Results 11 to 20 of about 1,035 (121)
Using R-based VOStat as a low resolution spectrum analysis tool [PDF]
, 2007 We describe here an online software suite VOStat written mainly for the Virtual Observatory, a novel structure in which astronomers share terabyte scale data. Written mostly in the public-domain statistical computing language and environment R, it can do
Babu, Jogesh G., Mahabal, Ashish A.
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Special Issue on Astrostatistics [PDF]
CHANCE, 2019 Like most areas of science, astronomy has benefited from a tremendous increase in the amount of available data gathered in recent decades, from both ground- and space-based instruments.
Jessi Cisewski-Kehe, Chad Schafer
openaire +1 more source
Autoencoding Galaxy Spectra. II. Redshift Invariance and Outlier Detection
The Astronomical Journal, 2023 We present an unsupervised outlier detection method for galaxy spectra based on the spectrum autoencoder architecture spender , which reliably captures spectral features and provides highly realistic reconstructions for SDSS galaxy spectra.
Yan Liang +4 more
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Tidal Streams as Probes of the Galactic Potential [PDF]
, 1998 We explore the use of tidal streams from Galactic satellites to recover the potential of the Milky Way. Our study is motivated both by the discovery of the first lengthy stellar stream in the halo (\cite{it98}) and by the prospect of measuring proper ...
David N. Spergel +8 more
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The Farmer: A Reproducible Profile-fitting Photometry Package for Deep Galaxy Surveys
The Astrophysical Journal Supplement Series, 2023 While space-borne optical and near-infrared facilities have succeeded in delivering a precise and spatially resolved picture of our Universe, their small survey area is known to underrepresent the true diversity of galaxy populations.
J. R. Weaver +19 more
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Genetic Algorithm Modeling with GPU Parallel Computing Technology [PDF]
, 2012 We present a multi-purpose genetic algorithm, designed and implemented with GPGPU / CUDA parallel computing technology. The model was derived from a multi-core CPU serial implementation, named GAME, already scientifically successfully tested and ...
Brescia, Massimo +5 more
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Autoregressive Times Series Methods for Time Domain Astronomy
Frontiers in Physics, 2018 Celestial objects exhibit a wide range of variability in brightness at different wavebands. Surprisingly, the most common methods for characterizing time series in statistics—parametric autoregressive modeling—are rarely used to interpret astronomical ...
Eric D. Feigelson +4 more
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Ponderings on the Possible Preponderance of Perpendicular Planets
The Astrophysical Journal Letters, 2023 Misalignments between planetary orbits and the equatorial planes of their host stars are clues about the formation and evolution of planetary systems. Earlier work found evidence for a peak near 90° in the distribution of stellar obliquities, based on ...
Jared C. Siegel +2 more
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A Statistical Search for a Uniform Trigger Threshold in Solar Flares from Individual Active Regions
The Astrophysical Journal, 2023 Solar flares result from the sudden release of energy deposited by subphotospheric motions into the magnetic field of the corona. The deposited energy accumulates secularly between events. One may interpret the observed event statistics as resulting from
Julian B. Carlin +2 more
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Intrinsic scatter of caustic masses and hydrostatic bias: An observational study [PDF]
, 2017 All estimates of cluster mass have some intrinsic scatter and perhaps some bias with true mass even in the absence of measurement errors for example caused by cluster triaxiality and large scale structure.
Andreon, S. +3 more
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