Surface magnetism in the pulsating RV Tauri star R Scuti
arXiv:2305.07849 · doi:10.1093/mnras/stad1210
Abstract
We present the surface magnetic field conditions of the brightest pulsating RV Tauri star, R Sct. Our investigation is based on the longest spectropolarimetric survey ever performed on this variable star. The analysis of high resolution spectra and circular polarization data give sharp information on the dynamics of the atmosphere and the surface magnetism, respectively. Our analysis shows that surface magnetic field can be detected at different phases along a pulsating cycle, and that it may be related to the presence of a radiative shock wave periodically emerging out of the photosphere and propagating throughout the stellar atmosphere.
arXiv comment16 pages, 14 figures
References in corpus (15)
- A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
- The Radial Velocity Experiment (RAVE): Fifth Data Release
- Atmospheric dynamics and the mass loss process in red supergiant stars
- (Sub)stellar companions shape the winds of evolved stars
- Stokes IQUV Magnetic Doppler Imaging of Ap stars I. ESPaDOnS and NARVAL Observations
- Near-infrared narrow-band photometry of M-giant and Mira stars: models meet observations
- First detection of surface magnetic fields in Post-AGB stars : the cases of U Monocerotis and R Scuti
- Measuring surface magnetic fields of red supergiant stars
- Evolution of the magnetic field of Betelgeuse from 2009 - 2017
- Discovery of a complex linearly polarized spectrum of Betelgeuse dominated by depolarization of the continuum
- The correct estimate of the probability of false detection of the matched filter in the detection of weak signals. II. (Further results with application to a set of ALMA and ATCA data)
- Rotationally resolved spectroscopy of (20000) Varuna in the near-infrared
- Asymmetric shocks in Cyg observed with linear spectropolarimetry
- Magnetic Fields in Paradigms of Planetary Nebulae and Related MHD Frontiers
- Determining rotational and macroturbulent velocities of cool magnetic giant stars