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J/ApJ/706/158          Early-type galaxies in PEARS            (Ferreras+, 2009)

Early-type galaxies in the PEARS survey: probing the stellar populations at moderate redshift. Ferreras I., Pasquali A., Malhotra S., Rhoads J., Cohen S., Windhorst R., Pirzkal N., Grogin N., Koekemoer A.M., Lisker T., Panagia N., Daddi E., Hathi N.P. <Astrophys. J., 706, 158-169 (2009)> =2009ApJ...706..158F
ADC_Keywords: Galaxies, photometry ; Morphology ; Photometry, HST ; Redshifts Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: stellar content Abstract: Using Hubble Space Telescope (HST)/Advanced Camera for Surveys (ACS) slitless grism spectra from the PEARS program, we study the stellar populations of morphologically selected early-type galaxies in the GOODS North and South fields. The sample - extracted from a visual classification of the (v2.0) HST/ACS images and restricted to redshifts z>0.4 - comprises 228 galaxies (iF775W<24mag, AB) out to z≲1.3 over 320arcmin2, with a median redshift zM=0.75. This work significantly increases our previous sample from the GRAPES survey in the HUDF (18 galaxies over ∼11arcmin2). The grism data allow us to separate the sample into "red" and "blue" spectra, with the latter comprising 15% of the total. Three different grids of models parameterizing the star formation history are used to fit the low-resolution spectra. Description: In this paper, we extend the analysis of Pasquali et al. (2006ApJ...636..115P) to a sample of early-type galaxies that is a factor of 11 larger than in the HUDF. The objects (228 in total) are extracted from the sample of morphologically selected early-type galaxies of Ferreras et al. (2009MNRAS.395..554F) in the GOODS North and South fields and have been observed as part of PEARS. Throughout this paper, a standard ΛCDM cosmology from the WMAP five-year data is used to determine ages and rest-frame properties (Komatsu et al. 2009ApJS..180..330K). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 54 228 Catalog of PEARS early-type galaxies: observed data table3.dat 72 228 Catalog of PEARS early-type galaxies: physical properties in chemical enrichment (CSP) model
See also: J/ApJ/695/1591 : Spectrophotometry in PEARS fields (Pirzkal+, 2009) J/AJ/135/1624 : PEARS emission-line galaxies (Straughn+, 2008) J/ApJ/666/863 : GOODS MIPS early-type galaxies (Van Der Wel+, 2007) J/ApJ/650/148 : GOODS blue early-type galaxies (Lee+, 2006) J/ApJ/635/243 : Sample of GOODS/CDFS early-type galaxies (Ferreras+, 2005) J/AJ/129/2138 : Centers of early-type galaxies with HST (Lauer+, 2005) J/AJ/127/131 : NICMOS early-type galaxies (Stanford+, 2004) http://archive.stsci.edu/prepds/pears/ : PEARS (Probing Evolution And Reionization Spectroscopically) home page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- PEARS PEARS (Probing Evolution And Reionization Spectroscopically) identification number 9- 19 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000) 22- 31 F10.6 deg DEdeg Declination in decimal degrees (J2000) 34- 38 F5.2 mag imag The HST/ACS i-band (F775W) AB magnitude 41- 45 F5.2 pix Re Half-light radius (1pixel=0.3arcsec) 48- 51 F4.2 --- z Redshift 54 I1 --- B/R [0/1] Red (0) or Blue (1) SED (1)
Note (1): Blue/Red SED types are based on the visual inspection of the PEARS slitless grism data.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- PEARS PEARS (Probing Evolution And Reionization Spectroscopically) identification number 9- 13 F5.2 10+10Msun M* Stellar mass 16- 20 F5.2 mag U-V Rest-frame (U-V) color (Vega scale) 23- 28 F6.2 mag VMag Rest-frame absolute V-band (Vega scale) 31- 35 F5.2 kpc ReP Projected half-light radius 38- 41 F4.2 Gyr <t> Average age 44- 47 F4.2 Gyr sig(t) RMS of age distribution 50- 54 F5.2 [Sun] <logZ> Average logarithmic metallicity (relative to Sun) 57- 60 F4.2 --- beta [0/1] Outflow fraction (mass fraction of gas ejected as a result of the ongoing star formation) 63- 65 F3.1 --- zF Formation epoch, given by the redshift at which infall starts 68- 72 F5.2 [Gyr] logTf Log of infall timescale
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 09-Dec-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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