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J/MNRAS/403/896     Line intensities of SDSS HII regions  (Pilyugin+, 2010)

The electron temperatures of SDSS high-metallicity giant extragalactic HII regions. Pilyugin L.S., Vilchez J.M., Cedres B., Thuan T.X. <Mon. Not. R. Astron. Soc., 403, 896-905 (2010)> =2010MNRAS.403..896P
ADC_Keywords: H II regions ; Spectroscopy ; Abundances Keywords: ISM: abundances - HII regions - galaxies: abundances Abstract: Spectra of high-metallicity [12+log(O/H)≳8.2] HII regions, where oxygen auroral lines are measurable in both the O+ and O++ zones, have been extracted from the Data Release 6 of the Sloan Digital Sky Survey (SDSS). Our final sample consists of 181 SDSS spectra of HII regions in galaxies in the redshift range from ∼0.025 to ∼0.17. The t2,O-t3,O diagram is examined. In the SDSS HII regions, the electron temperature t2,O is found to have a large scatter at a given value of the electron temperature t3,O. The majority of the SDSS HII regions lie below the t2,O-t3,O relation derived for HII regions in nearby galaxies, i.e. the positions of the SDSS HII regions show a systematic shift towards lower t2,O temperatures or/and towards higher t3,O temperatures. The scatter and shift of the SDSS HII regions in the t2,O-t3,O diagram can be understood if they are composite nebulae excited by two or more ionizing sources of different temperatures. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 92 181 Dereddened line intensities and electron temperatures of a sample of HII regions in SDSS galaxies
See also: J/ApJS/153/429 : SDSS strong emission line HII galaxies (Kniazev+, 2004) : SDSS Home Page Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/181] Sequential number 5- 6 I2 h RAh Right ascension (J2000) 8- 9 I2 min RAm Right ascension (J2000) 11- 15 F5.2 s RAs Right ascension (J2000) 17 A1 --- DE- Declination sign (J2000) 18- 19 I2 deg DEd Declination (J2000) 21- 22 I2 arcmin DEm Declination (J2000) 24- 27 F4.1 arcsec DEs Declination (J2000) 29- 32 I4 --- Plate Spectrum SDSS Plate number 34- 38 I5 --- MJD Spectrum SDSS MJD number 40- 42 I3 --- Fiber Spectrum SDSS Fiber number 44- 48 F5.3 --- [OII]1 Line intensity of [OII]3727 (1) 50- 55 F6.4 --- [OIII]1 Line intensity of [OII]4363 (1) 57- 61 F5.3 --- [OIII]2 Line intensity of [OII]4959+5007 (1) 63- 67 F5.3 --- [SII]1 Line intensity of [SII]6717 (1) 69- 73 F5.3 --- [SII]2 Line intensity of [SII]6731 (1) 75- 80 F6.4 --- [OII]2 Line intensity of [OII]7325 (1) 82- 86 F5.3 10+4K t3,O Electron temperature within the [OIII] zone 88- 92 F5.3 10+4K t2,O Electron temperature within the [OII] zone
Note (1): The line intensities are given on a scale in which Hβ=1.
History: * 21-Oct-2010: From electronic version of the journal * 27-May-2011: Positions of objects No 10, 69, 102 and 179 corrected with SDSS positions based on MJD-Plate-Fiber.
(End) Patricia Vannier [CDS] 24-Sep-2010
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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