Correcting impedance measurements for background parasitics to characterize circuit components in cryogenic environments

Posted by dbos Stanford, This Week: Astrophysics

Kavli Affiliate: Noah A. Kurinsky | First 5 Authors: Riley J. Carpenter, Jadyn Anczarski, Ivar Rydstrom, Aviv Simchony, Zoe J. Smith | Summary: Predictable circuit response is a critical prerequisite for accurate electronic measurements. We describe a powerful, yet straightforward, experimental method and analysis model that utilizes an affordable LCR meter in conjunction with an […]


Continue.. Correcting impedance measurements for background parasitics to characterize circuit components in cryogenic environments

Mitigating Polarization Leakage in Gas Pixel Detectors through Hybrid Machine Learning and Analytic Event Reconstruction

Posted by dbos Stanford, This Week: Astrophysics

Kavli Affiliate: Nicola Omodei | First 5 Authors: Nicoló Cibrario, Michela Negro, Raffaella Bonino, Nikita Moriakov, Luca Baldini | Summary: Spatially resolved polarization measurements of extended X-ray sources are expanding our understanding of the emission mechanisms and magnetic field properties involved. Such measurements have been possible in the past few years thanks to the Imaging […]


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The Atacama Cosmology Telescope: DR6 Power Spectrum Foreground Model and Validation

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Kavli Affiliate: Susan E. Clark | First 5 Authors: Benjamin Beringue, Kristen M. Surrao, J. Colin Hill, Zachary Atkins, Nicholas Battaglia | Summary: We discuss the model of astrophysical emission at millimeter wavelengths used to characterize foregrounds in the multi-frequency power spectra of the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6), expanding on Louis […]


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The QPO in REJ1034+396 originates in the hot corona

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Kavli Affiliate: Steven Allen | First 5 Authors: Chloe Taylor, Daniel Wilkins, Steven Allen, , | Summary: REJ1034+396 is one of the few active galactic nuclei with a significant quasi-periodic oscillation (QPO). The QPO has been observed in over 1 Ms of XMM-Newton observations spanning over a decade. We investigate the power spectral density function […]


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The Roman View of Strong Gravitational Lenses

Posted by dbos Stanford

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: Bryce Wedig, Tansu Daylan, Simon Birrer, Francis-Yan Cyr-Racine, Cora Dvorkin | Summary: Galaxy-galaxy strong gravitational lenses can constrain dark matter models and the Lambda Cold Dark Matter cosmological paradigm at sub-galactic scales. Currently, there is a dearth of images of these rare systems with high signal-to-noise […]


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Revisiting Isocurvature Bounds on the Minimal QCD Axion

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Kavli Affiliate: Peter W. Graham | First 5 Authors: Peter W. Graham, Davide Racco, , , | Summary: The QCD axion has important connections to early universe cosmology. For example, it is often said that isocurvature limits rule out a combination of high axion decay constant, $f_a$, and high inflationary Hubble scale, $H_I$. High scales […]


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Quantum Random Number Generator (QRNG): Theoretical and Experimental Investigations

Posted by dbos Stanford

Kavli Affiliate: Zeeshan Ahmed | First 5 Authors: Zeshan Haider, Muhammad Haroon Saeed, Muhammad Ehsan-ul-Haq Zaheer, Zeeshan Ahmed Alvi, Muhammad Ilyas | Summary: Quantum Random Number Generators (QRNGs) emerged as a promising solution for generating truly random numbers. In the present article, we give an overview of QRNGs highlighting the merits and demerits of various […]


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Millimeter-wave observations of Euclid Deep Field South using the South Pole Telescope: A data release of temperature maps and catalogs

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Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: M. Archipley, A. Hryciuk, L. E. Bleem, K. Kornoelje, M. Klein | Summary: Context. The South Pole Telescope third-generation camera (SPT-3G) has observed over 10,000 square degrees of sky at 95, 150, and 220 GHz (3.3, 2.0, 1.4 mm, respectively) overlapping the ongoing 14,000 square-degree Euclid Wide […]


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Ultra High Energy Cosmic Rays

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Kavli Affiliate: Roger Blandford | First 5 Authors: Noémie Globus, Roger Blandford, , , | Summary: Ultra High Energy Cosmic Rays, UHECR, are charged particles with energies between $sim10^{18},{rm eV}$ and $sim3times10^{20},{rm eV}sim50,{rm J}$. They exhibit fundamental physics at energies inaccessible to terrestrial accelerators, challenge experimental physics and connect strongly to astronomical observations through electromagnetic, […]


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Origin of the X-ray emission in blazars through multiwavelength polarization

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Kavli Affiliate: Roger W. Romani | First 5 Authors: Ioannis Liodakis, Haocheng Zhang, Stella Boula, Riccardo Middei, Jorge Otero-Santos | Summary: The origin of the high-energy emission in astrophysical jets from black holes is a highly debated issue. This is particularly true for jets from supermassive black holes that are among the most powerful particle […]


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