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Covariant phase space with boundaries
Published 2021“…The covariant phase space method of Iyer, Lee, Wald, and Zoupas gives an elegant way to understand the Hamiltonian dynamics of Lagrangian field theories without breaking covariance. …”
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Cosmology with the Laser Interferometer Space Antenna
Published 2023“…Abstract The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale. …”
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Hierarchy in the phase space and dark matter astronomy
Published 2010“…We develop a theoretical framework for describing the hierarchical structure of the phase space of cold dark matter haloes, due to gravitationally bound substructures. …”
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State space for planar Majorana zero modes
Published 2012“…Zero modes arising from a planar Majorana equation in the presence of N vortices require an N-dimensional state space, where N=2[superscript N/2] for N even and N=2[superscript (N+1)/2] for N odd. …”
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Slower recovery in space before collapse of connected populations
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HUBBLE SPACE TELESCOPE NEAR-ULTRAVIOLET SPECTROSCOPY OF BRIGHT CEMP-s STARS
Published 2016“…We present an elemental-abundance analysis, in the near-ultraviolet (NUV) spectral range, for the bright carbon-enhanced metal-poor (CEMP) stars HD 196944 (V = 8.40, [Fe/H] = −2.41) and HD 201626 (V = 8.16, [Fe/H] = −1.51), based on data acquired with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope. …”
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Self-Organized Resonance during Search of a Diverse Chemical Space
Published 2017“…Here, we study the stochastic search of a toy chemical space by a collection of reacting Brownian particles subject to periodic forcing. …”
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Radioisotope Thermophotovoltaic Generator Design Methods and Performance Estimates for Space Missions
Published 2021“…This work provides the design methodology of a radioisotope thermophotovoltaic system (RTPV) using spectral control for space missions. The focus is on the feasibility of a practical system by using two-dimensional micropatterned photonic crystal emitters, selecting the proper thermophotovoltaic cell and insulation material to exclude material incompatibilities, to optimize the system efficiency by impedance matching and to design a radiator with minimum mass. …”
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First Operation of TES Microcalorimeters in Space with the Micro-X Sounding Rocket
Published 2021“…This calibration data demonstrate the capabilities of the detector in a space environment as well as its potential for future flights.…”
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Latest results from the Alpha Magnetic Spectrometer on the International Space Station
Published 2022“…In four years on the International Space Station, the AMS experiment has collected more than 65 billion cosmic rays up to TeV energies. …”
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Linear-Field Particle Acceleration in Free Space by Spatiotemporally Structured Laser Pulses
Published 2021“…We show that net energy transfer via linear-field forces, between a laser pulse and a bunch of multiple interacting electrons, can be realized in unbounded free space by engineering the spatiotemporal structure of light.…”
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HUBBLE SPACE TELESCOPE MEASURES OF MASS ACCRETION RATES IN THE ORION NEBULA CLUSTER
Published 2015“…Such observational effort is needed to properly constrain the theory of star formation and disk evolution. Based on Hubble Space Telescope/WFPC2 observations, we present a study of [dot over M][subscript acc] for a sample of ~700 sources in the Orion Nebula Cluster, ranging from the hydrogen-burning limit to M [subscript *] ~ 2 M [subscript ☉]. …”
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The need for a multi-purpose, optical–NIR space facility after HST and JWST
Published 2021“…Abstract In the early 2030s, after the end of operations for the epochal Hubble Space Telescope and the long-anticipated James Webb Space Telescope, astrophysics will lose access to a general purpose high-spatial resolution space observatory to cover the UV–optical–NIR wavelength range with a variety of imaging bandpasses and high-multiplexing mid-resolution spectroscopy. …”
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New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars
Published 2013“…We report the results of an observing campaign using the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope to study the detailed heavy-element abundance patterns in four metal-poor stars. …”
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EVIDENCE FOR TYPE Ia SUPERNOVA DIVERSITY FROM ULTRAVIOLET OBSERVATIONS WITH THE HUBBLE SPACE TELESCOPE
Published 2015“…We present ultraviolet (UV) spectroscopy and photometry of four Type Ia supernovae (SNe 2004dt, 2004ef, 2005M, and 2005cf) obtained with the UV prism of the Advanced Camera for Surveys on the Hubble Space Telescope. This data set provides unique spectral time series down to 2000 Å. …”
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Strong-field tidal distortions of rotating black holes. III. Embeddings in hyperbolic three-space
Published 2018“…We also showed how to visualize these distorted black holes by embedding their horizons in a global Euclidean three-space, E^{3}. Such visualizations illustrate interesting and important information about horizon dynamics. …”
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Search for CP violation in the phase space of D0→π+π−π+π− decays
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