Results 61 to 70 of about 5,261,538 (109)

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

open access: yesThe 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

open access: yesThe 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

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

open access: yesThe 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   +9 more
doaj   +1 more source

32. MONTE CARLO TECHNIQUES

open access: yes, 2008
Monte Carlo techniques are often the only practical way to evaluate difficult integrals or to sample random variables governed by complicated probability density functions.
F. James (cern, Monte Carlo Techniques
core  

Diffusion-based Galaxy Simulations for the Nancy Grace Roman Space Telescope High Latitude Survey

open access: yesThe Astrophysical Journal
Future weak lensing analyses with the Nancy Grace Roman Space Telescope (Roman) will require highly realistic image simulations to control shear systematics at unprecedented precision. A key limitation of existing approaches is their reliance on analytic
Diana Scognamiglio   +4 more
doaj   +1 more source

Self-Supervised Spectral Representation Learning for LAMOST

open access: yes
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) has collected tens of millions of spectra, providing an unprecedented resource for large-scale spectroscopic studies.
Lei Yuan   +5 more
core   +1 more source

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

open access: yesThe 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

: Laser sources combining techniques

open access: yes, 2017
International audienceThis paper presents the main techniques used to combine laser sources, in order to increase their level of power. Actually, one can rely on appropriate techniques to add up efficiently, i.e.
Bourdon, Pierre
core   +3 more sources

Cartographic Techniques

open access: yes, 1989
Cartographic Techniques, Cartographic Techniques
core   +2 more sources

Inference for the physical sciences. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2013
Jones NS, Maccarone TJ.
europepmc   +1 more source

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