Astrophysics – Page 396 – Kavli Institute Pre-Print Publications

The SZ flux-mass ($Y$-$M$) relation at low halo masses: improvements with symbolic regression and strong constraints on baryonic feedback

Posted by klaurent September 5, 2022September 19, 2022Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Digvijay Wadekar, Leander Thiele, J. Colin Hill, Shivam Pandey, Francisco Villaescusa-Navarro | Summary: Ionized gas in the halo circumgalactic medium leaves an imprint on the cosmic microwave background via the thermal Sunyaev-Zeldovich (tSZ) effect. Feedback from active galactic nuclei (AGN) and supernovae can affect the measurements […]

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The SZ flux-mass ($Y$-$M$) relation at low halo masses: improvements with symbolic regression and strong constraints on baryonic feedback

Posted by klaurent September 5, 2022Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Digvijay Wadekar, Leander Thiele, J. Colin Hill, Shivam Pandey, Francisco Villaescusa-Navarro | Summary: Feedback from active galactic nuclei (AGN) and supernovae can affect measurements of integrated SZ flux of halos ($Y_mathrm{SZ}$) from CMB surveys, and cause its relation with the halo mass ($Y_mathrm{SZ}-M$) to deviate from […]

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Quantum interference in gravitational particle production

Posted by klaurent September 5, 2022September 19, 2022Chicago

Kavli Affiliate: Edward W. Kolb | First 5 Authors: Edward Basso, Daniel J. H. Chung, Edward W. Kolb, Andrew J. Long, | Summary: Previous numerical investigations of gravitational particle production during the coherent oscillation period of inflation displayed unexplained fluctuations in the spectral density of the produced particles. We argue that these features are due […]

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DeUEDroid: Detecting Underground Economy Apps Based on UTG Similarity

Posted by dbos September 3, 2022Peking

Kavli Affiliate: Ke Wang | First 5 Authors: Zhuo Chen, Jie Liu, Yubo Hu, Lei Wu, Yajin Zhou | Summary: In recent years, the underground economy is proliferating in the mobile system. These underground economy apps (UEware) make profits from providing non-compliant services, especially in sensitive areas such as gambling, pornography, and loans. Unlike traditional […]

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The Cosmic Ultraviolet Baryon Survey (CUBS) V: On the Thermodynamic Properties of the Cool Circumgalactic Medium at $z < 1$

Posted by klaurent September 2, 2022MIT

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Zhijie Qu, Hsiao-Wen Chen, Gwen C. Rudie, Fakhri S. Zahedy, Sean D. Johnson | Summary: This paper presents a systematic study of the photoionization and thermodynamic properties of the cool circumgalactic medium (CGM) as traced by rest-frame ultraviolet absorption lines around 26 galaxies at redshift $zlesssim1$. […]

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The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b

Posted by dbos September 1, 2022Stanford

Kavli Affiliate: Bruce Macintosh | First 5 Authors: Brittany E. Miles, Beth A. Biller, Polychronis Patapis, Kadin Worthen, Emily Rickman | Summary: We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a $<$20 M$_mathrm{Jup}$ widely separated ($sim$8arcsec, a = 150 au), young, planetary-mass companion that shares photometric colors […]

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Tolerance Analysis of Octave Bandwidth Millimeter-Wave Planar Orthomode Transducer

Posted by klaurent September 1, 2022September 12, 2022Chicago

Kavli Affiliate: Jeffrey J. McMahon | First 5 Authors: Johannes Hubmayr, Jason E. Austermann, James A. Beall, Jake A. Connors, Shannon M. Duff | Summary: Planar Orthomode Transducers (OMTs) are commonly used for polarization measurements at millimeter wavelengths. We present an optical coupling study of an octave bandwidth planar OMT in circular waveguide based on […]

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The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High Contrast Imaging of the Exoplanet HIP 65426 b from 2-16 $μ$m

Posted by klaurent Stanford

Kavli Affiliate: Bruce Macintosh | First 5 Authors: Aarynn L. Carter, Sasha Hinkley, Jens Kammerer, Andrew Skemer, Beth A. Biller | Summary: We present JWST Early Release Science (ERS) coronagraphic observations of the super-Jupiter exoplanet, HIP 65426 b, with the Near-Infrared Camera (NIRCam) from 2-5 $mu$m, and with the Mid-Infrared Instrument (MIRI) from 11-16 $mu$m. […]

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The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High Contrast Imaging of the Exoplanet HIP 65426 b from 2-16 $μ$m

Posted by klaurent Stanford

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CMB lensing with shear-only reconstruction on the full sky

Posted by klaurent August 31, 2022September 12, 2022Cambridge

Kavli Affiliate: Anthony Challinor | First 5 Authors: Frank J. Qu, Anthony Challinor, Blake D. Sherwin, , | Summary: Reconstruction of gravitational lensing effects in the CMB from current and upcoming surveys is still dominated by temperature anisotropies. Extragalactic foregrounds in temperature maps can induce significant biases in the lensing power spectrum obtained with the […]

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