J/ApJ/759/139 Herschel + MIPS photometry of GOODS sources (Kirkpatrick+, 2012)
GOODS-Herschel: impact of active galactic nuclei and star formation activity on
infrared spectral energy distributions at high redshift.
Kirkpatrick A., Pope A., Alexander D.M., Charmandaris V., Daddi E.,
Dickinson M., Elbaz D., Gabor J., Hwang H.S., Ivison R., Mullaney J.,
Pannella M., Scott D., Altieri B., Aussel H., Bournaud F., Buat V.,
Coia D., Dannerbauer H., Dasyra K., Kartaltepe J., Leiton R., Lin L.,
Magdis G., Magnelli B., Morrison G., Popesso P., Valtchanov I.
<Astrophys. J., 759, 139 (2012)>
=2012ApJ...759..139K 2012ApJ...759..139K
ADC_Keywords: Photometry, millimetric/submm ; Galaxies, IR ; Redshifts ;
Active gal. nuclei ; Surveys
Keywords: dust, extinction; galaxies: active; galaxies: evolution;
galaxies: star formation; infrared: galaxies
Abstract:
We explore the effects of active galactic nuclei (AGNs) and star
formation activity on the infrared (0.3-1000µm) spectral energy
distributions (SEDs) of luminous infrared galaxies from z=0.5 to 4.0.
We have compiled a large sample of 151 galaxies selected at 24µm
(S24≳100µJy) in the GOODS-N and ECDFS fields for which we have
deep Spitzer IRS spectroscopy, allowing us to decompose the mid-IR
spectrum into contributions from star formation and AGN activity. A
significant portion (∼25%) of our sample is dominated by an AGN (>50%
of the mid-IR luminosity) in the mid-IR. Based on the mid-IR
classification, we divide our full sample into four sub-samples: z∼1
star-forming (SF) sources, z∼2 SF sources, AGNs with clear 9.7µm
silicate absorption, and AGNs with featureless mid-IR spectra. From
our large spectroscopic sample and wealth of multi-wavelength data,
including deep Herschel imaging at 100, 160, 250, 350, and 500µm,
we use 95 galaxies with complete spectral coverage to create a
composite SED for each sub-sample. We then fit a two-temperature
component modified blackbody to the SEDs. We find that the IR SEDs
have similar cold dust temperatures, regardless of the mid-IR power
source, but display a marked difference in the warmer dust
temperatures. We calculate the average effective temperature of the
dust in each sub-sample and find a significant (∼20K) difference
between the SF and AGN systems. We compare our composite SEDs to local
templates and find that local templates do not accurately reproduce
the mid-IR features and dust temperatures of our high-redshift
systems. High-redshift IR luminous galaxies contain significantly more
cool dust than their local counterparts. We find that a full suite of
photometry spanning the IR peak is necessary to accurately account for
the dominant dust temperature components in high-redshift IR luminous
galaxies.
Description:
Our sample consists of 151 high-redshift galaxies from the Great
Observatories Origins Deep Survey North (GOODS-N) and Extended Chandra
Deep Field Survey (ECDFS) fields. We include all sources in these
fields that were observed with the Spitzer Infrared Spectrograph
(IRS).
The GOODS fields have been extensively surveyed and are rich in deep
multi-wavelength data, including Chandra 2Ms X-ray observations, 3.6,
4.5, 5.8, and 8.0um imaging from the Infrared Array Camera (IRAC) on
Spitzer, IRS peak-up observations at 16um, and MIPS imaging at 24 and
70um (Magnelli et al. 2011A&A...528A..35M 2011A&A...528A..35M). Recently, GOODS-N and
GOODS-S have been surveyed with the GOODS-Herschel Open Time Key
Program (P.I. David Elbaz; Elbaz et al. 2011, Cat. J/A+A/533/A119)
using both the PACS and SPIRE instruments, providing deep photometry
at five far-IR and submillimeter wavelengths: 100, 160, 250, 350, and
500um.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 134 151 Spitzer/MIPS and Herschel photometry
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See also:
VI/139 : Herschel Observation Log (Herschel Science Centre, 2013)
II/261 : GOODS initial results (Giavalisco+, 2004)
J/ApJ/769/116 : Dust-obscured galaxies in the local universe (Hwang+, 2013)
J/A+A/551/A100 : Panchromatic SED of Herschel sources (Berta+, 2013)
J/A+A/545/A141 : UV selected sources in the GOODS-S field (Buat+, 2012)
J/MNRAS/417/2239 : SPIRE (f250um>17.4mJy) GOODS-N galaxies (Symeonidis+, 2011)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
