A model-agnostic likelihood for the reinterpretation of the $boldsymbolB^+to K^+ νbarν$ measurement at Belle II

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: T. Higuchi | First 5 Authors: Belle II Collaboration, Belle II Collaboration, , , | Summary: We recently measured the branching fraction of the $B^+rightarrow K^+nubarnu$ decay using 362 fb$^-1$ of on-resonance $e^+e^-$ collision data, under the assumption of Standard Model kinematics, providing the first evidence for this decay. To facilitate future reinterpretations […]


Continue.. A model-agnostic likelihood for the reinterpretation of the $boldsymbolB^+to K^+ νbarν$ measurement at Belle II

Do Cosmic String Segments Emit Gravitational Waves?

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Satoshi Shirai | First 5 Authors: Akifumi Chitose, Akifumi Chitose, , , | Summary: Cosmic strings are predicted in various extensions of the Standard Model, including grand unified theories. Depending on the symmetry-breaking pattern, they can be either topologically stable or metastable. Intriguingly, metastable strings have been proposed as a possible origin of […]


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First Constraints from Marked Angular Power Spectra with Subaru Hyper Suprime-Cam Survey First-Year Data

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Jessica A. Cowell, Jessica A. Cowell, , , | Summary: We present the first application of marked angular power spectra to weak lensing data, using maps from the Subaru Hyper Suprime-Cam Year 1 (HSC-Y1) survey. Marked convergence fields, constructed by weighting the convergence field with non-linear functions […]


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Hidden diffeos in the Hamiltonian formulation of a background independent field theory

Posted by klaurent MIT, This Week: Astrophysics

Kavli Affiliate: J. S. Villasenor | First 5 Authors: J. Fernando Barbero G., J. Fernando Barbero G., , , | Summary: We analyze from a geometric perspective the Hamiltonian formulation of a recent modification of the Husain-Kuchavr model where, while preserving the connection as a dynamical variable, the other field is restricted to be the […]


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High-redshift AGN population in radiation-hydrodynamics simulations

Posted by klaurent MIT, This Week: Astrophysics

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Teodora-Elena Bulichi, Teodora-Elena Bulichi, , , | Summary: High-redshift active galactic nuclei (AGN) have long been recognized as key probes of early black hole growth and galaxy evolution. However, modeling this population remains difficult due to the wide range of luminosities and black hole masses involved, and […]


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Asymptotically Optimal Repair of Reed-Solomon Codes with Small Sub-Packetization under Rack-Aware Model

Posted by klaurent Peking, This Week: Astrophysics

Kavli Affiliate: Ke Wang | First 5 Authors: Ke Wang, Ke Wang, , , | Summary: This paper presents a comprehensive study on the asymptotically optimal repair of Reed-Solomon (RS) codes with small sub-packetization, specifically tailored for rack-aware distributed storage systems. Through the utilization of multi-base expansion, we introduce a novel approach that leverages monomials […]


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Insights for Early Massive Black Hole Growth from JWST Detection of the [Ne v] λ3427 Emission Line

Posted by klaurent Peking, This Week: Astrophysics

Kavli Affiliate: Claudio Ricci | First 5 Authors: Benny Trakhtenbrot, Benny Trakhtenbrot, , , | Summary: We use the narrow [Ne v] $lambda$3427 emission line detected in the recently published JWST spectra of two galaxies, at z = 6.9 and 5.6, to study the key properties of the active galactic nuclei (AGN) and the supermassive […]


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BASS. XLIX. Characterization of highly luminous and obscured AGNs: local X-ray and [NeV]$λ$3426 emission in comparison with the high-redshift Universe

Posted by klaurent Peking, This Week: Astrophysics

Kavli Affiliate: Claudio Ricci | First 5 Authors: , , , , | Summary: We present a detailed analysis of the most luminous and obscured Active Galactic Nuclei (AGNs) detected in the ultra-hard X-ray band (14-195 keV) by Swift/BAT. Our sample comprises 21 X-ray luminous (log $L_X/rm erg,s^-1>44.6$, 2-10 keV) AGNs at $z<0.6$, optically classified […]


Continue.. BASS. XLIX. Characterization of highly luminous and obscured AGNs: local X-ray and [NeV]$λ$3426 emission in comparison with the high-redshift Universe

The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes

Posted by klaurent Peking, This Week: Astrophysics

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Xiaojing Lin, Xiaojing Lin, , , | Summary: JWST observations have revealed a population of high-redshift "little red dots" (LRDs) that challenge conventional AGN models. We report the discovery of three local LRDs at $z = 0.1-0.2$, initially selected from the SDSS database, with follow-up optical/near-IR spectroscopy […]


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Energy Extraction via Magnetic Reconnection in Kerr-Sen-AdS$_4$ Black Hole: Circular Plasma and Plunging Plasma

Posted by klaurent Peking, This Week: Astrophysics

Kavli Affiliate: Ke Wang | First 5 Authors: Xiao-Xiong Zeng, Xiao-Xiong Zeng, , , | Summary: In this paper, we investigate the power and efficiency of energy extraction through magnetic reconnection in the Kerr-Sen-AdS$_4$ black hole, with a primary focus on both the circular orbit and plunging region. We plot the allowed regions for energy […]


Continue.. Energy Extraction via Magnetic Reconnection in Kerr-Sen-AdS$_4$ Black Hole: Circular Plasma and Plunging Plasma