Contributions to the NStars Program: Spectroscopy and Physical Parameters of the Solar-type Stars within 40 parsecs of the Sun.

Details Contributions to the NStars Program: Spectroscopy and Physical Parameters of the Solar-type Stars within 40 parsecs of the Sun. Contributions to the NStars Program: Spectroscopy and Physical Parameters of the Solar-type Stars within 40 parsecs of the Sun.

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.4303g&link_type=abstract

American Astronomical Society Meeting 203, #43.03; Bulletin of the American Astronomical Society, Vol. 35, p.1273

Astronomy and Astrophysics

Astronomy

Scientific paper

During the past three years, Appalachian State University, the Vatican Observatory and the David Dunlap Observatory have been engaged in a Nearby Stars (NStars) project to obtain spectra of all dwarf and giant stars earlier than M0 within 40 parsecs of the Sun (3600 stars). This observational program is now 98% complete, and we have turned our full attention to the analysis of these spectra. We are using these spectra to provide new, precise spectral types and basic physical parameters (Teff, log g and [M/H]). In addition we are providing measures of the chromospheric activity of these stars. This poster will discuss recent results of this program, including the basic physical parameters of stars with exoplanets, the discovery of stars with high levels of chromospheric activity, a refinement of the stellar census within 40 parsecs of the Sun and the possible presence of a significant population of ``Maunder Minimum'' dwarfs in the solar neighborhood. Observed and derived data from this project are being released on the project's website.

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