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Brightest Stars in Galaxies as Distance Indicators

Published online by Cambridge University Press:  04 August 2017

Allan Sandage
Allan Sandage*
Affiliation:
Carnegie Institution of Washington, Department of Astronomy 813 Santa Barbara St., Pasadena, CA 91101-1292

Abstract

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The current status of the absolute magnitude calibration of the brightest blue and red supergiants in galaxies of different absolute magnitudes shows trends of M(star) with M(parent galaxy). Red supergiants show a more shallow correlation than the blue stars for galaxies brighter than MB = −14. For fainter galaxies, the red supergiant method appears to become totally degenerate.

Four areas of application of the brightest star data are discussed as (1) determining MB of the Eddington limit to be ∼−10 for blue supergiants, (2) calibration of MB(max) = −20.0±0.4 for type I supernovae, leading to a Hubble constant of HO = 43±10 km s−1 Mpc−1, (3) detection of the deceleration of the cosmological expansion by the Local Group leading to a Local Group mass of 4×1011 M⊙ and a mass-to-blue light ratio of 3, and (4) use of the brightest stars to map the Virgo cluster velocity perturbation of the Hubble flow.

Type
Session 1. Main Sequence and Supergiant Stars - I
Information
Symposium - International Astronomical Union , Volume 116: Luminous Stars and Associations in Galaxies , 1986 , pp. 31 - 41
Copyright
Copyright © Reidel 1986 

References

Arnett, W.D.: 1982, in Supernovae: A Survey of Current Research, eds. Rees, M. J. and Stoneham, R.J. (Doredrecht: Reidel), p. 221.Google Scholar
Branch, D.: 1982: A Survey of Current Research, eds. Rees, M.J. and Stoneham, R.J. (Dordrecht: Reidel), p. 267.CrossRefGoogle Scholar
Cadonau, R., Sandage, A., and Tammann, G.A.: 1985, in Lecture Notes in Physics, No. 224, ed. Bartel, N. (Berlin: Springer), p. 151.Google Scholar
Elias, J.H., Frogel, J.A., Hackwell, J.A., and Persson, S.E.: 1981, Ap. J. Letters, 251, L13.Google Scholar
Graham, J.A.: 1984, A.J., 89, 1332.Google Scholar
Greggio, L.: 1986, Astron. Astrophys., in press.Google Scholar
Holmberg, E.: 1950, Medd. Lunds Obs. Ser. 2, No. 128.Google Scholar
Hubble, E.: 1926, Ap. J., 64, 321.Google Scholar
Hubble, E.: 1936, Ap. J., 84, 270.CrossRefGoogle Scholar
Hubble, E., and Sandage, A.: 1953, Ap. J., 118, 353.Google Scholar
Kowal, C.T.: 1968, A.J., 73, 1021.Google Scholar
Kraan-Korteweg, R.: 1986, Astron. Astrophys., in press.Google Scholar
Öpik, E.: 1922, Ap. J., 55, 406.Google Scholar
Panagia, N.: 1985, in Lecture Notes in Physics No. 224, ed. Bartel, N. (Berlin: Springer), p. 14.Google Scholar
Sandage, A.: 1983a, in IAU Coll. No. 100, Kinematics, Dynamics, and Structure of the Milky Way, ed. Schuter, W.L.H. (Dordrecht: Reidel), p. 315.CrossRefGoogle Scholar
Sandage, A.: 1983b, A.J., 88, 1108.Google Scholar
Sandage, A.: 1984, A.J., 89, 621.Google Scholar
Sandage, A.: 1985a,b,c, A.J., 90, in press (October issue).Google Scholar
Sandage, A.: 1986, Ap. J., in press.Google Scholar
Sandage, A. and Carlson, G.: 1985a, A.J., 90, 1019.Google Scholar
Sandage, A. and Carlson, G.: 1985b, A.J., 90, 1464.Google Scholar
Sandage, A. and Tammann, G.A.: 1968, Ap. J., 151, 531.Google Scholar
Sandage, A. and Tammann, G.A.: 1974, Ap. J., 191, 603.CrossRefGoogle Scholar
Sandage, A. and Tammann, G.A.: 1981, in Astrophysical Cosmology, Proc. of the Study Week on Cosmology and Fundamental Physics, ed. Brück, H.A., Coyne, G.V., and Longair, M.S. (Rome: Specola Vaticana), p. 23.Google Scholar
Sandage, A. and Tammann, G.A.: 1982, Ap. J., 256, 339.Google Scholar
Stebbins, J., Whitford, A.E., and Johnson, H.L.: 1950, Ap. J., 112, 469.CrossRefGoogle Scholar
Sutherland, P.G. and Wheeler, J.C.: 1984, Ap. J., 280, 282.Google Scholar
Tammann, G.A.: 1978, Mem. Soc. Astron. Italiana, 49, 315.Google Scholar
Tammann, G.A., and Sandage, A.: 1968, Ap. J., 151, 825.CrossRefGoogle Scholar
Tonry, J.L. and Davis, M.: 1981, Ap. J., 246, 680.Google Scholar
Wheeler, J.C.: 1985, in Lecture Notes in Physics, No. 224, ed. Bartel, N. (Berlin: Springer), p. 34.Google Scholar