The Magnetic Binary GJ 65: A Test of Magnetic Diffusivity Effects

GJ 65 is an M dwarf binary system consisting of the two flare stars BL Cet (GJ 65A) and UV Cet (GJ 65B). Two teams of investigators have recently reported total magnetic fluxes corresponding to fields of 4.5 and 5.2 kG for GJ 65A and 5.8 and 6.7 kG for GJ 65B: for each component, the magnetic result...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2018-06, Vol.860 (1), p.15
Main Authors: MacDonald, James, Mullan, D. J., Dieterich, Sergio
Format: Article
Language:English
Subjects:
Astronomical models
Astrophysics
binaries: visual
Binary stars
Electrical conductivity
Electrical resistivity
Flare stars
Magnetic flux
stars: individual (GJ 65A, GJ 65B)
stars: low-mass
stars: magnetic field
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:GJ 65 is an M dwarf binary system consisting of the two flare stars BL Cet (GJ 65A) and UV Cet (GJ 65B). Two teams of investigators have recently reported total magnetic fluxes corresponding to fields of 4.5 and 5.2 kG for GJ 65A and 5.8 and 6.7 kG for GJ 65B: for each component, the magnetic results obtained by the two teams agree with each other to within 1 . For the first time, we can directly compare the predictions of our magneto-convective models, based on fitting observed stellar parameters, with measured field strengths. We find that our models agree with the observed field strengths, provided the effects of finite conductivity are accounted for. Thus, GJ 65 provides us with an opportunity to use observations of field strengths to distinguish between the predictions of our models that assume perfect electrical conductivity and those that allow for finite conductivity.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aac2c0