SIMBAD references

2020MNRAS.494.5682S - Mon. Not. R. Astron. Soc., 494, 5682-5703 (2020/June-1)

A magnetic snapshot survey of F-type stars.

SEACH J.M., MARSDEN S.C., CARTER B.D., NEINER C., FOLSOM C.P., MENGEL M.W., OKSALA M.E. and BUYSSCHAERT B.

Abstract (from CDS):

We present a spectropolarimetric magnetic snapshot survey of 55 stars which includes 53 F-type stars ranging from spectral types F0 to F9 plus 2 chemically peculiar stars β CrB, and δ Cap. We look for magnetic fields in stars spanning a range of effective temperatures where the transition from fossil to dynamo magnetic fields is believed to occur. High-resolution spectropolarimetry using circularly polarized spectra is used to look for a magnetic detection in the Stokes V profile, determine the mean longitudinal magnetic field (Bl), and to look for correlations with stellar parameters. Surface magnetic fields are detected on 14 F-stars, and present in every spectral class from F3V-F9V ranging in strength from 0.3 ± 0.1 G (36 UMa, F8V) to 8.3 ± 0.9 G (h Dra, F8V). Thus we find photospheric magnetic fields are present in stars as early as spectral type F3V with an outer convection zone thickness less than a few per cent of the stellar radius.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: early-type - stars: late-type - stars: magnetic field

Simbad objects: 71

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2021.02.24-19:28:47

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