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27 papers · 1 filter
The RINGS Survey I: Halpha and HI Velocity Maps of Galaxy NGC 2280
Carl J. Mitchell, T. B. Williams, Kristine Spekkens +3
Precise measurements of gas kinematics in the disk of a spiral galaxy can be used to estimate its mass distribution. The Southern African Large Telescope (SALT) has a large collect…
The Magnetic Fields at the Surface of Active Single G-K Giants
M. Aurière, R. Konstantinova-Antova, C. Charbonnel +15
We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. We use the spectropolar…
Magnetic fields of Be stars: preliminary results from a hybrid analysis of the MiMeS sample
G. A. Wade, V. Petit, J. Grunhut +1
In the context of the MiMeS survey of magnetism in massive stars, 85 classical Be stars were observed in circular polarization with the aim of detecting magnetic fields at their su…
The surface magnetic field and chemical abundance distributions of the B2V helium-strong star HD184927
I. Yakunin, G. Wade, D. Bohlender +8
A new time series of high-resolution Stokes I and V spectra of the magnetic B2V star HD 184927 has been obtained in the context of the Magnetism in Massive Stars (MiMeS) Large Prog…
The MiMeS Survey of Magnetism in Massive Stars: CNO surface abundances of Galactic O stars
F. Martins, A. Hervé, J. -C. Bouret +7
The evolution of massive stars is still partly unconstrained. Mass, metallicity, mass loss and rotation are the main drivers of stellar evolution. Binarity and magnetic field may a…
First detection of surface magnetic fields in Post-AGB stars : the cases of U Monocerotis and R Scuti
L. Sabin, G. A. Wade, A. Lèbre
While several observational investigations have revealed the presence of magnetic fields in the circumstellar envelopes, jets and outflows of post-Asymptotic Giant Branch stars (PA…