Stellar atmospheric parameters for the giant stars MU Pegasi and lambda Pegasi

Details Stellar atmospheric parameters for the giant stars MU Pegasi and lambda Pegasi Stellar atmospheric parameters for the giant stars MU Pegasi and lambda Pegasi

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...339..531s&link_type=abstract

Astronomy and Astrophysics, v.339, p.531-536 (1998)

Astronomy and Astrophysics

Astrophysics

4

Stars: Fundamental Parameters, Stars: Individual: Mu Peg, Stars: Individual: Lambda Peg

Scientific paper

Profiles of the strong lines Ca II 8542 Angstroms, and Mg I 8806 Angstroms, together with regions containing Ca I, Fe I and Fe II lines in the spectra of the G8 giant stars mu Peg and lambda Peg have been recorded at high resolution and with signal/noise >= 100. The wings of the strong lines and the full profiles of intermediate strength lines are consistent with an LTE analysis based on the following sets of atmospheric parameters: star name star name mu Peg lambda Peg T_eff (K) 5000 \pm 50 4800 \pm 50 \log g (g in cm s^{-2}) 2.6 \pm 0.1 1.7 \pm 0.1 [M/H] -0.1 \pm 0.05 -0.1 \pm 0.05 Microturbulence, \xi(km s^{-1}) 1.4 \pm 0.1 1.8 \pm 0.2 Macroturbulence, \zeta(km s^{-1}) 3.00 \pm 0.13 7.6 \pm 0.5$ These results, together with Hipparcos parallaxes and recently published photometry, lead to estimates of luminosity, mass and radius. Inferred angular diameters are consistent with a well established empirical relationship but disagree with direct measurements by an interferometric technique.

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