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Aims: We develop a method for estimating the properties of stellar winds for low-mass main-sequence stars between masses of 0.4 and 1.1 solar masses at a range of distances from the star. Methods: We use 1D thermal pressure driven…

Solar and Stellar Astrophysics · Physics 2015-04-29 C. P. Johnstone , M. Güdel , T. Lüftinger , G. Toth , I. Brott

Stellar winds govern the spin-down of Solar-type stars as they age, and play an important role in determining planetary habitability, as powerful winds can lead to atmospheric erosion. We calculate three-dimensional stellar wind models for…

Solar and Stellar Astrophysics · Physics 2021-07-14 Dag Evensberget , Bradley D. Carter , Stephen C. Marsden , Leigh Brookshaw , Colin P. Folsom

The basic mechanisms responsible for producing winds from cool, late-type stars are still largely unknown. We take inspiration from recent progress in understanding solar wind acceleration to develop a physically motivated model of the…

Solar and Stellar Astrophysics · Physics 2015-05-30 Steven R. Cranmer , Steven H. Saar

We investigate mass losses via stellar winds from sun-like main sequence stars with a wide range of activity levels. We perform forward-type magnetohydrodynamical numerical experiments for Alfven wave-driven stellar winds with a wide range…

Solar and Stellar Astrophysics · Physics 2015-06-12 Takeru K. Suzuki , Shinsuke Imada , Ryuho Kataoka , Yoshiaki Kato , Takuma Matsumoto , Hiroko Miyahara , Saku Tsuneta

By extending our self-consistent MHD simulations for the solar wind, we study the evolution of stellar winds of solar-type stars from early main sequence stage to red giant phase. Young solar-type stars are active and the mass loss rates…

Solar and Stellar Astrophysics · Physics 2015-06-12 Takeru K. Suzuki

Stellar winds govern the angular momentum evolution of solar-like stars throughout their main-sequence lifetime. The efficiency of this process depends on the geometry of the star's magnetic field. There has been a rapid increase recently…

Solar and Stellar Astrophysics · Physics 2016-11-11 Moira Jardine , Aline Vidotto , Victor See

Cool stars at giant and supergiant evolutionary phases present low velocity and high density winds, responsible for the observed high mass-loss rates. Although presenting high luminosities, radiation pressure on dust particles is not…

Astrophysics · Physics 2009-11-11 D. Falceta-Goncalves , A. A. Vidotto , V. Jatenco-Pereira

Aims: We study the evolution of stellar rotation and wind properties for low-mass main-sequence stars. Our aim is to use rotational evolution models to constrain the mass loss rates in stellar winds and to predict how their properties…

Solar and Stellar Astrophysics · Physics 2015-05-21 C. P. Johnstone , M. Güdel , I. Brott , T. Lüftinger

In this work, we simulate the evolution of the solar wind along its main sequence lifetime and compute its thermal radio emission. To study the evolution of the solar wind, we use a sample of solar mass stars at different ages. All these…

Solar and Stellar Astrophysics · Physics 2019-06-17 D. Ó Fionnagáin , A. A. Vidotto , P. Petit , C. P. Folsom , S. V. Jeffers , S. C. Marsden , J. Morin , J. -D. do Nascimento

As a cool star evolves, it loses mass and angular momentum due to magnetized stellar winds which affect its rotational evolution. This change has consequences that range from the alteration of its activity to influences over the atmosphere…

Solar and Stellar Astrophysics · Physics 2023-07-26 Judy Chebly , Julián D. Alvarado-Gómez , Katja Poppenhäger , Cecilia Garraffo

In the present paper, we model the wind of solar analogues at different ages to investigate the evolution of the solar wind. Recently, it has been suggested that winds of solar type stars might undergo a change in properties at old ages,…

Solar and Stellar Astrophysics · Physics 2018-05-02 D. Ó Fionnagáin , A. A. Vidotto

Alfv\'en-wave-driven 3D magnetohydrodynamic (MHD) models, which are increasingly used to predict stellar wind properties, contain unconstrained parameters and rely on low-resolution stellar magnetograms. We explore the effects of the input…

Solar and Stellar Astrophysics · Physics 2020-04-08 S. Boro Saikia , M. Jin , C. P. Johnstone , T. Lüftinger , M. Güdel , V. S. Airapetian , K. G. Kislyakova , C. P. Folsom

We study the behaviour and properties of the solar wind using a 2.5D Alfv\'en wave driven wind model. We first systematically compare the results of an Alfv\'en wave (AW) driven wind model with a polytropic approach. Polytropic…

Solar and Stellar Astrophysics · Physics 2021-04-14 Soumitra Hazra , Victor Réville , Barbara Perri , Antoine Strugarek , Allan Sacha Brun , Eric Buchlin

Measurements of stellar mass loss rates are used to assess how wind strength varies with coronal activity and age for solar-like stars. Mass loss generally increases with activity, but we find evidence that winds suddenly weaken at a…

The rate at which the solar wind extracts angular momentum from the Sun has been predicted by theoretical models for many decades, and yet we lack a conclusive measurement from in-situ observations. In this letter we present a new estimate…

Solar and Stellar Astrophysics · Physics 2019-11-27 Adam J. Finley , Amy L. Hewitt , Sean P. Matt , Mathew Owens , Rui F. Pinto , Victor Réville

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…

Aims: We study the acceleration of the stellar winds of rapidly rotating low mass stars and the transition between the slow magnetic rotator and fast magnetic rotator regimes. We aim to understand the properties of stellar winds in the fast…

Solar and Stellar Astrophysics · Physics 2017-02-01 C. P. Johnstone

Cool giant and supergiant stars generally present low velocity winds with high mass loss rates. Several models have been proposed to explain the acceleration process of these winds. Although dust is known to be present in these objects, the…

Astrophysics · Physics 2009-11-11 A. A. Vidotto , D. Falceta-Goncalves , V. Jatenco-Pereira

Although the mechanisms responsible for heating the Sun's corona and accelerating the solar wind are still being actively investigated, it is largely accepted that photospheric motions provide the energy source and that the magnetic field…

Solar and Stellar Astrophysics · Physics 2015-06-18 Roberto Lionello , Marco Velli , Cooper Downs , Jon A. Linker , Zoran Mikić , Andrea Verdini

The cumulative effect of the magnetized stellar winds on exoplanets dominates over other forms of star-planet interactions. When combined with photoevaporation, these winds will lead to atmospheric erosion. This is directly connected with…

Solar and Stellar Astrophysics · Physics 2021-11-19 Judy J. Chebly , Julián D. Alvarado-Gómez , Katja Poppenhaeger
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