Výsledky vyhledávání - "Stars: mass-loss"

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Science with an ngVLA: Stellar Activity on Red Giant and Supergiant Stars: Mass Loss and the Evolution of the Stellar Dynamo

Autor: Harper, Graham M.

In this Chapter we examine the role of the ngVLA to further our understanding of the different manifestations of convective or turbulence-driven stellar activity on red giant and supergiant stars. The combination of high spatial resolution and high s

Externí odkaz: http://arxiv.org/abs/1810.09353

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Slowing down atomic diffusion in subdwarf B stars: mass loss or turbulence?

Autor: Hu, Haili, Tout, Christopher A., Glebbeek, Evert, Dupret, Marc-Antoine

Subdwarf B stars show chemical peculiarities that cannot be explained by diffusion theory alone. Both mass loss and turbulence have been invoked to slow down atomic diffusion in order to match observed abundances. The fact that some sdB stars show pu

Externí odkaz: http://arxiv.org/abs/1108.1318

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Circumstellar molecular line emission from S-type AGB stars: Mass-loss rates and SiO abundances

Autor: Ramstedt, S., Schoeier, F. L., Olofsson, H.

The main aim is to derive reliable mass-loss rates and circumstellar SiO abundances for a sample of 40 S-type AGB stars based on new multi-transitional CO and SiO radio line observations. In addition, the results are compared to previous results for

Externí odkaz: http://arxiv.org/abs/0903.1672

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The VLT-FLAMES survey of massive stars: Mass loss and rotation of early-type stars in the SMC

Autor: Mokiem, M. R., de Koter, A., Evans, C. J., Puls, J., Smartt, S. J., Crowther, P. A., Herrero, A., Langer, N., Lennon, D. J., Najarro, F., Villamariz, M. R., Yoon, S. -C.

We have studied the optical spectra of a sample of 31 O- and early B-type stars in the Small Magellanic Cloud, 21 of which are associated with the young massive cluster NGC 346. Stellar parameters are determined using an automated fitting method. Com

Externí odkaz: http://arxiv.org/abs/astro-ph/0606403

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Hot Stars Mass-loss studied with Spectro-Polarimetric INterferometry (SPIN)

Autor: Chesneau, Olivier, Wolf, Sebastian, de Souza, Armando Domiciano

Publikováno v: Astron.Astrophys.410:375-388,2003

We present a prospective work undertaken on Spectro-Polarimetric INterferometry (SPIN). Our theoretical studies suggest that SPIN is a powerful tool for studying the mass loss from early type stars. Based on Monte Carlo simulations, we computed the e

Externí odkaz: http://arxiv.org/abs/astro-ph/0307407

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