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J/A+A/421/539     VLT spectroscopy of Tol 1214-277 & Tol 65      (Izotov+, 2004)

Deep VLT spectroscopy of the blue compact dwarf galaxies Tol 1214-277 and Tol 65 Izotov Y.I., Papaderos P., Guseva N.G., Fricke K.J., Thuan T.X. <Astron. Astrophys. 421, 539 (2004)> =2004A&A...421..539I
ADC_Keywords: Galaxies, spectra ; H II regions ; Equivalent widths Keywords: galaxies: starburst - galaxies: abundances - galaxies: individual: Tol 1214-277, Tol 65 Abstract: We present VLT spectroscopic observations with different spectral resolutions and different slit orientations of the two metal-deficient blue compact dwarf (BCD) galaxies Tol 1214-277 and Tol 65. The oxygen abundances in the brightest HII regions of Tol 1214-277 and Tol 65 are found to be 12+logO/H=7.55±0.01 and 7.54±0.01, or Z/24. The nitrogen-to-oxygen abundance ratios in the two galaxies are logN/O=-1.64±0.03 and -1.60±0.02 and lie in the narrow range found for other most metal-deficient BCDs. The helium mass fraction derived in several HII regions in both galaxies is consistent with a high primordial helium mass fraction, Yp∼0.244. We confirm the detection of the high-ionization forbidden emission line [FeV]4227 in the spectrum of Tol 1214-277. Additionally, weak [NeIV]4725, [FeVI]5146,5177, and [FeVII]5721,6087 emission lines are detected in the high-resolution spectrum of Tol 1214-277. The detection of these lines implies the presence of hard radiation with photon energy in the range ∼4-8Ryd. Emission lines are detected in the spectra of eight galaxies in the fields of Tol 1214-277 and Tol 65. Seven of these galaxies are background objects, while one galaxy has a redshift close to that of Tol 1214-277. Situated at a projected distance of ∼14.5kpc from Tol 1214-277, this galaxy is probably a companion of the BCD. Objects: ---------------------------------------------------------------------- RA (2000) DE Designation(s) (Note) ---------------------------------------------------------------------- 12 17 17.1 -28 02 33 Tol 1214-277 (brightest region 1) 12 25 46.9 -36 14 01 Tol 65 = Tol 1223-359 (brightest region 1) ---------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 91 53 Corrected fluxes and equivalent widths of the emission lines in the high-resolution spectra of the brightest HII regions in Tol 1214-277 and Tol 65 table3.dat 92 37 Corrected fluxes and equivalent widths of the emission lines in the low-resolution spectra of the brightest HII regions in Tol 1214-277 table4.dat 92 38 Corrected fluxes and equivalent widths of the emission lines in the low-resolution spectra of the brightest HII regions in Tol 65 addit.dat 55 33 Additional data for tables 2 to 4 table7.dat 26 8 Coordinates of the emission-line galaxies in the fields of Tol 1214-277 and Tol 65 table8.dat 56 26 Parameters of the emission lines in the spectra of galaxies in the fields of Tol 1214-277 and Tol 65
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 0.1nm lambda Non-redshifted wavelength 6- 15 A10 --- Ion Emission-line identification 17- 22 F6.4 --- Flux1 Emission-line flux relative to Hbeta in region 1 of Tol 1214-277 (G1) 24- 29 F6.4 --- e_Flux1 1sigma flux error 31- 36 F6.1 0.1nm EW1 Equivalent width of the emission line in region 1 of Tol 1214-277 38- 40 F3.1 0.1nm e_EW1 Equivalent width 1sigma error 42- 47 F6.4 --- FHbeta1+2 Emission-line flux relative to Hbeta in regions 1+2 of Tol 65 (G1) 49- 54 F6.4 --- e_FHbeta1+2 1sigma flux error 56- 61 F6.1 0.1nm EW1+2 Equivalent width of the emission line in regions 1+2 of Tol 65 63- 65 F3.1 0.1nm e_EW1+2 Equivalent width 1sigma error 67- 72 F6.4 --- Flux3+4 Emission-line flux relative to Hbeta in regions 3+4 of Tol 65 (G1) 74- 79 F6.4 --- e_Flux3+4 1sigma flux error 81- 86 F6.1 0.1nm EW3+4 Equivalent width of the emission line in regions 3+4 of Tol 65 88- 90 F3.1 0.1nm e_EW3+4 Equivalent width 1sigma error
