Observational Constrains on Direct Electron Heating in Hot Accretion Flows from Sgr A* and M87*

Kavli Affiliate: Feng Yuan | First 5 Authors: Fu-Guo Xie, Ramesh Narayan, Feng Yuan, , | Summary: An important parameter in the theory of hot accretion flows around black holes is $delta$, which describes the fraction of “viscously” dissipated energy in the accretion flow that directly heats the electrons. The radiative efficiency of a hot […]


Continue.. Observational Constrains on Direct Electron Heating in Hot Accretion Flows from Sgr A* and M87*

CLAD: A Contrastive Learning based Approach for Background Debiasing

Kavli Affiliate: Ke Wang | First 5 Authors: Ke Wang, Harshitha Machiraju, Oh-Hyeon Choung, Michael Herzog, Pascal Frossard | Summary: Convolutional neural networks (CNNs) have achieved superhuman performance in multiple vision tasks, especially image classification. However, unlike humans, CNNs leverage spurious features, such as background information to make decisions. This tendency creates different problems in […]


Continue.. CLAD: A Contrastive Learning based Approach for Background Debiasing

Fractional Statistics

Kavli Affiliate: Frank Wilczek | First 5 Authors: Martin Greiter, Frank Wilczek, , , | Summary: The quantum-mechanical description of assemblies of particles whose motion is confined to two (or one) spatial dimensions offers many possibilities that are distinct from bosons and fermions. We call such particles anyons. The simplest anyons are parameterized by an […]


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The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Wenxiu Li, Kohei Inayoshi, Masafusa Onoue, Daisuke Toyouchi, | Summary: The early evolution of the quasar luminosity function (QLF) and black hole mass function (BHMF) encodes key information on the physics determining the radiative and accretion processes of supermassive black holes (BHs) in high-$z$ quasars. Although the […]


Continue.. The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes

The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Wenxiu Li, Kohei Inayoshi, Masafusa Onoue, Daisuke Toyouchi, | Summary: The early evolution of the quasar luminosity function (QLF) and black hole mass function (BHMF) encodes key information on the physics determining the radiative and accretion processes of supermassive black holes (BHs) in high-$z$ quasars. Although the […]


Continue.. The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes

A dense $mathbf{0.1 M_{rm odot}}$ star in a 51-minute orbital period eclipsing binary

Kavli Affiliate: Erin Kara | First 5 Authors: Kevin B. Burdge, Kareem El-Badry, Thomas R. Marsh, Saul Rappaport, Warren R. Brown | Summary: In over a thousand known cataclysmic variables (CVs), where a white dwarf is accreting from a hydrogen-rich star, only a dozen have orbital periods below 75 minutes. One way to achieve these […]


Continue.. A dense $mathbf{0.1 M_{rm odot}}$ star in a 51-minute orbital period eclipsing binary

X-ray Reverberation Mapping of Ark 564 using Gaussian Process Regression

Kavli Affiliate: Daniel R. Wilkins | First 5 Authors: Collin D. Lewin, Erin Kara, Daniel R. Wilkins, Guglielmo Mastroserio, Javier A. GarcĂ­a | Summary: Ark 564 is an extreme high-Eddington Narrow-line Seyfert 1 galaxy, known for being one of the brightest, most rapidly variable soft X-ray AGN, and for having one of the lowest temperature […]


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A dense $mathbf{0.1 M_{rm odot}}$ star in a 51-minute orbital period eclipsing binary

Kavli Affiliate: Saul Rappaport | First 5 Authors: Kevin B. Burdge, Kareem El-Badry, Thomas R. Marsh, Saul Rappaport, Warren R. Brown | Summary: In over a thousand known cataclysmic variables (CVs), where a white dwarf is accreting from a hydrogen-rich star, only a dozen have orbital periods below 75 minutes. One way to achieve these […]


Continue.. A dense $mathbf{0.1 M_{rm odot}}$ star in a 51-minute orbital period eclipsing binary

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Kavli Affiliate: Maria Elena Monzani | First 5 Authors: Antonio Boveia, Thomas Y. Chen, Caterina Doglioni, Alex Drlica-Wagner, Stefania Gori | Summary: The fundamental nature of Dark Matter is a central theme of the Snowmass 2021 process, extending across all frontiers. In the last decade, advances in detector technology, analysis techniques and theoretical modeling have […]


Continue.. Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Kavli Affiliate: Maria Elena Monzani | First 5 Authors: Antonio Boveia, Thomas Y. Chen, Caterina Doglioni, Alex Drlica-Wagner, Stefania Gori | Summary: The fundamental nature of Dark Matter is a central theme of the Snowmass 2021 process, extending across all frontiers. In the last decade, advances in detector technology, analysis techniques and theoretical modeling have […]


Continue.. Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)