A Significant Population of Very Luminous Dust‐Obscured Galaxies at Redshift<i>z</i>∼ 2

Dey, Arjun; Soifer, B. T.; Desai, Vandana; Brand, Kate; Floc’h, E. Le; Brown, M. J. I.; Jannuzi, Buell T.; Armus, L.; Bussmann, R. Shane; Brodwin, M.; Bian, Chao; Eisenhardt, Peter; Higdon, Sarah J.U.; Weedman, D. W.; Willner, S. P.

doi:10.1086/529516

Cited by 285 publications

(547 citation statements)

References 72 publications

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“…A key population identified with Spitzer MIPS are 24 µm sources (Yan et al, 2004a,b;Sajina et al, 2008;Donley et al, 2010;Zamojski et al, 2011;Sajina et al, 2012), and the subset of this population, Dust Obscured Galaxies (DOGs Dey et al, 2008). DOG selection requires 24µm emission and a very red color between optical R-band and 24µm.…”

Section: Multiband Imaging Photometer For Spitzer [Mips] 2003-2009mentioning

confidence: 99%

“…This population of z ∼ 2 24µm-selected DSFGs was studied in detail by Dey et al (2008) who outline the selection of Dust Obscured Galaxies (DOGs) to especially target this extremely luminous subset of the 24µm-population at z =1.99±0.45. The AGN contribution to these DOGs' luminosity is estimated at ∼50%, although this fraction is a function of observed 24µm flux density, S 24 , with fainter targets less dominated by AGN-driven emission.…”

Section: Redshift Distributions Of 24 µM Selected Dsfg Populationsmentioning

confidence: 99%

“…The population of Dust Obscured Galaxies (DOGs; Dey et al, 2008;Pope et al, 2008a) define the population of 24µm-selected galaxies that have extremely red colors (i.e. (R-[24])≥14 mags [Vega]).…”

Section: Mid-infrared Spitzer-selected Populationsmentioning

confidence: 99%

“…The formal selection is defined in Dey et al (2008) as galaxies which satisfy the following two criteria: (1) F 24µm ≥ 0.3 mJy, and (2) (R − [24]) ≥ 14 (Vega) mag. This corresponds to flux density ratios F 24µm /F R ≥ 982.…”

Section: Glossary Of Dusty Star-forming Galaxy Acronymsmentioning

confidence: 99%

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Dusty star-forming galaxies at high redshift

2014

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Far-infrared and submillimeter wavelength surveys have now established the important role of dusty, star-forming galaxies (DSFGs) in the assembly of stellar mass and the evolution of massive galaxies in the Universe. The brightest of these galaxies have infrared luminosities in excess of 10 13 L with implied star-formation rates of thousands of solar masses per year. They represent the most intense starbursts in the Universe, yet many are completely optically obscured. Their easy detection at submm wavelengths is due to dust heated by ultraviolet radiation of newly forming stars. When summed up, all of the dusty, star-forming galaxies in the Universe produce an infrared radiation field that has an equal energy density as the direct starlight emission from all galaxies visible at ultraviolet and optical wavelengths. The bulk of this infrared extragalactic background light emanates from galaxies as diverse as gas-rich disks to mergers of intense starbursting galaxies. Major advances in far-infrared instrumentation in recent years, both spacebased and ground-based, has led to the detection of nearly a million DSFGs, yet our understanding of the underlying astrophysics that govern the start and end of the dusty starburst phase is still in nascent stage. This review is aimed at summarizing the current status of DSFG studies, focusing especially on the detailed characterization of the bestunderstood subset (submillimeter galaxies, who were summarized in the last review of this field over a decade ago, Blain et al. 2002), but also the selection and characterization of more recently discovered DSFG populations. We review DSFG population statistics, their physical properties including dust, gas and stellar contents, their environments, and current theoretical models related to the formation and evolution of these galaxies.

