Results 21 to 30 of about 1,140,165 (333)
Rotation and Stellar Evolution [PDF]
Symposium - International Astronomical Union, 1981 Does rotation influence stellar evolution? Does it cause observational effects other than line broadening? Can rotation be responsible for mixing of chemical elements throughout the star? Do evolved stars have rapidly rotating cores? This, for instance, is of interest if one wants to compute the details of supernova events.
H.-C. Thomas, R. Kippenhahn
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The stellar rotation–activity relationship in fully convective M dwarfs [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The coronal activity-rotation relationship is considered to be a proxy for the underlying stellar dynamo responsible for magnetic activity in solar and late-type stars.
N. Wright +4 more
semanticscholar +1 more source
Intrinsic Ambipolarity and Rotation in Stellarators [PDF]
Physical Review Letters, 2008 It is shown that collisional plasma transport is intrinsically ambipolar only in quasiaxisymmetric or quasihelically symmetric magnetic configurations. Only in such fields can the plasma rotate freely, and then only in the direction of quasisymmetry. In a non-quasi-symmetric magnetic field, the average radial electric field is determined by parallel ...
Helander, P., Simakov, A.
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The stellar activity‐rotation relationship [PDF]
Astronomische Nachrichten, 2013 AbstractUsing a new catalog of 824 solar and late‐type stars with measured X‐ray luminosities and rotation periods we have studied the relationship between rotation and stellar activity that is believed to be a probe of the underlying stellar dynamo. Using an unbiased subset of the sample we calculate the power law slope of the unsaturated regime of ...
Nicholas J. Wright +3 more
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Forward Modeling of the Kepler Stellar Rotation Period Distribution: Interpreting Periods from Mixed and Biased Stellar Populations [PDF]
Astrophysical Journal, 2018 Stellar surface rotation carries information about stellar parameters—particularly ages—and thus the large rotational data sets extracted from Kepler time series represent powerful probes of stellar populations.
J. V. van Saders +2 more
semanticscholar +1 more source
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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MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS [PDF]
, 2013 We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar.
B. Paxton +10 more
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Constraining the evolution of stellar rotation using solar twins [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2019 The stellar Rotation $vs.$ Age relation is commonly considered as a useful tool to derive reliable ages for Sun-like stars. However, in the light of \kepler\ data, the presence of apparently old and fast rotators that do not obey the usual gyrochronology
D. Lorenzo-Oliveira +9 more
semanticscholar +1 more source
Stellar Rotation and Mixing [PDF]
Symposium - International Astronomical Union, 1997 Many observations indicate that some mixing occurs in stellar radiation zones: in massive stars, chemical elements resulting from nuclear burning in the core are detected at the surface, and in solar-type stars lithium is depleted with age. Since all mixing processes transport also momentum, the depletion of lithium should be linked with the loss of ...
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The Astronomical Journal, 2023 We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 days are overwhelmingly binaries, with typical separations of
Marina Kounkel +5 more
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