Stellar Rotation and the Extended Main-sequence Turnoff in the Open Cluster NGC 5822 [PDF]
Astrophysical Journal, 2019 The origin of extended main-sequence turnoffs (eMSTOs) in intermediate-age (1–3 Gyr) clusters is one of the most intriguing questions in current star cluster research.
Weijia Sun, R. Grijs, L. Deng, M. Albrow
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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.
openaire +2 more sources
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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Extended Main-sequence Turnoffs in the Double Cluster h and χ Persei: The Complex Role of Stellar Rotation [PDF]
Astrophysical Journal, 2019 Using Gaia Data Release 2 photometry, we report the detection of extended main-sequence turnoff (eMSTO) regions in the color–magnitude diagrams (CMDs) of the ∼14 Myr old double clusters h and χ Persei (NGC 869 and NGC 884). We find that stars with masses
Chengyuan Li +6 more
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How stellar rotation shapes the colour−magnitude diagram of the massive intermediate-age star cluster NGC 1846 [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present a detailed study of stellar rotation in the massive 1.5 Gyr old cluster NGC 1846 in the Large Magellanic Cloud. Similar to other clusters at this age, NGC 1846 shows an extended main-sequence turn-off (eMSTO), and previous photometric ...
S. Kamann +21 more
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Towards age/rotation/magnetic activity relation with seismology
EPJ Web of Conferences, 2015 The knowledge of stellar ages directly impacts the characterization of a planetary system as it puts strong constraints on the moment when the system was born. Unfortunately, the determination of precise stellar ages is a very difficult task.
Mathur Savita
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Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation [PDF]
Astrophysical Journal Supplement Series, 2019 We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). RSP is a new functionality in MESAstar that models the nonlinear radial stellar pulsations that characterize RR Lyrae, Cepheids ...
B. Paxton +18 more
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Double Dipping: A New Relation between Stellar Rotation and Starspot Activity [PDF]
Astrophysical Journal, 2018 We report the discovery of a new relationship between a simple morphological characteristic of light curves produced by starspots and stellar rotation periods.
G. Basri, H. T. Nguyen
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Tidal-locking-induced Stellar Rotation Dichotomy in the Open Cluster NGC 2287? [PDF]
Astrophysical Journal, 2019 Stars spend most of their lifetimes on the “main sequence” (MS) in the Hertzsprung–Russell diagram. The obvious double MSs seen in the equivalent color–magnitude diagrams characteristic of Milky Way open clusters (OCs) pose a fundamental challenge to our
Weijia Sun +3 more
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THE Hα EMISSION OF NEARBY M DWARFS AND ITS RELATION TO STELLAR ROTATION [PDF]
, 2016 The high-energy emission from low-mass stars is mediated by the magnetic dynamo. Although the mechanisms by which fully convective stars generate large-scale magnetic fields are not well understood, it is clear that, as for solar-type stars, stellar ...
E. Newton +5 more
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