The magnetic field and spectral variability of the He-weak star HR 2949

• Published in: arXiv.org
• Main Authors: Shultz, M, Rivinius, Th, Folsom, C P, Wade, G A, Townsend, R H D, Sikora, J, Grunhut, J, Stahl, O, the MiMeS Collaboration
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 13.04.2015
• Subjects: Abundance; Circular polarization; Companion stars; Empirical analysis; Line spectra; Magnetic dipoles; Magnetic fields; Magnetism; Magnetospheres; Mathematical analysis; Organic chemistry; Peculiar stars; Photometry; Photosphere; Physics - Solar and Stellar Astrophysics; Rare earth elements; Rotation; Stellar age; Stellar magnetic fields; Ultraviolet emission; Zeeman effect
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1504.03289

We analyze a high resolution spectropolarimetric dataset collected for the He-weak B3p IV star HR 2949. The Zeeman effect is visible in the circularly polarized component of numerous spectral lines. The longitudinal magnetic field varies between approximately \(-650\) and \(+150\) G. The polar stren...