Coronagraphic Imaging of Nearby Stars
Coronagraphic Imaging of Nearby Stars 77kB
150kB
Coronagraphic Imaging of Nearby Stars
Comparison with Ground-based View
January 16, 1996
A. Schultz and H. Hart (CSC), HST FOS Imaging Team and NASA
Two nearby stars GJ1245AC (red dwarf binary system, distance ~14.8 light years) and GL293 (white dwarf, distance ~18.8 light years) have been imaged with the FOS/RD detector in ACQIMAGE mode.
The two components of the GJ1245AC binary system have been resolved in the FOS ACQIMAGE. The HST observation yields a separation of ~0.5 arcseconds between the two components with a position angle of 144 degrees. Comparison with the predicted orbit (Harrington 1990) shows the companion to be closer to the primary then expected, indicating a mass lower than the 0.085 solar mass estimate. In the right image, the companion is the bright area below the bar, while the faint area above the bar is the scattered light from the primary star.
No faint companion was found about Gl293.
GJ 1245 AC - FOS ACQIMAGE 32kB
58kB