Search for dark companions of K and M giants - Preliminary results for Alpha BooPreliminary results are presented for Alpha Boo, encompassing selected measurements during the period from January 1979 to June 1984. Four groups of data are chosen, each group taken within an interval of up to 1.5 months, and examined the internal consistency of each set to look for short term trends. The radial velocity was found to be very consistent with a standard deviation of about + or - 50 m/s within time scales of hours, days, and weeks. No significant radial velocity changes over these periods were detected. This suggests that the stellar surface activity is confined to the level of uncertainty. Because of this consistency it was possible to take the means of the radial velocity measurements within each group and compare them to look for possible long term changes. Variations of the radial velocity of about 200 m/s were found over the span of a few years, significant at the 6 to 8 sigma level.
Document ID
19880033060
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Heyer, I. (Hawaii Univ. Honolulu, HI, United States)
Hall, D. N. B. (Hawaii, University Honolulu, United States)
Hinkle, K. (Kitt Peak National Observatory Tucson, AZ, United States)