Massive Black Holes Seeded by Dark Matter — Implications for Little Red Dots and Gravitational Wave Signatures

Posted by klaurent Peking, This Week: Astrophysics

Tingwei Shen, Xuejian Shen, Huangyu Xiao, Mark Vogelsberger, Fangzhou Jiang | Summary: [[{“value”:”Observations of supermassive black holes (SMBHs) at high redshifts challenge standard seeding scenarios. We examine a dissipative self-interacting dark matter (dSIDM) model in which gravothermal collapse leads to the formation of massive BH seeds ab initio. We utilize a semi-analytical framework to predict […]


Continue.. Massive Black Holes Seeded by Dark Matter — Implications for Little Red Dots and Gravitational Wave Signatures

High Energy Emission from the Intrabinary Shocks in Redback Pulsars

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Roger W. Romani | First 5 Authors: Andrew G. Sullivan, Roger W. Romani, , , | Summary: The intrabinary shocks (IBS) of spider pulsars emit non-thermal synchrotron X-rays from accelerated electrons and positrons in the shocked pulsar wind, likely energized by magnetic reconnection. In redback spider pulsars, the IBS typically wraps around the […]


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Universality of Rényi Entropy in Conformal Field Theory

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Hirosi Ooguri | First 5 Authors: Yuya Kusuki, Hirosi Ooguri, Sridip Pal, , | Summary: We use the thermal effective theory to prove that, for the vacuum state in any conformal field theory in $d$ dimensions, the $n$-th R’enyi entropy $S_A^{(n)}$ behaves as $S_A^{(n)} = frac{f}{(2pi n)^{d-1}} frac{ {rm Area}(partial A)}{(d-2)epsilon^{d-2}}left(1+O(n)right)$ in the […]


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Narrow-Line Seyfert 1 Galaxies Beyond the Local X-ray Universe: An X-ray spectral sample

Posted by klaurent Cambridge

Kavli Affiliate: R. G. McMahon | First 5 Authors: Jiachen Jiang, Dominic J. Walton, Luigi C. Gallo, Andrew C. Fabian, Dirk Grupe | Summary: Narrow-line Seyfert 1 AGNs (NLS1s) represent a unique stage in the black hole growth history, characterised by low black hole masses of approximately $10^{6}$-$10^{8}$ solar masses and around-Eddington accretion rates. X-ray […]


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Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Posted by Peking

Fangzhou Jiang, Zixiang Jiang, Haonan Zheng, Luis C. Ho, Kohei Inayoshi | Summary: [[{“value”:”We present a statistical study on the formation and growth of black holes (BHs) seeded by gravothermal core-collapse of self-interacting dark matter (SIDM) halos at high redshifts, using a semi-analytical framework based on Monte-Carlo merger trees. We demonstrate that BH formation via […]


Continue.. Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Posted by klaurent Peking

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Fangzhou Jiang, Zixiang Jiang, Haonan Zheng, Luis C. Ho, Kohei Inayoshi | Summary: We present a statistical study on the formation and growth of black holes (BHs) seeded by gravothermal core-collapse of self-interacting dark matter (SIDM) halos at high redshifts, using a semi-analytical framework based on Monte-Carlo […]


Continue.. Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Posted by Peking

Fangzhou Jiang, Zixiang Jia, Haonan Zheng, Luis C. Ho, Kohei Inayoshi | Summary: [[{“value”:”We present a statistical study on the formation and growth of black holes (BHs) seeded by gravothermal core-collapse of self-interacting dark matter (SIDM) halos at high redshifts, using a semi-analytical framework based on Monte-Carlo merger trees. We demonstrate that BH formation via […]


Continue.. Formation of the Little Red Dots from the Core-collapse of Self-interacting Dark Matter Halos

Data Preservation in High Energy Physics

Posted by klaurent Stanford

Kavli Affiliate: Concetta Cartaro | First 5 Authors: Alexandre Arbey, Jamie Boyd, Daniel Britzger, Concetta Cartaro, Gang Chen | Summary: Data preservation significantly increases the scientific output of high-energy physics experiments during and after data acquisition. For new and ongoing experiments, the careful consideration of long-term data preservation in the experimental design contributes to improving […]


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Using Wavelet Decomposition to Determine the Dimension of Structures from Projected Images

Posted by klaurent Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Svitlana Mayboroda, David N Spergel, , , | Summary: Mesoscale structures can often be described as fractional dimensional across a wide range of scales. We consider a $gamma$ dimensional measure embedded in an $N$ dimensional space and discuss how to determine its dimension, both in $N$ […]


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Supermassive Black Holes in X-rays: From Standard Accretion to Extreme Transients

Posted by klaurent MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Erin Kara, Javier García, , , | Summary: X-rays are a critical wavelength for understanding supermassive black holes (SMBHs). X-rays probe the inner accretion flow, closest to the event horizon, where gas inspirals, releasing energy and driving black hole growth. This region also governs the launching of […]


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