Results 1 to 10 of about 116,321 (322)
Predicting Stellar Rotation Periods Using XGBoost [PDF]
Astronomy & Astrophysics, 2023 Context. The estimation of rotation periods of stars is a key challenge in stellar astrophysics. Given the large amount of data available from ground-based and space-based telescopes, there is a growing interest in finding reliable methods to quickly and automatically estimate stellar rotation periods with a high level of accuracy and precision.
Nuno Gomes +2 more
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Rotation and stellar evolution [PDF]
EPJ Web of Conferences, 2013 The effects of rotation on the evolution and properties of low-mass stars are first discussed from the pre-main sequence to the red giant phase. We then briefly indicate how some observational constraints available for these stars can help us progress in
Eggenberger P.
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Stellar ages and stellar rotation
, 2016 Stellar ages will play a big role in the next generation of astronomy. Useful to exoplaneteers and galactic archaeologists alike, this relatively under-exploited stellar property is currently limited by the precision of dating techniques. The work presented in this thesis contributes incrementally to a greater understanding of rotation period decay in ...
Ruth Angus
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Extended main sequences in star clusters [PDF]
Fundamental ResearchExtended main sequences (eMSs) and extended main-sequence turn-offs (eMSTOs) are fascinating phenomena that are routinely observed in star clusters. These phenomena strongly challenge the current canonical “simple stellar population” picture of star ...
Chengyuan Li +3 more
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The Astrophysical Journal, 2023 Stellar rotation is crucial for studying stellar evolution, since it provides information about age, angular momentum transfer, and magnetic fields of stars.
Alexandre Araújo, Adriana Valio
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Stellar ages from stellar rotation [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractOur ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass.
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Stellar multiplicity and stellar rotation: insights from APOGEE
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACTWe measure rotational broadening in spectra taken by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey to characterize the relationship between stellar multiplicity and rotation. We create a sample of 2786 giants and 24 496 dwarfs with stellar parameters and multiple radial velocities from the APOGEE pipeline, projected
Christine Mazzola Daher +20 more
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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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A study of stellar population of intermediate-age globular cluster NGC 2249
Results in Physics, 2020 The Large Magellanic Cloud (LMC) star cluster NGC 2249 has been found to exhibit an extended main-sequence turn-off (eMSTO) in the color-magnitude diagram (CMD) derived from the data of the Hubble Space Telescope (HST).
Zhongmu Li +4 more
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Disk accretion onto a magnetized star
EPJ Web of Conferences, 2014 The problem of interaction of the rotating magnetic field, frozen to a star, with a thin well conducting accretion disk is solved exactly. It is shown that a disk pushes the magnetic field lines towards a star, compressing the stellar dipole magnetic ...
Istomin Ya. N., Haensel P.
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