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J/A+A/471/625       VLT-FLAMES survey of massive stars       (Trundle+, 2007)

The VLT-FLAMES survey of massive stars: Evolution of surface N abundances and effective temperature scales in the Galaxy and Magellanic Clouds. Trundle C., Dufton P.L., Hunter I., Evans C.J., Lennon D.J., Smartt S.J., Ryans R.S.I. <Astron. Astrophys., 471, 625-643 (2007)> =2007A&A...471..625T
ADC_Keywords: Stars, B-type ; Abundances ; Equivalent widths Keywords: stars: atmospheres - stars: early-type - stars: fundamental parameters - stars: evolution Abstract: We present an analysis of high resolution VLT-FLAMES spectra of 61 B-type stars with relatively narrow-lined spectra located in 4 fields centered on the Milky Way clusters; NGC3293 and NGC4755 and the Large and Small Magellanic cloud clusters; NGC2004 and NGC330. For each object a quantitative analysis was carried out using the non-LTE model atmosphere code TLUSTY; resulting in the determination of their atmospheric parameters and photospheric abundances of the dominant metal species (C, N, O, Mg, Si, Fe). The results are discussed in relation to our earlier work on 3 younger clusters in these galaxies; NGC6611, N11 and NGC346 paying particular attention to the nitrogen abundances which are an important probe of the role of rotation in the evolution of stars. This work along with that of the younger clusters provides a consistent dataset of abundances and atmospheric parameters for over 100 B-type stars in the three galaxies. We provide effective temperature scales for B-type dwarfs in all three galaxies and for giants and supergiants in the SMC and LMC. In each galaxy a dependence on luminosity is found between the three classes with the unevolved dwarf objects having significantly higher effective temperatures. A metallicity dependence is present between the SMC and Galactic dwarf objects, and whilst the LMC stars are only slightly cooler than the SMC stars, they are significantly hotter than their Galactic counterparts. Description: File tablea1.dat and tablea2.dat contain the mean absolute abundances of the stars in the Clusters NGC3293, NGC4755, NGC2004 and NGC330. The former were determined using the initial atmospheric parameters from Tables 3 and 4 as presented in the main paper and the latter were determined after correcting the microturbulence to obtain the mean Cluster silicon abundance in each star. File tableb1.dat contains the equivalent widths and line-by-line abundances for a subset of stars discussed in Hunter et al. (2007A&A..466..277H). File tablec1.dat, tablec2.dat, tablec3.dat, tablec4.dat, contain the equivalent widths and line-by-line abundances for the metal lines of the target stars in NGC3293, NG4755, NGC2004 and NGC330, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 79 77 Star positions, from Simbad tablea1.dat 105 61 Mean absolute abundances using initial atmospheric parameters tablea2.dat 106 61 Mean absolute abundances adjusting microturbulence tableb1.dat 37 16 Fe III Equivalent Widths and abundances in the young clusters from the VLT-FLAMES survey of massive stars tablec1.dat 53 424 NGC 3293 line by line equivalent widths & abundances tablec2.dat 53 530 NGC 4755 line by line equivalent widths & abundances tablec3.dat 53 1219 NGC 2004 line by line equivalent widths & abundances tablec4.dat 53 1060 NGC 330 line by line equivalent widths & abundances
See also: J/A+A/437/467 : VLT-FLAMES survey of massive stars. (Evans+, 2005) NGC 3293, NGC 4755 and NGC 6611 J/A+A/457/265 : VLT-FLAMES survey of massive stars. (Dufton+, 2006) NGC 3293, NGC 4755 and NGC 6611 J/A+A/456/623 : VLT-FLAMES survey of massive stars. (Evans+, 2006) NGC 330, NGC 346, NGC 2004 and N11 J/A+A/466/277 : VLT-FLAMES survey of massive stars. (Hunter+, 2007) NGC 6611, NGC 346 and N11 Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star identification 13- 14 I2 h RAh Simbad Right ascension (J2000) 16- 17 I2 min RAm Simbad Right ascension (J2000) 19- 23 F5.2 s RAs Simbad Right ascension (J2000) 25 A1 --- DE- Simbad Declination sign (J2000) 26- 27 I2 deg DEd Simbad Declination (J2000) 29- 30 I2 arcmin DEm Simbad Declination (J2000) 32- 35 F4.1 arcsec DEs Simbad Declination (J2000) 37- 41 F5.2 mag Bmag Simbad B magnitude 43- 47 F5.2 mag Vmag Simbad V magnitude 49- 58 A10 --- SpType Simbad MK spectral type 60- 79 A20 --- SName Simbad name
