Abstract
The mean densities of roAp stars can be predicted from the fundamental spacings of their observed p-mode eigenspectra. Combined with mass estimates and effective temperatures from Strömgren photometry, seismic results yield luminosities which can be compared with those from Hipparcos parallaxes. The first such comparison (for a sample of 12 roAp stars) gives generally good agreement but astrometry finds systematically larger parallaxes than predicted by asteroseismology. One possible explanation is that roAp stars are cooler than expected. However, large discrepancies such as a Circini (which would have to be cooler by 1000K cannot be explained this way. Other more exotic ideas may be necessary.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Burstein, D., Heils, C. 1982, AJ 87, 1156
Dziembowski, W.A., Goode, P.R. 1996, ApJ, 458, 340
ESA 1997, The Hipparcos Catalogue, ESA SP-1200
Gabriel, M., Nods, A., Scuflaire, R., Mathys, G. 1985, A&A, 143, 206
Hanson, R.B. 1979, MNRAS, 186, 875
Heller, C.H., Kawaler, S.D. 1988, ApJ, 329, L43
Hubrig, S., Schwan, H. 1991, A&A, 251, 469
Kupka, F., Ryabchikova, T.A., Weiss, W.W., Kuschnig, R., Rogl, J., Mathys, G. 1996, A&A, 308, 886
Kurtz, D.W., Matthews, J.M., Martinez, P., Seeman, J., Cropper, M., Clemens, J.C., Kreidl, T.J., Sterken, C., Schneider, H., Weiss, W.W., Kawaler, S.D., Kepler, S.O., van der Peet, A., Sullivan, D.J., Wood, H.J. 1989, MNRAS, 240, 881
Lanz, T. 1984, A&A, 139, 161
Lutz, T.E., Kelker, D.H. 1973, PASP, 85, 573
Martinez, P. 1992, ASPC, 30, 371
Martinez, P. 1993, PhD Thesis, University of Cape Town
Matthews, J.M. 1987, PhD Thesis, University of Western Ontario
Matthews, J.M. 1988, MNRAS, 235, 7P
Matthews, J.M., Kurtz, D.W., Martinez, P. 1999, ApJ, 511, in press
Mégessier, C. 1988, A&A, 206, 74
Moon, T.T., Dworetsky, M.M. 1985, MNRAS, 217, 305
Perry, C.L., Johnston, L. 1982, ApJS, 50, 451
Reid, I.N. 1998, AJ, 115, 204
Shibahashi, H., Saio, H. 1985, PASJ, 37, 245
Tassoul M. 1980, ApJS, 43, 469
Tassoul M. 1990, ApJ, 358, 313
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Matthews, J. (2000). Asteroseismology Vs. Astrometry. In: İbanoğlu, C. (eds) Variable Stars as Essential Astrophysical Tools. NATO Science Series, vol 544. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4299-1_16
Download citation
DOI: https://doi.org/10.1007/978-94-011-4299-1_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-6084-1
Online ISBN: 978-94-011-4299-1
eBook Packages: Springer Book Archive