Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8254w&link_type=abstract
HST Proposal ID #8254
Astronomy and Astrophysics
Astronomy
Hst Proposal Id #8254 Hot Stars
Scientific paper
An improved understanding of the white dwarf stars has a great potential in both physics and astronomy. Determination of the basic physical parameters of the white dwarf stars will help us realize that potential; asteroseismology is the key. We can use asteroseismology to constrain the stellar structure and evolution, including the stellar mass and even the stellar distance if we can determine the pulsation indices {k, ell, m} of the non-radial g-mode light variations observed in compact pulsators. We made tentative identifications for GD 358 using a method based on the frequency distribution of consecutive radial overtone g-modes. A comparison of the amplitude of the pulsation between the optical and the UV proves to be another independent method to identify the pulsation indices. Our project is to apply both methods to GD358. We will measure the optical amplitude with ground-based time series photometry. By observing the DBV star GD 358 with the HST, we have a unique op portunity to cross-calibrate the t wo methods - essential if we are to have confidence in the conclusions drawn from either method. The future of asteroseismology of white dwarf stars hinges on these observations. We attempted this science previously with HST. The observations were successful, but GD358 had other ideas {See Justify Duplications section}. This exciting data set only adds to the importance of the proposed calibration observation.
No associations
LandOfFree
A Unique Calibration of Asteroseismology: the DBV GD358 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Unique Calibration of Asteroseismology: the DBV GD358, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Unique Calibration of Asteroseismology: the DBV GD358 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-992994