The light and period changes of RT Andromedae

Details The light and period changes of RT Andromedae The light and period changes of RT Andromedae

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...379..878e&link_type=abstract

Astronomy and Astrophysics, v.379, p.878-883 (2001)

Astronomy and Astrophysics

Astrophysics

4

Stars: Binaries: Eclipsing, Stars: Individual: Rt And

Scientific paper

The nature of the long-term orbital period variation and the light level variation of RT And was studied based on all available photometric observations. The (O-C) diagram formed by all available times of eclipse minima could be either of a quasi-sinusoidal form superimposed on a parabolic form, or a long period sinusoidal form. The quasi-sinusoidal form with an amplitude of ~ 0.002 days and a period of ~ 65 years could be due to a cyclic magnetic activity modulation on the orbital period of the system. Applegate's theory (Applegate 1992), in this case, predicts an ~ 3 kG mean subsurface magnetic field for the primary component of the system. The parabolic form corresponds to a secular period decrease of about 3x 10-9 textit {m}sun yr-1 caused by mass loss from the system, and the long-period sinusoidal form with an amplitude of ~ 0.02 days and a period of ~ 105 years corresponds to a secular period change caused by the light-time effect due to an unseen third star in the system. It was estimated that the unseen third star should be a low mass (lower than 0.6 textit {m}sun) and faint ({ ~ }5fm fainter than the system RT And) star, whose detection is almost impossible. Future data will add information on the nature of the secular (O-C) variation. Secular light level variation of the system was found to be irregular and no correlation was detected with the orbital period variation.

Affiliated with

Also associated with

No associations

Rating

The light and period changes of RT Andromedae 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 light and period changes of RT Andromedae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The light and period changes of RT Andromedae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1227567