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J/A+A/529/A149      HII regions in low-metallicity galaxies  (Guseva+, 2011)

VLT spectroscopy of low-metallicity emission-line galaxies: abundance patterns and abundance discrepancies. Guseva N.G., Izotov Y.I., Stasinska G., Fricke K.J., Henkel C., Papaderos P. <Astron. Astrophys., 529, A149 (2011)> =2011A&A...529A.149G
ADC_Keywords: H II regions ; Spectroscopy ; Abundances Keywords: galaxies: starburst - methods: observational - galaxies: abundances - galaxies: dwarf - galaxies: ISM Abstract: We present deep spectroscopy of a large sample of low-metallicity emission-line galaxies. The main goal of this study is to derive element abundances in these low-metallicity galaxies. We analyze 121 VLT spectra of HII regions in 46 low-metallicity emission-line galaxies. Of these spectra 83 are archival VLT/FORS1+UVES spectra of HII regions in 31 low-metallicity emission-line galaxies that are studied for the first time with standard direct methods to determine the electron temperatures, the electron number densities, and the chemical abundances. Description: From the ESO archive we selected VLT spectra of HII regions that were obtained with the spectrographs UVES (high resolution) and FORS1 (low and medium resolution). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 95 33 HII regions and galaxies observed with the VLT table2.dat 79 83 Spectroscopic properties of HII regions table3.dat 55 1346 Extinction-corrected emission line fluxes (UVES) table3b.dat 42 31 Hβ fluxes (UVES observations) table4.dat 55 794 Extinction-corrected emission line fluxes (low-resolution FORS observations) table4b.dat 42 22 Hβ fluxes (low-resolution FORS observations) table5.dat 55 1232 Extinction-corrected emission line fluxes (medium-resolution FORS observations) table5b.dat 42 30 Hβ fluxes (medium-resolution FORS observations) table6.dat 53 723 Ionic and total heavy element abundances (UVES) table6b.dat 56 31 Electronic temperatures and column density (UVES) table7.dat 53 466 Ionic and total heavy element abundances (FORS low-resolution observations) table7b.dat 56 22 Electronic temperatures and column density (FORS low-resolution observations) table8.dat 53 764 Ionic and total heavy element abundances (FORS medium-resolution observations) table8b.dat 56 30 Electronic temperatures and column density (FORS medium-resolution observations) table9.dat 96 25 Recombination lines: fluxes and ionic abundances table10a.dat 90 62 Electron temperatures derived from emission line flux ratios table10b.dat 60 56 Electron number densities derived from emission line flux ratios
See also: J/A+A/462/535 : Low-metallicity HII regions and galaxies (Yin+, 2007) J/A+A/464/885 : Abundances in 53 HII regions (Guseva+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name HII region or galaxy name 16- 17 I2 h RAh Right ascension (J2000) 19- 20 I2 min RAm Right ascension (J2000) 22- 25 F4.1 s RAs Right ascension (J2000) 27 A1 --- DE- Declination sign (J2000) 28- 29 I2 deg DEd Declination (J2000) 31- 32 I2 arcmin DEm Declination (J2000) 34- 37 F4.1 arcsec DEs Declination (J2000) 39- 66 A28 --- Inst Instrument used 68- 95 A28 --- Prog ESO program
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19 A1 --- n_Name [egf] Sample (G1) 21- 24 F4.2 10+4K Te(OIII) Electronic temperature of OIII 26- 29 F4.2 10+4K e_Te(OIII) rms uncertainty on Te(OIII) 31- 34 F4.2 --- eps(O) Abundance of O (12+log(O/H)) 36- 39 F4.2 --- e_eps(O) rms uncertainty on 12+logO/H 41- 44 I4 0.1nm W(Ha) Hα equivalent width 46 I1 0.1nm e_W(Ha) rms uncertainty on W(Ha) 49- 54 F6.1 10-19W/m2 F(Hb) Flux of Hβ emission line 56- 58 F3.1 10-19W/m2 e_F(Hb) rms uncertainty on F(Hb) 60- 64 F5.3 --- C(Hb) Hβ extinction coefficient 66- 70 F5.3 --- e_C(Hb) rms uncertainty on C(Hb) 72- 75 F4.1 % RF ?=- Flux ratio F([OIII]4363)/F(Hb) (1) 77- 79 F3.1 % e_RF ? rms uncertainty on RF
Note (1): Fluxes non-corrected for extinction.
