Results 31 to 40 of about 2,400,614 (354)
The Astrophysical Journal, 2023 We present precise photometric estimates of stellar parameters, including effective temperature, metallicity, luminosity classification, distance, and stellar age, for nearly 26 million stars using the methodology developed in the first paper of this ...
Yang Huang +20 more
doaj +1 more source
BCD Spectrophotometry and Rotation of Active B-Type Stars: Theory and Observations
Galaxies, 2023 This review has two parts. The first one is devoted to the Barbier–Chalonge–Divan (BCD) spectrophotometric system, also known as the Paris spectral classification system.
Juan Zorec
doaj +1 more source
“In-System” Fission-Events: An Insight into Puzzles of Exoplanets and Stars?
Universe, 2021 In expansion of our recent proposal that the solar system’s evolution occurred in two stages—during the first stage, the gaseous giants formed (via disk instability), and, during the second stage (caused by an encounter with a particular stellar-object ...
Elizabeth P. Tito, Vadim I. Pavlov
doaj +1 more source
The SAMI Galaxy Survey: a statistical approach to an optimal classification of stellar kinematics in galaxy surveys [PDF]
Monthly notices of the Royal Astronomical Society, 2020 Large galaxy samples from multiobject integral field spectroscopic (IFS) surveys now allow for a statistical analysis of the z ∼ 0 galaxy population using resolved kinematic measurements.
J. van de Sande +24 more
semanticscholar +1 more source
Automating the Classification of Stellar Spectra [PDF]
Symposium - International Astronomical Union, 1995 We are automating the multi-parameter classification of stellar spectra within the MK system. The increased rate at which spectra are gathered by increasingly larger telescopes, fibre systems and efficient CCD detectors necessitates the need for automation of stellar classification. As well as greatly speeding up this process, an automated scheme would
T. von Hippel, Coryn A. L. Jones
openaire +2 more sources
On the use of logistic regression for stellar classification [PDF]
Experimental astronomy (Print), 2018 We are totally immersed in the Big Data era and reliable algorithms and methods for data classification are instrumental for astronomical research. Random Forest and Support Vector Machines algorithms have become popular over the last few years and they ...
L. Beitia-Antero +2 more
semanticscholar +1 more source
CLASSIFICATION OF STELLAR ORBITS IN AXISYMMETRIC GALAXIES [PDF]
The Astrophysical Journal, 2015 7 pages, 9 figures and 1 table. Submitted to ApJ.
Kelly Holley-Bockelmann +3 more
openaire +4 more sources
The Nature of Blue Stars with Mid-infrared Excesses in the Large Magellanic Cloud
The Astrophysical Journal Supplement Series, 2023 We present low-resolution optical spectra and classifications of 92 blue objects with mid-infrared excesses in the Large Magellanic Cloud. The majority of these objects were selected with the criteria of U − B < 0 and V < 17 from the potential young ...
Ryoko Ishioka +5 more
doaj +1 more source
The Carnegie-Irvine Galaxy Survey. X. Bulges in Stellar Mass–based Scaling Relations
The Astrophysical Journal Supplement Series, 2022 We measure optical colors for the bulges of 312 disk galaxies from the Carnegie-Irvine Galaxy Survey and convert their previously available R -band structural parameters to stellar-mass parameters.
Hua Gao, Luis C. Ho, Zhao-Yu Li
doaj +1 more source
POSYDON: A General-purpose Population Synthesis Code with Detailed Binary-evolution Simulations
The Astrophysical Journal Supplement Series, 2023 Most massive stars are members of a binary or a higher-order stellar system, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical laboratories for the
Tassos Fragos +24 more
doaj +1 more source