J/A+A/504/751 GOODS-MUSIC catalog updated version (Santini+, 2009)
Star formation and mass assembly in high redshift galaxies.
Santini P., Fontana A., Grazian A., Salimbeni S., Fiore F., Fontanot F.,
Boutsia K., Castelllano M., Cristiani S.,De Santis C., Gallozzi S.,
Giallongo E., Nonino M., Menci N., Paris D., Pentericci L., Vanzella E.
<Astron. Astrophys. 504, 751 (2009)>
=2009A&A...504..751S 2009A&A...504..751S
ADC_Keywords: Galaxies, photometry ; Galaxy catalogs ; Redshifts
Keywords: galaxies: evolution - galaxies: high-redshift -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: starburst
Abstract:
The goal of this work is to infer the star formation properties and
the mass assembly process of high redshift (0.3≤z<2.5) galaxies from
their IR emission using the 24 micron band of MIPS-Spitzer. We used an
updated version of the GOODS-MUSIC catalog, which has multiwavelength
coverage from 0.3 to 24 micron and either spectroscopic or accurate
photometric redshifts.
We describe how the catalog has been extended by the addition of
mid-IR fluxes derived from the MIPS 24 micron image. We compared two
different estimators of the star formation rate (SFR hereafter). One
is the total infrared emission derived from 24 micron, estimated using
both synthetic and empirical IR templates. The other one is a
multiwavelength fit to the full galaxy SED, which automatically
accounts for dust reddening and age-star formation activity
degeneracies. For both estimates, we computed the SFR density and the
specific SFR.
We show that the two SFR indicators are roughly consistent, once the
uncertainties involved are taken into account. However, they show a
systematic trend, IR-based estimates exceeding the fit-based ones as
the star formation rate increases. With this new catalog, we show
that: a) at z>0.3, the star formation rate is correlated well with
stellar mass, and this relationship seems to steepen with redshift if
one relies on IR-based estimates of the SFR; b) the contribution to
the global SFRD by massive galaxies increases with redshift up to
∼2.5, more rapidly than for galaxies of lower mass, but appears to
flatten at higher z; c) despite this increase, the most important
contributors to the SFRD at any z are galaxies of about, or
immediately lower than, the characteristic stellar mass; d) at z∼2,
massive galaxies are actively star-forming, with a median SFR ∼
300M☉/yr. During this epoch, our targeted galaxies assemble a
substantial part of their final stellar mass; e) the specific SFR
(SSFR) shows a clear bimodal distribution.
The analysis of the SFR density and the SSFR seems to support the
downsizing scenario, according to which high mass galaxies have formed
their stars earlier and more rapidly than their low mass counterparts.
A comparison with renditions of theoretical simulations of galaxy
formation and evolution indicates that these models follow the global
increase in the SSFR with redshift and predict the existence of
quiescent galaxies even at z>1.5. However, the average SSFR is
systematically underpredicted by all models considered.
Description:
The GOODS-MUSIC multiwavelength catalog provides photometric and
spectroscopic information for galaxies in the GOODS Southern field. It
includes two U images obtained with the ESO 2.2m telescope and one U
band image from VLT-VIMOS, the ACS-HST images in four optical
(B,V,i,z) bands, the VLT-ISAAC J, H, and Ks bands as well as the
Spitzer images at 3.6, 4.5, 5.8, and 8 micron (IRAC) and 24 micron
(MIPS). Most of these images have been made publicly available in the
coadded version by the GOODS team, while the U band data were
retrieved in raw format and reduced by our team. We also collected all
the available spectroscopic information from public spectroscopic
surveys and cross-correlated the spectroscopic redshifts with our
photometric catalog. For the unobserved fraction of the objects, we
applied our photometric redshift code to obtain well-calibrated
photometric redshifts. The final catalog is made up of 15208 objects,
with 209 known stars and 61 AGNs. The major new feature of this
updated release is the inclusion of 24 micron photometry. Further
improvements concern a revised photometry in the four IRAC bands
(mainly based on the use of new PSF-matching kernerls and on a revised
procedure for estimating the background), the enlargement of the
sample of galaxies with spectroscopic redshifts, the addition of
