2010A&A...518L..25R


Query : 2010A&A...518L..25R

2010A&A...518L..25R - Astronomy and Astrophysics, volume 518, L25-25 (2010/7-2)

The first Herschel view of the mass-SFR link in high-z galaxies.

RODIGHIERO G., CIMATTI A., GRUPPIONI C., POPESSO P., ANDREANI P., ALTIERI B., AUSSEL H., BERTA S., BONGIOVANNI A., BRISBIN D., CAVA A., CEPA J., DADDI E., DOMINGUEZ-SANCHEZ H., ELBAZ D., FONTANA A., FOERSTER-SCHREIBER N., FRANCESCHINI A., GENZEL R., GRAZIAN A., LUTZ D., MAGDIS G., MAGLIOCCHETTI M., MAGNELLI B., MAIOLINO R., MANCINI C., NORDON R., PEREZ GARCIA A.M., POGLITSCH A., SANTINI P., SANCHEZ-PORTAL M., POZZI F., RIGUCCINI L., SAINTONGE A., SHAO L., STURM E., TACCONI L., VALTCHANOV I., WETZSTEIN M. and WIEPRECHT E.

Abstract (from CDS):

We exploit deep observations of the GOODS-N field taken with PACS, the Photodetector Array Camera and Spectrometer, onboard of Herschel, as part of the PACS evolutionary probe guaranteed time (PEP), to study the link between star formation and stellar mass in galaxies to z∼2. Starting from a stellar mass - selected sample of ∼4500 galaxies with mag4.5µm<23.0 (AB), we identify ∼350 objects with a PACS detection at 100 or 160µm and ∼1500 with only Spitzer 24µm counterpart. Stellar masses and total IR luminosities (LIR) are estimated by fitting the spectral energy distributions (SEDs). Consistently with other Herschel results, we find that LIR based only on 24 µm data is overestimated by a median factor ∼1.8 at z∼2, whereas it is underestimated (with our approach) up to a factor ∼1.6 at 0.5<z<1.0. We then exploit this calibration to correct LIR based on the MIPS/Spitzer fluxes. These results clearly show how Herschel is fundamental to constrain LIR, and hence the star formation rate (SFR), of high redshift galaxies. Using the galaxies detected with PACS (and/or MIPS), we investigate the existence and evolution of the relations between the SFR, the specific star formation rate (SSFR=SFR/mass) and the stellar mass. Moreover, in order to avoid selection effects, we also repeat this study through a stacking analysis on the PACS images to fully exploit the far-IR information also for the Herschel and Spitzer undetected subsamples. We find that the SSFR-mass relation steepens with redshift, being almost flat at z<1.0 and reaching a slope of α=-0.50+0.13–0.16 at z∼2, at odds with recent works based on radio-stacking analysis at the same redshift. The mean SSFR of galaxies increases with redshift, by a factor ∼15 for massive M>1011M galaxies from z=0 to z=2, and seems to flatten at z>1.5 in this mass range. Moreover, the most massive galaxies have the lowest SSFR at any z, implying that they have formed their stars earlier and more rapidly than their low mass counterparts (downsizing).

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: active - galaxies: starburst - cosmology: observations - infrared: galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 1050 1

Query : 2010A&A...518L..25R

Basic data :
NAME GOODS-N Field -- Region defined in the Sky
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
reg ()
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
12 36 55.0 +62 14 15 [ ] D 2011ApJ...732..126M
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
12 34 41.1 +62 30 45 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
125.8654 +54.8080 [ ]
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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Some important notes on this object about identifications and objects associations.
notes:

  • 10'x16', centered on the Hubble Deep Field North


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (4) :
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NAME GOODS-N Field NAME GOODS North Field NAME GOODS Northern Field NAME GOODS-North Field

References (1050 between 1850 and 2022) (Total 1050)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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2022.09.26-14:59:20

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