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The M dwarf star GJ 436 hosts a warm-Neptune that is losing substantial amount of atmosphere, which is then shaped by the interactions with the wind of the host star. The stellar wind is formed by particles and magnetic fields that shape…

太阳与恒星天体物理 · 物理学 2023-10-18 A. A. Vidotto , V. Bourrier , R. Fares , S. Bellotti , J. F. Donati , P. Petit , G. A. J. Hussain , J. Morin

Radiation-driven winds heavily influence the evolution and fate of massive stars. Feedback processes from these winds impact the properties of the interstellar medium of their host galaxies. The dependence of mass loss on stellar properties…

The atmospheres and winds of C-type AGB stars are modeled with the 1D spherically symmetric radiation-hydrodynamical code DARWIN. To explore the metallicity-dependence of mass loss we calculate model grids at three different chemical…

太阳与恒星天体物理 · 物理学 2019-03-20 S. Bladh , K. Eriksson , P. Marigo , S. Liljegren , B. Aringer

We provide mass-loss rate predictions for O stars from Large and Small Magellanic Clouds. We calculate global (unified, hydrodynamic) model atmospheres of main sequence, giant, and supergiant stars for chemical composition corresponding to…

太阳与恒星天体物理 · 物理学 2018-04-25 Jiri Krticka , Jiri Kubat

Clumping in the winds of massive stars may significantly reduce empirical mass-loss rates, and which in turn may have a large impact on our understanding of massive star evolution. Here, we investigate wind-clumping through the linear…

天体物理学 · 物理学 2016-08-14 Ben Davies , Jorick S. Vink , René D. Oudmaijer

We present the first results from a high resolution simulation with a focus on galactic wind driving for an isolated galaxy with a halo mass of $\sim 10^{11}$ M$_{\odot}$ (similar to the Large Magellanic Cloud) and a total gas mass of $\sim…

Pre-main-sequence stars are observed to be surrounded by both accretion flows and some kind of wind or jet-like outflow. Recent work by Matt and Pudritz has suggested that if classical T Tauri stars exhibit stellar winds with mass loss…

天体物理学 · 物理学 2009-11-13 Steven R. Cranmer

In the regime of hot stars, winds were not seen as a common thing until the era of UV astronomy. Since we have access to the UV wavelength range, it has become clear that winds are not an exotic phenomenon limited to some special objects,…

太阳与恒星天体物理 · 物理学 2022-11-22 Andreas A. C. Sander

Stellar-feedback driven outflows are predicted to play a fundamental role in the baryon cycle of low-mass galaxies. However, observational constraints of winds in nearby dwarf galaxies are limited as outflows are transient, intrinsically…

星系天体物理 · 物理学 2020-06-24 Kristen B. W. McQuinn , Liese van Zee , Evan D. Skillman

The high luminosity of massive, early-type stars drives strong stellar winds through line scattering of the stars continuum radiation. Their momenta contribute substantially to the dynamics and energetics of the ambient interstellar medium…

太阳与恒星天体物理 · 物理学 2024-06-24 Bharti Arora , Michael De Becker , Jeewan C. Pandey

Extended spectroscopic datasets of several late-B stars of luminosity class Ia revealed the presence of similar peculiarities in their H alpha profiles, which might be interpreted as indications of deviation from spherically symmetric,…

太阳与恒星天体物理 · 物理学 2009-07-08 N. Markova , H. Markov

Recent results from multi-wavelength observations of the inner few hundred pc of the Galactic center have added two new characteristics to the ISM in this unique region. One is the cosmic ray ionization rate derived from H$_3^+$…

星系天体物理 · 物理学 2019-12-25 F. Yusef-Zadeh , M. Wardle , I. Heywood , W. Cotton , M. Royster

We perform numerical simulations to investigate the stellar wind from interacting binary stars. Our aim is to find analytical formulae describing the outflow structure. In each binary system the more massive star is in the asymptotic giant…

太阳与恒星天体物理 · 物理学 2020-02-19 Luis C. Bermúdez-Bustamante , G. García-Segura , W. Steffen , L. Sabin

We present self-consistent dynamical models for dust-driven winds of carbon-rich AGB stars. The models are based on the coupled system of frequency-dependent radiation hydrodynamics and time-dependent dust formation. We investigate in…

天体物理学 · 物理学 2009-04-17 A. C. Andersen , S. Hoefner , R. Gautschy-Loidl

During the evolution of first stars, the CNO elements may emerge on their surfaces due to the mixing processes. Consequently, these stars may have winds driven purely by CNO elements. We study the properties of such stellar winds and…

天体物理学 · 物理学 2009-11-13 Jiri Krticka , Jiri Kubat

I provide an observational review of the properties of starburst-driven galactic superwinds, focusing mainly on recent results pertinent to the transport of metals and energy into the IGM. Absorption-line studies are providing rich…

天体物理学 · 物理学 2007-05-23 D. K. Strickland

Despite a resurgence of effort over the last decade in the area of massive stars there is still ambiguity over their evolutionary path, contamination of their surface abundances and the behaviour of their stellar winds. Here 10 SMC B-type…

天体物理学 · 物理学 2009-11-10 C. Trundle , D. J. Lennon

I discuss some of the important aspects of the phenomena of colliding winds in massive binary star systems with a particular focus on WR140.

太阳与恒星天体物理 · 物理学 2015-03-17 J. M. Pittard

Detailed knowledge about stellar winds and evolution at different metallicities is crucial for understanding stellar populations and feedback in the Local Group of galaxies and beyond. Despite efforts in the literature, we still lack a…

星系天体物理 · 物理学 2022-03-02 W. L. F. Marcolino , J. -C. Bouret , H. J. Rocha-Pinto , M. Bernini-Peron , J. S. Vink

We present results of 3D numerical simulations of magnetically confined, radiatively driven stellar winds of massive stars, conducted using the astrophysical MHD code Pluto, with a focus on understanding the rotational variability of radio…

太阳与恒星天体物理 · 物理学 2017-12-01 Simon Daley-Yates , Ian Stevens
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