NEW X-RAY-SELECTED PRE-MAIN-SEQUENCE MEMBERS OF THE SERPENS MOLECULAR CLOUD

Journal Article · Fri Nov 01 04:00:00 EDT 2013 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/146/5/105· OSTI ID:22273341

Oliveira, Isa ^[1]; Van der Laan, Margriet ^[2]

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1. McDonald Observatory, The University of Texas at Austin, 1 University Station, C1402, Austin, TX 78712 (United States)
2. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands)

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 optical spectra and optical/near-infrared photometry. Stellar masses and ages were derived based on pre-main-sequence 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 implications these similarities may have on the standard picture of disk evolution.

• OSTI ID: 22273341
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 5 Vol. 146; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION SPECTROSCOPY
ASTRONOMY
ASTROPHYSICS
LUMINOSITY
MAIN SEQUENCE STARS
MASS
MASS DISTRIBUTION
NEAR INFRARED RADIATION
PHOTOMETRY
PLANETS
PROTOPLANETS
STAR EVOLUTION
X RADIATION