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2000AJ....120.1410T - Astron. J., 120, 1410-1425 (2000/September-0)
A new association of post-T Tauri stars near the sun.
TORRES C.A.O., DA SILVA L., QUAST G.R., DE LA REZA R. and JILINSKI E.
Abstract (from CDS):
We also observed three control regions, two at northern and southern Galactic latitudes and a third one in the known TW Hya association (TWA), and the properties and distribution of their young stars strengthen the reality of the HorA. Contrary to the TWA, the only known binaries in the HorA are two very wide systems. The HorA is much more isolated from clouds and older (∼30 Myr) than the TWA and could give some clues about the lifetime of the disks around T Tauri stars. Actually, none of the proposed members is an IRAS source indicating an advanced stage of the evolution of their primitive accreting disks.
Abstract Copyright: ∼
Journal keyword(s): open clusters and associations: individual (Horologium association) - Galaxy: Solar Neighborhood - Stars: Pre-Main-Sequence - X-Rays
Nomenclature: Table 1a: [TDQ2000] ERX NNW N=60 (Nos 1-55). Table 2: [TDQ2000] SRX NNW N=37 (Nos 1-33). Table 3: [TDQ2000] NRX NNW N=25 (Nos 1-23). Table 4: [TDQ2000] TRX NNW N=25 (Nos 1-23).
CDS comments: T.4 : OR Hya misprint for QR Hya, V572 Cen for V752 Cen
Simbad objects: 177
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