Projets Spectroscopie



Hot Stars

 
       

 

 

 

O type stars are hot stars (30 to > 50 000 K) showing He ionized lines in their spectrum.

O-type stars may exhibit emission lines.

According to Harvard classification,

Oe : Balmer HI emission
Of : NIII and He II emission lines

 

____ Of stars ____________________________________________________________________________________________________________

Classification introduced by Nolan R. Walborn (1971)

Type
NIII 4634-4640
He II 4686
Si IV 1089-4116
f+
Emission
Emission
Emission
f
Emission
Emission
(f)
Emission
Absorption/Neutral
((f))
Weak emission
Emission

Classification in Galactic O star catalog (Maiz-apellaniz+, 2004)

 

Bright Of stars list

#
HD
Name
AD
Dec
Mag V
Sp. Type
Of type
Réf.
   1 Lamers & Leatherer (1993)
2 Walborn (1990)
3 Walborn (1971)
4 Underhill & Gilroy (1990)
1
108
  
00 06 03.4
+63 40 46.8
7.38
O7 If
f
4
  
2
14442
  
02 22 10.7
+58 32 58.9
9.27
O5nf(p)
f
4
  
3
14947
02 26 46.9
+58 52 33.1
8.05
O5 I
f+
1
  
4
15558
02 32 42.5
+61 27 21.5
7.95
O5 III
(f)
1
  
5
15570
02 32 49.4
+61 22 42.0
8.16
O4 I
f+
1
  
6
15629
02 33 20.5
+61 31 18.1
8.46
O5 V
((f))
1
  
7
17603
02 51 47.8
+57 02 54.5
8.5
O8.5If
f
4
  
8
24912
ksi Per
03 58 57.9
+35 47 27.7
2.62
O7.5 III
(f)
1
  
9
34656
05 20 43.1
+37 26 45.2
6.8
O7IIf
f
4
  
10
36861
lam Ori
05 35 08.2
+09 56 02.9
3.3
O8 III
((f))
1
  
11
46150
06 31 55.5
+04 56 34.2
6.75
O5 V
((f))
1
  
12
46223
06 32 09.3
+04 49 24.6
7.32
O4 V
((f))
1
  
13
47839
15 Mon
06 40 58.6
+09 53 44.7
4.64
O7 V
((f))
1
  
14
151804
V973 Sco
16 51 33.7
-41 13 49.9
5.25
O8 III
f
1
  
15
152408
16 54 58.5
-41 09 03.0
5.82
O8: Iafpe
f
1
  
16
164794
9 Sgr
18 03 52.4
-24 21 38.6
5.93
O4 V((f))
((f))
1
  
17
175754
18 57 35.7
-19 09 11.2
7.02
O8 Iaf
f
2
  
18
188001
9 Sge
19 52 21.7
+18 40 18.7
6.24
O7.5 Iaf
f
1
  
19
190429
  
20 03 29.3
+36 01 30.5
6.63
O4 If+
f+
1
  
20
190864
20 05 39.8
+35 36 27.9
7.79
O6.5 III(f)
(f)
1
  
21
210839
22 11 30.5
+59 24 52.1
5.08
O6 I(n)fp
f
1
  
22
225160
00 04 03.7
+62 13 19.0
8.22
O8 Ib(f)
f
3
  

Of stars from Galactic O star catalog (Maiz-apellaniz+, 2004) (Declination > -10°)

Name
Tycho-2
RAJ2000
DEJ2000
BTmag
VTmag
Sp. Type
SpType
LType
n_SpType
HD 225160       
4018-01788-1
00 04 03.796
+62 13 18.99
8.455
8.245
O8    Ib    (f)      
O8    
Ib    
(f)      
HD 000108       
4018-00457-1
00 06 03.386
+63 40 46.75
7.52
7.396
O6:         f?pe     
O6:   
       
f?pe     
HD 005005 A     
3663-01231-1
00 52 49.199
+56 37 39.59
8.589
8.582
O6.5  V     ((f))    
O6.5  
V     
((f))    
BD +60 261      
4031-01953-1
01 32 32.720
+61 07 45.84
9.001
8.717
O7.5  III   (n)((f)) 
O7.5  
III   
(n)((f)) 
HD 014434       
3694-02089-1
02 21 52.413
+56 54 18.03
8.658
8.535
O5.5  V     n((f))p  
O5.5  
V     
n((f))p  
HD 014442       
3698-01073-1
02 22 10.701
+59 32 58.92
9.646
9.313
O5          n(f)p    
O5    
       
