Low-mass young stars in Cep OB2: Ages, distribution and accretion disks

Aurora Sicilia-Aguilar (Lead / Corresponding author), Lee Hartmann, Cesar Briceno, Maria. E. Contreras, James Muzerolle, Nuria Calvet

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Abstract

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 similar to 70 members in Tr37 and similar to 20 in NGC7160, confirming age estimates of 3 and 10 Myr respectively. Accretion rates are similar to 10(-8)M(.) 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.
Original languageEnglish
Pages (from-to)457-463
Number of pages7
JournalAstrophysics and Space Science
Volume292
Issue number1-4
DOIs
Publication statusPublished - Jul 2004

Keywords

  • T Tauri stars accretion disks disk evolution protoplanetary disk planet formation star formation CEPHEUS BUBBLE EVOLUTION KINEMATICS

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