J/AJ/147/131 Abundances of nearby late-type galaxies. I. Data (Pilyugin+, 2014) ================================================================================ The abundance properties of nearby late-type galaxies. I. The data. Pilyugin L.S., Grebel E.K., Kniazev A.Y. =2014AJ....147..131P ================================================================================ ADC_Keywords: Galaxies, nearby ; H II regions ; Abundances ; Morphology Keywords: galaxies: abundances - galaxies: irregular - galaxies: ISM - galaxies: spiral Abstract: We investigate the oxygen and nitrogen abundance distributions across the optical disks of 130 nearby late-type galaxies using around 3740 published spectra of HII regions. We use these data in order to provide homogeneous abundance determinations for all objects in the sample, including HII regions in which not all of the usual diagnostic lines were measured. Examining the relation between N and O abundances in these galaxies we find that the abundances in their centers and at their isophotal R_25_ disk radii follow the same relation. The variation in N/H at a given O/H is around 0.3dex. We suggest that the observed spread in N/H may be partly caused by the time delay between N and O enrichment and the different star formation histories in galaxies of different morphological types and dimensions. We study the correlations between the abundance properties (central O and N abundances, radial O and N gradients) of a galaxy and its morphological type and dimension. Description: Our final sample includes 130 nearby late-type galaxies (Table1). We have carried out an extensive search of the literature and compiled a sample of measurements of HII regions in the nearby late-type galaxies. We have searched for spectra of HII regions with the requirement that they include the [OII]{lambda}3727+{lambda}3729, [OIII]{lambda}5007, [NII]{lambda}6584, and [SII]{lambda}6717+{lambda}6731 lines. Our list contains 3904 spectra including 162 spectra of HII regions beyond the isophotal radius R_25_. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 74 130 The adopted properties of our galaxies table2.dat 97 130 The derived parameters of the radial oxygen and nitrogen abundance distributions in galaxies table3.dat 80 288 List of references for the emission line flux measurements in the extragalactic HII regions refs.dat 189 91 Other references -------------------------------------------------------------------------------- See also: V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012) J/ApJS/153/429 : SDSS strong emission line HII galaxies (Kniazev+, 2004) J/MNRAS/424/2316 : Abundances in HII regions (Pilyugin+, 2012) http://atlas.obs-hp.fr/hyperleda/ : HyperLeda database http://www.sdss3.org/ : The SDSS-III Web site Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- Name Galaxy name (1) 11- 15 A5 --- MType Morphological type from LEDA (VII/237) 16- 19 F4.1 --- TT Morphological type code from LEDA (VII/237) 21- 30 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) (2) 32- 41 F10.6 deg DEdeg Declination in decimal degrees (J2000) (2) 43- 47 F5.2 arcmin R25a The isophotal radius (3) 48 A1 --- r_R25a Reference for R25; in refs.dat file 50- 52 I3 deg PA Position angle 54- 55 I2 deg i Inclination 57- 58 I2 --- r_i ? Reference for PA and i; in refs.dat file 60- 65 F6.2 Mpc Dist Distance 67- 68 I2 --- r_Dist Reference for Dist 70- 74 F5.2 kpc R25k The isophotal radius in kpc (4) -------------------------------------------------------------------------------- Note (1): We have used the most widely used name for each galaxy. The galaxies are listed in order of name category, with the following categories in descending order: NGC=New General Catalogue, IC=Index Catalogue, UGC=Uppsala General Catalog of Galaxies, PGC=Catalogue of Principal Galaxies. Note (2): From the NASA/IPAC Extragalactic Database (NED, http://ned.ipac.caltech.edu/). Note (3): Unless otherwise stated, the R_25_ values are taken from de Vaucouleurs et al. (1991rc3..book.....D). Note (4): Estimated from the data in Columns R25a and Dist. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- Name Galaxy name 11- 14 F4.2 [-] [O/H] [7.5/9.0] Oxygen abundance at R_0_=0 (5) 16- 19 F4.2 [-] e_[O/H] Uncertainty in [O/H] 21- 26 F6.3 [-] C[O/H]1 [-0.9/0.3] O/H gradient normalized to the disk's isophotal radius R_25_ (6) 28- 32 F5.3 [-] e_C[O/H]1 Uncertainty in C[O/H]1 34- 40 F7.4 [-] C[O/H]2 Oxygen abundance gradient expressed in terms of dex/kpc 42- 47 F6.4 [-] e_C[O/H]2 Uncertainty in C[O/H]2 49- 53 F5.3 [-] s_[O/H] [0/0.1] Scatter of oxygen abundances around the general radial oxygen abundance trend 55- 58 F4.2 [-] [N/H] [6.0/8.9]?=0 Nitrogen abundance at R_0_=0 (7) 60- 63 F4.2 [-] e_[N/H] Uncertainty in [N/H] 65- 70 F6.3 [-] C[N/H]1 N/H gradient normalized to the disk's isophotal radius R_25_ (8) 72- 76 F5.3 [-] e_C[N/H]1 Uncertainty in C[N/H]1 78- 84 F7.4 [-] C[N/H]2 Nitrogen abundance expressed in terms of dex/kpc 86- 91 F6.4 [-] e_C[N/H]2 Uncertainty in C[N/H]2 93- 97 F5.3 [-] s_[N/H] The scatter of nitrogen abundances around the general radial nitrogen abundance trend -------------------------------------------------------------------------------- Note (5): Extrapolated central 12+log(O/H)R_0_ oxygen abundance. 12+log(O/H)=12+log(O/H)_R0_+C_O/H_*(R/R_25_), where R/R_25_ is the fractional radius (the galactocentric distance normalized to the disk's isophotal radius R_25_) (Equation (5) in the paper). Note (6): The slope of the oxygen abundance gradient expressed in terms of dex/R_25_ (the coefficient C_O/H_ in Equation (5)). Note (7): Extrapolated central 12+log(N/H)R_0_ nitrogen abundance. 12+log(N/H)=12+log(N/H)_R0_+C_N/H_*(R/R_25_) (Equation (6) in the paper). Note (8): The slope of the nitrogen abundance gradient expressed in terms of dex/R_25_ (the coefficient C_N/H_ in Equation (6)). -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name Galaxy name 11- 14 A4 --- OName Other name 16- 34 A19 --- BibCode Bibliographic code 36- 59 A24 --- Aut Author's name 61- 64 A4 --- --- [Cat.] 66- 80 A15 --- Cat VizieR catalog designation -------------------------------------------------------------------------------- Byte-by-byte Description of file: refs.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 A2 --- Ref Reference identifier 4- 22 A19 --- BibCode Bibliographic code 24- 49 A26 --- Aut Author's name 51-189 A139 --- Com Comments -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Sylvain Guehenneux [CDS] 26-Sep-2014