Extragalactic Results from the Infrared Space Observatory

Genzel, R.; Césarsky, C. J.

doi:10.1146/annurev.astro.38.1.761

Cited by 274 publications

(290 citation statements)

References 267 publications

(358 reference statements)

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“…For example, early attempts to reconstruct the cosmic star formation history suffered from uncertainties in the obscuration corrections that have to be applied to the rest frame ultraviolet measurements (e.g., Madau 1996;Lilly et al 1996). Soon, the importance of luminous dusty high-redshift galaxies was highlighted by the detection of infrared-luminous populations both in the mid-infrared (e.g., Aussel et al 1999;Genzel & Cesarsky 2000) and the submm (e.g., Hughes et al 1998). Mainly thanks to the large mid-infrared legacy that the Spitzer mission provided for extragalactic studies (Soifer et al 2008), a global consistency between these two perspectives from the rest frame ultraviolet and from the rest frame mid-IR side could be achieved (e.g., Hopkins & Beacom 2006).…”

Section: Motivationmentioning

confidence: 99%

PACS Evolutionary Probe (PEP) – AHerschelkey program

Lutz

Poglitsch

Altiéri

et al. 2011

A&A

501

500

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Deep far-infrared photometric surveys studying galaxy evolution and the nature of the cosmic infrared background are a key strength of the Herschel mission. We describe the scientific motivation for the PACS Evolutionary Probe (PEP) guaranteed time key program and its role within the entire set of Herschel surveys, and the field selection that includes popular multiwavelength fields such as GOODS, COSMOS, Lockman Hole, ECDFS, and EGS. We provide an account of the observing strategies and data reduction methods used. An overview of first science results illustrates the potential of PEP in providing calorimetric star formation rates for high-redshift galaxy populations, thus testing and superseding previous extrapolations from other wavelengths, and enabling a wide range of galaxy evolution studies.

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Section: Motivationmentioning

confidence: 99%

PACS Evolutionary Probe (PEP) – AHerschelkey program

Lutz

Poglitsch

Altiéri

et al. 2011

A&A

501

500

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“…From those studies (see Genzel & Cesarsky 2000, for a review), the [C ] line emerges as the brightest cooling line of the ISM in star-forming galaxies and as a good tracer of the star formation activity, accounting for ∼0.1-1% of the FIR luminosity (e.g., Stacey et al 2010;Pierini et al 2003;Boselli et al 2002;De Looze et al 2011, 2014aSargsyan et al 2014). A deficit in the FIR line intensities is, however, found in luminous IR galaxies (e.g., Luhman et al 2003;Graciá-Carpio et al 2011;Croxall et al 2012;Díaz-Santos et al 2013).…”

Section: Introductionmentioning

confidence: 99%

TheHerschelDwarf Galaxy Survey

Cormier

Madden

Lebouteiller

et al. 2015

A&A

244

399

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Context. The far-infrared (FIR) lines are important tracers of the cooling and physical conditions of the interstellar medium (ISM) and are rapidly becoming workhorse diagnostics for galaxies throughout the universe. There are clear indications of a different behavior of these lines at low metallicity that needs to be explored. Aims. Our goal is to explain the main differences and trends observed in the FIR line emission of dwarf galaxies compared to more metal-rich galaxies, and how this translates in ISM properties. ] 57 µm fine-structure cooling lines in a sample of 48 low-metallicity star-forming galaxies of the guaranteed time key program Dwarf Galaxy Survey. We correlate PACS line ratios and line-to-L TIR ratios with L TIR , L TIR /L B , metallicity, and FIR color, and interpret the observed trends in terms of ISM conditions and phase filling factors with Cloudy radiative transfer models. Results. We find that the FIR lines together account for up to 3 percent of L TIR and that star-forming regions dominate the overall emission in dwarf galaxies. Compared to metal-rich galaxies, the ratios of Harboring compact phases of a low filling factor and a large volume filling factor of diffuse gas, the ISM of low-metallicity dwarf galaxies has a more porous structure than that of metal-rich galaxies. Methods

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“…Deep cosmological surveys carried out with the ISO (see Genzel & Cesarsky 2000, for a summary) and Spitzer Space Observatory (Soifer et al 2008, for a review) produced large samples of mid-IR sources and deep number counts (Elbaz et al 2002;Papovich et al 2004). These surveys led to mid-IR CIB lower limits within a factor of two from the upper constraints set by TeV cosmic opacity measurements (e.g.…”

Section: Introductionmentioning

confidence: 99%

Dissecting the cosmic infra-red background withHerschel/PEP

Berta

Magnelli

Lutz

et al. 2010

A&A

112

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The constituents of the cosmic IR background (CIB) are studied at its peak wavelengths (100 and 160 μm) by exploiting Herschel/PACS observations of the GOODS-N, Lockman Hole, and COSMOS fields in the PACS evolutionary probe (PEP) guaranteed-time survey. The GOODS-N data reach 3σ depths of ∼3.0 mJy at 100 μm and ∼5.7 mJy at 160 μm. At these levels, source densities are 40 and 18 beams/source, respectively, thus hitting the confusion limit at 160 μm. Differential number counts extend from a few mJy up to 100-200 mJy, and are approximated as a double power law, with the break lying between 5 and 10 mJy. The available ancillary information allows us to split number counts into redshift bins. At z ≤ 0.5 we isolate a class of luminous sources (L IR ∼ 10 11 L ), whose SEDs resemble late-spiral galaxies, peaking at ∼130 μm restframe and significantly colder than what is expected on the basis of pre-Herschel models. By integrating number counts over the whole covered flux range, we obtain a surface brightness of 6.36± 1.67 and 6.58± 1.62 [nW m −2 sr −1 ] at 100 and 160 μm, resolving ∼45% and ∼52% of the CIB, respectively. When stacking 24 μm sources, the inferred CIB lies within 1.1σ and 0.5σ from direct measurements in the two bands, and fractions increase to 50% and 75%. Most of this resolved CIB fraction was radiated at z ≤ 1.0, with 160 μm sources found at higher redshift than 100 μm ones.

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Extragalactic Results from the Infrared Space Observatory

Cited by 274 publications

References 267 publications

PACS Evolutionary Probe (PEP) – AHerschelkey program

PACS Evolutionary Probe (PEP) – AHerschelkey program

TheHerschelDwarf Galaxy Survey

Dissecting the cosmic infra-red background withHerschel/PEP

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