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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 (SIMBAD/NED BibCode) =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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 56 101 Star selected table3.dat 126 86 Normal energy distributions for O9-B5 stars
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 ------------------------------------------------------- Sp (B-V)0 (U-B)0 B-V U-B ------------------------------------------------------- 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 ------------------------------------------------------- Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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)
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, Cat. III/201
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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)
Note (1): Spectral energy normalized to 1.0 at 5475Å
Table 4: RMS deviations from the normal energy distributions in various spectral intervals ---------------------------------------------------------------------------- Lambda O9V O9.5V B0V-III B0.5IV-V B1V B1.5V B2III B2IV ---------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------- B2IV-V B2V B2.5V B3IV B3V B5IV B5III ---------------------------------------------------------------------------- 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
(End) Veta Avedisova [INASAN] 20-Jul-2000
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