SIMBAD references

2004PASP..116.1105W - Publ. Astron. Soc. Pac., 116, 1105-1110 (2004/December-0)

The χ factor: determining the strength of activity in low-mass dwarfs.


Abstract (from CDS):

We describe a new, distance-independent method for calculating the magnetic activity strength in low-mass dwarfs, L/Lbol. Using a well-observed sample of nearby stars and cool standards spanning spectral type M0.5 to L0, we compute χ, the ratio between the continuum flux near Hα and the bolometric flux, fλ6560/fbol. This ratio can be multiplied by the measured equivalent width of the Hα emission line to yield L/Lbol. We provide χ values for all objects in our sample, and also fits to χ as a function of color and average values by spectral type. This method was used by West et al. to examine trends in magnetic activity strength in low-mass stars.

Abstract Copyright:

Journal keyword(s): Stars: Late-Type - Stars: Low-Mass, Brown Dwarfs - Methods: Data Analysis

Simbad objects: 77

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