Astrophysics – Page 450 – Kavli Institute Pre-Print Publications

SRGA J181414.6-225604: A new Galactic symbiotic X-ray binary outburst triggered by an intense mass loss episode of a heavily obscured Mira variable

Posted by klaurent May 18, 2022MIT

Kavli Affiliate: Robert Simcoe | First 5 Authors: Kishalay De, Ilya Mereminskiy, Roberto Soria, Charlie Conroy, Erin Kara | Summary: We present the discovery and multi-wavelength characterization of SRGA J181414.6-225604, a Galactic hard X-ray transient discovered during the ongoing SRG/ART-XC sky survey. Using data from the Palomar Gattini-IR survey, we identify a spatially and temporally […]

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The Robotic Multi-Object Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)

Posted by dbos May 18, 2022Stanford

Kavli Affiliate: Kevin Reil | First 5 Authors: Joseph Harry Silber, Parker Fagrelius, Kevin Fanning, Michael Schubnell, Jessica Nicole Aguilar | Summary: A system of 5,020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at Kitt Peak National Observatory. The robots automatically re-target their optical fibers every 10 – 20 minutes, each […]

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The Robotic Multi-Object Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)

Posted by dbos May 18, 2022Stanford

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Polarized x-rays from a magnetar

Posted by klaurent May 18, 2022MIT

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Roberto Taverna, Roberto Turolla, Fabio Muleri, Jeremy Heyl, Silvia Zane | Summary: We report on the first detection of linearly polarized x-ray emission from an ultra-magnetized neutron star with the Imaging X-ray Polarimetry Explorer (IXPE). The IXPE 35 observations of the anomalous x-ray pulsar 4U 0142+61 […]

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Sampling with replacement vs Poisson sampling: a comparative study in optimal subsampling

Posted by klaurent May 17, 2022May 31, 2022Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Jiahui Zou, HaiYing Wang, , | Summary: Faced with massive data, subsampling is a commonly used technique to improve computational efficiency, and using nonuniform subsampling probabilities is an effective approach to improve estimation efficiency. For computational efficiency, subsampling is often implemented with replacement or through […]

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The Physics potential of the CEPC. Prepared for the US Snowmass Community Planning Exercise (Snowmass 2021)

Posted by klaurent May 17, 2022Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Huajie Cheng, Wen Han Chiu, Yaquan Fang, Yu Gao, Jiayin Gu | Summary: The Circular Electron Positron Collider (CEPC) is a large-scale collider facility that can serve as a factory of the Higgs, Z, and W bosons and is upgradable to run at the ttbar threshold. This […]

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The Physics potential of the CEPC. Prepared for the US Snowmass Community Planning Exercise (Snowmass 2021)

Posted by dbos May 17, 2022Tokyo

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Avoiding a Cluster Catastrophe: Retention Efficiency and the Binary Black Hole Mass Spectrum

Posted by klaurent May 17, 2022May 31, 2022Chicago

Kavli Affiliate: Daniel E. Holz | First 5 Authors: Michael Zevin, Daniel E. Holz, , , | Summary: The population of binary black hole mergers identified through gravitational waves has uncovered unexpected features in the intrinsic properties of black holes in the Universe. One particularly surprising and exciting result is the possible existence of black […]

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Avoiding a Cluster Catastrophe: Retention Efficiency and the Binary Black Hole Mass Spectrum

Posted by May 17, 2022Chicago

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Distances to Local Group Galaxies via Population II, Stellar Distance Indicators I: The Sculptor Dwarf Spheroidal

Posted by klaurent May 17, 2022May 31, 2022Chicago

Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Quang H. Tran, Taylor J. Hoyt, Wendy L. Freedman, Barry F. Madore, Elias K. Oakes | Summary: We determine the distance to the Sculptor Dwarf Spheroidal via three Population II stellar distance indicators: (a) the Tip of the Red Giant Branch (TRGB), (b) RR Lyrae variables […]

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