X-ray eruptions every 22 days from the nucleus of a nearby galaxy

Kavli Affiliate: Ronald Remillard | First 5 Authors: Muryel Guolo, Dheeraj R. Pasham, Michal Zajaček, Eric R. Coughlin, Suvi Gezari | Summary: Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered, with recurrence times as short as a few hours to a day — known as quasi-periodic X-ray eruption (QPE) sources […]


Continue.. X-ray eruptions every 22 days from the nucleus of a nearby galaxy

X-ray eruptions every 22 days from the nucleus of a nearby galaxy

Kavli Affiliate: Ronald Remillard | First 5 Authors: Muryel Guolo, Dheeraj R. Pasham, Michal Zajaček, Eric R. Coughlin, Suvi Gezari | Summary: Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered, with recurrence times as short as a few hours to a day — known as quasi-periodic X-ray eruption (QPE) sources […]


Continue.. X-ray eruptions every 22 days from the nucleus of a nearby galaxy

Provably safe systems: the only path to controllable AGI

Kavli Affiliate: Max Tegmark | First 5 Authors: Max Tegmark, Steve Omohundro, , , | Summary: We describe a path to humanity safely thriving with powerful Artificial General Intelligences (AGIs) by building them to provably satisfy human-specified requirements. We argue that this will soon be technically feasible using advanced AI for formal verification and mechanistic […]


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Magnetic structures and turbulence in SN 1006 revealed with imaging X-ray polarimetry

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Ping Zhou, Dmitry Prokhorov, Riccardo Ferrazzoli, Yi-Jung Yang, Patrick Slane | Summary: Young supernova remnants (SNRs) strongly modify surrounding magnetic fields, which in turn play an essential role in accelerating cosmic rays (CRs). X-ray polarization measurements probe magnetic field morphology and turbulence at the immediate acceleration […]


Continue.. Magnetic structures and turbulence in SN 1006 revealed with imaging X-ray polarimetry

Gas Clumping in the Outskirts of Galaxy Clusters, an Assessment of the Sensitivity of STAR-X

Kavli Affiliate: Michael McDonald | First 5 Authors: Christian T. Norseth, Daniel R. Wik, John A. ZuHone, Eric D. Miller, Marshall W. Bautz | Summary: In the outskirts of galaxy clusters, entropy profiles measured from X-ray observations of the hot intracluster medium (ICM) drops off unexpectedly. One possible explanation for this effect is gas clumping, […]


Continue.. Gas Clumping in the Outskirts of Galaxy Clusters, an Assessment of the Sensitivity of STAR-X

Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Christian T. Norseth, Daniel R. Wik, John A. ZuHone, Eric D. Miller, Marshall W. Bautz | Summary: In the outskirts of galaxy clusters, entropy profiles measured from X-ray observations of the hot intracluster medium (ICM) drops off unexpectedly. One possible explanation for this effect is gas […]


Continue.. Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Christian T. Norseth, Daniel R. Wik, John A. ZuHone, Eric D. Miller, Marshall W. Bautz | Summary: In the outskirts of galaxy clusters, entropy profiles measured from X-ray observations of the hot intracluster medium (ICM) drops off unexpectedly. One possible explanation for this effect is gas […]


Continue.. Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Christian T. Norseth, Daniel R. Wik, John A. ZuHone, Eric D. Miller, Marshall W. Bautz | Summary: In the outskirts of galaxy clusters, entropy profiles measured from X-ray observations of the hot intracluster medium (ICM) drops off unexpectedly. One possible explanation for this effect is gas […]


Continue.. Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X

Four New Compact Triply Eclipsing Triples found with Gaia and TESS

Kavli Affiliate: Saul A. Rappaport | First 5 Authors: Donát R. Czavalinga, Tamás Borkovits, Tibor Mitnyan, Saul A. Rappaport, András Pál | Summary: This paper presents a comprehensive analysis of four triply eclipsing triple star systems, namely TIC 88206187, TIC 14839347, TIC 298714297, and TIC 66893949. The four systems with third-body eclipses were found in […]


Continue.. Four New Compact Triply Eclipsing Triples found with Gaia and TESS

Twenty-Five Years of Accretion onto the Classical T Tauri Star TW Hya

Kavli Affiliate: David A. Principe | First 5 Authors: Gregory J. Herczeg, Yuguang Chen, Jean-Francois Donati, Andrea K. Dupree, Frederick M. Walter | Summary: Accretion plays a central role in the physics that governs the evolution and dispersal of protoplanetary disks. The primary goal of this paper is to analyze the stability over time of […]


Continue.. Twenty-Five Years of Accretion onto the Classical T Tauri Star TW Hya