Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1808h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, Nov. 1991, p. 1808-1812.
Astronomy and Astrophysics
Astronomy
11
Starspots, Stellar Spectrophotometry, K Stars, Orbital Elements, Radial Velocity, Stellar Rotation
Scientific paper
All available radial-velocity measures, published and unpublished, yield an improved period and a new (assumed circular) solution. The period is 53.58 d +/- 0.02 d, and conjunction (K1 giant in front) was at 2 444 325.93 +/- 0.12 d. Eleven years of V-band photometry, published and unpublished, between 1978-1979 and 1989-1990 are analyzed. Eighteen data groups are fit with a two-spot light-curve-modeling technique. Six spots existing sometime during the 11 years are identified, and the 4-percent range of their rotation periods is used to estimate a differential rotation coefficient of k = 0.08 +/- 0.02. Observed lifetimes of those six spots are consistent with times calculated on the assumption that large spots are disrupted by the shear of differential rotation. The two best observed spots each lasted about five years.
Barksdale William S.
Fekel Francis C.
Hall Douglas S.
Henry Gregory W.
No associations
LandOfFree
The 11 year history of starspots on V1149 ORI = HD 37824 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 The 11 year history of starspots on V1149 ORI = HD 37824, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 11 year history of starspots on V1149 ORI = HD 37824 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1716673