Demonstration of resolving power $λ/Δλ> 10,000$ for a space-based x-ray transmission grating spectrometer

Posted by klaurent MIT

Kavli Affiliate: Mark Schattenburg | Summary:We present measurements of the resolving power of a soft x-ray spectrometer consisting of 200 nm-period lightweight, alignment-insensitive critical-angle transmission (CAT) gratings and a lightweight slumped-glass Wolter-I focusing mirror pair. We measure and model contributions from source, mirrors, detector pixel size, and grating period variation to the natural line width […]


Continue.. Demonstration of resolving power $λ/Δλ> 10,000$ for a space-based x-ray transmission grating spectrometer

Shift Symmetries in (Anti) de Sitter Space

Posted by klaurent Chicago

Kavli Affiliate: Austin Joyce | Summary:We construct a class of extended shift symmetries for fields of all integer spins in de Sitter (dS) and anti-de Sitter (AdS) space. These generalize the shift symmetry, galileon symmetry, and special galileon symmetry of massless scalars in flat space to all symmetric tensor fields in (A)dS space. These symmetries […]


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The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: I. Kinematics of the stellar body

Posted by klaurent Peking

Kavli Affiliate: Eric Peng | First 5 Authors: Eric Emsellem, Remco F. J. van der Burg, Jeremy Fensch, Tereza Jerabkova, Anita Zanella | Summary: The so-called ultra-diffuse galaxy NGC~1052-DF2 was announced to be a galaxy lacking dark matter based on a spectroscopic study of its constituent globular clusters. Here we present the first spectroscopic analysis […]


Continue.. The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: I. Kinematics of the stellar body

Surface curvature guides early construction activity in mound-building termites

Posted by klaurent Harvard

Kavli Affiliate: Radhika Nagpal | First 5 Authors: Daniel S. Calovi, Paul Bardunias, Nicole Carey, J. Scott Turner, Radhika Nagpal | Summary: Termite colonies construct towering, complex mounds, in a classic example of distributed agents coordinating their activity via interaction with a shared environment. The traditional explanation for how this coordination occurs focuses on the […]


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SOFIA Far Infrared Imaging Polarimetry of M82 and NGC 253: Exploring the Super-Galactic Wind

Posted by klaurent Stanford

Kavli Affiliate: Rodriguez Enrique Lopez | Summary:We present Far-Infrared polarimetry observations of M82 at 53 and $154~μrmm$ and NGC 253 at $89~μrmm$, which were taken with HAWC+ in polarimetry mode on the Stratospheric Observatory for Infrared Astronomy (SOFIA). The polarization of M82 at $53~μrmm$ clearly shows a magnetic field geometry perpendicular to the disk in […]


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Jetting to dripping transition: critical aspect ratio in step emulsifiers

Posted by klaurent Harvard

Kavli Affiliate: David Weitz | First 5 Authors: Andrea Montessori, Marco Lauricella, Elad Stolovicki, David Weitz, Sauro Succi | Summary: Fully three-dimensional, time-dependent, direct simulations of the non-ideal Navier-Stokes equations for a two-component fluid, shed light into the mechanism which inhibits droplet breakup in step emulsifiers below a critical threshold of the the width-to-height ($w/h$) […]


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Future Opportunities in Accelerator-based Neutrino Physics

Posted by klaurent Tokyo

Kavli Affiliate: Mark Hartz | Summary:This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for accelerator-based neutrino physics in Europe. The importance of the field across its many complementary components is stressed. Recommendations are […]


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Future Opportunities in Accelerator-based Neutrino Physics

Posted by klaurent Tokyo

Kavli Affiliate: Masayuki Nakahata | First 5 Authors: Andrea Dell’Acqua, Antoni Aduszkiewicz, Markus Ahlers, Hiroaki Aihara, Tyler Alion | Summary: This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for accelerator-based neutrino physics in […]


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Ground motion prediction at gravitational wave observatories using archival seismic data

Posted by klaurent MIT

Kavli Affiliate: Richard Mittleman | Summary:Gravitational wave observatories have always been affected by tele-seismic earthquakes leading to a decrease in duty cycle and coincident observation time. In this analysis, we leverage the power of machine learning algorithms and archival seismic data to predict the ground motion and the state of the gravitational wave interferometer during […]


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Unveiling the Rich and Diverse Universe of Subsecond Astrophysics through LSST Star Trails

Posted by klaurent Stanford

Kavli Affiliate: Steven Kahn | Summary:We present a unique method that allows the LSST to scan the sky for stellar variability on short timescales. The operational component of the strategy requires LSST to take star trail images. The image processing component uses deep learning to sift for transient events on timescales down to 10 ms. […]


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