Atmospheres, magnetism, mass loss of red supergiant stars
نویسندگان
چکیده
منابع مشابه
Atmospheric dynamics and the mass loss process in red supergiant stars
Context. Red supergiant stars represent a key phase in the evolution of massive stars. Recent radiative hydrodynamic simulations suggest that their atmospheres may be the location of large-scale convective motions. Aims. As supergiant convection is expected to generate supersonic motions and shocks, we seek constraints on these atmospheric motions and their possible relation with mass-loss rate...
متن کاملInfrared Spectra and Visibilities as Probes of the Outer Atmospheres of Red Supergiant Stars
In the light of the recent results of the stellar interferometry, we examine the nature of the extra molecular layer outside the photosphere of red supergiant stars, so far studied mostly with the use of the infrared spectra. Although the visibility data are more direct probes of the spatial structure of the outer atmosphere, it is essential that they are analyzed in combination with the spectr...
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Context. Mass loss plays a dominant role in the evolution of low mass stars while they are on the Asymptotic Giant Branch (AGB). The gas and dust ejected during this phase are a major source in the mass budget of the interstellar medium. Recent studies have pointed towards the importance of variations in the mass-loss history of such objects. Aims. By modelling the full line profile of low exci...
متن کاملAtmospheric Dynamics of Red Supergiant Stars and Interferometry
We developed a 3D pure LTE radiative transfer code to derive observables expected for RSGs, with emphasis on small scale structures, from radiative-hydrodynamic (RHD) simulations of red supergiant stars (RSGs) carried out with CO5BOLD (Freytag et al., 2002). We show that the convection-related surface structures are observable with today’s interferometers. Moreover, the RHD simulations are a gr...
متن کاملAtmospheric Dynamics of Red Supergiant Stars and Applications to Interferometry
We have written a 3D radiative transfer code that computes emerging spectra and intensity maps. We derive from radiative hydrodynamic (RHD) simulations of RSG stars carried out with COBOLD (Freytag et al. 2002) observables expected for red supergiant stars (RSG) especially for interferometric observations, with emphasis on small scale structures. We show that the convection-related surface stru...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2014
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921315004937