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Effective Temperature Scales of Red Giant Stars

  • David R. Alexander (a1), Jason W. Ferguson (a1), Robert F. Wing (a2), Hollis R. Johnson (a3), Peter H. Hauschildt (a1) and France Allard (a1)...

Abstract

We have completed a grid of spherically symmetric AGB star atmospheres using the state of the art spectral synthesis code PHOENIX. Models are constructed for stars with masses of 1 M and 1.5 M, spanning the range 10 to 3300 L in luminosity and 2500 to 5200 K in effective temperature. We find that grains of Al2O3 and CaTiO3 among other species form in atmospheres cooler than Teff = 3000 K. In the coolest models the grains cause a weakening of the TiO absorption features in the red and near infrared of up to 30% through both a depression of the continuum and a depletion of the TiO number abundance. We use spectrophotometric observations from a number of catalogs to determine effective temperature – spectral class and effective temperature – color relationships. We also compare synthetic colors calculated from our models with observations of M giants on Wing's 8-color narrow-band system of classification photometry.

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Copyright

Corresponding author

1 Now at CRAL, Ecole Normale Superieure, Lyon, 69364 France Cedex 07

References

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Allard, F., Hauschildt, P.H., 1995, ApJ 445, 433
Alexander, D.R., Allard, F., Tamani, A., Hauschildt, P.H., 1997, Ap&SS 251, 171
Aufdenberg, J.P., Hauschildt, P.H., Shore, S.N., 1998, ApJ 498, 837
Burnashev, V.I., 1982, Izv. Krymskoi Astro. Obs. 65, 94
Dominik, C., Sedlmayr, E., Gail, H.-P., 1993, A&A 277, 578
Fluks, M.A., Plez, B., The, P.S., De Winter, D., Westerlund, B.E., Steenman, H.C., 1994, A&AS 105, 311
Hauschildt, P.H., Allard, F., Baron, E., 1999, ApJ 512, 377
Hauschildt, P.H., Baron, E., 1998, J. Comp. App. Math., in press
Gustafsson, B., J⊘rgensen, U.G., 1994, A&A Rev. 6, 19
MacConnell, D.J., Wing, R.F., Costa, E., 1992, AJ 104, 821
Mathis, J.S., Rumpl, W., Nordsieck, K.H., 1977, ApJ 217,425
Ridgway, S.T., Joyce, R.R., White, N.M., Wing, R.F., 1980, ApJ 235, 126
Silva, D.R., Cornell, M.E., 1992, ApJ 81, 865
Smith, V.S., Lambert, D.L., 1990, ApJS 72, 387
Tsuji, T., 1998, in The Carbon Star Phenomenon , ed. Wing, R.F., IAU Symp. 177, Kluwer Academic Publishers, in press

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