J/AJ/119/2214 Photometry of Magellanic OB associations (Massey+, 2000)
The progenitor masses of Wolf-Rayet stars and luminous blue variables
determined from cluster turnoffs. I. Results from 19 OB Associations in the
Magellanic Clouds
Massey P., Waterhouse E., DeGioia-Eastwood K.
<Astron. J. 119, 2214 (2000)>
=2000AJ....119.2214M 2000AJ....119.2214M
ADC_Keywords: Magellanic Clouds ; Photometry, UBV ; Stars, Wolf-Rayet ;
Stars, early-type
Keywords: Magellanic Clouds - stars: early-type - stars: evolution - stars:
Wolf-Rayet
Abstract:
We combine new CCD UBV photometry and spectroscopy with those from the
literature to investigate 19 Magellanic Cloud OB associations that
contain Wolf-Rayet (W-R) and other types of evolved, massive stars.
Our spectroscopy reveals a wealth of newly identified interesting
objects, including early O-type supergiants, a high-mass, double-lined
binary in the SMC, and, in the LMC, a newly confirmed luminous blue
variable (LBV; R85), a newly discovered W-R star (Sk -69deg 194),
and a newly found luminous B[e] star (LH 85-10). We use these data to
provide precise reddening determinations and construct physical H-R
diagrams for the associations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 164 548 Catalog of Photometry and spectroscopy of 19
Magellanic Cloud OB associations
table5.dat 108 184 Derived parameters for the highest mass
unevolved stars
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See also:
J/ApJS/91/583 : MC massive stars IMF. I. (Hill+, 1994)
J/AJ/108/1256 : The OB association LH 58 (Garmany+, 1994)
J/A+A/301/396 : Photometry of NGC 1962-65-66-70 (Will J.-M.+, 1995)
J/ApJS/104/71 : UBV photometry of OB associations in LMC superbubbles
(Oey 1996)
J/AJ/118/1684 : UBV photometry of 4 LMC compact OB groups (Walborn+, 1999)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Assoc Association name (1)
10 A1 --- n_Assoc [cd] Color correction required (2)
13- 31 A19 --- Name1 Object name
33- 50 A18 --- Name2 Second name of object
52- 60 A9 --- Name3 Third name of object
62- 68 A7 --- Name4 Fourth name of object
71- 72 I2 h RAh ? Right Ascension (J2000)
74- 75 I2 min RAm ? Right Ascension (J2000)
77- 81 F5.2 s RAs ? Right Ascension (J2000)
85 A1 --- DE- Declination (J2000)
86- 87 I2 deg DEd ? Declination (J2000)
89- 90 I2 arcmin DEm ? Declination (J2000)
92- 95 F4.1 arcsec DEs ? Declination (J2000)
98-102 F5.2 mag Vmag ? The V band magnitude
104-108 F5.2 mag (B-V) ? The (B-V) color
110-114 F5.2 mag (U-B) ? The (U-B) color
117 A1 --- f_Comments [b] Indicates luminosity class adjusted
based upon MV
120-164 A45 --- Comments Spectral type and/or comments (3)
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Note (1):
NGC 346 = See Massey et al. (1989AJ.....98.1305M 1989AJ.....98.1305M)
LH 9 = See Walborn et al. (1999AJ....118.1684W 1999AJ....118.1684W)
LH 47 = See Oey & Massey (1995ApJ...452..210O 1995ApJ...452..210O)
LH 58 = See Garmany et al. (1994AJ....108.1256G 1994AJ....108.1256G)
LH 101 = Tester & Niemela (1998A&AS..130..527T 1998A&AS..130..527T)
Note (2):
c = U-B colors of L 39 may require a correction of -0.13 mag. See text.
d = U-B colors of LH 41 may require a correction of -0.15 mag. See text.
Note (3):
HM93 = Heydari-Malayeri et al. (1993A&A...278...11H 1993A&A...278...11H)
M95 = Massey et al. (1995ApJ...438..188M 1995ApJ...438..188M)
S87 = Schild (1987A&A...173..405S 1987A&A...173..405S)
ST92 = Schild & Testor (1992A&AS...92..729S 1992A&AS...92..729S)
TN98 = Testor & Niemela (1998A&AS..130..527T 1998A&AS..130..527T)
W99 = Walborn et al. (1999AJ....118.1684W 1999AJ....118.1684W)
Z93 = Zickgraf (1993)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Assoc Association name
11 A1 --- n_Assoc [abcd] Stellar identification (1)
13- 26 A14 --- Name1 Object name
28- 33 A6 --- Name2 Second name of object
36- 40 F5.3 [K] logT Derived Log of the effective temperature
41 A1 --- u_logT Indicates an uncertain LogT
43- 46 F4.1 mag VMag Derived Absolute V band magnitude
47 A1 --- u_VMag Indicates an uncertain VMag
49- 53 F5.1 mag Mbol Derived Bolometric magnitude
54 A1 --- u_Mbol Indicates an uncertain MBol
56- 58 I3 solMass Mass Derived Mass in solar units
59 A1 --- u_Mass Indicates an uncertain Mass
61- 64 F4.2 [Myr] logAge Derived Log of the age in Myrs
65 A1 --- u_logAge Indicates an uncertain LogAge
67-111 A45 --- Comments Spectral type and/or comment
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Note (1):
a = Star identification from Massey et al. (1989AJ.....98.1305M 1989AJ.....98.1305M)
b = Star identification from Oey & Massey (1995ApJ...452..210O 1995ApJ...452..210O)
c = Star identification from Garmany et al. (1994AJ....108.1256G 1994AJ....108.1256G)
d = Star identification from Testor & Niemela (1998A&AS..130..527T 1998A&AS..130..527T)
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History:
* 23-May-2000: Prepared by Greg Schwarz [AAS]
* 25-Jan-2009: Correction in table2 of the position of Sk-68 59
(error communicated by Brian Skiff, Lowell Obs., agreed by
the author Phil Massey)
References:
Zickgraf, F.-J. 1993, in New Aspects of Magellanic Cloud Research, ed. B.
Baschek, G. Klare, & J. Lequeux (Berlin: Springer), 257
(End) Greg Schwarz [AAS] 23-May-2000