Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..652m&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 105, no. 2, p. 652-659.
Astronomy and Astrophysics
Astronomy
9
Binary Stars, Companion Stars, Image Motion Compensation, Infrared Imagery, Orbital Elements, Stellar Mass, Abundance, Heavy Elements, Milky Way Galaxy, Real Time Operation, Stellar Luminosity
Scientific paper
We have obtained the first direct images of the low mass companion to Mu Cas A using techniques for high speed correction of image motion at 1.25 and 1.65 micron. These techniques include real-time tracking of the brightest infrared speckle at 75 Hz and of the visible centroid at 500 Hz. Mu Cas B is easily detected with a magnitude difference relative to the primary of greater than 4 at a separation of about 1.4 arcsec. Its energy distribution from 0.55 to 3.4 microns yields an effective temperature (3034 +/- 160 K), stellar diameter (0.26 solar radius), and luminosity (0.0051 +/- 0.0011 solar luminosity). A direct mass measurement using two photocentric orbits yields 0.15 +/- 0.0013 solar mass. Significant improvements in these parameters can result from astrometric, spectroscopic, and imaging observations of the upcoming periastron passage.
Clampin Marc
Colucci D'nardo
Durrance Samuel
Freeman John J.
Golimowski Dave
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