Bubble Deep Field guide star photometry
- Author(s)
- Konstanze Zwintz, Rainer Kuschnig, Werner Wolfgang Weiss, Richard O. Gray, Helmut Jenkner
- Abstract
Since the advent of asteroseismology as a promising innovative tool for investigating internal stellar structure, numerous attempts to detect solar type oscillations in distant stars have been conducted. The three Fine Guidance Sensors of the Hubble Space Telescope can contribute to asteroseismology, but only after the data have been corrected for systematic effects, the South Atlantic Anomaly and terrestrial stray light being the most important. We have applied these corrections and obtained essentially photon noise-limited photometry for two guide stars used during the Hubble Deep Field program. Ground-based spectral classification has revealed that the brighter of the two guide stars is a solar-type star with a spectral type of G2mGOIV. Fine Guidance Sensor photometry for this star gives a noise level in the amplitude spectrum of only 23 ppm, which makes it a good candidate for detecting stochastically driven oscillations. We compare our result with theoretical predictions. The second guide star was classified as K1V and therefore is not a candidate for solar type oscillations.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Appalachian State University, Space Telescope Science Institute
- Journal
- Astronomy & Astrophysics
- Volume
- 343
- Pages
- 899-903
- No. of pages
- 5
- ISSN
- 0004-6361
- Publication date
- 1999
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/bubble-deep-field-guide-star-photometry(3d214cf1-7cc7-4b8b-b178-b423f375c760).html