Results 1 to 10 of about 3,384 (302)
Variability Of Stellar Granulation And Convective Blueshift With Spectral Type And Magnetic Activity [PDF]
Astronomy & Astrophysics, 2016 {"references": ["Allende Prieto, C., Koesterke, L, Ludwig, H.-G., Freytag, B., & Caffau, E. 2013, A&A, 550, A103", "Allende Prieto, C., Lambert, D. L., Tull, R. G., & MacQueen, P. J. 2002, ApJL, 566, L93", "Beeck, B., Cameron, R. H., Reiners, A., Schussler, M. 2013, A&A, 558, A49", "Beeck, B., Schussler, M., Cameron, R. H., Reiners, A.,
Meunier, Nadege +5 more
core +6 more sources
Stellar Chromospheric Variability
Universe, 2021 Cool stars with convective envelopes of spectral types F and later tend to exhibit magnetic activity throughout their atmospheres. The presence of strong and variable magnetic fields is evidenced by photospheric starspots, chromospheric plages and ...
Richard de Grijs, Devika Kamath
doaj +2 more sources
On the Construction of a New 3D Atlas of Stellar Spectral Energy Distributions
Open Astronomy, 2014 Modern spectrophotometric atlases are burdened with significant systematic errors. In particular, the problems of spectrum calibration in the ultraviolet region are not solved; different parts of the spectrum are not thoroughly fit to each other; spectra
Mironov A. V. +4 more
doaj +3 more sources
A collection of model stellar spectra for spectral types B to early-M [PDF]
Astronomy & Astrophysics, 2018 Context. Models of stellar spectra are necessary for interpreting light from individual stars, planets, integrated stellar populations, nebulae, and the interstellar medium.Aims. We provide a comprehensive and homogeneous collection of synthetic spectra for a wide range of atmospheric parameters and chemical compositions.Methods.
Prieto, Carlos Allende +5 more
openaire +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
doaj +2 more sources
Astrophysics and Space Science, 1991 Empirical effective temperatures of 211 early-type stars found in a previous investigation (Kontizas and Theodossiou, 1980; Theodossiou, 1985) are combined with the effective temperatures of other 313 early-type stars found from literature. From these effective temperatures of a total number of 524 early-type stars of spectral types from O8 to F6 we ...
Theodossiou, E., Danezis, E.
openaire +3 more sources
SPIDER VIII – constraints on the stellar initial mass function of early-type galaxies from a variety of spectral features [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 34 pages, 27 figures; V2.
F La Barbera +2 more
exaly +3 more sources
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 +2 more sources
Morphological Feature Distances among the Spectral Types of SDSS Galaxies
The Astrophysical JournalThis study investigates the morphological feature distances among various spectral types of galaxies from the Sloan Digital Sky Survey, including strong and weak active galactic nuclei (AGN), quasi-stellar objects (QSOs), quiescent, and star-forming ...
Duho Kim, Garreth Martin
doaj +2 more sources
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