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J/ApJ/680/70      Distant spheroids in the GOODS fields       (Macarthur+, 2008)

The evolutionary history of galactic bulges: photometric and spectroscopic studies of distant spheroids in the GOODS fields. MacArthur L.A., Ellis R.S., Treu T., U V., Bundy K., Moran S. <Astrophys. J., 680, 70-91 (2008)> =2008ApJ...680...70M
ADC_Keywords: Galaxies, spectra ; Redshifts ; Photometry, HST ; Morphology ; Velocity dispersion Keywords: cosmology: observations - galaxies: bulges - galaxies: evolution - galaxies: formation - galaxies: high-redshift Abstract: We report on the first results of a new study aimed at understanding the diversity and evolutionary history of distant galactic bulges in the context of now well-established trends for pure spheroidal galaxies. To this end, bulges have been isolated for a sample of 137 spiral galaxies within the redshift range 0.1<z<1.2 in the GOODS fields. Using proven photometric techniques, we determine the characteristic parameters (size, surface brightness, profile shape) of both the disk and bulge components in our sample. In agreement with earlier work that utilized aperture colors, distant bulges show a broader range of optical colors than would be the case for passively evolving populations. To quantify the amount of recent star formation necessary to explain this result, we used DEIMOS to secure stellar velocity dispersions for a sizeable fraction of our sample. This has enabled us to compare the fundamental plane of our distant bulges with that for spheroidal galaxies in a similar redshift range. Description: The primary data set for this study is the GOODS public v1.0 data release (Giavalisco et al., 2004, Cat. II/261), which provides deep imaging in four ACS passbands: F435W (B), F606W (V), F775W (i), and F850LP (z). The spectroscopic observations used here were taken with DEIMOS on the Keck II Telescope. The data set comprises a total exposure time of 5-7hr spanning three observing campaigns in 2004 March, 2004 December, and 2005 March. Most of the data were obtained in seeing conditions in the range of 0.8"-1.0" (FWHM). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 193 Galaxy sample parameters table3.dat 70 193 Spheroid photometric parameters table4.dat 73 147 Fundamental plane parameters
See also: II/261 : GOODS initial results (Giavalisco+, 2004) VII/246 : GOODS Morphological Catalog (Bundy+, 2005) J/ApJ/551/111 : HDF early-type and spiral galaxies (Ellis+, 2001) J/ApJS/157/175 : DEEP Groth Strip Survey. VIII. (Koo+, 2005) J/ApJ/633/174 : Spheroidals and bulge dominated galaxies (Treu+, 2005) J/ApJ/635/243 : Sample of GOODS/CDFS early-type galaxies (Ferreras+, 2005) J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [TEL2005] Internal galaxy identification (1) 6- 15 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 17- 26 F10.6 deg DEdeg Declination in decimal degrees (J2000) 28- 33 F6.4 --- z Spectroscopic redshift 35- 36 I2 --- T Treu et al. (2005ApJ...622L...5T; 2005, Cat. J/ApJ/633/174) morphology type 38 I1 --- Nc [1,2] Number of components in decomposition (2) 40- 44 F5.3 --- B/T Bulge-to-total luminosity ratio 46- 50 F5.2 mag Bmag ? HST/ACS F435W filter AB magnitude 52- 56 F5.2 mag Vmag HST/ACS F606W filter AB magnitude 58- 62 F5.2 mag imag HST/ACS F775W filter AB magnitude 64- 68 F5.2 mag zmag HST/ACS F850LP filter AB magnitude
Note (1): The first object named [TEL2005] 793 in the table, at 53.131104-27.829250 is in fact GOODS J033231.47-274945.3. The second object [TEL2005] 793 is indeed at 189.235962+62.205502. Note (2): Number of Sersic profiles: 1 = single Sersic profile in fit; 2 = simultaneous Sersic bulge plus exponential disk decomposition.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [TEL2005] Internal galaxy identification 6- 8 F3.1 --- nB ? F435W band Sersic n shape parameter 10- 13 F4.2 arcsec reB ? F435W band effective radius 15- 19 F5.2 mag/arcsec2 mueB ? F435W band uncorrected effective surface brightness 21- 23 F3.1 --- nV ? F606W band Sersic n shape parameter 25- 28 F4.2 arcsec reV ? F606W band effective radius 30- 34 F5.2 mag/arcsec2 mueV ? F606W band uncorrected effective surface brightness 36- 38 F3.1 --- ni ? F775W band Sersic n shape parameter 40- 43 F4.2 arcsec rei ? F775W band effective radius 45- 49 F5.2 mag/arcsec2 muei ? F775W band uncorrected effective surface brightness 51- 53 F3.1 --- nz ? F850LP band Sersic n shape parameter 55- 58 F4.2 arcsec rez ? F850LP band effective radius 60- 64 F5.2 mag/arcsec2 muez ? F850LP band uncorrected effective surface brightness 66- 70 F5.2 mag V-i ? Observed (F606W-F775W) color index measured to one effective radius
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [TEL2005] Internal galaxy identification 6- 8 F3.1 --- n Sersic n shape parameter 10- 12 F3.1 --- e_n Error in n 14- 17 F4.2 kpc Re Effective radius 19- 22 F4.2 kpc e_Re Error in Re 24- 28 F5.2 mag/arcsec2 SBe Average restframe B-band surface brightness within Re 30- 33 F4.2 mag/arcsec2 e_SBe Error in SBe 35- 39 F5.1 km/s sigma Velocity dispersion in 1x0.1185" aperture 41- 44 F4.1 km/s e_sigma Error in sigma 46- 51 F6.2 mag BMAG Total restframe spheroid B-band AB absolute magnitude 53- 57 F5.2 [Msun/solLum] logM/L Log of total spheroid B band mass-to-light ratio 59- 62 F4.2 [Msun/solLum] e_logM/L Error in logM/L 64- 68 F5.2 [Msun] logM Log of spheroid dynamical stellar mass 70- 73 F4.2 [Msun] e_logM Error in logM
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 12-Oct-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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