Hostname: page-component-848d4c4894-x5gtn Total loading time: 0 Render date: 2024-05-29T02:33:50.250Z Has data issue: false hasContentIssue false
  • English
  • Français

A Search for Non-Radial Oscillations on Late-Type Stars

Published online by Cambridge University Press:  25 April 2016

P. D. Edmonds  and
L. E. Cram
P. D. Edmonds
Affiliation:
School of Physics, University of Sydney
L. E. Cram
Affiliation:
School of Physics, University of Sydney
Get access Rights & Permissions [Opens in a new window]

Abstract

The detection of non-radial oscillations on late-type dwarf stars may require the measurement of Doppler shifts of order 10 cm s−1. We report observations using the coudé echelle spectrograph of the 3.9 m Anglo-Australian Telescope which reveal a noise level in a 1 minute integration about a factor of one hundred greater than this. We then discuss a method of imposing a set of stable reference features on stellar spectra to permit Doppler measurements of the required accuracy. The method exploits a voltage-tuned solid Fabry-Perot interferometer whose passbands are fixed by a servo-control system to the light from a HeNe laser whose frequency is polarization-stablized. The desired wavelength stability demands careful control of the voltage, temperature and tilt of the etalon.

Type
Stellar
Information
Publications of the Astronomical Society of Australia , Volume 8 , Issue 2 , 1989 , pp. 154 - 157
Copyright
Copyright © Astronomical Society of Australia 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boies, M., Duncan, D. and Rust, M., 1987, Space Physics Group, preprint.Google Scholar
Born, M. and Wolf, E., 1965, Principles of optics, Pergamon Press.Google Scholar
Burton, C., Leistner, A., and Rust, D., 1987, Appi. Optics, 26, 2637.CrossRefGoogle Scholar
Ciddor, P. E. and Duffy, R. M., 1983, J. Phys. E., 16, 1223.CrossRefGoogle Scholar
Connes, P., 1985, Astrophys. Space Sci., 110, 211.CrossRefGoogle Scholar
Deubner, F. L. and Gough, D. O., 1984, Ann. Rev. Astron. Astrophys, 22, 593.CrossRefGoogle Scholar
Frandsen, S., 1987, Astron. Astrophys, 181, 289.Google Scholar
Gelly, G., Grec, G. and Fossat, E., 1984, Astron, and Astrophys, 164, 383.Google Scholar
Harvey, J., 1987, IAU Symposium, 123.Google Scholar
Heacox, W. D., 1986, Astron. J., 92, 219.CrossRefGoogle Scholar
Libbrecht, K. G., 1988, The impact of very high s/n spectroscopy on stellar physics, IAU Symposium No. 132, 83.CrossRefGoogle Scholar
Merline, W. J., 1984, Stellar radial velocities, IAU Colloquium, 87.CrossRefGoogle Scholar
Noyes, R. W., Baluinas, S. L., Belserene, E., Duncan, D. K., Horne, J. and Widrow, L., 1984, Astrophys. J., 285, L23.CrossRefGoogle Scholar
Rust, D., Burton, C. and Leistner, A., 1986, SPIE, 627, 39.Google Scholar
Walker, D. and Diego, F., 1985, Mon. Not. R. Astron. Soc., 217, 355.CrossRefGoogle Scholar