Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..119s&link_type=abstract
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he
Astronomy and Astrophysics
Astrophysics
Scientific paper
1. The main purpose of our work was the investigation of the dynamics of two binaries, also we wish to define the masses of the components. After all the great interest was to search the existence a hidden mass or gravitational influence of probable dark satellites. 2. Our data have been founded on homogeneous long term series of photographic observations by means of Pulkovo observatory 65 cm refractor: 196 positions with m.e. 0".004 for ADS 7251 and 106 positions with m.e. 0".020 for Delta Gem obtained in 1962-1996 and 1972-2006 years respectively. All observations of Delta Gem have been made with difractional grating because two its components have difference in magnitudes about 5 mag. 3. For ADS 7251 the relative orbit, the total mass and the mass ratio have been obtained. Taking into account some contradictory data on masses and spectral classes of its components some discussion has been fulfilled. In the result of investigation of the individual moving of its components in the frame of reference stars the mass of A and B have been estimated. We were using different algorithms for the estimations of masses. As result we have obtained the total mass and masses of components of ADS 7251. They are 0.56 and 0.54 of solar masses for A and B respectively. The relative orbit for Delta Gem has been obtained too with total mass 2.5 solar masses. 4. Any perturbations in the separation and position angles of ADS 7251 have not been discovered. The residuals in the moving of Delta Gem are complicated character. In its separations the wave with the period of 6.1 year is revealed. The motion of dark companion with mass about 0.2 solar masses is analysed, some hypothesis on the other companion with the period about 1 year has been discussed.
Gorshanov Denis L.
Grosheva E. A.
Shakht Natalia A.
No associations
LandOfFree
Determination of the orbits and the estimation of the masses of ADS 7251 and ADS 5983 (Delta Gem) 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 Determination of the orbits and the estimation of the masses of ADS 7251 and ADS 5983 (Delta Gem), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the orbits and the estimation of the masses of ADS 7251 and ADS 5983 (Delta Gem) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-975613