n(f)p    
HD 014947       
3699-02289-1
02 26 46.992
+58 52 33.11
8.483
8.084
O5    I     f+       
O5    
I     
f+       
HD 015558       
4046-00044-1
02 32 42.536
+61 27 21.56
8.479
8.029
O5    III   (f)      
O5    
III   
(f)      
HD 015570       
4046-00606-1
02 32 49.422
+61 22 42.07
8.905
8.27
O4    I     f+       
O4    
I     
f+       
HD 015629       
4046-01192-1
02 33 20.586
+61 31 18.18
8.875
8.511
O5    V     ((f))    
O5    
V     
((f))    
BD +62 424      
4051-01794-1
02 36 18.221
+62 56 53.35
9.307
8.892
O6    V     ((f))    
O6    
V     
((f))    
HD 016691       
3708-00926-1
02 42 52.028
+56 54 16.45
9.169
8.747
O4    I     f+       
O4    
I     
f+       
HD 017505       
4047-02870-1
02 51 08.002
+60 25 03.87
7.727
7.394
O6.5  V     ((f))    
O6.5  
V     
((f))    
HD 017603       
3708-01269-1
02 51 47.798
+57 02 54.46
9.131
8.567
O7.5  Ib    (f)      
O7.5  
Ib    
(f)      
{xi} Per        
2369-02273-1
03 58 57.900
+35 47 27.72
4.002
4.026
O7.5  III   (n)((f)) 
O7.5  
III   
(n)((f)) 
HD 034656       
2402-00199-1
05 20 43.080
+37 26 19.23
6.795
6.798
O7    II    (f)      
O7    
II    
(f)      
BD +39 1328     
2914-01036-1
05 32 13.845
+40 03 57.88
10.417
9.924
O8.5  Ib    (f)      
O8.5  
Ib    
(f)      
{lambda} Ori A  
0705-02400-1
05 35 08.277
+09 56 02.96
3.306
3.509
O8    III   ((f))    
O8    
III   
((f))    
HD 046150       
0154-01683-1
06 31 55.519
+04 56 34.27
6.873
6.792
O5    V     ((f))    
O5    
V     
((f))    
HD 046223       
0154-00070-1
06 32 09.306
+04 49 24.73
7.484
7.324
O4    V     ((f+))   
O4    
V     
((f+))   
HD 046573       
0150-01508-1
06 34 23.568
+02 32 02.94
8.291
7.988
O7    III   ((f))    
O7    
III   
((f))    
15 Mon          
0750-01880-1
06 40 58.656
+09 53 44.71
4.374
4.642
O7    V     ((f))    
O7    
V     
((f))    
HD 169582       
5694-01105-1
18 25 43.147
-09 45 11.02
9.267
8.785
O6    I     f        
O6    
I     
f        
HD 172175       
5692-00043-1
18 39 03.776
-07 51 35.44
10.094
9.592
O6    I     (n)f     
O6    
I     
(n)f     
BD +22 3782     
2139-02396-1
19 43 10.970
+23 17 45.38
9.951
9.43
O7    V     ((f))    
O7    
V     
((f))    
HD 186980       
2660-02556-1
19 46 15.902
+32 06 58.16
7.532
7.493
O7.5  III   ((f))    
O7.5  
III   
((f))    
9 Sge           
1620-03737-1
19 52 21.765
+18 40 18.75
6.188
6.225
O7.5  Ia    f        
O7.5  
Ia    
f        
HD 190429 A     
2682-03566-1
20 03 29.399
+36 01 30.01
7.201
7.088
O4    I     f+       
O4    
I     
f+       
HD 190864       
2678-00109-1
20 05 39.800
+35 36 27.98
7.937
7.794
O6.5  III   (f)      
O6.5  
III   
(f)      
HD 191612       
2683-03518-1
20 09 28.608
+35 44 01.31
8.059
7.851
O6.5        f?pe     
O6.5  
       
f?pe     
HD 191978       
3159-00933-1
20 10 58.281
+41 21 09.91
8.166
8.057
O8.5  III   ((f))    
O8.5  
III   
((f))    
HD 192281       
3155-01633-1
20 12 33.121
+40 16 05.45
7.908
7.59
O5    V     n((f))p  
O5    
V     
n((f))p  
HD 192639       
2683-00853-1
20 14 30.429
+37 21 13.83
7.455
7.167
O7    Ib    (f)      
O7    
Ib    
(f)      
HD 228766       
2684-01935-1
20 17 29.703
+37 18 31.13
9.798
9.233
O4    I     f        
O4    
I     
f        
HD 228841       
3151-03056-1
20 18 29.692
+38 52 39.76
9.55
9.045
O6.5  V     n((f))   
O6.5  
V     
n((f))   
HD 193514       
3151-00549-1
20 19 08.498
+39 16 24.23
7.888
7.469
O7    Ib    (f)      
O7    
Ib    
(f)      
HD 229196       
3156-01600-1
20 23 10.787
+40 52 29.85
9.463
8.619
O6    III   (n)(f)   
O6    
III   
(n)(f)   
HD 229232       
3152-00289-1
20 23 59.183
+39 06 15.27
10.476
9.637
O4    V     n((f))   
O4    
V     
n((f))   
Cyg OB2-4       
3161-01063-1
20 32 13.823
+41 27 11.99
11.525
10.301
O7    III   ((f))    
O7    
III   
((f))    
Cyg OB2-5       
3161-01401-1
20 32 22.492
+41 18 19.52
       
