Results 51 to 60 of about 890,794 (377)

Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy.

open access: yesPhysical Review Letters, 2019
The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in the direct measurement of gravitational waves ...
M. Tse   +200 more
semanticscholar   +1 more source

Photonic Integrated Circuits for Microwave Astronomy

open access: yesInventions, 2023
One of the main objectives of cosmology is the measurement of the Cosmic Microwave Background (CMB) polarization and, in particular, the so-called B-modes, which could demonstrate the existence of the primordial gravitational waves generated at the early
Guillermo Pascual-Cisneros   +2 more
doaj   +1 more source

Laboratory Astrophysics and the State of Astronomy and Astrophysics [PDF]

open access: yes, 2009
Laboratory astrophysics and complementary theoretical calculations are the foundations of astronomy and astrophysics and will remain so into the foreseeable future.
:   +13 more
core   +3 more sources

Toward a unified equation of state for multi-messenger astronomy [PDF]

open access: yesAstronomy & Astrophysics, 2020
Aims. We aim to present a first step in developing a benchmark equation-of-state (EoS) model for multi-messenger astronomy that unifies the thermodynamics of quark and hadronic degrees of freedom. Methods.
Michał Marczenko   +3 more
semanticscholar   +1 more source

The Thirty Gigahertz Instrument Receiver for the QUIJOTE Experiment: Preliminary Polarization Measurements and Systematic-Error Analysis

open access: yesSensors, 2015
This paper presents preliminary polarization measurements and systematic-error characterization of the Thirty Gigahertz Instrument receiver developed for the QUIJOTE experiment.
Francisco J. Casas   +11 more
doaj   +1 more source

ASTRONOMY IN RENAISSANCE ART

open access: yesVitruvian Cogitationes, 2022
What is the importance of presenting, explaining and conceptualizing the sky as a phenomenon of nature in the midst of Renaissance works of art? In this study are presented some artistic constructs of the Renaissance that are described in detail.
Mario Livio
doaj   +1 more source

Exploring the Time Domain With Synoptic Sky Surveys [PDF]

open access: yes, 2011
Synoptic sky surveys are becoming the largest data generators in astronomy, and they are opening a new research frontier, that touches essentially every field of astronomy.
A. A. Mahabal   +17 more
core   +3 more sources

Teraelectronvolt Astronomy [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2009
Ground-based γ-ray astronomy, which provides access to the TeV energy range, is a young and rapidly developing discipline. Recent discoveries in this waveband have important consequences for a wide range of topics in astrophysics and astroparticle physics.
Hinton, JA, Hofmann, W
openaire   +3 more sources

Astronomical Investigation to Verify the Calendar Theory of the Nasca Lines

open access: yesApplied Sciences, 2021
As in many regions of the world, astronomy also played a major role in the ancient Peruvian cultures. However, the discussion of the astronomical relevance of the Nasca geoglyphs is very controversial.
Christiane Richter   +2 more
doaj   +1 more source

Parameter estimation in astronomy through application of the likelihood ratio. [satellite data analysis techniques

open access: yes, 1979
Many problems in the experimental estimation of parameters for models can be solved through use of the likelihood ratio test. Applications of the likelihood ratio, with particular attention to photon counting experiments, are discussed.
W. Cash
semanticscholar   +1 more source

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