J/AZh/75/70 Energy distribution of O9-B5 stars (Knyazeva+, 1998)
On the normal spectral energy distribution of stars: Spectral types O9-B5.
Knyazeva L.N., Kharitonov A.V.
<Astron. Zh. 75, 70 (1998)>
=1998AZh....75...70K 1998AZh....75...70K (SIMBAD/NED BibCode)
=1998ARep...42...60K 1998ARep...42...60K
ADC_Keywords: Stars, OB ; Energy distributions ; Spectrophotometry
Description:
The normal spectral energy distribution for spectral subtypes from O4
to O8 and O9 to B5 for luminosity classes V,IV and III are derived.
Three photometrically uniform catalogs served as the source of the
spectrophotometric data used. Synthetic color indices for all spectral
types are calculated using the energy distribution curves obtained.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 56 101 Star selected
table3.dat 126 86 Normal energy distributions for O9-B5 stars
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See also:
III/186 : Energy distribution in stars at 320-760 nm (Knyazeva+, 1996)
J/AZh/73/906 : Energy distribution of main-sequence B stars (Knyazeva+, 1996)
J/AZh/75/197 : Energy distribution of O5-O8 stars (Knyazeva+, 1998)
Table1: Normal and Synthetic color indices
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Sp (B-V)0 (U-B)0 B-V U-B
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O9V -0.31 -1.13 -0.30 -1.17
O9.5V -0.305 -1.105 -0.30 -1.14
B0III-V -0.30 -1.08 -0.29 -1.13
B0.5IV-V -0.28 -1.02 -0.29 -1.10
B1V -0.27 -0.95 -0.29 -1.03
B1.5V -0.26 -0.90 -0.25 -0.96
B2V -0.25 -0.85 -0.22 -0.84
B2IV-V -0.245 -0.855 -0.20 -0.85
B2IV -0.24 -0.86 -0.22 -0.93
B2III -0.24 -0.88 -0.21 -0.93
B2.5V -0.23 -0.78 -0.19 -0.76
B3IV -0.20 -0.73 -0.17 -0.71
B3V -0.21 -0.72 -0.17 -0.71
B5IV -0.17 -0.58 -0.15 -0.63
B5III -0.16 -0.59 -0.12 -0.51
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- SpInt Spectral interval
12-15 I4 --- HR Name of star from BS Catalogue (1)
18-22 F5.2 mag B-V B-V color index
27-31 F5.2 mag U-B U-B color index
35-38 F4.2 mag E(B-V) B-V color excess
44-50 A7 --- SpType MK Spectral type
52-56 A5 --- Ref Sources for spectrophotometric data (2)
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Note (1): Hoffleit, D. Bright Star Catalogue, 1982, 4th ed., Cat. V/50
Note (2): Sources for spectrophotometric data as follows:
A = Almaty catalogue, Kharitonov et al. Spectrophotometric Catalog of
stars, Almaty: Nauka, 1988, Cat. III/202
M = Moscow catalogue, Glushneva I.N. Spectrophotometriya yarkikh zvezd,
Moscow: Nauka, 1982, Cat. III/207
P = Pulkovo catalogue, Alekseeva et al., 1996BaltA...5..603A 1996BaltA...5..603A, Cat. III/201
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 0.1nm Lambda Wavelength
9- 13 F5.3 --- EO9V Spectral energy for O9V stars (1)
17- 21 F5.3 --- EO9.5V Spectral energy for O9.5V stars (1)
25- 29 F5.3 --- EB0III Spectral energy for B0III stars (1)
33- 37 F5.3 --- EB0.5V-IV Spectral energy for B0.5V-IV stars (1)
41- 45 F5.3 --- EB1V Spectral energy for B1V stars (1)
49- 53 F5.3 --- EB1.5V Spectral energy for B1.5V stars (1)
57- 61 F5.3 --- EB2V Spectral energy for B2V stars (1)
65- 69 F5.3 --- EB2IV-V Spectral energy for B2IV-V stars (1)
74- 78 F5.3 --- EB2IV Spectral energy for B2IV stars (1)
82- 86 F5.3 --- EB2III Spectral energy for B2III stars (1)
90- 94 F5.3 --- EB2.5V Spectral energy for B2.5V stars (1)
98-102 F5.3 --- EB3IV Spectral energy for B3IV stars (1)
106-110 F5.3 --- EB3V Spectral energy for B3V stars (1)
114-118 F5.3 --- EB5IV Spectral energy for B5IV stars (1)
122-126 F5.3 --- EB5III Spectral energy for B5III stars (1)
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Note (1): Spectral energy normalized to 1.0 at 5475Å
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Table 4: RMS deviations from the normal energy distributions in various
spectral intervals
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Lambda O9V O9.5V B0V-III B0.5IV-V B1V B1.5V B2III B2IV
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3225-3675 0.0489 0.0426 0.0248 0.0410 0.0166 0.0184 0.0131 0.0207
4025-4975 0.0022 0.0040 0.0072 0.0065 0.0051 0.0092 0.0024 0.0030
5025-5975 0.0005 0.0002 0.0004 0.0004 0.0002 0.0004 0.0001 0.0002
6025-7375 0.0008 0.0002 0.0003 0.0005 0.0015 0.0008 0.0002 0.0002
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B2IV-V B2V B2.5V B3IV B3V B5IV B5III
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3225-3675 0.0232 0.0400 0.0122 0.0129 0.0047 0.0118 0.0047
4025-4975 0.0037 0.0042 0.0062 0.0050 0.0080 0.0046 0.0080
5025-5975 0.0003 0.0006 0.0005 0.0003 0.0002 0.0003 0.0002
6025-7375 0.0004 0.0004 0.0006 0.0006 0.0003 0.0004 0.0003
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(End) Veta Avedisova [INASAN] 20-Jul-2000