J/ApJ/629/507 Observed orbital eccentricities for 391 binaries (Abt+, 2005)
Observed orbital eccentricities. Abt H.A. <Astrophys. J., 629, 507-511 (2005)> =2005ApJ...629..507A
ADC_Keywords: Stars, double and multiple ; Binaries, spectroscopic Keywords: binaries: spectroscopic - binaries: visual - stellar dynamics Abstract: For 391 spectroscopic and visual binaries with known orbital elements and having B0-F0 IV or V primaries, we collected the derived eccentricities. As has been found by others, those binaries with periods of a few days have been circularized. However, those with periods up to about 1000 or more days show reduced eccentricities that asymptotically approach a mean value of 0.5 for the longest periods. For those binaries with periods greater than 1000 days their distribution of eccentricities is flat from 0 to nearly 1, indicating that in the formation of binaries there is no preferential eccentricity. The binaries with intermediate periods (10-100 days) lack highly eccentric orbits. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 53 155 B0-B9.5 IV or V binaries with known orbital elements table2.dat 53 151 A0-A5 IV or V primaries with known orbital elements table3.dat 53 85 A6-F0 VI or V primaries with known orbital elements
See also: V/50 : Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) V/122 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004) J/ApJ/616/562 : Rotational velocities in binaries (Abt+, 2004) Byte-by-byte Description of file: table1.dat table2.dat table3.dat
Bytes Format Units Label Explanations
1- 5 A5 --- HR The HR number 7- 13 A7 --- HD The HD number 15- 28 F14.6 d Per Period 30- 42 A13 --- Type Binary type (spectroscopic/visual binary) 44- 49 F6.4 --- e Orbital eccentricity 51- 53 A3 --- Grade Grade (1)
Note (1): Quality of the orbital elements as assigned by the compilers (1 to 5 for SBs, 1 to 9 for VBs - 1 being the lowest grade).
History: * 07-Dec-2005: From electronic version of the journal * 27-Apr-2006: Errors in table2: - HR 963 modified into HR 8963 in table2. - Some confusion in the complex system HR 7775-7776 corrected.
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 07-Dec-2005
|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|