The magnetic field on the late-type dwarf XI Bootis A

Abstract

view Abstract Citations (33) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The magnetic field on the late-type dwarf xi* Boo A. Marcy, G. W. Abstract An attempt is made to detect Zeeman splitting in five high resolution, high signal-to-noise spectra of a magnetically sensitive line in Xi Bootis A, through a comparison of this line with a magnetically insensitive one. No convincing evidence for the existence of magnetic fields on Xi Boo A results, in contrast to the previous detection by means of a similar technique of 2650 gauss, 20-45% surface area fields. The possibility of a variable magnetic field on Xi Boo A is supported by measurements of chromospheric and coronal diagnostics, all of which fluctuate with time. A comparison between active regions of Xi Boo A and those of the sun is drawn, indicating the possibility of significant differences between the two. Publication: The Astrophysical Journal Pub Date: April 1981 DOI: 10.1086/158838 Bibcode: 1981ApJ...245..624M Keywords: Dwarf Stars; Late Stars; Stellar Magnetic Fields; Zeeman Effect; Noise Spectra; Rotating Bodies; Signal To Noise Ratios; Solar Activity; Spectrum Analysis; Astronomy full text sources ADS | data products SIMBAD (2)