MNRAS Comparative statistics of triple and quadruple stars and their origin ================================================================================ Comparative statistics of triple and quadruple stars and their origin A. Tokovinin = (SIMBAD/NED BibCode) ================================================================================ Keywords: stars: binaries: visual -- stars: binaries: spectroscopic -- stars: formation Description: The statistical samples of multiple stars containing a 2+1 hierarchical structure (triple, table 2) and 2+2 structure (quadruple, table 3) are given. The data are extracted from the updated Multiple-Star Catalog, http://www.ctio.noao.edu/~atokovin/stars/index.php (see also A&AS, 1997, 124, 75). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2 79 725 Table 2 (triple stars) table3 78 81 Table 3 (quadruple stars) notes 80 281 Notes to Table 3 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 -- WDS WDS J2000 code 12- 17 F6.2 day P_L Log10(outer period/1day) 18- 23 F6.2 day P_S Log10(inner period/1day) 24- 29 F6.2 M_sun M_1 Primary mass, solar units 31- 31 A1 -- M1code Mass code for M_1 (1) 32- 37 F6.2 M_sun M_2 Secondary mass, solar units 39- 39 A1 -- M2code Mass code for M_2 (1) 40- 45 F6.2 M_sun M_3 Tertiary mass, solar units 47- 47 A1 -- M3code Mass code for M_3 (1) 48- 55 F8.2 mas PLX parallax, mas -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 -- WDS WDS J2000 code 12- 17 F6.2 day P_L Log10(outer period/1day) 18- 23 F6.2 day P_S1 Log10(inner period 1/1day) 24- 29 F6.2 day P_S2 Log10(inner period 2/1day) 30- 35 F6.2 M_sun M_11 Primary mass 1, solar units 37- 37 A1 -- M11code Mass code for M_11 (1) 38- 43 F6.2 M_sun M_12 Secondary mass 1, solar units 45- 45 A1 -- M12code Mass code for M_12 (1) 46- 51 F6.2 M_sun M_21 Primary mass 2, solar units 53- 53 A1 -- M21code Mass code for M_21 (1) 54- 59 F6.2 M_sun M_22 Secondary mass 2, solar units 60- 60 A1 -- M22code Mass code for M_22 (1) 61- 69 F8.2 mas PLX parallax, mas -------------------------------------------------------------------------------- Note (1): Mass codes: * - masses from orbit, isochrone fitting etc. a - estimated from spectral type or B-V color index from Allen's tables s - sum of masses for the sub-system(s) q - estimated from primary mass and mass ratio of SB2 m - minimum secondary mass for SB1 v - estimated from magnitude difference of a visual binary : - uncertain, magnitude difference assumed to be 2 mag. -------------------------------------------------------------------------------- Byte-by-byte Description of file: notes -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 80 A80 --- Text Text in free format -------------------------------------------------------------------------------- ================================================================================ (End)