Multi-dimensional models of circumstellar shells around evolved massive stars
نویسندگان
چکیده
منابع مشابه
Local Circumstellar Magnetic Fields around Evolved Stars
I argue that the presence of magnetic fields around evolved stars, e.g., asymptotic giant branch stars, and in PNe, does not necessarily imply that the magnetic field plays a global dynamical role in shaping the circumstellar envelope. Instead, I favor magnetic fields with small coherence lengths, which result from stellar magnetic spots or from jets blown by an accreting companion. Although th...
متن کاملYoung Circumstellar Disks near Evolved Massive Stars and Supernovae
There is increasing evidence that low mass stars with circumstellar disks can be born close to massive stars, in some cases within tenths of a pc. If the disks have lifetimes greater than those of the more massive stars, they are exposed to the radiation fields and gas flows from the late evolutionary phases and supernovae of the massive stars. The fast flows from supernovae are likely to give ...
متن کاملMid-infrared Interferometry of Dust around Massive Evolved Stars
We report long-baseline interferometric measurements of circumstellar dust aroundmassive evolved stars with the MIDI instrument on theVeryLarge Telescope Interferometer and provide spectrally dispersed visibilities in the 8Y13 m wavelength band. We also present diffraction-limited observations at 10.7 m on the Keck Telescope with baselines up to 8.7 m, which explore larger scale structure. We h...
متن کاملCircumstellar Molecular Spectra towards Evolved Stars
In this paper we discuss the relevance of, and possible scientific gains which can be acquired from studying circumstellar molecular spectra toward evolved stars. Where can we expect circumstellar molecular spectra, why would we want to study these spectra, which molecules might be present, and what can we learn from these studies? We present an overview of reported detections, and discuss some...
متن کاملBarotropic thin shells with linear EOS as models of stars and circumstellar shells in general relativity
The spherically symmetric thin shells of the barotropic fluids with the linear equation of state are considered within the frameworks of general relativity. We study several aspects of the shells as completely relativistic models of stars, first of all the neutron stars and white dwarfs, and circumstellar shells. The exact equations of motion of the shells are obtained. Also we calculate the pa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201218957