objects selected on the IRAC 4.5 micron image and a more careful
selection of AGN sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 412 18657 Multiwavelength catalog (photometry,
spectroscopy and magnitude limits)
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See also:
J/A+A/434/53 : GOODS-South Field redshifts (Vanzella+, 2005)
J/A+A/454/423 : GOODS-South Field VLT/FORS2 redshifts. II. (Vanzella+, 2006)
J/A+A/478/83 : GOODS-South Field VLT/FORS2 redshifts. III. (Vanzella+, 2008)
J/A+A/449/951 : GOODS-MUSIC sample: multicolour catalog (Grazian+, 2006)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Identification number
(GOODS-MUSIC NNNNN in Simbad)
7- 16 F10.7 deg RAdeg Right ascension (J2000)
18- 28 F11.7 deg DEdeg Declination (J2000)
30 A1 --- l_U35 [-] Limit flag on U35 magitude (upper limit)
31- 38 F8.5 mag U35 ?=99.00000 U35 magnitude (1)
40 A1 --- l_U38 [-] Limit flag on U38 magnitude (upper limit)
41- 48 F8.5 mag U38 ?=99.00000 U38 magnitude (1)
50 A1 --- l_Uvimos [-] Limit flag on Uvimos (upper limit)
51- 58 F8.5 mag Uvimos ?=99.00000 U-VIMOS magnitude (1)
60 A1 --- l_Bmag [-] Limit flag on Bmag (upper limit)
61- 68 F8.5 mag Bmag ?=99.00000 B magnitude (1)
70 A1 --- l_Vmag [-] Limit flag on Vmag (upper limit)
71- 78 F8.5 mag Vmag ?=99.00000 V magnitude (1)
80 A1 --- l_Imag [-] Limit flag on Imag (upper limit)
81- 88 F8.5 mag Imag ?=99.00000 I magnitude (1)
90 A1 --- l_Zmag [-] Limit flag on Zmag (upper limit)
91- 98 F8.5 mag Zmag ?=99.00000 Z magnitude (1)
100 A1 --- l_Jmag [-] Limit flag on Jmag (upper limit)
101-108 F8.5 mag Jmag ?=99.00000 J magnitude (1)
110 A1 --- l_Hmag [-] Limit flag on Hmag (upper limit)
111-118 F8.5 mag Hmag ?=99.00000 H magnitude (1)
120 A1 --- l_Ksmag [-] Limit flag on Ksmag (upper limit)
121-128 F8.5 mag Ksmag ?=99.00000 Ks magnitude (1)
130 A1 --- l_3.6mag [-] Limit flag on 3.6mag (upper limit)
131-138 F8.5 mag 3.6mag ?=99.00000 IRAC 3.6 micron magnitude (1)
140 A1 --- l_4.5mag [-] Limit flag on 4.5mag (upper limit)
141-148 F8.5 mag 4.5mag ?=99.00000 IRAC 4.5 micron magnitude (1)
150 A1 --- l_5.8mag [-] Limit flag on 5.8mag (upper limit)
151-158 F8.5 mag 5.8mag ?=99.00000 IRAC 5.8 micron magnitude (1)
160 A1 --- l_8.0mag [-] Limit flag on 8.0mag (upper limit)
161-168 F8.5 mag 8.0mag ?=99.00000 IRAC 8.0 micron magnitude (1)
170 A1 --- l_24mag [-] Limit flag on 24mag (upper limit)
171-178 F8.5 mag 24mag ?=99.00000 MIPS 24 micron magnitude (1)
180-187 F8.5 mag e_U35 ?=99.00000 U35 magnitude error
189-196 F8.5 mag e_U38 ?=99.00000 U38 magnitude error
198-205 F8.5 mag e_Uvimos ?=99.00000 U-VIMOS magnitude error
207-214 F8.5 mag e_Bmag ?=99.00000 B magnitude error
216-223 F8.5 mag e_Vmag ?=99.00000 V magnitude error
225-232 F8.5 mag e_Imag ?=99.00000 I magnitude error
234-241 F8.5 mag e_Zmag ?=99.00000 Z magnitude error
243-250 F8.5 mag e_Jmag ?=99.00000 J magnitude error
252-259 F8.5 mag e_Hmag ?=99.00000 H magnitude error
261-268 F8.5 mag e_Ksmag ?=99.00000 Ks magnitude error
270-277 F8.5 mag e_3.6mag ?=99.00000 IRAC 3.6 micron magnitude error
279-286 F8.5 mag e_4.5mag ?=99.00000 IRAC 4.5 micron magnitude error
288-295 F8.5 mag e_5.8mag ?=99.00000 IRAC 5.8 micron magnitude error
297-304 F8.5 mag e_8.0mag ?=99.00000 IRAC 8.0 micron magnitude error
306-313 F8.5 mag e_24mag ?=99.00000 MIPS 24 micron magnitude error
316-324 F9.6 --- zsp ?=-1.000000 Spectroscopic redshift (1)
326-334 A9 --- Class Spectroscopic class (2)
336-343 A8 --- r_Class Spectroscopic Catalog (3)
345-346 I2 --- q_zsp ?=99 Quality of spectroscopic redshift (4)
348-356 F9.6 --- zphot ?=-1.000000 Photometric redshift
358-366 F9.6 --- zbest ?=-1.000000 Redshift (5)
368-374 F7.4 mag Zlim ?=0.0000 Z band magnitude limit (6)
376-382 F7.4 mag Kslim Ks band magnitude limit (7)
384-388 F5.3 --- S/G [0/1] Star-galaxy classifier (8)
390-392 I3 --- blKs ?=-99 Number of contaminants in Ks band
394-396 I3 --- bl3.6 ?=* Number of contaminants in IRAC 3.6um band
398 I1 --- f24 [0/2] 24 micron photometry flag (9)
400 I1 --- pos [0/1] Position flag (10)
402 I1 --- st [0/1] Star flag (11)
404 I1 --- AGN [0/1] AGN flag (12)
406 I1 --- Gal [0/1] galaxy flag (13)
408 I1 --- C.z [0/1] 90% complete sample in z band
410 I1 --- C.Ks [0/1] 90% complete sample in Ks band
412 I1 --- C4.5 [0/1] 90% complete sample in IRAC 4.5um band
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Note (1): Magnitudes are in the AB photometric system.
