Results 61 to 70 of about 526 (97)

Different Planetary Eccentricity-period (PEP) Distributions of Small and Giant Planets

The Astronomical Journal
We used the database of 1040 short-period (1 ≤ P < 200 days) exoplanets radial-velocity orbits to study the planetary eccentricity-period (PEP) distribution.
Dolev Bashi, Tsevi Mazeh, Simchon Faigler   +2 more
doaj   +1 more source

Discovery of Radial Spectral Hardening in the Hot Bubble of Planetary Nebula BD+30°3639 with Median Energy Imaging

The Astrophysical Journal
We apply an imaging analysis technique to study the spatial distribution of the X-ray spectral hardness across the hot bubble of planetary nebula BD+30°3639.
Rodolfo Montez Jr.
doaj   +1 more source

Singular Spectrum Analysis of Exoplanetary Transits

The Astronomical Journal
Transit photometry is currently the most efficient and sensitive method for detecting extrasolar planets (exoplanets) and a large majority of confirmed exoplanets have been detected with this method.
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source

Estimating Galaxy Parameters with Self-organizing Maps and the Effect of Missing Data

The Astronomical Journal
The current and upcoming large data volume galaxy surveys require the use of machine-learning techniques to maximize their scientific return. This study explores the use of Self-Organizing Maps (SOMs) to estimate galaxy parameters with a focus on ...
Valentina La Torre, Anna Sajina, Andy D. Goulding, Danilo Marchesini, Rachel Bezanson, Alan N. Pearl, Laerte Sodré Jr.   +6 more
doaj   +1 more source

Deep Learning Improves Photometric Redshifts in All Regions of Color Space

The Astrophysical Journal
Photometric redshifts (photo- z ’s) are crucial for the cosmology, galaxy evolution, and transient science drivers of next-generation imaging facilities like the Euclid Mission, the Vera C.
Emma R. Moran, Brett H. Andrews, Jeffrey A. Newman, Biprateep Dey   +3 more
doaj   +1 more source

GRB Progenitor Classification from Gamma-Ray Burst Prompt and Afterglow Observations

The Astrophysical Journal
Using an established classification technique, we leverage standard observations and analyses to predict the progenitors of gamma-ray bursts (GRBs). This technique, utilizing support vector machine statistics, provides a more nuanced prediction than the ...
P. Nuessle, J. L. Racusin, N. E. White
doaj   +1 more source

Galaxy and Mass Assembly (GAMA): Stellar-to-dynamical Mass Relation. II. Peculiar Velocities

The Astrophysical Journal
Empirical correlations connecting starlight to galaxy dynamics (e.g., the fundamental plane (FP) of elliptical/quiescent (Q) galaxies and the Tully–Fisher relation of spiral/star-forming (SF) galaxies) provide cosmology-independent distance estimation ...
M. Burak Dogruel, Edward N. Taylor, Michelle Cluver, Matthew Colless, Anna de Graaff, Alessandro Sonnenfeld, John R. Lucey, Francesco D’Eugenio, Cullan Howlett, Khaled Said   +9 more
doaj   +1 more source

Inference for the physical sciences. [PDF]

Philos Trans A Math Phys Eng Sci, 2013
Jones NS, Maccarone TJ.
europepmc   +1 more source

Data-space Validation of High-dimensional Models by Comparing Sample Quantiles

The Astrophysical Journal Supplement Series
We present a simple method for assessing the predictive performance of high-dimensional models directly in data space when only samples are available.
Stephen Thorp, Hiranya V. Peiris, Daniel J. Mortlock, Justin Alsing, Boris Leistedt, Sinan Deger   +5 more
doaj   +1 more source

Straight to the Source: Detecting Aggregate Objects in Astronomical Images with Proper Error Control. [PDF]

J Am Stat Assoc, 2013
Friedenberg DA, Genovese CR.
europepmc   +1 more source