SIMBAD references

1999ApJ...526L..49S - Astrophys. J., 526, L49-L52 (1999/November-3)

Origin of the universal correlation between the flare temperature and the emission measure for solar and stellar flares.

SHIBATA K. and YOKOYAMA T.

Abstract (from CDS):

We present a theory to explain the observed universal correlation between flare temperature T and emission measure EM=n2V for solar and stellar flares (including solar microflares observed by Yohkoh as well as protostellar flares observed by ASCA), where n is the electron density and V is the volume. The theory is based on a magnetic reconnection model with heat conduction and chromospheric evaporation, assuming that the gas pressure of a flare loop is comparable to the magnetic pressure. This theory predicts the relation EM∝B–5T17/2, which explains well the observed correlation between EM and T in the range of 6x106 K < T<108 K and 1044<EM<1055 cm–3 from solar microflares to protostellar flares, if the magnetic field strength B of a flare loop is nearly constant for solar and stellar flares.

Abstract Copyright:

Journal keyword(s): Magnetohydrodynamics: MHD - Stars: Flare - X-Rays: Stars

Simbad objects: 4

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