J/A+A/443/851 Effective temperature of 30 Dor population (Selman+, 2005)
The IMF of the field population of 30 Doradus.
Selman F.J., Melnick J.
<Astron. Astrophys., 443, 851-861 (2005)>
=2005A&A...443..851S 2005A&A...443..851S
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Photometry, UBV ;
Effective temperatures
Keywords: star formation - galaxies: stellar content -
galaxies: Magellanic Clouds - galaxies: star clusters -
techniques: photometric - methods: statistical
Abstract:
The star-formation history and IMF of the field population of the
30 Doradus super-association is determined using Wide Field Imager
photometry. The cluster NGC 2070 and the OB association LH104 are also
studied and used for comparison. The star-formation history of the
30∼Doradus super-association appears to be characterized by a large
increase in star-formation activity 10Myr to 20Myr ago. This seems to
be the case across the whole eastern half of the LMC as demonstrated
by the ages of stellar populations as far away as 30 Doradus and
Shapley's Constellation III. Star-formation appears to be occurring at
a constant rate in the field and in loose associations, and in bursts
in the clusters. The field IMF is found to have almost the exact
Salpeter slope in the range 7M☉≤M≤40M☉, at odds with
previous claims. We find that, for objects with more complex
star-formation histories, Be stars and selective incompleteness
strongly affect the determination of the IMF for M>40M☉,
naturally explaining the observed deviation of the high mass IMF slope
from the Salpeter value.The present work supports the idea of a
universal IMF.
Description:
Catalog of observed and physical parameters for the stars in the
30 Doradus super-association.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 153 12993 Observed and physical parameters of stars
in 30 Doradus
table3.dat 77 98 Spectroscopic and photometric Teff for stars
in selected fields
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See also:
II/187 : 30 Doradus OB Associations (Parker 1992)
J/A+A/341/98 : The ionizing cluster of 30 Doradus. I. (Selman+ 1999)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- Seq Star unique ID in this work
12- 17 F6.1 pix Xpos X position (0.238 arcsec/pixels)
21- 26 F6.1 pix Ypos Y position (0.238 arcsec/pixels)
32- 37 F6.3 mag Vmag WFI V band magnitude
40- 44 F5.3 mag e_Vmag The 1σ uncertainty in V
48- 53 F6.3 mag (B-V) WFI (B-V) colour index
56- 60 F5.3 mag e_(B-V) The 1σ uncertainty in (B-V)
64- 69 F6.3 mag (U-B) WFI (U-B) colour index
72- 76 F5.3 mag e_(U-B) The 1σ uncertainty in (U-B)
81- 85 F5.3 [K] LogTeff Log of the effective temperature
87- 93 F7.3 mag Mbol Bolometric magnitude
96 I1 --- LC Luminosity class
100-107 F8.3 Myr Age Age
110-114 F5.1 solMass Mini Initial mass
119-123 F5.3 mag E(B-V) Colour excess
127-132 F6.3 --- Uchi DAOPHOT allstar Chi avg. for WFI U band
134-139 F6.3 --- Bchi DAOPHOT allstar Chi avg. for WFI B band
141-146 F6.3 --- Vchi DAOPHOT allstar Chi avg. for WFI V band
148-153 F6.3 --- sharp DAOPHOT allstar sharp WFI UBV average
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- Seq Sequential number
10- 15 A6 --- Name Name (1)
17- 32 A16 --- SpType MK spectral type (2)
34- 37 F4.2 K Teff Spectroscopic effective temperature
38 A1 --- --- [-]
39- 42 F4.2 K Teff2 ? Lower limit of Teff when interval
45- 50 F6.3 mag Vmag V magnitude
52- 56 F5.3 mag e_Vmag rms uncertainty on Vmag
58- 61 F4.2 [K] log(Teff)ph Photometric effective temperature
63- 65 F3.1 --- chi Goodness of the psf profile fit
67- 77 A11 --- SName Simbad name
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Note (1): The reference identification are from:
p = Parker, 1993, Cat. II/187, [P93] NNNN in Simbad
wb = Walborn & Blades, 1997ApJS..112..457W 1997ApJS..112..457W, [WB97] NN
st = Schild & Testor, 1992A&AS...92..729S 1992A&AS...92..729S, [ST92] N-NN
Note (2): The spectral types are taken from the compilation in Paper II,
(Selman et al., 1999A&A...347..532S 1999A&A...347..532S) for the neighborhood of the
Tarantula; from Walborn & Blades (1997ApJS..112..457W 1997ApJS..112..457W) for Hodge 301;
and from Schild & Testor (1992A&AS...92..729S 1992A&AS...92..729S) for LH104.
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Acknowledgements: Fernando J. Selman, fselman(at)eso.org
References:
Selman et al., Paper I 1999A&A...341...98S 1999A&A...341...98S, Cat. J/A+A/341/98
Selman et al., Paper II 1999A&A...347..532S 1999A&A...347..532S
(End) Fernando Selman [ESO, Chile], Patricia Vannier [CDS] 18-Nov-2005