J/AJ/141/1 : Spitzer observations of GOODS fields (Teplitz+, 2011)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/A+A/528/A35 : Infrared luminosity in GOODS fields (Magnelli+, 2011)
J/ApJ/741/32 : Spatial extent of (U)LIRG in the MIR. II. (Diaz-Santos+, 2011)
J/A+A/511/A50 : JHks of GOODS-South field (Retzlaff+, 2010)
J/ApJ/720/368 : Color-magnitude relations of galaxies in CDFs (Xue+, 2010)
J/ApJ/714/1305 : The Deep SWIRE Field (DSF) IV. (Strazzullo+, 2010)
J/ApJS/189/270 : MUSYC optical imaging in ECDF-S (Cardamone+, 2010)
J/ApJS/187/251 : Ultradeep Ks imaging in the GOODS-N (Wang+, 2010)
J/A+A/504/751 : GOODS-MUSIC catalog updated version (Santini+, 2009)
J/ApJ/707/1201 : LABOCA ECDFS Submillimeter Survey (LESS) (Weiss+, 2009)
J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008)
J/ApJ/666/863 : GOODS MIPS early-type galaxies (Van Der Wel+, 2007)
J/ApJ/640/603 : Catalog of AGNs in the GOODS fields (Treister+, 2006)
J/MNRAS/371/1891 : GOODS ELAIS-N1 24um flux densities (Rodighiero+, 2006)
J/AJ/127/180 : The Hawaii Hubble Deep Field North (Capak+, 2004)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID IRS galaxy identification
(<[KPA2012] G{N|S}-IRSNN> in Simbad)
10 A1 --- f_ID [def] Rejected source (1)
12- 13 I2 h RAh Hour of right ascension (J2000)
15- 16 I2 min RAm Minute of right ascension (J2000)
18- 22 F5.2 s RAs Second of right ascension (J2000)
24 A1 --- DE- Sign of declination (J2000)
25- 26 I2 deg DEd Degree of declination (J2000)
28- 29 I2 arcmin DEm Arcminute of declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of declination (J2000)
36- 43 A8 --- Set Sub-sample (5)
45- 47 I3 % Fagn [0/100] Strength of the AGN in the mid-IR (2)
49- 52 F4.2 --- z [0.3/4.1] Redshift from IRS spectrum
54- 59 F6.1 uJy S24 [65.5/3560]? Spitzer/MIPS 24um flux
61- 64 F4.1 uJy e_S24 [4/36]? S24 uncertainty
66- 70 F5.2 mJy S70 [1.2/16.3]? Spitzer/MIPS 70um flux
72- 75 F4.2 mJy e_S70 [0.5/1]? S70 uncertainty
77- 81 F5.2 mJy S100 [0.5/34.2]? Herschel/PACS 100um flux
83- 86 F4.2 mJy e_S100 [0.1/3]? S100 uncertainty
88- 92 F5.2 mJy S160 [1.7/63.7]? Herschel/PACS 160um flux
94- 97 F4.2 mJy e_S160 [0.4/6]? S160 uncertainty
99-103 F5.2 mJy S250 [0.5/73.3]? Herschel/SPIRE 250um flux (3)
105-108 F4.2 mJy e_S250 [0.9/5]? S250 uncertainty (3)
109 A1 --- f_S250 [m] Additional S250 measurement (4)
111-115 F5.2 mJy S350 [3.4/49.4]? Herschel/SPIRE 350um flux (3)
117-120 F4.2 mJy e_S350 [0.8/10]? S350 uncertainty (3)
121 A1 --- f_S350 [m] Additional S350 measurement (4)
123-127 F5.2 mJy S500 [0.4/33]? Herschel/SPIRE 500um flux (3)
129-133 F5.2 mJy e_S500 [1.8/13]? S500 uncertainty (3)
134 A1 --- f_S500 [m] Additional S500 measurement (4)
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Note (1): Flag as follows:
d = These sources were rejected from the creation of the composites due to
blending in the far-IR (see Section 3).
e = Sources rejected from the creation of the composites because they lack
data in the wavelength range used to normalize the mid-IR spectra (see
Section 3).
f = Sources rejected from the creation of the composites due to having a
noisy spectrum (see Section 3).
Note (2): When we perform spectral decomposition on each IRS spectrum,
we calculate the percentage of mid-IR luminosity due to a power-law
component (see Section 2.3). We attribute the power-law component to
an AGN, so this percentage represents the strength of the AGN in the
mid-IR luminosity.
Note (3): Entries that are blank indicate that the source was too blended
in SPIRE to extract a flux measurement; this mostly affects 500um. We
list only the instrument noise for each detection or measurement, but
we add in the confusion noise when performing the far-IR SED fitting.
Note (4): For sources that do not have measurements at SPIRE wavelengths
from the GOODS-Herschel prior catalog, we make a measurement from the
SPIRE images directly even if it is not a formal detection so it can
be included in the SED fitting (see Section 3). These additional
measurements are identified by the "m" flag.
Note (5): the 4 sub-samples are:
z ∼ 1 SF = star-forming galaxies at redshift around 1 (Teff=37±3K)
z ∼ 2 SF = star-forming galaxies at redshift around 2 (Teff=40±3K)
Sil AGN = Silicate AGN (Teff=58±2K)
Feat AGN = Featureless AGN (Teff=65±2K)
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 16-Jul-2014