Results 11 to 20 of about 3,384 (302)
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
doaj +1 more source
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
openaire +2 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
openaire +2 more sources
From theoretical stellar spectra to realistic models of the Milky Way : a never ending Odyssey [PDF]
, 2007 The last chapter is dedicated to the compilation of the results and the discussion about the success of - but also about the problems that have arisen during - and in part also survived - this work. The main goal of this thesis was, firstly, to convert
Ammon, Karin
core +1 more source
Magnetic Activity of Different Types of Variable Stars Observed by TESS Mission
, 2023 The investigation of the magnetic activity of different types of variable stars holds significant implications for our understanding of the physical processes and evolution of stars.
Liyun Zhang +3 more
core +1 more source
The Astronomical Journal, 2023 High-precision stellar masses and radii measured directly from binaries can effectively calibrate stellar models. However, such a database containing full spectral types and a large range of metallicity is still not fully established. A continuous effort
Jianping Xiong +8 more
doaj +1 more source
The Astrophysical Journal, 2023 We identify 71 distant stars in James Webb Space Telescope/NIRCam early release observations (ERO) images of the field of galaxy cluster SMACS J0723.3-7327 (SMACS 0723).
Jake Summers +25 more
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