DESI dark secrets

Kavli Affiliate: Michael S. Turner | First 5 Authors: Matilde Lopes Abreu, Michael S. Turner, , , | Summary: The first year results of DESI provide evidence that dark energy may not be quantum vacuum energy ($Lambda$). If true, this would be an extraordinary development in the 25-year quest to understand cosmic acceleration. The best-fit […]


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Evolving dark energy models: Current and forecast constraints

Kavli Affiliate: Joshua A. Frieman | First 5 Authors: Anowar J. Shajib, Joshua A. Frieman, , , | Summary: Recent results from Type Ia supernovae (SNe Ia) and baryon acoustic oscillations (BAO), in combination with cosmic microwave background (CMB) measurements, have focused renewed attention on dark energy models with a time-varying equation-of-state parameter, $w(z)$. In […]


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Measurement of $B^+toτ^+ν_τ$ branching fraction with a hadronic tagging method at Belle II

Kavli Affiliate: T. Higuchi | First 5 Authors: Belle II Collaboration, I. Adachi, K. Adamczyk, H. Ahmed, Y. Ahn | Summary: We present a measurement of the branching fraction of $B^+totau^+nu_tau$ decays using $(387pm6)times 10^6$ $Upsilon(4S)$ collected between 2019 and 2022 with the Belle II detector at the SuperKEKB $e^+e^-$ collider. We reconstruct the accompanying […]


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Broadband $γ$-ray spectrum of supernova remnant Cassiopeia A

Kavli Affiliate: Li Xin Li | First 5 Authors: Zhen Cao, F. Aharonian, Y. X. Bai, Y. W. Bao, D. Bastieri | Summary: The core-collapse supernova remnant (SNR) Cassiopeia A (Cas A) is one of the brightest galactic radio sources with an angular radius of $sim$ 2.5 $arcmin$. Although no extension of this source has […]


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Momentum and Matter Matter for Axion Dark Matter Matters on Earth

Kavli Affiliate: Yevgeny V. Stadnik | First 5 Authors: Abhishek Banerjee, Itay M. Bloch, Quentin Bonnefoy, Sebastian A. R. Ellis, Gilad Perez | Summary: We investigate the implications of matter effects to searches for axion Dark Matter on Earth. The finite momentum of axion Dark Matter is crucial to elucidating the effects of Earth on […]


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CMB-S4: Foreground-Cleaning Pipeline Comparison for Measuring Primordial Gravitational Waves

Kavli Affiliate: Zeeshan Ahmed | First 5 Authors: Federico Bianchini, Dominic Beck, W. L. Kimmy Wu, Zeeshan Ahmed, Sebastian Belkner | Summary: We compare multiple foreground-cleaning pipelines for estimating the tensor-to-scalar ratio, $r$, using simulated maps of the planned CMB-S4 experiment within the context of the South Pole Deep Patch. To evaluate robustness, we analyze […]


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Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at low redshift

Kavli Affiliate: Linhua Jiang | First 5 Authors: Zhiwei Pan, Linhua Jiang, Wei-Jian Guo, Shengxiu Sun, Małgorzata Siudek | Summary: We present a study on the possible overestimation of single-epoch supermassive black hole (SMBH) masses in previous works, based on more than 55,000 type 1 quasars at $0.25 < z < 0.8$ from the Dark […]


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Ruling out AGNs as the dominant source of cosmic reionization with JWST

Kavli Affiliate: Linhua Jiang | First 5 Authors: Danyang Jiang, Linhua Jiang, Shengxiu Sun, Weiyang Liu, Shuqi Fu | Summary: Cosmic reionization represents the latest phase transition of the intergalactic medium (IGM) in the Universe. It has long been debated whether galaxies or active galactic nuclei (AGNs) are the major source of Lyman continuum (LyC) […]


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Probing intermediate-mass black hole binaries with the Lunar Gravitational-wave Antenna

Kavli Affiliate: Xian Chen | First 5 Authors: Hanlin Song, Han Yan, Yacheng Kang, Xian Chen, Junjie Zhao | Summary: New concepts for observing the gravitational waves (GWs) using a detector on the Moon, such as the Lunar Gravitational-wave Antenna (LGWA), have gained increasing attention. By utilizing the Moon as a giant antenna, the LGWA […]


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Propagation-induced Frequency-dependent Polarization Properties of Fast Radio Burst

Kavli Affiliate: Renxin Xu | First 5 Authors: Wei-Yang Wang, Xiaohui Liu, Dongzi Li, Bing Zhang, Chen-Hui Niu | Summary: Frequency-dependent polarization properties provide crucial insights into the radiation mechanisms and magnetic environments of fast radio bursts (FRBs). We explore an analytical solution of radiative transfer of the polarization properties of FRBs as a strong […]


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