Near-IR Stellar Spectra: Gravity and Metallicity-Sensitive Spectral Indices

Details Near-IR Stellar Spectra: Gravity and Metallicity-Sensitive Spectral Indices Near-IR Stellar Spectra: Gravity and Metallicity-Sensitive Spectral Indices

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..tsf.bb003d&link_type=abstract

American Physical Society, Texas Section Fall Meeting, October 4-6, 2001 Fort Worth, Texas Meeting ID: TSF01, abstract #BB.003

Physics

Scientific paper

A technique which can uniquely determine physical parameters of stars can provide insight into the nature of different unresolved stellar populations. For example, differences in chemical composition can be utilized as an age indicator. This project focuses on the utility of near-infrared spectral index measurements as diagnostics for independently characterizing the metallicity, gravity, and temperature of stars across the HR diagram. The goal is to identify those near-IR spectral lines whose strengths are dominated by either metallicity or gravity. The possibility of using combinations of spectral indices is explored in order to determine metallicity or gravity in cases for which both parameters are equaly dominant in a particular line.

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