Results 1 to 10 of about 74,475 (181)
Stellar Motions Along I = 60 - 240 and I = 150 - 330 Inhomogeneous Frequency Distribution of Spectral Types [PDF]
Anuário do Instituto de Geociências, 1990 Applications of the x² test to the frequency distribution of spectral types show a slight predominance of A, F and G stars running approximately along I = 60 - 240 ; along the orthogonal direction, there seems to occur a preponderance of K and M stars.
S. Menge de Freitas
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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
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The Astrophysical Journal, 2023 We consider WIYN/Hydra spectra of 329 photometric candidate members of the 420 Myr old open cluster M48 and report lithium detections or upper limits for 234 members and likely members.
Qinghui Sun +4 more
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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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Spectral detection of multiple stellar populations in z ∼ 1 early-type galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We present a spectroscopic analysis based on measurements of two mainly age-dependent spectrophotometric indices in the 4000A rest frame region, i.e. H+K(CaII) and Delta4000, for a sample of 15 early-type galaxies (ETGs) at 0.7 < z_{spec} < 1.1, morphologically selected in the GOODS-South field.
Lonoce, I. +4 more
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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
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MEDIUM RESOLUTION SPECTRAL LIBRARY OF LATE-TYPE STELLAR TEMPLATES IN NEAR-INFRARED BAND [PDF]
Journal of The Korean Astronomical Society, 2011 We present medium resolution (R = 5000-6000) spectra in the near-infrared band, 1.4-1.8 microns, for template stars in G, K, and M types observed by the echelle spectrometer, IRCS, at the SUBARU 8.2 m telescope. The identification of lines is based on the spectra of Arcturus (K2 III) in the literature.
Le, Huynh Anh N. +7 more
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Empirical 2MASS–WFC3/IR Filter Transformations Across the H-R Diagram from Synthetic Photometry
The Astronomical Journal, 2023 Near-infrared bandpasses on spaceborne observatories diverge from their ground-based counterparts as they are free of atmospheric telluric absorption.
M. J. Durbin +4 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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Automatic Classification of Spectra with IEF-SCNN
Universe, 2023 Telescopes such as the Large Sky Area Multi-Object Spectroscopic Telescope and the Sloan Digital Sky Survey have produced an extensive collection of spectra, challenging the feasibility of manual classification in terms of accuracy and efficiency.
Jingjing Wu +4 more
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