Results 1 to 10 of about 503 (57)

Quantification of High-dimensional Non-Gaussianities and Its Implication to Fisher Analysis in Cosmology [PDF]

open access: yesThe Astrophysical Journal, 2023
It is well known that the power spectrum is not able to fully characterize the statistical properties of non-Gaussian density fields. Recently, many different statistics have been proposed to extract information from non-Gaussian cosmological fields that
Core Francisco Park   +3 more
doaj   +2 more sources

Formation of the first three gravitational-wave observations through isolated binary evolution. [PDF]

open access: yesNat Commun, 2017
During its first 4 months of taking data, Advanced LIGO has detected gravitational waves from two binary black hole mergers, GW150914 and GW151226, along with the statistically less significant binary black hole merger candidate LVT151012.
Stevenson S   +6 more
europepmc   +11 more sources

The Data Big Bang and the Expanding Digital Universe: High-Dimensional, Complex and Massive Data Sets in an Inflationary Epoch [PDF]

open access: yesAdvances in Astronomy, Volume 2010, Issue 1, 2010., 2010
Recent and forthcoming advances in instrumentation, and giant new surveys, are creating astronomical data sets that are not amenable to the methods of analysis familiar to astronomers.
McCollum, Bruce   +2 more
core   +5 more sources

Coronal Heating as Determined by the Solar Flare Frequency Distribution Obtained by Aggregating Case Studies

open access: yesThe Astrophysical Journal, 2023
Flare frequency distributions represent a key approach to addressing one of the largest problems in solar and stellar physics: determining the mechanism that counterintuitively heats coronae to temperatures that are orders of magnitude hotter than the ...
James Paul Mason   +1001 more
doaj   +1 more source

Characterizing the Conditional Galaxy Property Distribution Using Gaussian Mixture Models

open access: yesThe Astrophysical Journal, 2023
Line-intensity mapping (LIM) is a promising technique to constrain the global distribution of galaxy properties. To combine LIM experiments probing different tracers with traditional galaxy surveys and fully exploit the scientific potential of these ...
Yucheng Zhang   +7 more
doaj   +1 more source

The Overlooked Potential of Generalized Linear Models in Astronomy - I: Binomial Regression [PDF]

open access: yes, 2015
Revealing hidden patterns in astronomical data is often the path to fundamental scientific breakthroughs; meanwhile the complexity of scientific inquiry increases as more subtle relationships are sought.
Biffi, V.   +8 more
core   +2 more sources

Intrinsic scatter of caustic masses and hydrostatic bias: An observational study [PDF]

open access: yes, 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
core   +2 more sources

Discerning Exoplanet Migration Models Using Spin-Orbit Measurements [PDF]

open access: yes, 2010
We investigate the current sample of exoplanet spin-orbit measurements to determine whether a dominant planet migration channel can be identified, and at what confidence.
Chatterjee   +24 more
core   +2 more sources

Discovering and Locating High-Energy Extra-Galactic Sources by Bayesian Mixture Modelling [PDF]

open access: yes, 2018
Discovering and locating gamma-ray sources in the whole sky map is a declared target of the Fermi Gamma-ray Space Telescope collaboration. In this paper, we carry out an unsupervised analysis of the collection of high-energy photons accumulated by the ...
DA Dyk van   +13 more
core   +3 more sources

Systematic search for gamma-ray periodicity in active galactic nuclei detected by the Fermi Large Area Telescope [PDF]

open access: yes, 2020
We use nine years of gamma-ray data provided by the Fermi Large Area Telescope (LAT) to systematically study the light curves of more than two thousand active galactic nuclei (AGN) included in recent Fermi-LAT catalogs. Ten different techniques are used,
Ajello, M.   +10 more
core   +3 more sources
astrostatistics techniques
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