Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization

Posted by klaurent Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Boyuan Liu, Daniel Kessler, Thomas Gessey-Jones, Jiten Dhandha, Anastasia Fialkov | Summary: The first generation of stars, known as Population III (Pop III), played a crucial role in the early Universe through their unique formation environment and metal-free composition. These stars can undergo chemically homogeneous evolution (CHE) […]


Continue.. Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization

Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts

Posted by klaurent Peking

Kavli Affiliate: Kejia Lee | First 5 Authors: Xiaohui Liu, Heng Xu, Jiarui Niu, Yongkun Zhang, Jinchen Jiang | Summary: Fast radio bursts (FRBs), typically highly polarized, usually have a nearly constant polarization position angle (PA) during each burst. Some bursts show significant PA variations, and one of them was claimed to have a PA […]


Continue.. Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts

Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts

Posted by dbos Peking

Kavli Affiliate: Kejia Lee | First 5 Authors: Xiaohui Liu, Heng Xu, Jiarui Niu, Yongkun Zhang, Jinchen Jiang | Summary: Fast radio bursts (FRBs), typically highly polarized, usually have a nearly constant polarization position angle (PA) during each burst. Some bursts show significant PA variations, and one of them was claimed to have a PA […]


Continue.. Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts

Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

Posted by dbos MIT

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Arnab Sarkar, Michael McDonald, Lindsey Bleem, Mark Bautz, Bradford A. Benson | Summary: We present joint South Pole Telescope (SPT) and XMM-Newton observations of 8 massive galaxy clusters (0.8–1.7$times$10$^{15}$ M$_{odot}$) spanning a redshift range of 0.16 to 0.35. Employing a novel SZ+X-ray fitting technique, we effectively […]


Continue.. Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

Posted by dbos MIT

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Arnab Sarkar, Michael McDonald, Lindsey Bleem, Mark Bautz, Bradford A. Benson | Summary: We present joint South Pole Telescope (SPT) and XMM-Newton observations of 8 massive galaxy clusters (0.8–1.7$times$10$^{15}$ M$_{odot}$) spanning a redshift range of 0.16 to 0.35. Employing a novel SZ+X-ray fitting technique, we effectively […]


Continue.. Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

Posted by dbos MIT

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Arnab Sarkar, Michael McDonald, Lindsey Bleem, Mark Bautz, Bradford A. Benson | Summary: We present joint South Pole Telescope (SPT) and XMM-Newton observations of 8 massive galaxy clusters (0.8–1.7$times$10$^{15}$ M$_{odot}$) spanning a redshift range of 0.16 to 0.35. Employing a novel SZ+X-ray fitting technique, we effectively […]


Continue.. Constraints on Non-Thermal Pressure at galaxy cluster outskirts from a Joint SPT and XMM-Newton Analysis

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

Posted by klaurent Peking

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

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 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 […]


Continue.. Universality of Rényi Entropy in Conformal Field Theory

Universality of Rényi Entropy in Conformal Field Theory

Posted by dbos 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 […]


Continue.. Universality of Rényi Entropy in Conformal Field Theory