Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption

Details Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12..349w&link_type=abstract

The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars , Stellar Systems, and the Sun (2001 July 30 - Augus

Astronomy and Astrophysics

Astrophysics

Α Cen, Ɛ Eri, Ɛ Ind, Λ And, Proxima Cen, 35 Oph, 40 Eri A, 61 Cyg A, Stellar Winds, Solar Wind

Scientific paper

We present a number of mass loss rate measurements for solar-like stars with coronal winds, computed using a Lyα absorption technique. The collision between the solar wind and the interstellar wind seen by the Sun defines the large scale structure of our heliosphere. Similar structures, ``astrospheres,'' exist around other solar-like stars. The deceleration of the interstellar wind at the solar or stellar bow shock heats the interstellar material. Heated neutral hydrogen in the outer astrosphere (and/or heliosphere) produces a broad Lyα absorption profile that is often detectable in high resolution Hubble Space Telescope spectra. The amount of absorption is dependent upon the strength of the stellar wind. With guidance from hydrodynamic models of astrospheres, we use detected astrospheric Lyα absorption to estimate the stellar mass loss rates. For the solar-like GK stars in our sample, mass loss appears to increase with stellar activity, suggesting that young, active stars have stronger winds than old, inactive stars. However, Proxima Cen (M5.5 Ve) and λ And (G8 IV-III+M V) appear to be inconsistent with this relation.

Affiliated with

Also associated with

No associations

Rating

Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass Loss Rates for Solar-like Stars Measured from Lyα Absorption will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-917006