Mathematics – Logic
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8396b&link_type=abstract
HST Proposal ID #8396
Mathematics
Logic
Hst Proposal Id #8396 Sakurai S Novalike Object: Real-Time Monitoring Of
Scientific paper
We recently used WFPC2 images of Procyon A and B to measure an extremely accurate separation of the bright F star and its much fainter white-dwarf companion. Combined with ground-based astrometry of the bright star, our observation significantly revises downward the derived masses, and brings Procyon A into excellent agreement with theoretical evolutionary tracks for the first time. We now propose to begin a modest but long-term program of WFPC2 measurements of astrophysically important visual binaries, working in a regime of large magnitude differences and/or faint stars where ground-based speckle interferometry cannot compete. We have selected three systems: Procyon {P=40 yr}, for which continued monitoring will even further refine the very accurate masses; Mu Cas {P=21 yr}, a famous metal-deficient G dwarf for which accurate masses will lead to the star's helium content with cosmological implications; and G 107-70, a close double white dwarf {P=18 yr} that promises to add two accurate masses to the tiny handful of white-dwarf masses that are directly known from dynamical measurements.
No associations
LandOfFree
WFPC2 Observations of Astrophysically Important Visual Binaries - Continued 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 WFPC2 Observations of Astrophysically Important Visual Binaries - Continued, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and WFPC2 Observations of Astrophysically Important Visual Binaries - Continued will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-993484