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We use the EAGLE cosmological hydrodynamic simulation suite to study the specific angular momentum of galaxies, $j$, with the aims of (i) investigating the physical causes behind the wide range of $j$ at fixed mass and (ii) examining…

We have studied the dynamical evolution of rotating star clusters with mass spectrum using a Fokker-Planck code. As a simplest multi-mass model, we first investigated the two-component clusters. Rotation is found to accelerate the dynamical…

Astrophysics · Physics 2009-11-10 Eunhyeuk Kim , Hyung Mok Lee , Rainer Spurzem

The evolution of neutron stars in close binary systems with a low-mass companion is considered assuming the magnetic field to be confined within the solid crust. We adopt the standard scenario of the evolution in a close binary system in…

Astrophysics · Physics 2009-10-30 V. Urpin , U. Geppert , D. Konenkov

Rotation plays a key role in the star-formation process, from pre-stellar cores to pre-main-sequence (PMS) objects. Understanding the formation of massive stars requires taking into account the accretion of angular momentum during their PMS…

Solar and Stellar Astrophysics · Physics 2017-05-24 Lionel Haemmerlé , Patrick Eggenberger , Georges Meynet , André Maeder , Corinne Charbonnel , Ralf S. Klessen

(Abridged) The dynamical ejection of stars from star clusters affects the shape of the stellar mass function (MF) in these clusters, because the escape probability of a star depends on its mass. The objective of this paper is to provide and…

Astrophysics of Galaxies · Physics 2015-05-14 J. M. Diederik Kruijssen

The rotation of horizontal branch stars places important constraints on angular momentum evolution in evolved stars and therefore rotational mixing on the giant branch. Prompted by new observations of rotation rates of horizontal branch…

Astrophysics · Physics 2009-10-31 A. Sills , M. Pinsonneault

Observations of stellar rotation show that low-mass stars lose angular momentum during the main sequence. We simulate the winds of Sun-like stars with a range of rotation rates, covering the fast and slow magneto-rotator regimes, including…

The time evolution of angular momentum and surface rotation of massive stars is strongly influenced by fossil magnetic fields via magnetic braking. We present a new module containing a simple, comprehensive implementation of such a field at…

Solar and Stellar Astrophysics · Physics 2020-02-05 Z. Keszthelyi , G. Meynet , M. E. Shultz , A. David-Uraz , A. ud-Doula , R. H. D. Townsend , G. A. Wade , C. Georgy , V. Petit , S. P. Owocki

The surface angular velocity evolution of low-mass stars is now globally understood and the main physical mechanisms involved in it are observationally quite constrained. Additionally, recent observations showed anomalies in the rotation…

Earth and Planetary Astrophysics · Physics 2018-11-14 Florian Gallet , Emeline Bolmont , Jérôme Bouvier , Stéphane Mathis , Corinne Charbonnel

Context. Using asteroseismic techniques, it has recently become possible to probe the internal rotation profile of low-mass (~1.1-1.5 Msun) subgiant and red giant stars. Under the assumption of local angular momentum conservation, the core…

Solar and Stellar Astrophysics · Physics 2016-04-20 F. Spada , M. Gellert , R. Arlt , S. Deheuvels

We present a MUSE and KMOS dynamical study 405 star-forming galaxies at redshift z=0.28-1.65 (median redshift z=0.84). Our sample are representative of star-forming, main-sequence galaxies, with star-formation rates of SFR=0.1-30Mo/yr and…

We consider the magnetic and spin evolution of isolated neutron stars assuming that the magnetic field is initially confined to the crust. The evolution of the crustal field is determined by the conductive properties of the crust which, in…

Astrophysics · Physics 2015-06-24 Vadim Urpin , Denis Konenkov

Young low-mass stars are characterized by ejection of collimated outflows and by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its final mass and is also believed to power the…

Solar and Stellar Astrophysics · Physics 2015-05-28 S. Orlando , F. Reale , G. Peres , A. Mignone

We present new models for the rotational evolution of solar-like stars between 1 Myr and 10 Gyr with the aim to reproduce the distributions of rotational periods observed for star forming regions and young open clusters within this age…

Solar and Stellar Astrophysics · Physics 2015-06-16 Florian Gallet , Jérôme Bouvier

We investigate a sample of 6 Herbig Ae/Be stars belonging to the Orion OB1 association, as well as 73 low mass objects, members of the $\sigma$ Orionis cluster, in order to explore the angular momentum evolution at early stages of…

We perform three-dimensional numerical simulations of stellar winds of early-M dwarf stars. Our simulations incorporate observationally reconstructed large-scale surface magnetic maps, suggesting that the complexity of the magnetic field…

Solar and Stellar Astrophysics · Physics 2015-06-18 A. A. Vidotto , M. Jardine , J. Morin , J. F. Donati , M. Opher , T. I. Gombosi

Rotation Powered-Pulsars are subjected to long-term changes in their period of rotation, which are measured by timing observations of their rotation frequency and its derivatives ($\Omega$, $\dot{\Omega}$, $\ddot{\Omega}$). If the spin-down…

High Energy Astrophysical Phenomena · Physics 2015-05-13 Rodrigo Negreiros , Cristian Bernal

The stellar rotation has an essential role in modifying the structure of the star and, therefore, the way these different interplays arise. On the other hand, changes in orbits impact the star's rotation and its evolution. The evolution of…

Earth and Planetary Astrophysics · Physics 2024-04-11 Thiago M. Santiago , Sarah G. A. Barbosa , Francisco J. Cavalcante , Daniel B. de Freitas

Some contracting or expanding stars are thought to host a large-scale magnetic field in their radiative interior. By interacting with the contraction-induced flows, such fields may significantly alter the rotational history of the star.…

Solar and Stellar Astrophysics · Physics 2022-05-18 B. Gouhier , L. Jouve , F. Lignières

We consider the spin angular momentum evolution of the accreting components of Algol-type binary stars. In wider Algols the accretion is through a disc so that the accreted material can transfer enough angular momentum to the gainer that…

Solar and Stellar Astrophysics · Physics 2015-05-18 A. Dervişoğlu , Christopher A. Tout , C. İbanoğlu