The filter characteristics are:
-----------------------------
Filter lam.c Dlam
name (microns)
-----------------------------
U35 0.3590 0.0222
U38 0.3680 0.0170
Uvimos 0.3780 0.0197
B (F435W) 0.4330 0.0508
V (F606W) 0.5940 0.1168
i (F775W) 0.7710 0.0710
z (F850LP) 0.8860 0.0554
J (ISAAC) 1.2550 0.1499
H (ISAAC) 1.6560 0.1479
Ks(ISAAC) 2.1630 0.1383
3.6mag 3.5620 0.3797
4.5mag 4.5120 0.5043
5.8mag 5.6860 0.6846
8.0mag 7.9360 1.4797
-----------------------------
Note (2): Spectroscopic classification consists of:
EARLY = early type galaxy
EMISSION = late type galaxy
COMPOSITE = early+late type galaxy
AGN = Active Galactic Nucleus
STAR = Star
GALAXY = Galaxy
SNa = Type Ia supernova
UNKNOWN = spectrum not available
Note (3): Reference spectroscopic catalog is as follows:
GOODS = Vanzella et al., 2005, Cat. J/A+A/434/53,
Vanzella et al., 2006, Cat. J/A+A/454/423,
Vanzella et al., 2008, Cat. J/A+A/478/83
K20 = Mignoli et al., 2005, Cat. J/A+A/437/883
CXO-CDFS = Szokoly et al., 2004, Cat. J/ApJS/155/271
VVDS = Le Fevre et al., 2004, Cat. J/A+A/428/1043
MASTER = http://www.eso.org/science/goods/spectroscopy/CDFS_Mastercat/
LCIRS = Doherty et al., 2005, Cat. J/MNRAS/361/525
COMBO-17 = Wolf et al., 2004A&A...421..913W 2004A&A...421..913W, Cat. II/253
DADDI = Daddi et al., 2005ApJ...626..680D 2005ApJ...626..680D
SIC = Cristiani et al., 2000A&A...359..489C 2000A&A...359..489C
astro-ph = Strolger et al., 2004, Cat. J/ApJ/613/200S,
van der Wel et al., 2005ApJ...631..145V 2005ApJ...631..145V;
Roche et al., 2006MNRAS.370...74R 2006MNRAS.370...74R;
Ravikumar et al., 2007, Cat. J/A+A/465/1099,
Teplitz et al., 2007ApJ...659..941T 2007ApJ...659..941T;
Xu et al., 2007AJ....134..169X 2007AJ....134..169X;
Gronwall et al., 2007ApJ...667...79G 2007ApJ...667...79G;
Nilsson et al., 2007A&A...471...71N 2007A&A...471...71N;
Hathi et al., 2008ApJ...673..686H 2008ApJ...673..686H;
Finkelstein et al., 2008ApJ...678..655F 2008ApJ...678..655F;
Yang et al., 2008ASPC..390..502Y 2008ASPC..390..502Y
VIMOS = Popesso et al., 2009A&A...494..443P 2009A&A...494..443P
UNKNOWN = spectrum not available
Note (4): Quality of spectroscopic redshift:
0 =very good
1 = good
2 = uncertain
3 = bad quality
99 = not available
Note (5): redshift=spectroscopic redshift if gal=1 (13) and q_zsp<2 (4),
redshift=photometric redshift if gal=1 and q_zsp≥2,
redshift=-1.0 if gal=0.
Note (6): Magnitude limit in the z band in 1 sq. arcsec. and at S/N=1.
Note (7): Magnitude limit in the Ks band in 1 sq. arcsec. and at S/N=1.
Note (8): Star/Galaxy index of SExtractor.
Note (9): 24 micron photometry flag:
0 = OK,
1 = uncertain,
2 = problem
Note (10): Position flag:
1 = inside GOODS-MUSIC area,
0 = outside
Note (11): Star flag (on the basis of spectroscopy, morphology,
and BzK colours):
1 = probable star
0 = no star or outside area
Note (12): AGN flag (based on spectroscopy, X-ray emission and morphology):
1 = probable AGN
0 = no AGN or outside area
Note (13): Galaxy flag:
0 = not galaxy
1 = galaxy (when position flag=1 and star flag=0 and AGN flag=0)
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Acknowledgements:
P. Santini, santini(at)oa-roma.inaf.it
(End) P. Santini [INAF, Osser. Astron. di Roma], P. Vannier [CDS] 26-Jun-2009