III/117 MK Classifications of Close Visual Binaries (Corbally, 1984)
Close Visual Binaries. I. MK Classifications
Corbally C.J.
<Astrophys. J. Suppl. Ser. 55, 657( 1984)>
=1984ApJS...55..657C 1984ApJS...55..657C
ADC_Keywords: Stars, double and multiple ; MK spectral classification
Description:
Each component of 170 close visual binaries has been classified with
new procedures for controlling contamination problems. These
classifications are shown to be on the MK system. Two sources of area
scanner UBV photometry were compared in order to establish homogeneous
photometric as well as spectroscopic data. From a consideration of
systematic errors in the V magnitude difference between components the
photometry of Hurly and Warner is to be preferred. Absolute magnitudes
for each binary are derived from magnitude difference via a tested
MK-Mv map.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 103 459 Tables 1A and 1B from the published paper
notes.dat 72 691 Notes to tables
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Byte-per-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1 A1 --- Tno [AB] "A" when data from Table 1A (HW binaries)
"B" when data from Table 1B (remainder)
2- 10 A9 --- Name HR or HD designation
11- 12 A2 --- Comp Component
14- 23 A10 --- IDS IDS designation (based on 1900 coordinates)
Also the CPD or ADS numbers which are used
by Rakos to identify the binaries.
25- 41 A17 --- Sp MK Spectral type
42- 44 A3 --- Class Classification and Contamination factor (1)
46- 50 F5.2 mag Vmag ? V magnitude
51 A1 --- n_Vmag [)] the closing parenthesis indicates that
V is the difference between components
52- 56 F5.2 mag B-V ? B-V colour index
57 A1 --- n_B-V [)] the closing parenthesis indicates that
B-V is the difference between components
58- 62 F5.2 mag U-B ? U-B colour index
63 A1 --- n_U-B [)] the closing parenthesis indicates that
U-B is the difference between components
64- 65 A2 --- r_Vmag Reference of the photometry:
HW = Hurly & Warner (1983MNRAS.202..761H 1983MNRAS.202..761H)
Ra = Rakos et al. (1982A&AS...47..221R 1982A&AS...47..221R)
66- 70 F5.2 mag E(B-V) ? Colour excess
72- 76 F5.2 mag Mv ? Adopted absolute magnitude
78- 85 A8 --- ONames Other name
89-101 A13 --- Remarks Remarks
103 A1 --- flag [*] An asterisk (*) indicates a
supplementary note in file "notes.dat"
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Note (1): Classification quality symbols are:
G: Binaries which have secure classifications in agreement
C: Binaries with the classification of the secondary affected by
contamination
Ex: Binaries which have some explanation for not being of good quality
U: Binaries not of good quality and with no observed explanation
Inc: Binaries lacking some area scanner photometry or combined light photometry
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Byte-per-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1 A1 --- Tno [AB] "A" when notes to Table 1A (HW binaries)
"B" when notes to Table 1B (remainder)
2- 10 A9 --- Name Name of the binary; repeated for continuation
lines
11- 14 A4 --- Comp Component or type of the note
15 A1 --- --- [:]
18- 60 A43 --- Text Text of the note (1)
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Note (1): the following keys are used for abbreviations:
p = period in years
a = semi-major axis in arcseconds
par. = parallax
Ma = mass of A component in solar mass units
Mb = mass of B component in solar mass units
m.s. = main sequence
HB = horizontal branch star
BSC4 = Bright Star Catalogue, 4th edition (Hoffleit and Jaschek, Cat. V/50)
IDS = Index Catalogue of Double Stars (Jeffers et al. 1963; see Cat. I/107)
FS = Finsen and Worley 1970
ISO = results from isochrone investigation (Corbally 1983, PhD)
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References:
Corbally C.J., 1983: PhD thesis, Univ. Toronto
Hoffleit D., Jaschek C., 1982, "The Bright Star Catalogue" 4th Ed.,
New Haven, Yale Univ. Obs. (Cat. V/50)
Hurly P.R., Warner B., 1983, MNRAS 202, 761 (HW) (1983MNRAS.202..761H 1983MNRAS.202..761H)
Jeffers H.M., van den Bos W.H., Greeby F.M., 1963, Publ. Lick Obs. 21, 1
(see Cat. I/107)
Rakos K.D., et al., 1982, A&AS 47, 221 (1982A&AS...47..221R 1982A&AS...47..221R)
(End) Joseph Florsch [CDS] 14-Mar-1994