Coronal Evaporation as a Possible Mechanism for Mass Loss in Red Giants.

Abstract

view Abstract Citations (55) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Coronal Evaporation as a Possible Mechanism for Mass Loss in Red Giants. Weymann, Ray Abstract The consequences ot the possible existence of a corona of a red giant are investigated from a hydrodynamic p ] of view, under the assumption that depdsition 6f mechanical energy is confined to a narrow layer just above the surface of the star. Because of tbe energy losses due to radiation, steady sub- sonic flows do not exist, and only under special circumstances can hydrostatic solutions exist. In contrast, steady supersonic flows can exist, and tbe mass loss accompanying them would be significant from an eyolutionary point of view. However, investigation of the observational consequences of such fl6ws rules them `out because of the expected presence of lines displaced toward much higher velocities ihan those actually observed. Other possible models for mass .ejection are briefly discussed. Publication: The Astrophysical Journal Pub Date: September 1960 DOI: 10.1086/146937 Bibcode: 1960ApJ...132..380W full text sources ADS |