Title: KINEMATIC AGES OF CENTRAL STARS OF PLANETARY NEBULAE
Abstract:RESUMENABSTRACTThe age distribution of the central stars of planetary nebulae (CSPN) is es-timated using two methods based on their kinematic properties. First, theexpected rotation velocities of the ...RESUMENABSTRACTThe age distribution of the central stars of planetary nebulae (CSPN) is es-timated using two methods based on their kinematic properties. First, theexpected rotation velocities of the nebulae at their Galactocentric distancesare compared with the predicted values for the rotation curve, and the dif-ferences are attributed to the different ages of the evolved stars. Adoptingthe relation between the ages and the velocity dispersions determined by theGeneva-Copenhagen survey, the age distribution can be derived. Second, theU, V, W, velocity components of the stars are determined, and the corre-sponding age-velocity dispersion relations are used to infer the age distribu-tion. These methods have been applied to two samples of PN in the Galaxy.The results are similar for both samples, and show that the age distribution ofthe PN central stars concentrates in ages lower than 5 Gyr, peaking at about1 to 3 Gyr. Key Words: ISM: planetary nebulae: general — Stars: AGB and Post-AGB— Stars: general — Stars: fundamental parameters1. INTRODUCTIONPlanetary nebulae (PN) are evolved objects ejected by stars with mainsequence masses in the range of 0.8 and 8 MRead More
Publication Year: 2011
Publication Date: 2011-08-26
Language: en
Type: preprint
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot