SIMBAD references

2014ApJ...781L..33W - Astrophys. J., 781, L33 (2014/February-1)

Evidence for a weak wind from the young Sun.

WOOD B.E., MULLER H.-R., REDFIELD S. and EDELMAN E.

Abstract (from CDS):

The early history of the solar wind has remained largely a mystery due to the difficulty of detecting winds around young stars that can serve as analogs for the young Sun. Here we report on the detection of a wind from the 500 Myr old solar analog π1 UMa (G1.5 V), using spectroscopic observations from the Hubble Space Telescope. We detect H I Lyα absorption from the interaction region between the stellar wind and interstellar medium, i.e., the stellar astrosphere. With the assistance of hydrodynamic models of the π1 UMa astrosphere, we infer a wind only half as strong as the solar wind for this star. This suggests that the Sun and solar-like stars do not have particularly strong coronal winds in their youth.

Abstract Copyright:

Journal keyword(s): circumstellar matter - stars: winds, outflows - ultraviolet: stars

Simbad objects: 21

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2019.09.16-17:18:38

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