Results 1 to 10 of about 3,775,618 (221)
A Main Sequence for Quasars [PDF]
Frontiers in Astronomy and Space Sciences, 2018 The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definition of systematic trends in observational properties that are the basis of
Paola Marziani +9 more
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An inverse-linear logistic model of the main sequence [PDF]
Journal of Eye Movement Research, 2017 A model of the main sequence is proposed based on the logistic function. The model’s fit to the peak velocity-amplitude relation resembles an S curve, simulta- neously allowing control of the curve’s asymptotes at very small and very large amplitudes, as
Andrew Duchowski +7 more
doaj +2 more sources
Post-main-sequence planetary system evolution [PDF]
Royal Society Open Science, 2016 The fates of planetary systems provide unassailable insights into their formation and represent rich cross-disciplinary dynamical laboratories. Mounting observations of post-main-sequence planetary systems necessitate a complementary level of theoretical
Dimitri Veras
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Speed-accuracy tradeoffs influence the main sequence of saccadic eye movements [PDF]
Scientific Reports, 2022 Several studies have proposed that an optimal speed-accuracy tradeoff underlies the stereotyped relationship between amplitude, duration and peak velocity of saccades (main sequence).
Leslie Guadron +2 more
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Blue Stragglers After the Main Sequence [PDF]
The Astrophysical Journal, 2008 We study the post-main sequence evolution of products of collisions between main sequence stars (blue stragglers), with particular interest paid to the horizontal branch and asymptotic giant branch phases.
Alison Sills +22 more
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Entropy Production of Main-Sequence Stars [PDF]
Entropy, 2015 The entropy production (inside the volume bounded by a photosphere) of main-sequence stars is calculated based on B–V photometry data. The entropy-production distribution function and the dependences of entropy production on temperature and luminosity ...
Leonid M. Martyushev, Sergey N. Zubarev
doaj +4 more sources
Pre-main-sequence Lithium Depletion [PDF]
, 2004 In this review I briefly discuss the theory of pre-main-sequence (PMS) Li depletion in low-mass (0 ...
A. Ford +35 more
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The Pre--Main-Sequence of A-type stars [PDF]
Proceedings of the International Astronomical Union, 2004 Young A-type stars in the pre--main-sequence (PMS) evolutionary phase are particularly interesting objects since they cover the mass range (1.5-4 solar ma sses) which is most sensitive to the internal conditions inherited during the protostellar phase ...
Marconi, Marcella, Palla, Francesco
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Abundances on the Main Sequence of Omega Centauri [PDF]
The Astrophysical Journal, 2007 Abundance ratios of carbon, nitrogen and strontium relative to iron, calculated using spectrum synthesis techniques, are given for a sample of main sequence and turnoff stars that belong to the globular cluster omega Centauri.
Alonso A. +14 more
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The Ages of Pre-main-sequence Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 The position of pre-main-sequence or protostars in the Hertzsprung--Russell diagram is often used to determine their mass and age by comparison with pre-main-sequence evolution tracks.
Alexander +45 more
core +4 more sources