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Section: Multiband Imaging Photometer For Spitzer [Mips] 2003-2009mentioning

confidence: 99%

Section: Redshift Distributions Of 24 µM Selected Dsfg Populationsmentioning

confidence: 99%

Section: Mid-infrared Spitzer-selected Populationsmentioning

confidence: 99%

Section: Glossary Of Dusty Star-forming Galaxy Acronymsmentioning

confidence: 99%

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Dusty star-forming galaxies at high redshift

2014

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“…Partial, but still reliable, information (at least in a statistical sense) can be obtained through the analysis of the emission in bands where differences between nuclear and star formation emission are emphasized, comparing the observed SEDs with galaxy templates over a range as broad as possible. In particular, the combination of observed-frame mid-infrared, near infrared and optical flux ratios has been exploited recently in the literature to isolate obscured AGN (see, e.g., Martinez-Sansigre et al 2005, 2006Fiore et al 2008;Donley et al 2008;Dey et al 2008). …”

Section: Observed Frame Colorsmentioning

confidence: 99%

Black hole growth and starburst activity atz= 0.6–4 in the Chandra Deep Field South

Brusa¹,

Fiore

Santini

et al. 2009

A&A

103

113

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Aims. The co-evolution of host galaxies and the active black holes which reside in their centre is one of the most important topics in modern observational cosmology. Here we present a study of the properties of obscured active galactic nuclei (AGN) detected in the CDFS 1 Ms observation and their host galaxies. Methods. We limited the analysis to the MUSIC area, for which deep K-band observations obtained with ISAAC@VLT are available, ensuring accurate identifications of the counterparts of the X-ray sources as well as reliable determination of photometric redshifts and galaxy parameters, such as stellar masses and star formation rates. In particular, we: 1) refined the X-ray/infrared/optical association of 179 sources in the MUSIC area detected in the Chandra observation; 2) studied the host galaxies observed and rest frame colors and properties. Results. We found that X-ray selected (L X > ∼ 10 42 erg s −1 ) AGN show Spitzer colors consistent with both AGN and starburst dominated infrared continuum; the latter would not have been selected as AGN from infrared diagnostics. The host galaxies of X-ray selected obscured AGN are all massive (M * > 10 10 M ) and, in 50% of the cases, are also actively forming stars (1/SSFR < t Hubble ) in dusty environments. The median L/L Edd value of the active nucleus is between 2% and 10% depending on the assumed M BH /M * ratio. Finally, we found that the X-ray selected AGN fraction increases with the stellar mass up to a value of ∼30% at z > 1 and M * > 3 × 10 11 M , a fraction significantly higher than in the local Universe for AGN of similar luminosities.

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Small jets in radio‐loud hot DOGs

et al. 2016

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We address the impact of young radio jets on the ISM and star formation in a sample of radiatively efficient, highly obscured, radio AGN with look back times that place them near the peak of the galaxy and BH building era, z ∼ 1–3. By selecting systems with a high mid‐infrared (MIR) luminosity we aim to identify radiatively efficient (“quasar‐mode” or “radiative‐mode”) AGN in a peak fueling phase, and by selecting compact radio sources we favor young or re‐generated radio jets which are confined within the hosts. By selecting AGN which are very red through the optical‐MIR we favor highly obscured systems likely to have been recently merger‐triggered and still in the pre‐blow‐out phase of AGN feedback into the surrounding ISM. ALMA imaging at 345 GHz of 49 sources has revealed that they are accretion dominated, relative to star formation, with luminosities reaching 1014 L⊙. Extensive VLA imaging at 8–10 GHz in both A‐array and B‐array for 155 sources reveals that the majority of these powerful radio systems are compact on <2–5 kpc scales while some have resolved structures on 3–25 kpc scales, and a small number have giant radio lobes on hundreds of kpc scales. The majority of the GHz range radio SEDs are typical of optically thin synchrotron, however for the 34 sources with data at more than 2 frequencies, 40% are likely to be CSS, GPS, or HFP sources. VLBA imaging of 62 sources reveals varied morphologies, from unresolved sources to complex multicomponent 1–10 mas scale structures. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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A Significant Population of Very Luminous Dust‐Obscured Galaxies at Redshiftz∼ 2

Cited by 285 publications

References 72 publications

Dusty star-forming galaxies at high redshift

Dusty star-forming galaxies at high redshift

Black hole growth and starburst activity atz= 0.6–4 in the Chandra Deep Field South

Small jets in radio‐loud hot DOGs

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