Astrophysics – Page 525 – Kavli Institute Pre-Print Publications

Amplified J-factors in the Galactic Center for velocity-dependent darkmatter annihilation in FIRE simulations

Posted by klaurent November 4, 2021MIT

Kavli Affiliate: Lina Necib | First 5 Authors: Daniel McKeown, James S. Bullock, Francisco J. Mercado, Zachary Hafen, Michael Boylan-Kolchin | Summary: We use FIRE-2 zoom cosmological simulations of Milky Way size galaxy halos to calculate astrophysical J-factors for dark matter annihilation and indirect detection studies. In addition to velocity-independent (s-wave) annihilation cross sections $sigma_v$, […]

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Moderate and $L^p$ maximal inequalities for diffusion processes and conformal martingales

Posted by klaurent November 4, 2021Peking

Kavli Affiliate: Xian Chen | First 5 Authors: Xian Chen, Yong Chen, Mumien Cheng, Chen Jia, | Summary: The $L^p$ maximal inequalities for martingales are one of the classical results in the theory of stochastic processes. Here we establish the sharp moderate maximal inequalities for one-dimensional diffusion processes, which include the $L^p$ maximal inequalities as […]

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Supernova-driven turbulent metal mixing in high redshift galactic disks: metallicity fluctuations in the interstellar medium and its imprints on metal poor stars in the Milky Way

Posted by klaurent November 4, 2021Stanford

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: Anne Noer Kolborg, Davide Martizzi, Enrico Ramirez-Ruiz, Hugo Pfister, Charli Sakari | Summary: The extent to which turbulence mixes gas in the face of recurrent infusions of fresh metals by supernovae (SNe) could help provide important constraints on the local star formation conditions. This includes predictions […]

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K2-79b and K2-222b: Mass measurements of two small exoplanets with periods beyond 10 days that overlap with periodic magnetic activity signals

Posted by klaurent November 4, 2021MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Chantanelle Nava, Mercedes López-Morales, Annelies Mortier, Li Zeng, Helen A. C. Giles | Summary: We present mass and radius measurements of K2-79b and K2-222b, two transiting exoplanets orbiting active G-type stars. Their respective 10.99d and 15.39d orbital periods fall near periods of signals induced by stellar magnetic […]

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Long-Lived Light Mediators from Higgs boson Decay at HL-LHC, FCC-hh and a Proposal of Dedicated LLP Detectors for FCC-hh

Posted by klaurent November 3, 2021Tokyo

Kavli Affiliate: Shigeki Matsumoto | First 5 Authors: Biplob Bhattacherjee, Shigeki Matsumoto, Rhitaja Sengupta, , | Summary: We study the pair production of the long-lived mediator particles from the decay of the SM Higgs boson and their subsequent decay into standard model particles. We compute the projected sensitivity, both model-independently and with a minimal model, […]

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VLA Radio Study of a Sample of Nearby X-ray and Optically Bright Early-Type Galaxies

Posted by klaurent November 3, 2021Stanford

Kavli Affiliate: Steven W. Allen | First 5 Authors: Romana Grossová, Norbert Werner, Francesco Massaro, Kiran Lakhchaura, Tomáš Plšek | Summary: Many massive early-type galaxies host central radio sources and hot X-ray atmospheres indicating the presence of radio-mechanical active galactic nucleus (AGN) feedback. The duty cycle and detailed physics of the radio-mode AGN feedback is […]

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The Simons Observatory: Galactic Science Goals and Forecasts

Posted by klaurent November 3, 2021Stanford

Kavli Affiliate: Susan E. Clark | First 5 Authors: Brandon S. Hensley, Susan E. Clark, Valentina Fanfani, Nicoletta Krachmalnicoff, Giulio Fabbian | Summary: Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised to address many questions in Galactic astrophysics in addition to its […]

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Cosmological inference from the emulator based halo model II: Joint analysis of galaxy-galaxy weak lensing and galaxy clustering from HSC-Y1 and SDSS

Posted by November 3, 2021Tokyo

Kavli Affiliate: Masahiro Takada | First 5 Authors: Hironao Miyatake, Sunao Sugiyama, Masahiro Takada, Takahiro Nishimichi, Masato Shirasaki | Summary: We present high-fidelity cosmology results from a blinded joint analysis of galaxy-galaxy weak lensing ($Delta!Sigma$) and projected galaxy clustering ($w_{rm p}$) measured from the Hyper Suprime-Cam Year-1 (HSC-Y1) data and spectroscopic Sloan Digital Sky Survey […]

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TOI-712: a system of adolescent mini-Neptunes extending to the habitable zone

Posted by klaurent November 3, 2021MIT

Kavli Affiliate: Roland K. Vanderspek | First 5 Authors: Sydney Vach, Samuel N. Quinn, Andrew Vanderburg, Stephen R. Kane, Karen A. Collins | Summary: As an all-sky survey, NASA’s $TESS$ mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolutionary processes that […]

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The THESAN project: predictions for multi-tracer line intensity mapping in the epoch of reionization

Posted by klaurent November 3, 2021MIT

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Rahul Kannan, Aaron Smith, Enrico Garaldi, Xuejian Shen, Mark Vogelsberger | Summary: Line intensity mapping (LIM) is rapidly emerging as a powerful technique to study galaxy formation and cosmology in the high-redshift Universe. We present LIM estimates of select spectral lines originating from the interstellar medium (ISM) […]

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