11.941
O7    Ia    nfp      
O7    
Ia    
nfp      
Cyg OB2-22 B                 
20 33 08.800
+41 13 14.00
       
      
O6    V     ((f))    
O6    
V     
((f))    
Cyg OB2-22 A                 
20 33 08.900
+41 13 15.00
       
      
O3    I     f*       
O3    
I     
f*       
Cyg OB2-9       
3161-00015-1
20 33 10.734
+41 15 08.25
12.952
11.122
O5    I     f+       
O5    
I     
f+       
Cyg OB2-7       
3161-01335-1
20 33 14.112
+41 20 21.88
12.209
10.746
O3    I     f*       
O3    
I     
f*       
Cyg OB2-8 A     
3161-01325-1
20 33 15.078
+41 18 50.51
10.418
9.232
O6    Ib    (n)(f)   
O6    
Ib    
(n)(f)   
Cyg OB2-8 C     
3161-01340-1
20 33 17.977
+41 18 31.19
11.351
10.138
O5    III   (f)      
O5    
III   
(f)      
Cyg OB2-11      
3161-00646-1
20 34 08.514
+41 36 59.42
11.533
10.234
O5    I     f+       
O5    
I     
f+       
HD 199579       
3179-00457-1
20 56 34.779
+44 55 29.01
5.984
5.962
O6    V     ((f))    
O6    
V     
((f))    
68 Cyg          
3181-00836-1
21 18 27.187
+43 56 45.40
4.948
5.023
O7.5  III:  n((f))   
O7.5  
III:  
n((f))   
HD 206267       
3975-01822-1
21 38 57.618
+57 29 20.55
5.908
5.73
O6.5  V     ((f))    
O6.5  
V     
((f))    
{lambda} Cep    
3981-01585-1
22 11 30.584
+59 24 52.25
5.293
5.099
O6    I     (n)fp    
O6    
I     
(n)fp    
BD +60 2522     
4279-01582-1
23 20 44.519
+61 11 40.53
9.111
8.752
O6.5        (n)(f)p  
O6.5  
       
(n)(f)p  

Complete catalog in Excel 2010 spreadsheet : Of Stars Catalog

 

Map

Line identification

HD 18801 = 9 Sge (O7.5 Iaf)

Spectra

 

 

 
HD designation HD 24912
Alternative name Ksi Per
Spectral type O7.5  III   (n)((f))
Magnitude V 4.03
 
HD designation HD 34656
Alternative name  
Spectral type O7 II (f)  
Magnitude V 6.80
 
HD designation HD 36861
Alternative name Lambda Ori
Spectral type O8    III   ((f))   
Magnitude V 3.51
 
HD designation HD 46150
Alternative name  
Spectral type  O5 V ((f)) 
Magnitude V 6.79
 
HD designation HD 46223
Alternative name  
Spectral type   O4    V     ((f+)) 
Magnitude V 7.32
 
HD designation HD 47339
Alternative name 15 Mon
Spectral type  O7 V  ((f)) 
Magnitude V 4.64
 
HD designation HD 188001
Alternative name 9 Sge
Spectral type   O7.5 Iaf
Magnitude V 6.23
 
HD designation HD 190429
Alternative name  
Spectral type O4 I  f+  
Magnitude V 7.09
     
     
     
     
     
     
     
     

 

 

 

 

 

 

 

 

List of lines

 

1
ion
Lambda (A)
m
He II
4199.87
m
He I
4387.93
m
He I
4471.48
m
He II
4541.59
m
He II
4685.68
m
He I
4713.15
m
He I
4921.93
m
He I
5015.68
m
He II
5411.52
m
O III
5592.37
m
C IV
5801.33
m
C IV
5811.98
m
He I
5875.62
m
He II
6406.44
m
He II
6527.16
m
He I
6678.15
m
He II
6683.26
m
He II
6890.88
m
He II
7065.24
s
N III
4485.55
s
N III
4504.96
s
N III
4634.14
s
N III
4640.64
s
N III
5320.82
s
N III
5327.18
s
C III
5695.92
s
N III
6394.72
s
Si IV
6667.56
s
Si IV
6701.21

From Underhill & Gilroy (1990) and Underhill (1995)

 

See also Christian Buil : http://www.astrosurf.com/buil/hotstars/hot_stars.htm

 

References

Nolan R. Walborn, Some Spectroscopic Characteristics of the OB Stars ..., Astrophysical Journal Supplement, 1971, vol. 23 : http://adsabs.harvard.edu/abs/1971ApJS...23..257W

N.R. Walborn & E. L. Fitzpatrick, Contemporary optical spectral classification of the OB stars... , 1990, P.A.S.P., vol. 102, p. 379-411 : http://adsabs.harvard.edu/abs/1990PASP..102..379W

A. B. Underhill & K. K. Gilroy, Notes on the radial velocities of 14 O stars ... , 1990, Astrophysical Journal, vol. 364, p. 626-636 : http://adsabs.harvard.edu/abs/1990ApJ...364..626U

Anne B. Underhill, A study of the spectra on seven Of stars ..., 1995, Astrophysical Journal Supplement v.100, p.461 : http://adsabs.harvard.edu/abs/1995ApJS..100..461U

 

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