Bayesian parameter estimation using conditional variational autoencoders for gravitational-wave astronomy [PDF]
Nature Physics, 2021 Gravitational wave (GW) detection is now commonplace and as the sensitivity of the global network of GW detectors improves, we will observe $\mathcal{O}(100)$s of transient GW events per year. The current methods used to estimate their source parameters employ optimally sensitive but computationally costly Bayesian inference approaches where typical ...
Hunter Gabbard +4 more
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Report of combined meeting of Commissions 8 (Meridian Astronomy), 19 (Variation Of Latitude) and 31 (Time), August 21. 9.30 a.m [PDF]
Transactions of the International Astronomical Union, 1950 The President outlined the history of the Ross photographic zenith tube, saying that it was originally designed for measurement of the variation of latitude by Dr Ross, and later adapted to the determination of time by Dr Littel. The success of the instrument and its possible application to various problems in positional astronomy made it of interest ...
Harold Spencer Jones
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Astronomy and Climate-Earth System: Can Magma Motion under Sun-Moon Gravitation Contribute to Paleoclimatic Variations and Earth’s Heat? [PDF]
Advances in Astronomy, 2015 Paleoclimate data have yielded variations with periods of ~23, ~40, and ~100 ky. Thermodynamic changes resulting from orbital eccentricity, obliquity, and precession have been ascribed as the cause of the variations although processes within the oceans and atmosphere may have too short memory to explain such variations.
Zhiren Joseph Wang, Xiaopei Lin
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Revisiting the Transit Timing and Atmosphere Characterization of the Neptune-mass Planet HAT-P-26 b
The Astronomical Journal, 2023 We present a transit-timing variation (TTV) and planetary atmosphere analysis of the Neptune-mass planet HAT-P-26 b. We present a new set of 13 transit light curves from optical ground-based observations and combine them with light curves from the Wide ...
Napaporn A-thano +13 more
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Diffractive-refractive optics for high energy astronomy [PDF]
Astronomy & Astrophysics, 2002 In a companion paper diffractive-refractive optics components such as Fresnel Zone Plates and their derivatives have been proposed as a basis for telescope systems for X-ray and gamma-ray astronomy with high sensitivity and superb angular resolution.
Gerald K. Skinner, Gerald K. Skinner
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DETERMINE THE EFFECTIVE PARAMETERS IN GRAVITATIONAL LENSES AND STUDY THE ALTERNATIVE EFFECTS BETWEEN THEM [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2012 The importance of the gravitational lens in cosmology and astronomy, and a brief historical review for the evolution of the gravitational lenses have been introduced.
S. A.AL-SABAAWE, M. A.AL-OBAYDE
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TESS Timings of 31 Hot Jupiters with Ephemeris Uncertainties
The Astrophysical Journal Supplement Series, 2023 A precise transit ephemeris serves as the premise for follow-up exoplanet observations. We compare TESS Object of Interest (TOI) transit timings of 262 hot Jupiters with the archival ephemeris and find 31 of them having TOI timing offsets, among which ...
Su-Su Shan +10 more
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The Meaning of ‘Secular’ as a Scientific Concept
Secularism and Nonreligion, 2020 The meaning of ‘secular’ in the scientific use of ‘secular trend’, ‘secular variation’, and similar terms is a topic that merits historical investigation.
John Shook
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Long term changes in EUV and X-ray emissions from the solar corona and chromosphere as measured by the response of the Earth’s ionosphere during total solar eclipses from 1932 to 1999 [PDF]
Annales Geophysicae, 2001 Measurements of the ionospheric E region during total solar eclipses in the period 1932–1999 have been used to investigate the fraction of Extreme Ultra Violet and soft X-ray radiation, 8, that is emitted from the limb corona and chromosphere.
C. J. Davis +5 more
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Origin of apparent period variations in eclipsing post-common-envelope binaries [PDF]
Astronomy & Astrophysics, 2013 Apparent period variations detected in several eclipsing, close-compact binaries are frequently interpreted as being caused by circumbinary giant planets. This interpretation raises the question of the origin of the potential planets that must have either formed in the primordial circumbinary disk, together with the host binary star, and survived its ...
Zorotovic, M., Schreiber, M. R.
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