Probing Rotation of Core-collapse Supernova with Concurrent Analysis of Gravitational Waves and Neutrinos

Posted by klaurent Tokyo

Kavli Affiliate: Mark Vagins | Summary:The next time a core-collapse supernova (SN) explodes in our galaxy, vari- ous detectors will be ready and waiting to detect its emissions of gravitational waves (GWs) and neutrinos. Current numerical simulations have successfully introduced multi-dimensional effects to produce exploding SN models, but thus far the explosion mechanism is not […]


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An HST/COS Observation of Broad Ly$α$ Emission and Associated Absorption Lines of the BL Lacertae Object H 2356-309

Posted by klaurent MIT

Kavli Affiliate: Claude Canizares | Summary:Weak spectral features in BL Lacertae objects (BL Lac) often provide a unique opportunity to probe the inner region of this rare type of active galactic nucleus. We present a Hubble Space Telescope/Cosmic Origins Spectrograph observation of the BL Lac H 2356-309. A weak Ly$α$ emission line was detected. This […]


Continue.. An HST/COS Observation of Broad Ly$α$ Emission and Associated Absorption Lines of the BL Lacertae Object H 2356-309

Fifteen years of the Advanced CCD Imaging Spectrometer

Posted by klaurent MIT

Kavli Affiliate: Peter Ford | Summary:As the Advanced CCD Imaging Spectrometer (ACIS) on the Chandra X-ray Observatory enters its fifteenth year of operation on orbit, it continues to perform well and produce spectacular scientific results. The response of ACIS has evolved over the lifetime of the observatory due to radiation damage, molecular contamination and aging […]


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Advanced LIGO Two-Stage Twelve-Axis Vibration Isolation and Positioning Platform. Part 1: Design and Production Overview

Posted by klaurent MIT

Kavli Affiliate: Richard Mittleman | Summary:New generations of gravity wave detectors require unprecedented levels of vibration isolation. This paper presents the final design of the vibration isolation and positioning platform used in Advanced LIGO to support the interferometers core optics. This five-ton two-and-half-meter wide system operates in ultra-high vacuum. It features two stages of isolation […]


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A framework for modeling the detailed optical response of thick, multiple segment, large format sensors for precision astronomy applications

Posted by klaurent Stanford

Kavli Affiliate: Andrew Rasmussen | Summary:Near-future astronomical survey experiments, such as LSST, possess system requirements of unprecedented fidelity that span photometry, astrometry and shape transfer. Some of these requirements flow directly to the array of science imaging sensors at the focal plane. Availability of high quality characterization data acquired in the course of our sensor […]


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An Extension of the Faddeev-Jackiw Technique to Fields in Curved Spacetimes

Posted by klaurent MIT

Kavli Affiliate: Edmund Bertschinger | Summary:The Legendre transformation on singular Lagrangians, e.g. Lagrangians representing gauge theories, fails due to the presence of constraints. The Faddeev-Jackiw technique, which offers an alternative to that of Dirac, is a symplectic approach to calculating a Hamiltonian paired with a well-defined initial value problem when working with a singular Lagrangian. […]


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Identifying Potential Markers of the Sun’s Giant Convective Scale

Posted by klaurent Stanford

Kavli Affiliate: Philip H. Scherrer | Summary:Line-of-sight magnetograms from the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO) are analyzed using a diagnostic known as the "Magnetic Range of Influence," or MRoI. The MRoI is a measure of the length over which a photospheric magnetogram is balanced and so its application gives […]


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