Byte-by-byte Description of file: table[345].dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19- 22 I4 --- lambda Wavelength 24- 40 A17 --- Line Line designation 42- 48 F7.2 --- Flux ? Extinction-corrected emission line flux on F(Hβ)=100 scale 51- 55 F5.2 --- e_Flux ?=- rms uncertainty on Flux
Byte-by-byte Description of file: table[345]b.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19- 23 F5.3 --- C(Hb) Hβ extinction coefficient 25- 31 F7.2 10-19W/m2 F(Hb) Flux of Hβ emission line 33- 37 F5.1 0.1nm W(Hb) Hβ equivalent width 39- 42 F4.2 0.1nm W(abs) Absorption equivalent width
Byte-by-byte Description of file: table[678].dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Galaxy name 20- 35 A16 --- Param Parameter name (ICF=Ionization Correction Factor) 38- 45 E8.3 --- Value ?=- Parameter value 47- 53 E7.3 --- e_Value ?=- rms uncertainty on Parameter value
Byte-by-byte Description of file: table[678]b.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19- 23 I5 K Te(OIII) OIII electronic temperature 25- 27 I3 K e_Te(OIII) rms uncertainty on Te(OIII) 29- 33 I5 K Te(OII) OII electronic temperature 35- 37 I3 K e_Te(OII) rms uncertainty on Te(OII) 39- 43 I5 K Te(SIII) SIII electronic temperature 45- 47 I3 K e_Te(SIII) rms uncertainty on Te(SIII) 49- 52 I4 cm-3 Ne(SII) SII electron density 54- 56 I3 cm-3 e_Ne(SII) rms uncertainty on Ne(SII)
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19 A1 --- n_Name [fe] Sample (G1) 21 A1 --- l_F(OII) Limit flag on F(OII) 22- 26 F5.2 10-20W/m2 F(OII) ?=- Flux in OII line 28- 32 F5.2 10-20W/m2 e_F(OII) ? rms uncertainty no F(OII) 34 A1 --- l_F(CII) Limit flag on F(CI) 35- 39 F5.2 10-20W/m2 F(CII) ?=- Flux in CII line 41- 44 F4.2 10-20W/m2 e_F(CII) ? rms uncertainty no F(CII) 46- 52 F7.2 10-19W/m2 F(Hb) Flux in Hβ 54- 57 F4.2 10-19W/m2 e_F(Hb) rms uncertainty on F(Hb) 59 A1 --- l_O++/H+ Limit flag on O++/H+ 60- 64 F5.3 10-4 O++/H+ ?=- Abundance ratio O++/H+ from recombination lines 66- 70 F5.3 10-4 e_O++/H+ ? rms uncertainty on O++/H+ 73- 77 F5.3 10-4 O++/H+c ?=- Abundance ratio O++/H+ from collisionally excited lines 79- 83 F5.3 10-4 e_O++/H+c ? rms uncertainty on O++/H+ 85 A1 --- l_C++/H+ Limit flag on C++/H+ 86- 90 F5.3 10-4 C++/H+ ?=- Abundance ratio C++/H+ from recombination lines 92- 96 F5.3 10-4 e_C++/H+ ? rms uncertainty on C++/H+
Byte-by-byte Description of file: table10a.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name HII region name 19 A1 --- n_Name [egfbc] Sample (G1) 22- 27 F6.4 10+4K Te(OIII) Electronic temperature of OIII 29- 34 F6.4 10+4K e_Te(OIII) rms uncertainty on Te(OIII) 36- 41 F6.4 10+4K Te(SIII) ?=- Electronic temperature of SIII 42 A1 --- u_Te(SIII) Uncertainty flag on Te(SIII) 43- 48 F6.4 10+4K e_Te(SIII) ? rms uncertainty on Te(SIII) 50- 55 F6.4 10+4K Te(NII) ?=- Electronic temperature of NII 57- 62 F6.4 10+4K e_Te(NII) ? rms uncertainty on Te(NII) 64- 69 F6.4 10+4K Te(OII) ?=- Electronic temperature of OII 71- 76 F6.4 10+4K e_Te(OII) ? rms uncertainty on Te(OII) 78- 83 F6.4 10+4K Te(SII) ?=- Electronic temperature of SII 85- 90 F6.4 10+4K e_Te(SII) ? rms uncertainty on Te(SII)
Byte-by-byte Description of file: table10b.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name HII region name 20 A1 --- n_Name [egfb] Sample (G1) 22- 25 I4 cm-3 Ne(SII) SII electron density 27- 29 I3 cm-3 e_Ne(SII) rms uncertainty on Ne(SII) 32- 35 I4 cm-3 Ne(OII) ?=- OII electron density 37- 38 I2 cm-3 e_Ne(OII) ? rms uncertainty on Ne(OII) 41- 44 I4 cm-3 Ne(ClIII) ?=- ClIII electron density 46- 49 I4 cm-3 e_Ne(ClIII) ? rms uncertainty on Ne(ClIII) 52- 55 I4 cm-3 Ne(ArIV) ?=- ArIV electron density 57- 60 I4 cm-3 e_Ne(ArIV) ? rms uncertainty on Ne(ArIV)
Global notes: Note (G1): Samples as follows: e = UVES data f = medium resolution FORS data g = low resolution FORS data b = Izotov et al. (2009A&A...503...61I) c = Guseva et al. (2009A&A...505...63G)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Aug-2011
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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