J/A+A/479/541 VLT-FLAMES survey of massive stars (Hunter+, 2008)
The VLT-FLAMES survey of massive stars: atmospheric parameters and rotational
velocity distributions for B-type stars in the Magellanic Clouds.
Hunter I., Lennon D.J., Dufton P.L., Trundle C., Simon-Diaz S.,
Smartt S.J., Ryans R.S.I., Evans C.J.
<Astron. Astrophys., 479, 541-555 (2008)>
=2008A&A...479..541H 2008A&A...479..541H
ADC_Keywords: Magellanic Clouds ; Clusters, open ; Stars, B-type ;
Effective temperatures ; Radial velocities ; Rotational velocities
Keywords: stars: early-type - stars: atmospheres - stars: rotation -
stars: evolution - galaxies: Magellanic Clouds
Abstract:
We aim to provide the atmospheric parameters and rotational velocities
for a large sample of O- and early B-type stars, analysed in a
homogeneous and consistent manner, for use in constraining theoretical
models.
Atmospheric parameters, stellar masses, and rotational velocities have
been estimated for approximately 250 early B-type stars in the Large
(LMC) and Small (SMC) Magellanic Clouds from high-resolution
VLT-FLAMES data using the non-LTE TLUSTY model atmosphere code. This
data set has been supplemented with our previous analyses of some 50
O-type stars (Mokiem et al., 2006A&A...456.1131M 2006A&A...456.1131M, 2007A&A...465.1003M 2007A&A...465.1003M)
and 100 narrow-lined early B-type stars (Hunter et al., 2006,
Cat. J/A+A/466/277, Trundle et al., 2007, Cat. J/A+A/471/625) from
the same survey, providing a sample of ∼400 early-type objects.
Description:
As part of a European Southern Observatory (ESO) Large Programme on
the Very Large Telescope (VLT, Paranal, Chile) observations were
obtained for over 700 stars using the Fibre Large Array Multi-Element
Spectrograph (FLAMES), with the majority of these objects being O- or
early B-type stars. Observations were taken towards three Galactic
clusters, NGC 6611, NGC 3293 and NGC 4755; two LMC clusters, N 11 and
NGC 2004 and two SMC clusters, NGC 346 and NGC 330. Details of the
observational fields, target selection and data reduction were
discussed in Paper I and Paper II, Evans et al., Cat. J/A+A/437/467
and Cat. J/A+A/456/623.
Objects:
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RA (2000) DE Designation(s) (files)
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00 59 18.0 -72 10 48 NGC 346 = LHA 115-N 66A (table3)
00 56 18.7 -72 27 50 NGC 330 = Cl Kron 35 (table4)
04 57 16.2 -66 23 18 IC 2116 = LHA 120-N 11A (table5)
05 30 40.2 -67 17 14 NGC 2004 = KMHK 991 (table6)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 17 116 Radial distances of the objects in the NGC 346
FLAMES sample
table3.dat 74 100 Atmospheric parameters and vsini values for the
NGC 346 sample
table4.dat 74 104 Atmospheric parameters and vsini values for the
NGC 330 sample
table5.dat 74 103 Atmospheric parameters and vsini values for the
N 11 (IC 2116) sample
table6.dat 74 101 Atmospheric parameters and vsini values for the
NGC 2004 sample
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See also:
J/A+A/437/467 : VLT-FLAMES survey of massive stars (Evans+, 2005)
J/A+A/456/623 : VLT-FLAMES survey of massive stars (Evans+, 2006)
J/A+A/471/625 : VLT-FLAMES survey of massive stars (Trundle+, 2007)
J/A+A/466/277 : VLT-FLAMES survey of massive stars (Hunter+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Star designation, NGC 346-NNN (G1)
14- 17 F4.2 arcmin Dist Radial distance (1)
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Note (1): Radial distances of the objects in the NGC 346 FLAMES sample with
respect to the centre of star formation taken as the position of
object 435 from the Massey et al. (1989, Cat. J/AJ/98/1305)
catalogue of OB stars in NGC 346; RA=00:59:04.49, DE=-72:10:24.7.
The centre of NGC 346 adopted in Paper II (Evans et al., Cat.
J/A+A/456/623) for calculation of radial distances was obtained from
the SIMBAD database (operated at the CDS, Strasbourg, France) and is
actually the centre of the ionised shell of gas, which is offset from
the cluster centre.
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Byte-by-byte Description of file: table[3456].dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Star name (G1)
13 A1 --- m_Name [B] Multiplicity index on Name (1)
15- 30 A16 --- SpType MK spectral type
32- 36 I5 K Teff ? Effective temperature
37- 42 A6 --- n_Teff Note on Teff when no measurement (2)
44- 47 F4.2 [cm/s2] logg ?=- Surface gravity
48 A1 --- u_logg Uncertainty flag on logg (3)
50 A1 --- l_vsini Limit flag on vsini
51- 53 I3 km/s vsini Rotational velocity
54 A1 --- u_vsini Uncertainty flag on vsini (3)
56- 58 A3 --- Met Method used (4)
60- 63 F4.2 solLum Lum ? Luminosity
65- 66 I2 solMass Mass ? Mass
68- 74 A7 --- Com Comments
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Note (1): Where it was possible to measure the projected rotational
velocity of the secondary object in a double lined spectroscopic
binary system, a second entry is given with "B" appended to the
object identifier.
Note (2): We do not give atmospheric parameters for those objects listed as
Be stars (Be), double lined spectroscopic binaries (SB2) or classified
with an uncertain spectral type (SP?).
Note (3): Values marked with colons indicate parameters where fitting has
been difficult and the uncertainties may be larger than normal.
Note (4): Method as follows:
M06 = values directly obtained from Mokiem et al.
(2006A&A...456.1131M 2006A&A...456.1131M, 2007A&A...465.1003M 2007A&A...465.1003M)
T06 = values directly obtained from Trundle et al.
(2007, Cat. J/A+A/471/625)
H06 = values directly obtained from Hunter et al.
(2007, Cat. J/A+A/466/277)
He = indicates the methodology outlined in Sect. 3.2 has been used
to derived the atmospheric parameters.
A = the temperature has been assumed based on spectral type
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Global notes:
Note (G1): Names are written as:
table3.dat = NGC 346-NNN, Cl* NGC 346 ELS NNN in Simbad
table4.dat = NGC 330-NNN, Cl* NGC 330 ELS NNN in Simbad
table5.dat = N11-NNN, [ELS2006] N11 NNN in Simbad
table6.dat = NGC 2004-NNN, Cl* NGC 2004 ELS NNN in Simbad
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Mar-2008