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star Identification (G1) 13- 23 A11 --- SpType MK Spectral Classification 25- 28 F4.2 --- CII mean carbon abundance (G2) 30- 33 F4.2 --- NII mean nitrogen abundance (G2) 35- 38 F4.2 --- e_NII Uncertainty in nitrogen abundance (G3) 40 I1 --- o_NII Number of lines used for mean N abundance 42- 45 F4.2 --- OII mean oxygen abundance (G2) 47- 50 F4.2 --- e_OII Uncertainty in oxygen abundance (G3) 52- 53 I2 --- o_OII Number of lines used for mean O abundance 55- 58 F4.2 --- MgII mean magnesium abundance (G2) 60- 63 F4.2 --- e_MgII Uncertainty in magnesium abundance (G3) 65- 68 F4.2 --- SiII ? mean Si II abundance (G2) 70- 73 F4.2 --- e_SiII ? Uncertainty in Si II abundance (G3) 75- 78 F4.2 --- SiIII mean Si III abundance (G2) 80- 83 F4.2 --- e_SiIII Uncertainty in Si III abundance (G3) 85- 88 F4.2 --- SiIV ? mean Si IV abundance (G2) 90- 93 F4.2 --- e_SiIV ? Uncertainty in Si IV abundance (G3) 95- 98 F4.2 --- FeIII ? mean iron abundance (G2) 100-103 F4.2 --- e_FeIII ? Uncertainty in iron abundance (G3) 105 I1 --- o_FeIII ? Number of lines used for mean iron abundance
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star Identification (G1) 13- 23 A11 --- SpType MK Spectral Classification 25 A1 --- l_Vtc Limit flag on Vtc 26- 27 I2 km/s Vtc Corrected microturbulence to give mean Si 29 A1 --- l_Vturb Limit flag on Vturb 30- 31 I2 km/s Vturb Initial microturbulence 33- 36 F4.2 --- CIIa mean carbon abundance (G2) 38- 41 F4.2 --- NIIa mean nitrogen abundance (G2) 43- 46 F4.2 --- e_NIIa Uncertainty in nitrogen abundance (G3) 48- 51 F4.2 --- OIIa mean oxygen abundance (G2) 53- 56 F4.2 --- e_OIIa Uncertainty in oxygen abundance (G3) 58- 61 F4.2 --- MgIIa mean magnesium abundance (G2) 63- 66 F4.2 --- e_MgIIa Uncertainty in magnesium abundance (G3) 68- 71 F4.2 --- SiIIa ? mean Si II abundance (G2) 73- 76 F4.2 --- e_SiIIa ? Uncertainty in Si II abundance (G3) 78- 81 F4.2 --- SiIIIa mean Si III abundance (G2) 83- 86 F4.2 --- e_SiIIIa Uncertainty in Si III abundance (G3) 88- 91 F4.2 --- SiIVa ? mean Si IV abundance (G2) 93- 96 F4.2 --- e_SiIVa ? Uncertainty in Si IV abundance (G3) 98-101 F4.2 --- FeIIIa ? mean iron abundance (G2) 103-106 F4.2 --- e_FeIIIa ? Uncertainty in iron abundance (G3)
Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star Identification (G1) 13- 14 I2 0.1pm EWFe4419 Equivalent width of FeIII 4419 line 16- 19 F4.2 --- AFe4419 Absolute abundance of FeIII 4419 line (G2) 21- 22 I2 0.1pm EWFe4430 ? Equivalent width of FeIII 4430 line 24- 27 F4.2 --- AFe4430 ? Absolute abundance of FeIII 4430 line (G2) 29- 32 F4.2 --- AFeIII Mean FeIII abundance (G2) 34- 37 F4.2 --- e_AFeIII Uncertainty in FeIII abundance (G3)
Byte-by-byte Description of file: tablec*.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Star Identification (G1) 14- 21 A8 --- Ion Element/Ion (1) 24- 30 F7.2 0.1nm lambda Wavelength of line (1) 33- 35 I3 0.1pm EW ? Equivalent width of line 38- 41 F4.2 --- Ab1 ? Abundance using initial parameters (G2)(2) 43- 47 F5.2 --- Ab2 ? Abundance with corrected microturbulence (G2)(2) 50- 53 F4.2 --- Ab3 ? Abundance using corrected parameters (G2)(2)
Note (1): The energy levels and oscillator strengths relating to the transitions for the metal lines are available online at http://star.pst.qub.ac.uk/~pld/line_identifications.html. Note (2): The abundances are estimated from the lines and they show the results from the 3 steps in determining the abundances as described in Sect. 4 of the paper.
Global notes: Note (G1): Nomenclature note: NGC330-NNN = Cl* NGC 330 ELS NNN in Simbad NGC346-NNN = Cl* NGC 346 ELS NNN in Simbad N11-NNN = [ELS2006] N11 NNN in Simbad NGC2004-NNN = Cl* NGC 2004 ELS NNN in Simbad NGC3293-NNN = Cl* NGC 3293 ESL NNN in Simbad NGC4755-NNN = Cl* NGC 4755 ESL NNN in Simbad NGC6611-NNN = Cl* NGC 6611 ESL NNN in Simbad Note (G2): Abundances are presented as [X]=12+log([X/H]) in units of dex. Note (G3): Uncertainties account for both random and standard errors.
Acknowledgements: Carrie Trundle, c.trundle(at)qub.ac.uk
(End) Patricia Vannier [CDS] 12-Jun-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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