Results 21 to 30 of about 4,688 (310)
Open Astronomy, 2014 Distribution functions are found for some models of mass distribution in infinitely thin disks with an elliptical velocity distribution (Maclaurin, Kuzmin-Toomre, Hénon and Mestel disks).
Ossipkov L. P.
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A Study of Eight Visual-spectroscopic Southern Binaries Using Recent SOAR Observations
The Astronomical Journal, 2023 Speckle observations performed between 2019 and 2022 with the HRCam attached to the 4.1 m SOAR telescope (Cerro Pachón, Chile) permitted to improve visual orbits of the southern binaries WDS 01243-0655 (BU 1163), WDS 09275-5806 (CHR 240), WDS 12114-1647 (
José A. Docobo +4 more
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Grigori Kuzmin and Stellar Dynamics
Open Astronomy, 2011 Grigori Kuzmin was a very gifted dynamicist and one of the towering figures in the distinguished history of the Tartu Observatory. He obtained a number of important results in relative isolation which were later rediscovered in the West.
Zeeuw P. Tim de, Ven Glenn van de
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Interaction Between Convection and Pulsation
Living Reviews in Solar Physics, 2015 This article reviews our current understanding of modelling convection dynamics in stars. Several semi-analytical time-dependent convection models have been proposed for pulsating one-dimensional stellar structures with different formulations for how the
Günter Houdek, Marc-Antoine Dupret
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Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster
The Astronomical Journal, 2023 The determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutionary
Wolfgang Brandner +2 more
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Combining Stellar Evolution and Stellar Dynamics [PDF]
Symposium - International Astronomical Union, 1996 There seem to me to be four approaches to the problem of computing the evolution of star clusters. Firstly, one might assume that our knowledge of the evolution of stars can be condensed into a subroutine that can be added to an N-body code. This subroutine would mainly have to give the radius and the time-dependent mass of a star as a function of its ...
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Stellar Dynamical Modeling—Counting Conserved Quantities
Research in Astronomy and Astrophysics, 2023 Abstract Knowing the conserved quantities that a galaxy’s stellar orbits conform to is important in helping us understand the stellar distribution and structures within the galaxy. Isolating integrals of motion and resonances are particularly important, non-isolating integrals less so.
Richard J. Long, Shude Mao, Yougang Wang
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A Dynamically Distinct Stellar Population in the Leading Arm of the Sagittarius Stream
The Astrophysical Journal Letters, 2023 We present a chemical and dynamical analysis of the leading arm (LA) and trailing arm (TA) of the Sagittarius (Sgr) stream, as well as for the Sgr dwarf galaxy core (SC), using red giant branch, main-sequence, and RR Lyrae stars from large spectroscopic ...
Gwibong Kang +3 more
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The Astrophysical Journal, 2023 Stars can be either disrupted as tidal disruption events (TDEs) or swallowed whole by massive black holes (MBHs) at galactic centers when they approach sufficiently close to these MBHs.
Yunfeng Chen, Qingjuan Yu, Youjun Lu
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Relativistic Stellar Dynamics [PDF]
Symposium - International Astronomical Union, 1983 Three main areas of relativistic stellar dynamics are reviewed: (a) Relativistic clusters, (b) Systems containing a massive black hole, and (c) Perturbed expanding Universes. The emphasis is on the use of orbit perturbations.
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