New X-ray Selected Pre-Main Sequence Members of the Serpens Molecular Cloud
arXiv:1308.2967 · doi:10.1088/0004-6256/146/5/105
Abstract
The study of young stars no longer surrounded by disks can greatly add to our understanding of how protoplanetary disks evolve and planets form. We have used VLT/FLAMES optical spectroscopy to confirm the youth and membership of 19 new young diskless stars in the Serpens Molecular Cloud, identified at X-ray wavelengths. Spectral types, effective temperatures and stellar luminosities were determined using the optical spectra and optical/near-IR photometry. Stellar masses and ages were derived based on PMS evolutionary tracks. The results yield remarkable similarities for age and mass distribution between the diskless and disk-bearing stellar populations in Serpens. We discuss the important impli- cations these similarities may have on the standard picture of disk evolution.
Accepted for publication at the Astronomical Journal. 21 pages, 7 figures and 5 tables
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