J/A+A/485/657 Physical parameters of Wolf-Rayet galaxies (Brinchmann+, 2008)
Galaxies with Wolf-Rayet signatures in the low-redshift Universe.
A survey using the Sloan Digital Sky Survey.
Brinchmann J., Kunth D., Durret F.
<Astron. Astrophys. 485, 657 (2008)>
=2008A&A...485..657B 2008A&A...485..657B
ADC_Keywords: Galaxies, spectra ; Abundances ; Equivalent widths
Keywords: stars: Wolf-Rayet - galaxies: abundances - galaxies: evolution -
galaxies: starburst - galaxies: fundamental parameters
Abstract:
The availability of large spectroscopic datasets has opened up the
possibility of constructing large samples of rare objects in a
systematic manner.
The goal of this study is to analyse the properties of galaxies
showing Wolf-Rayet features in their optical spectrum using spectra
from the Sloan Digital Sky Survey Release 6. With this unprecedentedly
large sample we aim to constrain the properties of the Wolf-Rayet
phase and its impact on the surrounding interstellar medium.
We carried out very careful continuum subtraction on all galaxies with
equivalent widths of Hβ>2Å in emission and identify Wolf-Rayet
features using a mixture of automatic and visual classification. We
combined this with spectroscopic and photometric information from the
SDSS and derive metal abundances using a number of methods.
Description:
These catalogues are for tables 3-5 from the paper and contain
positional and physical parameters for the Wolf-Rayet galaxies
identified in the study.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 103 570 Positional parameters of Wolf-Rayet galaxies
table4.dat 90 450 Abundance estimates
table5.dat 93 570 Physical parameters
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See also:
J/A+AS/136/35 : WR galaxies and HII regions catalog (Schaerer+ 1999)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [WR]
4- 6 I03 --- WR Running ID (WR NNN)
8- 15 F8.5 --- z Galaxy redshift
17 I1 --- Sc1 [0/1] SciencePrimary (1)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 42 F5.2 arcsec DEs Declination (J2000)
44 I1 --- Cl [2/3] WR classification (2)
46- 50 A5 --- BPT BPT class (3)
52- 65 A14 --- SpecID Spectrum ID (4)
67- 72 I6 --- GInd Garching ID (5)
74-103 A30 --- OName Alternative name
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Note (1): The SCIENCEPRIMARY key from the SDSS. In the paper only
spectra with SCIENCEPRIMARY = 1 are used in most plots.
Note (2): The WR classification is 3 for secure WR galaxies and 2 for
somewhat less secure systems.
Note (3): The BPT class is determined on the basis of the Baldwin, Phillips
& Terlevich (1981PASP...93....5B 1981PASP...93....5B) excitation diagram, as follows:
SF = Star-Forming galaxies
Comp = Composite galaxies, intermediate between the SF and AG classes
AGN = Active Galaxy Nuclei class
Uncl. = unclassified
Note (4): Composed of the SDSS plateID, MJD and fiberID.
Note (5): This is the index into the SDSS datafiles provided at the
http://www.mpa-garching.mpg.de/SDSS site.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [WR]
4- 6 I03 --- WR Running ID (WR NNN)
8- 12 F5.2 --- O(MIX) ?=-9.99 12+LogO/H with mixed abundance estimate
14- 18 F5.2 --- e_O(MIX) ?=-1.00 Estimated error for OHMIX
20- 24 F5.2 --- O(Te) ?=-9.99 12+LogO/H from Te method (1)
26- 30 F5.2 --- e_O(Te) ?=-1.00 Estimated error for OH_Te
32- 36 F5.2 --- O(PP) 12+LogO/H from PP method (2)
38- 42 F5.2 --- e_O(PP) Estimated error for OH_PP
44- 48 F5.2 --- O(CL01) ?=-9.99 12+LogO/H from CL01 method (3)
50- 54 F5.2 --- e_O(CL01) ?=-1.00 Estimated error for OHCL01
56- 60 F5.2 --- N ?=-9.99 12+LogN/H from Te method (1)
62- 66 F5.2 --- e_N ?=-1.00 Estimated error for NH
68- 72 F5.2 --- Ar ?=-9.99 12+LogAr/H from Te method (1)
74- 78 F5.2 --- e_Ar ?=-1.00 Estimated error for ArH
80- 84 F5.2 --- Ne ?=-9.99 12+LogNe/H from Te method (1)
86- 90 F5.2 --- e_Ne ?=-1.00 Estimated error for NeH
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Note (1): The abundances are calculated using the Izotov et al. (2006,
Cat. J/A+A/448/955) fitting formulae for the Te method.
Note (2): The abundances were calculated using the N2 method of Pettini &
Pagel (2004MNRAS.348L..59P 2004MNRAS.348L..59P)
Note (3): The abundances were calculated using the Charlot & Longhetti
(2001MNRAS.323..887C 2001MNRAS.323..887C) models using the method described in Brinchmann
et al. (2004MNRAS.351.1151B 2004MNRAS.351.1151B).
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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- 2 A2 --- --- [WR]
4- 6 I03 --- WR Running ID (WR NNN)
8- 12 F5.2 [W] LBBobs Observed Blue bump luminosity
14- 18 F5.2 [W] e_LBBobs Estimated error for LBBobs
20- 24 F5.2 [W] LRBobs ?=-9.00 Observed Red bump luminosity
26- 30 F5.2 [W] e_LRBobs ?=-1.00 Estimated error for LRBobs
32- 36 F5.2 [W] LBB0 ?=-9.00 Dereddened Blue bump luminosity
38- 42 F5.2 [W] e_LBB0 ?=-1.00 Estimated error for LBBdred
44- 48 F5.2 [W] LRB0 ?=-9.00 Dereddened Red bump luminosity
50- 54 F5.2 [W] e_LRB0 ?=-1.00 Estimated error for LRBdred
56- 61 F6.2 0.1nm EWBB ?=-99.99 Equivalent width of the blue bump
63- 67 F5.2 0.1nm e_EWBB ?=-1.00 Estimated error for EWBB
69- 74 F6.2 0.1nm EWRB ?=-99.99 Equivalent width of the red bump
76- 80 F5.2 0.1nm e_EWRB ?=-1.00 Estimated error for EWRB
82- 87 F6.2 0.1nm WHeII Gaussian width of broad HeII 4686 (1)
89- 93 F5.2 0.1nm e_WHeII ?=-1.000e+00 Error on sigHeII (1)
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Note (1): If the error is less than zero then the width hit an upper fixed
limit and no error estimate could be given.
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Acknowledgements:
Jarle Brinchmann, jarle(at)strw.leidenuniv.nl
History:
* 06-May-2008: Original version
* 11-Aug-2008: table5 reformatted
(End) Jarle Brinchmann [Leiden Observatory], Patricia Vannier [CDS] 06-May-2008