chromospheric activity

chromospheric activity

(kroh-mŏ-sfe -rik) The collection of phenomena displayed by certain types of single and binary stars, including flare stars, RS Canum Venaticorum stars, and T Tauri stars. The phenomena are similar to but usually much more extreme than solar activity, and are thought to require rapid rotation and a deep convective outer envelope. They include mass loss in stellar winds, starspots, rapid solarlike flares, and long-term cycles of activity analogous to the solar cycle (see sunspot cycle).
References in periodicals archive ?
6 mag in the V band and interpreted as the rotationally modulated effect of cool spots on their surfaces, a result of increased chromospheric activity.
Among the topics are gravitational wave foreground radiation from neutron star-dwarf binaries, the chromospheric activity of late-type stars of the different rotational periods, spectrophotometry and model atmosphere flux fitting, the light-time effect and tertiary companions in close binary stars, the age of the local interstellar bubble, and the current status and outreach activities of radio astronomy in Malaysia.
As this binary has a spectral classification of G4V I suggest the dip in the light curve is due to chromospheric activity.
Analysis indicates that the star has chromospheric activity similar to stars in the Hyades Cluster, which is about 700 million years old.
Abstract: In a classic 1972 paper, Andrew Skumanich showed that stellar rotation decreases over time--as does chromospheric activity, a proxy for magnetic field strength.