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J/AZh/88/530        Dynamical study of ADS 12815             (Kiselev+, 2011)

Dynamical study of the wide visual binary ADS 12815 (16 Cyg). Kiselev A.A., Romanenko L.G. <Astron. Zh. 88, 530 (2011)> =2011AZh....88..530K =2011ARep...55..487K
ADC_Keywords: Stars, double and multiple Abstract: A homogeneous series of photographic position measurements of the visual binary ADS 12815 obtained on the 26-inch refractor of the Pulkovo Observatory (1960-2007) is analyzed. The Pulkovo observations allow for the existence of the planet around component B discovered by Cochran et al. (1997ApJ...483..457C) based on radial-velocity measurements. The orbit of the planet must be steeply inclined to the plane of the sky (i≥70°). Uniform series of position measurements obtained at the Dearborn Observatory, US Naval Observatory, and Pulkovo Observatory, the HIPPARCOS parallax, and the relative radial velocities obtained by Hauser andMarcy at the Lick Observatory are used to calculate the elements of possible orbits for the ADS 12815 stars using the apparent motion parameters method. The corresponding periods are more than 20000yr, the semi-major axes more than 900AU, and the eccentricities more than 0.65. All possible orbits are steeply inclined to the Galactic plane. The obtained family of orbits is in better agreement with observations than the family calculated by Hauser and Marcy. Description: Photographic observations of the visual binary ADS 12815 were carried out on the 26-inch refractor at the Pulkovo Observatory from 1960 through 2007; the resulting series contains 128 plates (36 yearly mean normal places). Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 19 41 48.9 +50 31 30 ADS 12815 = * 16 Cyg A 19 41 51.97 +50 31 03 ADS 12815 B = * 16 Cyg B --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 48 128 Relative positions of the ADS 12815 components from photographic observations on the 26-inch Pulkovo refractor
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 9 I5 --- Plate Plate number 11- 18 F8.3 yr Epoch Epoch 20- 25 F6.3 arcsec rho Relative distance ρ of component B relative to the primary A 27- 31 F5.3 arcsec e_rho rms uncertainty on rho 33- 39 F7.3 deg theta Position angle θ of B relative to A reduced to epoch 2000.0 41- 45 F5.3 deg e_theta rms uncertainty on theta 47- 48 I2 --- N Number of measured images
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Aug-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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