Digitale Medien
Palo Alto, Calif.
:
Annual Reviews
Annual Review of Astronomy and Astrophysics
42 (2004), S. 685-721
ISSN:
0066-4146
Quelle:
Annual Reviews Electronic Back Volume Collection 1932-2001ff
Thema:
Physik
Notizen:
Until the late 1990s the rich Hyades and the sparse UMa clusters were the only coeval, comoving concentrations of stars known within 60 pc of Earth. Both are hundreds of millions of years old. Then beginning in the late 1990s the TW Hydrae Association, the Tucana/Horologium Association, the beta Pictoris Moving Group, and the AB Doradus Moving Group were identified within ~60 pc of Earth, and the eta Chamaeleontis cluster was found at 97 pc. These young groups (ages 8-50 Myr), along with other nearby, young stars, will enable imaging and spectroscopic studies of the origin and early evolution of planetary systems.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1146/annurev.astro.42.053102.134111
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