RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System?

Details RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System? RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System?

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pasj...60...77q&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.60, No.1, pp.77--83

Astronomy and Astrophysics

Astronomy

5

Stars: Binaries: Close, Stars: Binaries : Eclipsing, Stars: Individual (Rt Leonis Minoris)

Scientific paper

New photometric observations and analyses of the W UMa-type binary system RT Leonis Minoris are presented. A period study with our four times of light minimum, including other eclipse times from the literature, suggests that the orbital period of the binary star is variable. The O-C curve can be explained as a cyclic variation with an amplitude of 0.0049d and a period of 46.7yr. Photometric solutions were derived by using the 2003 version of the Wilson-Devinney method (1971, ApJ, 166, 605), and absolute parameters of the system were determined. The results indicate that RT LMi is an ambiguous W UMa-type overcontact system for the following reasons: (i) the depths of both minima are nearly equal, which makes it very difficult to distinguish whether it belongs to an A- or W-type system; (ii) the primary minima in Hoffmann's light curves are an occultation, indicating a W-type system, while the primary minimum in our light curve is a transit, suggesting an A-type light variation; and (iii) though our light curve shows an A-type variation, the photometric solutions indicate a higher secondary temperature of T2= 6513K (T1= 6400K), making the binary system, surprisingly, of W-type. These may indicate that Binnendijk's classification based on the shape of the light curve cannot reveal the physical properties of W UMa-type binary stars of this kind.

Affiliated with

Also associated with

No associations

Rating

RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System? 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 RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RT Leonis Minoris: Does It Belong to an A- or W-Type Overcontact Binary System? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1528930