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J/A+A/608/A127      Breaks in disc galaxy abundance gradients  (Pilyugin+, 2017)

Breaks in surface brightness profiles and radial abundance gradients in the discs of spiral galaxies. Pilyugin L.S., Grebel E.K., Zinchenko I.A., Nefedyev Y.A., Vilchez J.M. <Astron. Astrophys. 608, A127 (2017)> =2017A&A...608A.127P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Interstellar medium ; Abundances Keywords: ISM: abundances - galaxies: abundances - galaxies: spiral - galaxies: structure Abstract: We examine the relation between breaks in the surface brightness profiles and radial abundance gradients within the optical radius in the discs of 134 spiral galaxies from the CALIFA survey. The distribution of the radial abundance (in logarithmic scale) in each galaxy was fitted by simple and broken linear relations. The surface brightness profile was fitted assuming pure and broken exponents for the disc. We find that the maximum absolute difference between the abundances in a disc given by broken and pure linear relations is less than 0.05dex in the majority of our galaxies and exceeds the scatter in abundances for 26 out of 134 galaxies considered. The scatter in abundances around the broken linear relation is close (within a few percent) to that around the pure linear relation. The breaks in the surface brightness profiles are more prominent. The scatter around the broken exponent in a number of galaxies is lower by a factor of two or more than that around the pure exponent. The shapes of the abundance gradients and surface brightness profiles within the optical radius in a galaxy may be different. A pure exponential surface brightness profile may be accompanied by a broken abundance gradient and vise versa. There is no correlation between the break radii of the abundance gradients and surface brightness profiles. Thus, a break in the surface brightness profile does not need to be accompanied by a break in the abundance gradient. Description: We constructed maps of the oxygen abundance in the discs of 134 spiral galaxies using the 2D spectroscopy of the DR3 of the CALIFA survey. Table 1 reports the adopted and derived parameter of galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 259 134 Parameters of the sample galaxies
See also: J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015) J/A+A/584/A87 : CALIFA sample SFR calibration (Catalan-Torrecilla+, 2015) J/A+A/585/A47 : CALIFA color/metallicity gradients connections (Marino+, 2016) J/A+A/587/A70 : CALIFA face-on spiral gal. oxygen (Sanchez-Menguiano+, 2016) J/A+A/595/A62 : CALIFA galaxies O/H and N/O slopes (Perez-Montero+, 2016) J/A+A/597/A48 : Stellar kinematics in CALIFA survey (Falcon-Barroso+, 2017) J/A+A/598/A32 : 2D decomposition of CALIFA galaxies (Mendez-Abreu+, 2017) J/A+A/604/A4 : CALIFA galaxies observational hints (Ruiz-Lara+, 2017) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name NED name of the galaxy 13- 16 A4 --- Mtype morphological type of galaxy 17- 20 F4.1 --- Tcode morphological T code 21- 31 F11.6 deg RAdeg Right ascension (J2000.0) 32- 42 F11.6 deg DEdeg Declination (J2000.0) 43- 48 F6.1 deg i Inclination angle 49- 54 F6.1 deg PA Position angle of major axis 55- 60 F6.1 Mpc d Distance 61- 65 F5.2 arcmin R25min Optical radius R25 in arcmin 66- 71 F6.2 kpc R25kpc Optical radius R25 in kpc 72- 77 F6.3 --- OHo Central oxygen abundance at linear relation 78- 83 F6.3 --- e_OHo Error of OHo 84- 90 F7.3 --- grad Abundance gradient at linear relation (in dex/R25 unit) 91- 96 F6.3 --- e_grad Error of grad (in dex/R25 unit) 97-103 F7.4 --- sigmaOHp Scatter in abundance around linear relation 104-108 I5 --- n Number of abundance data points 109-114 F6.3 --- b1 OHo of inner part of broken linear relation 115-120 F6.3 --- e_b1 Error in b1 121-127 F7.3 --- a1 Abundance gradient of inner part of broken linear relation (in dex/R25 unit) 128-133 F6.3 --- e_a1 Error in a1 (in dex/R25 unit) 134-139 F6.3 --- b2 OHo of outer part of broken linear relation 140-145 F6.3 --- e_b2 Error in b2 146-152 F7.3 --- a2 Abundance gradient of outer part of broken linear relation (in dex/R25 unit) 153-158 F6.3 --- e_a2 Error in a2 (in dex/R25 unit) 159-163 F5.2 --- RbOH Break radius in broken linear relation (in R25 unit) 164-170 F7.4 --- sigmaOHb Scatter in abundance around broken linear relation (in dex) 171-177 F7.1 Lsun/pc2 SRep Bulge surface brightness at effective radius in pure exponential 178-182 F5.2 kpc Rep Effective radius in pure exponential 183-186 F4.1 --- np Shape parameter in pure exponential 187-193 F7.1 Lsun/pc2 Sdop Central disc surface brightness in pure exponential 194-199 F6.2 kpc hp Disc scale length in pure exponential 200-205 F6.3 --- sigmaSBp Scatter in surface brightness around pure exponential 206-212 F7.1 Lsun/pc2 SReb Bulge surface brightness at effective radius in broken exponential 213-217 F5.2 kpc Reb Effective radius in broken exponential 218-221 F4.1 --- nb Shape parameter in broken exponential 222-228 F7.1 Lsun/pc2 Sdob1 Central surface brightness of the inner disc in broken exponential 229-234 F6.2 kpc hb1 Inner disc scale length in broken exponential 235-241 F7.1 Lsun/pc2 Sdob2 Central surface brightness of the outer disc in broken exponential 242-247 F6.2 kpc hb2 Outer disc scale length in broken exponential 248-253 F6.2 kpc RbSB Break radius in broken exponential 254-259 F6.3 --- sigmaSBb Scatter in surface brightness around broken exponential
Acknowledgements: Leonid Pilyugin, pil620a(at)gmail.com References: CALIFA, the Calar Alto Legacy Integral Field Area survey: Sanchez et al., Paper I, 2012A&A...538A...8S Husemann et al. Paper II 2013A&A...549A..87H Garcia-Benito et al., Paper III 2015A&A...576A.135G, Cat. J/A+A/576/A135 Sanchez et al., Paper IV 2016A&A...594A..36S
(End) Patricia Vannier [CDS] 11-Oct-2017
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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