Astrophysics – Page 32 – Kavli Institute Pre-Print Publications

A Labeled Ophthalmic Ultrasound Dataset with Medical Report Generation Based on Cross-modal Deep Learning

Posted by dbos July 26, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Junyan Fan, Meng Zhou, Yanzhu Zhang, Mingyu Shi | Summary: Ultrasound imaging reveals eye morphology and aids in diagnosing and treating eye diseases. However, interpreting diagnostic reports requires specialized physicians. We present a labeled ophthalmic dataset for the precise analysis and the automated exploration of […]

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Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration

Posted by dbos July 26, 2024August 5, 2024Chicago

Kavli Affiliate: Daniel Holz | First 5 Authors: Hannah Middleton, Christopher P L Berry, Nicolas Arnaud, David Blair, Jacqueline Bondell | Summary: The LIGO-Virgo-KAGRA (LVK) Collaboration has made breakthrough discoveries in gravitational-wave astronomy, a new field of astronomy that provides a different means of observing our Universe. Gravitational-wave discoveries are possible thanks to the work […]

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Communicating the gravitational-wave discoveries of the LIGO-Virgo-KAGRA Collaboration

Posted by July 26, 2024Chicago

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Stirring the cosmic pot: how black hole feedback shapes the matter power spectrum in the Fable simulations

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

Kavli Affiliate: Debora Sijacki | First 5 Authors: Sergio Martin-Alvarez, Vid Iršič, Sophie Koudmani, Martin Bourne, Leah Bigwood | Summary: Understanding the impact of baryonic physics on cosmic structure formation is crucial for accurate cosmological predictions, especially as we usher in the era of large galaxy surveys with the Rubin Observatory as well as the […]

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Gravitational wave surrogate model for spinning, intermediate mass ratio binaries based on perturbation theory and numerical relativity

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

Kavli Affiliate: Scott A. Hughes | First 5 Authors: Katie Rink, Ritesh Bachhar, Tousif Islam, Nur E. M. Rifat, Kevin Gonzalez-Quesada | Summary: We present BHPTNRSur2dq1e3, a reduced order surrogate model of gravitational waves emitted from binary black hole (BBH) systems in the comparable to large mass ratio regime with aligned spin ($chi_1$) on the […]

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GJ 238 b: A 0.57 Earth Radius Planet Orbiting an M2.5 Dwarf Star at 15.2 pc

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

Kavli Affiliate: Sara Seager | First 5 Authors: Evan Tey, Avi Shporer, Zifan Lin, Keivan G. Stassun, Jack J. Lissauer | Summary: We report the discovery of the transiting planet GJ 238 b, with a radius of $0.566pm0.014$ R$_{oplus}$ ($1.064pm0.026$ times the radius of Mars) and an orbital period of 1.74 day. The transit signal […]

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UMono: Physical Model Informed Hybrid CNN-Transformer Framework for Underwater Monocular Depth Estimation

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

Kavli Affiliate: Jing Wang | First 5 Authors: Jian Wang, Jing Wang, Shenghui Rong, Bo He, | Summary: Underwater monocular depth estimation serves as the foundation for tasks such as 3D reconstruction of underwater scenes. However, due to the influence of light and medium, the underwater environment undergoes a distinctive imaging process, which presents challenges […]

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UMono: Physical Model Informed Hybrid CNN-Transformer Framework for Underwater Monocular Depth Estimation

Posted by dbos July 25, 2024Peking

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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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