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.
@article{arxiv.1308.2967,
title = {New X-ray Selected Pre-Main Sequence Members of the Serpens Molecular Cloud},
author = {Isa Oliveira and Margriet van der Laan and Joanna M. Brown},
journal= {arXiv preprint arXiv:1308.2967},
year = {2015}
}
Comments
Accepted for publication at the Astronomical Journal. 21 pages, 7 figures and 5 tables