Discovery of soft and hard X-ray time lags in low-mass AGNs

Kavli Affiliate: Daniel R. Wilkins | Summary:The scaling relations between the black hole (BH) mass and soft lag properties for both active galactic nuclei (AGNs) and BH X-ray binaries (BHXRBs) suggest the same underlying physical mechanism at work in accreting BH systems spanning a broad range of mass. However, the low-mass end of AGNs has […]


Continue.. Discovery of soft and hard X-ray time lags in low-mass AGNs

Discovery of soft and hard X-ray time lags in low-mass AGNs

Kavli Affiliate: Daniel R. Wilkins | First 5 Authors: Labani Mallick, Daniel R. Wilkins, William N. Alston, Alex Markowitz, Barbara De Marco | Summary: The scaling relations between the black hole (BH) mass and soft lag properties for both active galactic nuclei (AGNs) and BH X-ray binaries (BHXRBs) suggest the same underlying physical mechanism at […]


Continue.. Discovery of soft and hard X-ray time lags in low-mass AGNs

Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters

Kavli Affiliate: Adam B. Mantz | First 5 Authors: Jenny T. Wan, Adam B. Mantz, Jack Sayers, Steven W. Allen, R. Glenn Morris | Summary: We use a sample of 14 massive, dynamically relaxed galaxy clusters to constrain the Hubble Constant, $H_0$, by combining X-ray and Sunyaev-Zel’dovich (SZ) effect signals measured with Chandra, Planck and […]


Continue.. Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters

Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Kavli Affiliate: T. A. Shutt | Summary:Two-phase xenon detectors, such as that at the core of the forthcoming LZ dark matter experiment, use photomultiplier tubes to sense the primary (S1) and secondary (S2) scintillation signals resulting from particle interactions in their liquid xenon target. This paper describes a simulation study exploring two techniques to lower […]


Continue.. Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Kavli Affiliate: T. A. Shutt | First 5 Authors: D. S. Akerib, A. K. Al Musalhi, S. K. Alsum, C. S. Amarasinghe, A. Ames | Summary: Two-phase xenon detectors, such as that at the core of the forthcoming LZ dark matter experiment, use photomultiplier tubes to sense the primary (S1) and secondary (S2) scintillation signals […]


Continue.. Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Dark Matter Constraints from a Unified Analysis of Strong Gravitational Lenses and Milky Way Satellite Galaxies

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: Ethan O. Nadler, Simon Birrer, Daniel Gilman, Risa H. Wechsler, Xiaolong Du | Summary: Joint analyses of small-scale cosmological structure probes are relatively unexplored and promise to advance measurements of microphysical dark matter properties using heterogeneous data. Here, we present a multidimensional analysis of dark matter […]


Continue.. Dark Matter Constraints from a Unified Analysis of Strong Gravitational Lenses and Milky Way Satellite Galaxies

Lessons from the German Tank Problem

Kavli Affiliate: George Clark | Summary:During World War II the German army used tanks to devastating advantage. The Allies needed accurate estimates of their tank production and deployment. They used two approaches to find these values: spies, and statistics. This note describes the statistical approach. Assuming the tanks are labeled consecutively starting at 1, if […]


Continue.. Lessons from the German Tank Problem

Dynamical Masses and Stellar Evolutionary Model Predictions of M-Stars

Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Jamila Pegues, Ian Czekala, Sean M. Andrews, Karin I. Öberg, Gregory J. Herczeg | Summary: In this era of Gaia and ALMA, dynamical stellar mass measurements provide benchmarks that are independent of observations of stellar characteristics and their uncertainties. These benchmarks can then be used to […]


Continue.. Dynamical Masses and Stellar Evolutionary Model Predictions of M-Stars

Point absorbers in Advanced LIGO

Kavli Affiliate: Rainer Weiss | Summary:Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nano-meter scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduces the sensitivity of the interferometer directly though a reduction in the power-recycling gain and indirect interactions with […]


Continue.. Point absorbers in Advanced LIGO