Results 1 to 10 of about 3,630 (165)
Atoms, 2023 Stellar atmospheres separate the hot and dense stellar interiors from the emptiness of space. Radiation escapes from the outermost layers of a star, carrying direct physical information.
Carlos Allende Prieto
doaj +3 more sources
ESNet: Estimating Stellar Parameters from LAMOST Low-Resolution Stellar Spectra
Universe, 2023 Stellar parameters are estimated through spectra and are crucial in studying both stellar evolution and the history of the galaxy. To extract features from the spectra efficiently, we present ESNet (encoder selection network for spectra), a novel ...
A-Li Luo, Fuji Ren, Qiu Bo
exaly +3 more sources
Galaxies, 2018 The Belgian repository of fundamental atomic data and stellar spectra (BRASS) aims to provide the largest systematic and homogeneous quality assessment to-date of input atomic data required for stellar spectral synthesis.
M Laverick, A Lobel, Pierre Royer
exaly +3 more sources
All Spectral Type LAMOST Spectra Library (ATLAS)
The Astrophysical Journal Supplement Series, 2023 We present an empirical stellar spectra library, ATLAS, with resolution R ∼ 1800 and wavelength coverage from 3800–8700 Å. These spectra are homogeneously observed by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and have been released in
Wei Ji +6 more
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The Astronomical Journal, 2022 The Sloan Digital Sky Survey (SDSS) has recently initiated its fifth survey generation (SDSS-V), with a central focus on stellar spectroscopy. In particular, SDSS-V's Milky Way Mapper program will deliver multiepoch optical and near-infrared spectra for ...
Ilya Straumit +15 more
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Automated Stellar Spectra Classification with Ensemble Convolutional Neural Network
Advances in Astronomy, 2022 Large sky survey telescopes have produced a tremendous amount of astronomical data, including spectra. Machine learning methods must be employed to automatically process the spectral data obtained by these telescopes. Classification of stellar spectra by
Zhuang Zhao, Jiyu Wei, Bin Jiang
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ACCELERATED FITTING OF STELLAR SPECTRA [PDF]
The Astrophysical Journal, 2016 ABSTRACT Stellar spectra are often modeled and fitted by interpolating within a rectilinear grid of synthetic spectra to derive the stars’ labels: stellar parameters and elemental abundances. However, the number of synthetic spectra needed for a rectilinear grid grows exponentially with the label space dimensions, precluding the ...
Yuan-Sen Ting (丁源森) +2 more
openaire +3 more sources
Stellar Parameters and Chemical Abundances Estimated from LAMOST-II DR8 MRS Based on Cycle-StarNet
The Astrophysical Journal Supplement Series, 2023 Deriving stellar atmospheric parameters and chemical abundances from stellar spectra is crucial for understanding the evolution of the Milky Way. By performing a fitting with MARCS model atmospheric theoretical synthetic spectra combined with a domain ...
Rui Wang +5 more
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Solar and stellar photospheric abundances
Living Reviews in Solar Physics, 2016 The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations.
Carlos Allende Prieto
doaj +1 more source
The Astrophysical Journal, 2023 We investigate the mass–metallicity relationship of star-forming galaxies by analyzing the absorption line spectra of ∼200,000 galaxies in the Sloan Digital Sky Survey.
Eva Sextl +3 more
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