Evidence for Early Circumstellar Disk Evolution in NGC 2068-71 - AstrophysicsReport as inadecuate

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Abstract: We study the disk and accretion properties of young stars in the NGC 2068 andNGC 2071 clusters. Using low-resolution optical spectra, we define a membershipsample and determine an age for the region of ~2 Myr. Using high-resolutionspectra of the H-alpha line we study the accretion activity of these likelymembers and also examine the disk properties of the likely members using IRACand MIPS mid-infrared photometry. A substantial fraction 79% of the 67members have an infrared excess while all of the stars with significantinfrared excess show evidence for active accretion. We find three populationsof evolved disks IRAC-weak, MIPS-weak and transition disks all of which showdecreased accretion activity in addition to the evidence for evolution in thedust disk.

Author: K.M. Flaherty 1, J. Muzerolle 1 1 Steward Observatory, University of Arizona

Source: https://arxiv.org/


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