within 3×3 or 5×5 […]

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