Evidence for Early Circumstellar Disk Evolution in NGC 2068/71

Abstract

We study the disk and accretion properties of young stars in the NGC 2068 and NGC 2071 clusters. Using low-resolution optical spectra, we define a membership sample and determine an age for the region of ~2 Myr. Using high-resolution spectra of the H-alpha line we study the accretion activity of these likely members and also examine the disk properties of the likely members using IRAC and MIPS mid-infrared photometry. A substantial fraction (79%) of the 67 members have an infrared excess while all of the stars with significant infrared excess show evidence for active accretion. We find three populations of evolved disks (IRAC-weak, MIPS-weak and transition disks) all of which show decreased accretion activity in addition to the evidence for evolution in the dust disk.

44 pages (20 pages of text), 16 figures, 5 tables

References in corpus (2)

• A Combined Spitzer and Chandra Survey of Young Stellar Objects in the Serpens Cloud Core
• Debris Disks in NGC 2547

Cited by in corpus (4)

• Evolution of Migrating Planets Undergoing Gas Accretion
• A Spectroscopic Study of Young Stellar Objects in the Serpens Cloud Core and NGC 1333
• MBM 12: young protoplanetary discs at high galactic latitude
• Chandra and Spitzer Imaging of the Infrared Cluster in NGC 2071