Magnetic propeller effect in the spectra of young stars
| Autor: | Vladimir Grinin, I. S. Potravnov, I. V. Ilyin, S. G. Shulman |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
Propeller Astronomy Resonance Magnetosphere Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Accretion (astrophysics) Spectral line Magnetic field Stars Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Outflow Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy Letters. 41:407-416 |
| ISSN: | 1562-6873 1063-7737 |
| DOI: | 10.1134/s1063773715070014 |
| Popis: | The origin of the blueshifted narrow absorption components in the resonance sodium doublet lines observed in the spectra of some young stars is discussed. Such components are assumed to be formed by the interaction of the circumstellar gas with the stellar magnetosphere in the magnetic propeller regime. The results of observations for the post UX Ori star RZ Psc are discussed in detail. This star shows distinctive signatures of mass outflow in the absence of any clear accretion signatures. Such a picture is quite possible in the magnetic propeller regime. Estimates show that for this regime to be realized, the star must have a surface magnetic field of ~1 kG at an accretion rate that does not exceed 10-10 M . yr-1. |
| Databáze: | OpenAIRE |
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