Discovery of a magnetic field in $\rho$ Pup

C. Neiner; G. A. Wade; J. Sikora

doi:10.1093/mnrasl/slx023

Discovery of a magnetic field in $\rho$ Pup

Solar and Stellar Astrophysics 2017-07-26 v1

Authors: C. Neiner , G. A. Wade , J. Sikora

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Abstract

$\rho$ Pup is a $\delta$ Scuti F2 pulsator, known to host a main radial mode as well as non-radial pulsations, with chemical peculiarities typical of evolved Am stars. We present high-precision spectropolarimetric observations of this star, obtained with ESPaDOnS at the Canada France Hawaii Telescope (CFHT) in the frame of the BRITE spectropolarimetric survey. A magnetic field is clearly detected in $\rho$ Pup, with a longitudinal field strength below 1 G. This makes $\rho$ Pup the second known magnetic $\delta$ Scuti discovered, after HD 188774, and a possible cool evolved counterpart of the recently discovered ultra-weakly magnetic Am family.

Keywords

magnetic field delta Scuti stars spectropolarimetry stellar magnetism Am stars pulsating variables

Cite

@article{arxiv.1702.01621,
  title  = {Discovery of a magnetic field in $\rho$ Pup},
  author = {C. Neiner and G. A. Wade and J. Sikora},
  journal= {arXiv preprint arXiv:1702.01621},
  year   = {2017}
}

Comments

4 pages, 2 figures, accepted in MNRAS Letters

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