Low-Mass Young Stars in Cep OB2: Ages, Distribution and Accretion Disks

Details Low-Mass Young Stars in Cep OB2: Ages, Distribution and Accretion Disks Low-Mass Young Stars in Cep OB2: Ages, Distribution and Accretion Disks

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.292..457s&link_type=abstract

Astrophysics and Space Science, v. 292, Issue 1, p. 457-463 (2004).

Astronomy and Astrophysics

Astrophysics

2

T Tauri Stars, Accretion Disks, Disk Evolution, Protoplanetary Disk, Planet Formation, Star Formation

Scientific paper

We are studying the young clusters Tr37 and NGC7160 in the Cep OB2 region as part of a program to understand the evolution of accretion disks at the ages of disk dissipation and planet formation. Here, we present the first identifications of low mass (spectral types K-M) members of the clusters and study the presence and characteristics of their accretion disks, finding evidences of disk evolution. Using optical photometry and spectroscopy, we have identified ˜70 members in Tr37 and ˜20 in NGC7160, confirming age estimates of 3 and 10 Myr respectively. Accretion rates are ˜10-8 M &sun;yr-1 in Tr37. We have not found any accreting members in NGC7160, suggesting that disk accretion generally ends before the age of 10 Myr, which is consistent with the results from other populations.

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