Bubble Deep Field guide star photometry

Autor(en)

Konstanze Zwintz, Rainer Kuschnig, Werner Wolfgang Weiss, Richard O. Gray, Helmut Jenkner

Abstrakt

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(en)

Institut für Astrophysik

Externe Organisation(en)

Appalachian State University, Space Telescope Science Institute

Journal

Astronomy & Astrophysics

Band

343

Seiten

899-903

Anzahl der Seiten

5

ISSN

0004-6361

Publikationsdatum

1999

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/bubble-deep-field-guide-star-photometry(3d214cf1-7cc7-4b8b-b178-b423f375c760).html