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Title:
High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun
Authors:
White, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A.
Affiliation:
AA(Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA; Currently at University of Alabama, Huntsville, AL 35899, USA ), AB(Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA; Currently at University of Arizona, Tucson, AZ 85721, USA ), AC(Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA )
Publication:
The Astronomical Journal, Volume 133, Issue 6, pp. 2524-2536. (AJ Homepage)
Publication Date:
06/2007
Origin:
UCP
Astronomy Keywords:
stars: activity, stars: fundamental parameters, stars: pre-main sequence
DOI:
10.1086/514336
Bibliographic Code:
2007AJ....133.2524W

Abstract

We present high-dispersion (R~16,000) optical (3900-8700 Å) spectra of 390 stars obtained with the Palomar 60 inch telescope. The majority of stars observed are part of the Spitzer Legacy Science Program ``The Formation and Evolution of Planetary Systems.'' Through detailed analysis we determine stellar properties for this sample, including radial and rotational velocities, Li I λ6708 and Hα equivalent widths, the chromospheric activity index R'HK, and temperature- and gravity-sensitive line ratios. Several spectroscopic binaries are also identified. From our tabulations, we illustrate basic age- and rotation-related correlations among measured indices. One novel result is that Ca II chromospheric emission appears to saturate at vsini values above ~30 km s-1, similar to the well-established saturation of X-rays that originate in the spatially separate coronal region.
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