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J/A+A/488/1167 Photometry of bulges at intermediate z (Dominguez-Palmero+, 2008)

Bulges of disk galaxies at intermediate redshifts. I. Samples with and without bulges in the Groth Strip Survey. Dominguez-Palmero L., Balcells M., Erwin P., Prieto M., Cristobal-Hornillos D., Eliche-Moral M.C., Guzman R. <Astron. Astrophys. 488, 1167 (2008)> =2008A&A...488.1167D
ADC_Keywords: Galaxy catalogs ; Galaxies, photometry ; Photometry, HST ; Photometry, surface ; Colors ; Redshifts Keywords: galaxies: bulges - galaxies: evolution - galaxies: formation - galaxies: fundamental parameters - galaxies: high-redshift - galaxies: photometry Abstract: Analysis of bulges to redshifts of up to z=1 have provided ambiguous results as to whether bulges as a class are old structures akin to elliptical galaxies or younger products of the evolution of their host disks. We aim to define a sample of intermediate-z disk galaxies harbouring central bulges, and a complementary sample of disk galaxies without measurable bulges. We intend to provide colour profiles for both samples, as well as measurements of nuclear, disk, and global colours, which may be used to constrain the relative ages of bulges and disks. We select a diameter-limited sample of galaxies in images from the HST/WFPC2 (Wide-Field Planetary Camera 2 at the Hubble Space Telescope) Groth Strip survey, which is divided into two subsamples of higher and lower inclination to assess the role of dust in the measured quantities. Mergers are visually identified and excluded. We take special care to control the pollution by ellipticals. The bulge sample is defined with a criterion based on nuclear surface brightness excess over the inward extrapolation of the exponential law fitted to the outer regions of the galaxies. We extract colour profiles on the semi-minor axis least affected by dust in the disk, and measure nuclear colours at 0.85kpc from the centre over those profiles. Disk colours are measured on major axis profiles; global colours are obtained from 2.6" diameter apertures. Colour transformations and K-corrections are calculated using SEDs covering bands UBVIJK, from the GOYA photometric survey. We obtain a parent sample containing 248 galaxies with known redshifts, spectroscopic or photometric, spanning 0.1<z<1.2. The bulge subsample comprises 54 galaxies (21.8% of the total), while the subsample with no measureable bulges is 55.2% of the total (137 galaxies). The remainder (23%) is composed of mergers. We list nuclear, disk, and global colours (observed and rest-frame) and magnitudes (apparent and absolute), as well as galaxy colour gradients for the samples with and without bulges, and make them available in electronic format. We also provide images, colour maps, plots of spectral energy distributions, major-axis surface brightness profiles, and minor-axis colour profiles for both samples. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 70 54 Bulge sample data tablea2.dat 70 137 Non-bulge sample data tablea3.dat 67 54 Bulge sample colours tablea4.dat 67 137 Non-bulge sample colours tablea5.dat 43 54 Bulge sample colour gradients tablea6.dat 43 137 Non-bulge sample colour gradients
See also: J/ApJS/159/41 : DEEP Groth Strip Survey. I. (Vogt+, 2005) J/ApJS/142/1 : DEEP Groth Strip Survey. II. (Simard+, 2002) J/ApJ/599/1006 : DEEP Groth Strip Survey. VII. (Kobulnicky+, 2003) J/ApJS/157/175 : DEEP Groth Strip Survey. VIII. (Koo+, 2005) J/ApJ/571/136 : DEEP Groth Strip survey. X. (Im+, 2002) J/MNRAS/356/568 : Deep Chandra survey of Groth Strip (Nandra+, 2005) J/MNRAS/371/221 : Deep Chandra survey of Groth Strip. II. (Georgakakis+, 2006) Byte-by-byte Description of file: tablea1.dat tablea2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Source number identification 6- 23 A18 --- Name Source name, based on J2000 coordinates (HHMMSS.ss+DDMMSS.s) 25- 30 F6.4 --- z Source redshift 32 I1 --- q_z [1/2] Redshift quality: 1=spectroscopic, 2=photometric 34- 37 F4.2 arcsec R Source semi-major axis in arcsec from SExtractor A size parameter 39- 42 F4.2 --- e Source ellipticity from SExtractor (1-b/a) 44- 45 A2 --- Sample [hi li] Subsample from which the source comes: hi = high-inclination sample li = low-inclination sample 47- 51 F5.2 mag I814 Total I814 magnitude of galaxy from SExtractor MAG_BEST magnitude 53- 56 F4.2 mag e_I814 Error in total I814 magnitude of galaxy 58- 63 F6.2 mag BMAG Galaxy absolute magnitude in B-band (1) 65- 70 F6.2 mag RMAG Galaxy absolute magnitude in R-band (1)
Note (1): The total errors in galaxy absolute magnitude come from the sum in quadrature of the measured error in observed F814W magnitude and the error derived from redshift uncertainty and SED choice (see Sect. 5.4)
Byte-by-byte Description of file: tablea3.dat tablea4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Source number identification 6- 9 F4.2 mag (V-I)b Observed nuclear (V606-I814) colour index, measured at 0.85kpc from the centre 11- 14 F4.2 mag e_(V-I)b Error in observed nuclear (V606-I814) colour 16- 19 F4.2 mag (V-I)d ?=- Observed disk (V606-I814) colour, measured in the range between 1 and 2 times the scale length of the exponential law fit to the outer regions of the galaxies 21- 24 F4.2 mag e_(V-I)d ?=- Error in observed disk (V606-I814) colour index 26- 29 F4.2 mag (V-I)g Observed global (V606-I814) colour index, measured within a 2.6" diameter aperture 31- 34 F4.2 mag e_(V-I)g Error in observed global (V606-I814) colour index (1) 36- 40 F5.2 mag (U-B)b Rest-frame nuclear (U-B) colour index 42- 46 F5.2 mag (U-B)d ?=- Rest-frame disk (U-B) colour index 48- 52 F5.2 mag (U-B)g Rest-frame global (U-B) colour index 54- 57 F4.2 mag (B-R)b Rest-frame nuclear (B-R) colour index 59- 62 F4.2 mag (B-R)d ?=- Rest-frame disk (B-R) colour index 64- 67 F4.2 mag (B-R)g Rest-frame global (B-R) colour index
Note (1): The total errors in rest-frame colours come from the sum in quadrature of the measured error in observed (V606-I814) colour and the error derived from the colour transformation (see Sect. 5.4).
Byte-by-byte Description of file: tablea5.dat tablea6.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Source number identification 6- 11 F6.3 mag/kpc g(V-I)b Colour gradient(V606-I814) calculated over the bluer semi-minor axes colour profile (1) 13- 17 F5.3 mag/kpc e_g(V-I)b Error in g(V-I)b (2) 19- 24 F6.3 mag/kpc g(V-I)r Colour gradient(V606-I814) calculated over the redder semi-minor axes colour profile (1) 26- 30 F5.3 mag/kpc e_g(V-I)r Error on g(V-I)r (2) 32- 37 F6.3 mag/kpc g(V-I)s Colour gradient(V606-I814) calculated over the averaged semi-major axes colour profile (1) 39- 43 F5.3 mag/kpc e_g(V-I)s Error on g(V-I)s (2)
Note (1): The colour gradients are measured in magnitudes per deprojected kpc. Note (2): The errors are the 1-sigma uncertainty estimates for the returned parameters of the linear fits.
Acknowledgements: L. Dominguez-Palmero, ldp(at)iac.es
(End) Patricia Vannier [CDS] 04-Jul-2008
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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