Astrophysics – Page 14 – Kavli Institute Pre-Print Publications

The Blending ToolKit: A simulation framework for evaluation of galaxy detection and deblending

Posted by dbos September 11, 2024September 23, 2024Stanford

Kavli Affiliate: Patricia Burchat | First 5 Authors: Ismael Mendoza, Andrii Torchylo, Thomas Sainrat, Axel Guinot, Alexandre Boucaud | Summary: We present an open source Python library for simulating overlapping (i.e., blended) images of galaxies and performing self-consistent comparisons of detection and deblending algorithms based on a suite of metrics. The package, named Blending Toolkit […]

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The Blending ToolKit: A simulation framework for evaluation of galaxy detection and deblending

Posted by dbos September 11, 2024Stanford

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POEMMA-Balloon with Radio: a balloon-born multi-messenger multi-detector observatory

Posted by dbos September 10, 2024September 23, 2024Chicago

Kavli Affiliate: Angela Olinto | First 5 Authors: Matteo Battisti, Johannes Eser, Angela Olinto, Giuseppe Osteria, | Summary: The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is a proposed dual-satellite mission to observe Ultra-High-Energy Cosmic Rays (UHECRs), increasing the statistics at the highest energies, and Very-High-Energy Neutrinos (VHENs), following multi-messenger alerts of astrophysical transient events throughout […]

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S-dual of Hamiltonian $mathbf G$ spaces and relative Langlands duality

Posted by dbos September 10, 2024September 23, 2024Tokyo

Kavli Affiliate: Hiraku Nakajima | First 5 Authors: Hiraku Nakajima, , , , | Summary: The S-dual $(mathbf G^veecurvearrowrightmathbf M^vee)$ of the pair $(mathbf Gcurvearrowrightmathbf M)$ of a smooth affine algebraic symplectic manifold $mathbf M$ with hamiltonian action of a complex reductive group $mathbf G$ was introduced implicitly in [arXiv:1706.02112] and explicitly in [arXiv:1807.09038] under […]

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No Redshift Evolution in the Fe II/Mg II Flux Ratios of Quasars across Cosmic Time

Posted by dbos September 10, 2024September 23, 2024Peking

Kavli Affiliate: Linhua Jiang | First 5 Authors: Danyang Jiang, Masafusa Onoue, Linhua Jiang, Samuel Lai, Eduardo Banados | Summary: The Fe II/Mg II emission line flux ratio in quasar spectra serves as a proxy for the relative Fe to alpha-element abundances in the broad line regions of quasars. Due to the expected different enrichment […]

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X-ray spectral performance of the Sony IMX290 CMOS sensor near Fano limit after a per-pixel gain calibration

Posted by dbos September 9, 2024September 23, 2024MIT

Kavli Affiliate: Eric D. Miller | First 5 Authors: Benjamin Schneider, Gregory Prigozhin, Richard F. Foster, Marshall W. Bautz, Hope Fu | Summary: The advent of back-illuminated complementary metal-oxide-semiconductor (CMOS) sensors and their well-known advantages over charge-coupled devices (CCDs) make them an attractive technology for future X-ray missions. However, numerous challenges remain, including improving their […]

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X-ray spectral performance of the Sony IMX290 CMOS sensor near Fano limit after a per-pixel gain calibration

Posted by dbos September 9, 2024MIT

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Benjamin Schneider, Gregory Prigozhin, Richard F. Foster, Marshall W. Bautz, Hope Fu | Summary: The advent of back-illuminated complementary metal-oxide-semiconductor (CMOS) sensors and their well-known advantages over charge-coupled devices (CCDs) make them an attractive technology for future X-ray missions. However, numerous challenges remain, including improving their […]

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X-ray spectral performance of the Sony IMX290 CMOS sensor near Fano limit after a per-pixel gain calibration

Posted by dbos September 9, 2024MIT

Kavli Affiliate: Gregory Prigozhin | First 5 Authors: Benjamin Schneider, Gregory Prigozhin, Richard F. Foster, Marshall W. Bautz, Hope Fu | Summary: The advent of back-illuminated complementary metal-oxide-semiconductor (CMOS) sensors and their well-known advantages over charge-coupled devices (CCDs) make them an attractive technology for future X-ray missions. However, numerous challenges remain, including improving their depletion […]

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Hitting the mark: Optimising Marked Power Spectra for Cosmology

Posted by dbos September 9, 2024September 23, 2024Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Jessica A. Cowell, David Alonso, Jia Liu, , | Summary: Marked power spectra provide a computationally efficient way to extract non-Gaussian information from the matter density field using the usual analysis tools developed for the power spectrum without the need for explicit calculation of higher-order correlators. In […]

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Two Channels of Metal-Rich Compact Stellar System Formation: Starbursts Under High Ram Pressure vs. Tidal Stripping

Posted by dbos September 8, 2024Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Yuan Bian, Min Du, Victor P. Debattista, Dylan Nelson, Mark A. Norris | Summary: Most galaxies follow well-defined scaling relations of metallicity and stellar mass; however, some outliers at the low mass end of the observed galaxy population exhibit unusually high metallicity for their mass. Understanding […]

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