Astrophysics – Page 488 – Kavli Institute Pre-Print Publications

Probing the properties of superheavy dark matter annihilating or decaying into neutrinos with ultra-high energy neutrino experiments

Posted by klaurent December 9, 2021Chicago

Kavli Affiliate: Angela V. Olinto | First 5 Authors: Claire Guépin, Roberto Aloisio, Luis A. Anchordoqui, Austin Cummings, John F. Krizmanic | Summary: The evidence for dark matter particles, $chi$, is compelling based on Galactic to cosmological scale observations. Thus far, the promising weakly interacting massive particle scenario have eluded detection, motivating alternative models of […]

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Evidence for a Compact Object in the Aftermath of the Extra-Galactic Transient AT2018cow

Posted by klaurent December 8, 2021MIT

Kavli Affiliate: Dheeraj R. Pasham | First 5 Authors: Dheeraj R. Pasham, Wynn C. G. Ho, William Alston, Ronald Remillard, Mason Ng | Summary: The brightest Fast Blue Optical Transients (FBOTs) are mysterious extragalactic explosions that may represent a new class of astrophysical phenomena. Their fast time to maximum brightness of less than a week […]

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Evidence for a Compact Object in the Aftermath of the Extra-Galactic Transient AT2018cow

Posted by klaurent December 8, 2021MIT

Kavli Affiliate: Ronald Remillard | First 5 Authors: Dheeraj R. Pasham, Wynn C. G. Ho, William Alston, Ronald Remillard, Mason Ng | Summary: The brightest Fast Blue Optical Transients (FBOTs) are mysterious extragalactic explosions that may represent a new class of astrophysical phenomena. Their fast time to maximum brightness of less than a week and […]

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Forward-modelling the Luminosity, Distance, and Size distributions of the Milky Way Satellites

Posted by December 8, 2021Chicago

Kavli Affiliate: Andrey Kravtsov | First 5 Authors: Viraj Manwadkar, Andrey Kravtsov, , , | Summary: We use texttt{GRUMPY}, a simple regulator-type model for dwarf galaxy formation and evolution, to forward model dwarf galaxy satellite population of the Milky Way (MW) using the Caterpillar zoom-in simulation suite. We show that luminosity and distance distributions of […]

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Detection of spatial clustering in the 1000 richest SDSS DR8 redMaPPer clusters with Nearest Neighbor distributions

Posted by klaurent December 8, 2021Stanford

Kavli Affiliate: Tom Abel | First 5 Authors: Yunchong Wang, Arka Banerjee, Tom Abel, ., | Summary: Distances to the $k$-nearest-neighbor ($k$NN) data points from volume-filling query points are a sensitive probe of spatial clustering. Here we present the first application of $k$NN summary statistics to observational clustering measurement, using the 1000 richest redMaPPer clusters […]

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The Pantheon+ Analysis: Forward-Modeling the Dust and Intrinsic Colour Distributions of Type Ia Supernovae, and Quantifying their Impact on Cosmological Inferences

Posted by December 8, 2021Chicago

Kavli Affiliate: Richard Kessler | First 5 Authors: Brodie Popovic, Dillon Brout, Richard Kessler, Daniel Scolnic, | Summary: Recent studies have shown that the observed colour distributions of Type Ia SNe (SNIa) are well-described by a combination of distributions from dust and intrinsic colour. Here we present a new forward-modeling fitting method (Dust2Dust) to measure […]

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Shock Revival in Core-collapse Supernovae Assisted by Heavy Axion-like Particles

Posted by klaurent December 7, 2021Tokyo

Kavli Affiliate: Shunsaku Horiuchi | First 5 Authors: Kanji Mori, Tomoya Takiwaki, Kei Kotake, Shunsaku Horiuchi, | Summary: Axion-like particles (ALPs) are a class of hypothetical pseudoscalar particles which feebly interact with ordinary matter. The hot plasma of core-collapse supernovae is a possible laboratory to explore physics beyond the standard model including ALPs. Once produced, […]

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Milli-Hertz Gravitational Wave Background Produced by Quasi-Periodic Eruptions

Posted by klaurent December 6, 2021Peking

Kavli Affiliate: Xian Chen | First 5 Authors: Xian Chen, Yu Qiu, Shuo Li, F. K. Liu, | Summary: Extreme-mass-ratio inspirals (EMRIs) are important targets for future space-borne gravitational-wave (GW) detectors, such as the Laser Interferometer Sapce Antenna (LISA). Recent works suggest that EMRI may reside in a population of newly discovered X-ray transients called […]

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The radio spectral turnover of radio-loud quasars at $z>5$

Posted by klaurent December 6, 2021Peking

Kavli Affiliate: Ran Wang | First 5 Authors: Yali Shao, Jeff Wagg, Ran Wang, Emmanuel Momjian, Chris L. Carilli | Summary: We present Karl G. Jansky Very Large Array (VLA) S- (2–4 GHz), C- (4–8 GHz), and X-band (8–12 GHz) continuum observations toward seven radio-loud quasars at $z>5$. This sample has previously been found to […]

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Illuminating Galaxy Evolution at Cosmic Noon with ISCEA: the Infrared Satellite for Cosmic Evolution Astrophysics

Posted by klaurent December 4, 2021Chicago

Kavli Affiliate: Bradford Benson | First 5 Authors: Yun Wang, Lee Armus, Andrew Benson, Emanuele Daddi, Andreas Faisst | Summary: ISCEA (Infrared Satellite for Cosmic Evolution Astrophysics) is a small astrophysics mission whose Science Goal is to discover how galaxies evolved in the cosmic web of dark matter at cosmic noon. Its Science Objective is […]

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