Towards windproofing LIGO: Reducing the effect of wind-driven floor tilt by using rotation sensors in active seismic isolation

Posted by klaurent MIT

Kavli Affiliate: Richard Mittleman | Summary:Modern gravitational-wave observatories require robust low-frequency active seismic isolation in order to keep the interferometer at its ideal operating conditions. Seismometers are used to measure both the motion of the ground and isolated platform. These devices are susceptible to contamination from ground tilt at frequencies below 0.1 Hz, particularly arising […]


Continue.. Towards windproofing LIGO: Reducing the effect of wind-driven floor tilt by using rotation sensors in active seismic isolation

Absorption line abundances in the SMC-like galaxy UGC 5282: evidence for ISM dilution from inflows on kiloparsec scales

Posted by klaurent Chicago

Kavli Affiliate: Donald G. York | First 5 Authors: David V. Bowen, Todd M. Tripp, Edward B. Jenkins, Max Pettini, Doron Chelouche | Summary: We present an HST Cosmic Origins Spectrograph (COS) spectrum of the QSO SDSS J095109.12+330745.8 ($z_{em} = 0.645$) whose sightline passes through the SMC-like dwarf galaxy UGC 5282 ($M_B = -16.0$, $cz […]


Continue.. Absorption line abundances in the SMC-like galaxy UGC 5282: evidence for ISM dilution from inflows on kiloparsec scales

Systematic Phase Curve Study of Known Transiting Systems from Year 1 of the TESS Mission

Posted by klaurent MIT

Kavli Affiliate: Robert F. Goeke | First 5 Authors: Ian Wong, Avi Shporer, Tansu Daylan, Björn Benneke, Tara Fetherolf | Summary: We present a systematic phase curve analysis of known transiting systems observed by the Transiting Exoplanet Survey Satellite (TESS) during year one of the primary mission. Using theoretical predictions for the amplitude of the […]


Continue.. Systematic Phase Curve Study of Known Transiting Systems from Year 1 of the TESS Mission

NuSTAR and Chandra Observation of the Galactic Center Non-thermal X-ray Filament G0.13-0.11: A Pulsar Wind Nebula Driven Magnetic Filament

Posted by dbos MIT

Kavli Affiliate: Dheeraj Pasham | First 5 Authors: Shuo Zhang, Zhenlin Zhu, Hui Li, Dheeraj Pasham, Zhiyuan Li | Summary: One of the most unique phenomena in the Galactic center region is the existence of numerous long and narrow filamentary structures within a few hundred parsecs of Sgr A$^{star}$. While more than one than one […]


Continue.. NuSTAR and Chandra Observation of the Galactic Center Non-thermal X-ray Filament G0.13-0.11: A Pulsar Wind Nebula Driven Magnetic Filament

Scaling down an insect-size microrobot, HAMR-VI into HAMR-Jr

Posted by dbos Harvard

Kavli Affiliate: Robert J. Wood | First 5 Authors: Kaushik Jayaram, Jennifer Shum, Samantha Castellanos, E. Farrell Helbling, Robert J. Wood | Summary: Here we present HAMR-Jr, a SI{22.5}{millimeter}, SI{320}{milligram} quadrupedal microrobot. With eight independently actuated degrees of freedom, HAMR-Jr is, to our knowledge, the most mechanically dexterous legged robot at its scale and is […]


Continue.. Scaling down an insect-size microrobot, HAMR-VI into HAMR-Jr

Scaling down an insect-size microrobot, HAMR-VI into HAMR-Jr

Posted by dbos Harvard

Kavli Affiliate: Robert J. Wood | First 5 Authors: Kaushik Jayaram, Jennifer Shum, Samantha Castellanos, E. Farrell Helbling, Robert J. Wood | Summary: Here we present HAMR-Jr, a SI{22.5}{millimeter}, SI{320}{milligram} quadrupedal microrobot. With eight independently actuated degrees of freedom, HAMR-Jr is, to our knowledge, the most mechanically dexterous legged robot at its scale and is […]


Continue.. Scaling down an insect-size microrobot, HAMR-VI into HAMR-Jr

Incorporating electronic information into Machine Learning potential energy surfaces via approaching the ground-state electronic energy as a function of atom-based electronic populations

Posted by klaurent Berkeley

Kavli Affiliate: Kristin A. Persson | First 5 Authors: Xiaowei Xie, Kristin A. Persson, David W. Small, , | Summary: Machine Learning (ML) approximations to Density Functional Theory (DFT) potential energy surfaces (PESs) are showing great promise for reducing the computational cost of accurate molecular simulations, but at present they are not applicable to varying […]


Continue.. Incorporating electronic information into Machine Learning potential energy surfaces via approaching the ground-state electronic energy as a function of atom-based electronic populations

Spatially resolved velocity structure in jets of DF Tau and UY Aur A

Posted by klaurent MIT

Kavli Affiliate: David A. Principe | First 5 Authors: Anastasiia V Uvarova, Hans Moritz Günther, David A. Principe, P. Christian Schneider, | Summary: Young stars accrete mass and angular momentum from their circumstellar disks. Some of them also drive outflows, which can be distinguished in optical forbidden emission lines (FELs). We analyze a sample of […]


Continue.. Spatially resolved velocity structure in jets of DF Tau and UY Aur A

A rapid change in X-ray variability and a jet ejection in the black hole transient MAXI J1820+070

Posted by klaurent MIT

Kavli Affiliate: Dheeraj R. Pasham | First 5 Authors: Jeroen Homan, Joe Bright, Sara E. Motta, Diego Altamirano, Zaven Arzoumanian | Summary: We present Neutron Star Interior Composition Explorer X-ray and Arcminute Microkelvin Imager Large Array radio observations of a rapid hard-to-soft state transition in the black hole X-ray transient MAXI J1820+070. During the transition […]


Continue.. A rapid change in X-ray variability and a jet ejection in the black hole transient MAXI J1820+070