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J/ApJ/693/507         Stars of Lyman break galaxies at z∼5         (Yabe+, 2009)

The stellar populations of Lyman break galaxies at z ∼ 5. Yabe K., Ohta K., Iwata I., Sawicki M., Tamura N., Akiyama M., Aoki K. <Astrophys. J., 693, 507-533 (2009)> =2009ApJ...693..507Y
ADC_Keywords: Photometry, VRI ; Photometry, infrared ; Galaxies, optical ; Stars, masses ; Stars, ages Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: luminosity function, mass function - galaxies: stellar content Abstract: We present the results of spectral energy distribution (SED) fitting analysis for Lyman break galaxies (LBGs) at z∼5 in the Great Observatories Origins Deep Survey North (GOODS-N) and its flanking fields (the GOODS-FF). With the publicly available Infrared Array Camera (IRAC) images in the GOODS-N and IRAC data in the GOODS-FF, we constructed the rest-frame UV to optical SEDs for a large sample (∼100) of UV-selected galaxies at z∼5. Comparing the observed SEDs with model SEDs generated with a population synthesis code, we derived a best-fit set of parameters (stellar mass, age, color excess, and star formation rate) for each of the sample LBGs. The derived stellar masses range from 108 to 1011M with a median value of 4.1x109M. Description: The optical imaging data (V, Ic, and z' filters) used in this work are taken from Iwata et al. (2007MNRAS.376.1557I). They carried out deep and wide imaging observations of two independent blank fields, namely, the field including the GOODS-N and the J005325+1234 field, with the Suprime-Cam attached to the Subaru Telescope. A part of the Subaru imaging area was observed with the IRAC. We use the publicly available GOODS-N IRAC data in this work. We use the First Data Release (DR1) and the Second Data Release (DR2) of IRAC data products from the GOODS Spitzer Legacy Science program, which consist of imaging data in 3.6, 4.5, 5.8, and 8.0um passbands. In addition to the GOODS-N data, we obtained IRAC data for the GOODS-FF in 2005 December and 2006 June as General Observer (GO) program 20218. Objects: ----------------------------------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------------------------------- 12 36 49.5 +62 12 58 NAME GOODS-N FIELD = NAME GOODS NORTHERN FIELD ----------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 64 105 Photometry of the LBG Sample (Category 1, 2, and 3) table2.dat 74 105 The best-fit parameters
See also: II/261 : GOODS initial results (Giavalisco+, 2004) J/ApJ/519/1 : Lyman-break galaxies at z ≳ 4 (Steidel+, 1999) J/AJ/127/3121 : TKRS catalog of GOODS-North Field (Wirth+, 2004) J/ApJ/653/1027 : TKRS/GOODS-N Field galaxies (Weiner+, 2006) J/ApJ/660/81 : BViz photometry of TKRS blue galaxies in GOODS-N (Melbourne+, 2007) J/MNRAS/380/986 : Lyman-break galaxies from GALEX (Burgarella+, 2007) J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008) J/MNRAS/401/1521 : Stellar masses of Lyman break galaxies at z∼3 (Magdis+, 2010) J/ApJS/187/251 : Ultradeep Ks imaging in the GOODS-N (Wang+, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- [IOT2007] Object identification 8 A1 --- l_Vmag Limit flag on Vmag (1) 9- 13 F5.2 mag Vmag Subaru V-band magnitude 15- 18 F4.2 mag e_Vmag ? Vmag 1σ error 20- 24 F5.2 mag Icmag Subaru Ic-band magnitude 26- 29 F4.2 mag e_Icmag Icmag 1σ error 31- 35 F5.2 mag z'mag Subaru z'-band magnitude 37- 40 F4.2 mag e_z'mag z'mag 1σ error 42 A1 --- l_3.6mag Limit flag on 3.6mag (2) 43- 47 F5.2 mag 3.6mag Spitzer/IRAC 3.6 um band magnitude 49- 52 F4.2 mag e_3.6mag ? 3.6mag 1σ error 54 A1 --- l_4.5mag Limit flag on 4.5mag (2) 55- 59 F5.2 mag 4.5mag ?=9.99 Spitzer/IRAC 4.5 um band magnitude 61- 64 F4.2 mag e_4.5mag ? 4.5mag 1σ error
Note (1): Upper limits are 3σ values in 1.6" diameter aperture. Note (2): Upper limits are 3σ values in 2.4" diameter aperture.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- [IOT2007] Object designation 8- 12 F5.2 [Msun] M* Stellar mass (log scale) 14- 17 F4.2 [Msun] E_M* Positive error on M* (1) 19- 22 F4.2 [Msun] e_M* Negative error on M* (1) 24- 28 F5.2 [yr] Age Stellar age (log scale) 30- 33 F4.2 [yr] E_Age Positive error on Age (1) 35- 38 F4.2 [yr] e_Age Negative error on Age (1) 40- 43 F4.2 mag E(B-V) B-V color excess 45- 48 F4.2 mag E_E(B-V) Positive error on E(B-V) (1) 50- 53 F4.2 mag e_E(B-V) Negative error on E(B-V) (1) 55- 58 F4.2 [Msun/yr] SFR Star Formation Rate (log scale) 60- 63 F4.2 [Msun/yr] E_SFR Positive error on SFR (1) 65- 68 F4.2 [Msun/yr] e_SFR Negative error on SFR (1) 70- 74 F5.2 --- chi2 chi2 best fit (1)
Note (1): Errors are 90% confidence and determined as follows: Monte Carlo realizations are computed for each object, and from the χ2 distribution of these realizations we determined the Δχ2 which encloses 90% of the realizations. With this Δχ2, we define the 90% error contour for each object. Projections of the error contours onto the relevant parameter axes give the 90% errors on the individual parameters.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 09-Mar-2011
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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