Search Results for author: A. de Koter

Found 3 papers, 0 papers with code

Analytic, dust-independent mass-loss rates for red supergiant winds initiated by turbulent pressure

no code implementations8 Jan 2021 N. D. Kee, J. O. Sundqvist, L. Decin, A. de Koter, H. Sana

We find that the pressure due to the characteristic turbulent velocities inferred for red supergiants is sufficient to explain the mass-loss rates of these objects in the absence of the normally employed opacity from circumstellar dust.

Solar and Stellar Astrophysics

A relation between the radial velocity dispersion of young clusters and their age: Evidence for hardening as the formation scenario of massive close binaries

no code implementations5 Jan 2021 M. C. Ramírez-Tannus, F. Backs, A. de Koter, H. Sana, H. Beuther, A. Bik, W. Brandner, L. Kaper, H. Linz, Th. Henning, J. Poorta

Using literature data, we measured the radial-velocity dispersion ($\sigma_\mathrm{RV}$) as a proxy for the close binary fraction in ten OB associations in the Galaxy and the Large Magellanic Cloud, spanning an age range from 1 to 6 Myrs.

Solar and Stellar Astrophysics Astrophysics of Galaxies

Dynamically inflated wind models of classical Wolf-Rayet stars

no code implementations10 Dec 2020 L. G. Poniatowski, J. O. Sundqvist, N. D. Kee, S. P. Owocki, P. Marchant, L. Decin, A. de Koter, L. Mahy, H. Sana

The resulting velocity structure is non-monotonic and can be separated into three phases: i) an initial acceleration to supersonic speeds ii) stagnation and even deceleration, and iii) an outer region of rapid re-acceleration.

Solar and Stellar Astrophysics

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