Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.0608c&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #06.08; Bulletin of the American Astronomical Society, Vol. 26, p.868
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The McDonald Observatory Planetary Search program has been obtaining high precision (sigma ~ 10ms(-1) ) observations of a sample of 36 slowly rotating F, G, and K dwarfs since the fall of 1987. The primary purpose of this survey has been to detect sub-stellar companions to these stars. Most of the survey stars seem to have a level of intrinsic stellar radial velocity variability of about 20ms(-1) or less. However, the four stars of type F6 and earlier all seem to show significantly larger intrinsic variability of 40ms(-1) or more. These stars are pi (3) Orionis (F6V), alpha Canis Minoris A (F5IV-V), theta Ursae Majoris, and gamma Serpens. Stars of spectral type F8 and later do not seem to show this large level of radial velocity variability. One star of type F7V has recently been added to the survey, but we do not yet have sufficient data on it to determine its level of intrinsic variability. We present the observational data on these variable mid-F dwarfs, along with statistical analysis of the data in order to determine possible periodicities within the data. It is possible that these stars may represent the extreme ``tail end'' of the cool delta Scuti stars, or they may be a new class of variable stars in their own right.
Cochran William D.
Hatzes Artie P.
No associations
LandOfFree
Radial Velocity Variability of mid-F Dwarf Stars 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 Radial Velocity Variability of mid-F Dwarf Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radial Velocity Variability of mid-F Dwarf Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-880874