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

no code implementations • 8 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

Dynamically inflated wind models of classical Wolf-Rayet stars

no code implementations • 10 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

Dusty shells surrounding the carbon variables S Scuti and RT Capricorni

no code implementations • 12 May 2014 • M. Mecina, F. Kerschbaum, M. A. T. Groenewegen, R. Ottensamer, J. A. D. L. Blommaert, A. Mayer, L. Decin, A. Luntzer, B. Vandenbussche, Th. Posch, C. Waelkens

S Sct exhibits a bright, spherically symmetric detached shell, 138" in diameter and co-spatial with an already known CO structure.

Solar and Stellar Astrophysics