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 0.1nm lambda Non-redshifted wavelength 6- 15 A10 --- Ion Emission-line identification 17- 21 F5.3 --- Flux1a Emission-line flux relative to Hbeta in region 1 of Tol 1214-277 observed in 1999 (G1) 23- 27 F5.3 --- e_Flux1a 1sigma flux error 29- 34 F6.1 0.1nm EW1a Equivalent width of the emission line in region 1 of Tol 1214-277 observed in 1999 36- 40 F5.3 --- Flux1b Emission-line flux relative to Hbeta in region 1 of Tol 1214-277 observed in 2000 (G1) 42- 46 F5.3 --- e_Flux1b 1sigma flux error 48- 53 F6.1 0.1nm EW1b Equivalent width of the emission line in region 1 of Tol 1214-277 observed in 2000 55- 59 F5.3 --- Flux2a Emission-line flux relative to Hbeta in region 2 of Tol 1214-277 observed in 1999 (G1) 61- 65 F5.3 --- e_Flux2a 1sigma flux error 67- 72 F6.1 0.1nm EW2a Equivalent width of the emission line in region 2 of Tol 1214-277 observed in 1999 74- 78 F5.3 --- Flux2b Emission-line flux relative to Hbeta in region 2 of Tol 1214-277 observed in 2000 (G1) 80- 84 F5.3 --- e_Flux2b 1sigma flux error 86- 91 F6.1 0.1nm EW2b Equivalent width of the emission line in region 2 of Tol 1214-277 observed in 2000
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 0.1nm lambda Non-redshifted wavelength 6- 15 A10 --- Ion Emission-line identification 17- 21 F5.3 --- Flux1 Emission-line flux relative to Hbeta in region 1 of Tol 65 (G1) 23- 27 F5.3 --- e_Flux1 1sigma flux error 29- 34 F6.1 0.1nm EW1 Equivalent width of the emission line in region 1 of Tol 65 36- 40 F5.3 --- Flux2 Emission-line flux relative to Hbeta in region 2 of Tol 65 (G1) 42- 46 F5.3 --- e_Flux2 1sigma flux error 48- 53 F6.1 0.1nm EW2 Equivalent width of the emission line in region 2 of Tol 65 55- 59 F5.3 --- Flux3 Emission-line flux relative to Hbeta in region 3 of Tol 65 (G1) 61- 65 F5.3 --- e_Flux3 1sigma flux error 67- 72 F6.1 0.1nm EW3 Equivalent width of the emission line in region 3 of Tol 65 74- 78 F5.3 --- Flux4 Emission-line flux relative to Hbeta in region 4 of Tol 65 (G1) 80- 84 F5.3 --- e_Flux4 1sigma flux error 86- 91 F6.1 0.1nm EW4 Equivalent width of the emission line in region 4 of Tol 65 (G1)
Byte-by-byte Description of file: addit.dat
Bytes Format Units Label Explanations
1 I1 --- Table [2/4] Table number 3- 14 A12 --- Gal Galaxy name 16- 17 A2 --- Res Type of spectral resolution (HR or LR) 19- 26 A8 --- Param Parameter (1) 29- 31 A3 --- Region Region number in the galaxy 32 A1 --- Year [ab] Year of observation a=1999, b=2000 34- 38 F5.3 --- Value Value of the parameter 40- 44 F5.3 --- e_Value rms uncertainty on Value 46- 55 A10 --- x_Value Unit of the Value parameter
Note (1): The parameters are: F(Hbeta): Observed Hbeta flux, in 10-7W/s/m2 C(Hbeta): Extinction coefficient, in dex EW(abs): Equivalent width of hydrogen absorption lines, in 0.1nm
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Gal Galaxy name (g1 to g8) 5- 6 I2 h RAh Right ascension (J2000.0) 8- 9 I2 min RAm Right ascension (J2000.0) 11- 14 F4.1 s RAs Right ascension (J2000.0) 17 A1 --- DE- Declination sign (J2000.0) 18- 19 I2 deg DEd Declination (J2000.0) 21- 22 I2 arcmin DEm Declination (J2000.0) 24- 25 I2 arcsec DEs Declination (J2000.0)
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Gal Galaxy name (g1 to g8) (1) 4- 7 I4 0.1nm lambda Non-redshifted wavelength 9- 18 A10 --- Ion Emission-line identification 20- 25 F6.1 0.1nm Lobs Observed wavelength 27- 29 F3.1 0.1nm e_Lobs 1sigma error of the observed wavelength 31- 35 F5.1 10-20W/m2/s Flux Observed flux 37- 39 F3.1 10-20W/m2/s e_Flux 1sigma error of the observed flux 41- 43 I3 0.1nm EW Equivalent width of the emission line 45- 46 I2 0.1nm e_EW 1sigma error of the equivalent width 48- 53 F6.4 --- z Redshift
Note (1): Galaxy designations: g1-g4: galaxies in Tol 1214-277, [FIP2001] GN, N=1-3, in Simbad g5-g8: galaxies in Tol 65
Global notes: Note (G1): Fluxes are corrected for underlying stellar absorption (for hydrogen lines) and interstellar extinction.
Acknowledgements: Yuri Izotov
(End) Patricia Bauer [CDS] 13-Apr-2004
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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