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Start Over Author "Georgakakis, A." Publisher american astronomical society
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1. The Spatial Clustering of ROSAT All-Sky Survey Active Galactic Nuclei. V. The Evolution of Broad-line AGN Clustering Properties in the Last 6 Gyr

Author

Krumpe, Mirko, primary, Miyaji, Takamitsu, additional, Georgakakis, Antonis, additional, Schulze, Andreas, additional, Coil, Alison L., additional, Dwelly, Tom, additional, Coffey, Damien, additional, Comparat, Johan, additional, Aceves, Héctor, additional, Salvato, Mara, additional, Merloni, Andrea, additional, Maraston, Claudia, additional, Nandra, Kirpal, additional, Brownstein, Joel R., additional, and Schneider, Donald P., additional

Published
2023
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3. The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-Ray Source Catalog and Multiband Counterparts

Author

Liu, Teng, primary, Merloni, Andrea, additional, Simm, Torben, additional, Green, Paul J., additional, Brandt, William N., additional, Schneider, Donald P., additional, Dwelly, Tom, additional, Salvato, Mara, additional, Buchner, Johannes, additional, Shen, Yue, additional, Nandra, Kirpal, additional, Georgakakis, Antonis, additional, and Ho, Luis C., additional

Published
2020
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4. Building Robust Active Galactic Nuclei Mock Catalogs to Unveil Black Hole Evolution and for Survey Planning

Author

V. Allevato, F. Shankar, C. Marsden, U. Rasulov, A. Viitanen, A. Georgakakis, A. Ferrara, A. Finoguenov, Department of Physics, and Helsinki Institute of Physics

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 115 Astronomy, Space science, GALAXY POPULATION, SCALING RELATIONS, 114 Physical sciences, STAR-FORMATION, COLD DARK-MATTER, HALO OCCUPATION, HOST GALAXIES, Space and Planetary Science, ACCRETION RATES, X-RAY, STELLAR MASS FUNCTION, EDDINGTON RATIOS, Astrophysics::Galaxy Astrophysics
Abstract

The statistical distributions of active galactic nuclei (AGNs), i.e., accreting supermassive black holes (BHs), in mass, space, and time are controlled by a series of key properties, namely, the BH-galaxy scaling relations, Eddington ratio distributions, and fraction of active BH (duty cycle). Shedding light on these properties yields strong constraints on the AGN triggering mechanisms while providing a clear baseline to create useful mock catalogs for the planning of large galaxy surveys. Here we delineate a robust methodology to create mock AGN catalogs built on top of large N-body dark matter simulations via state-of-the-art semiempirical models. We show that by using as independent tests the AGN clustering at fixed X-ray luminosity, galaxy stellar mass, and BH mass, along with the fraction of AGNs in groups and clusters, it is possible to significantly narrow down the choice in the relation between BH mass and host galaxy stellar mass, the duty cycle, and the average Eddington ratio distribution, delivering well-suited constraints to guide cosmological models for the coevolution of BHs and galaxies. Avoiding such a step-by-step methodology inevitably leads to strong degeneracies in the final mock catalogs, severely limiting their usefulness in understanding AGN evolution and in survey planning and testing.

Published
2021
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6. CANDELS: Elevated black hole growth in the progenitors of compact quiescent galaxies at z ? 2

Author

Kocevski, Dale D., Barro, Guillermo, Faber, S.M., Dekel, Avishai, Somerville, Rachel S., Young, Joshua A., Williams, Christina C., McIntosh, Daniel H., Georgakakis, Antonis, Hasinger, Guenther, Nandra, Kirpal, Civano, Francesca, Alexander, David M., Almaini, Omar, Conselice, Christopher J., Donley, Jennifer L., Ferguson, Harry C., Giavalisco, Mauro, Grogin, Norman A., Hathi, Nimish, Hawkins, Matthew, Koekemoer, Anton M., Koo, David C., McGrath, Elizabeth J., Mobasher, Bahram, Pforr, Janine, Primack, Joel R., Santini, Paola, Stefanon, Mauro, Trump, Jonathan R., van der Wel, Arjen, Wuyts, Stijn, and Yan, Haojing

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We examine the fraction of massive (M* > 1010 M) compact star-forming galaxies (cSFGs) that host an active galactic nucleus (AGN) at z ~ 2. These cSFGs are likely the direct progenitors of the compact quiescent galaxies observed at this epoch, which are the first population of passive galaxies to appear in large numbers in the early Universe. We identify cSFGs that host an AGN using a combination of Hubble WFC3 imaging and Chandra X-ray observations in four fields: the Chandra Deep Fields, the Extended Groth Strip, and the UKIDSS Ultra Deep Survey field. We find that - 39.2+ % 3.6 3.9 (65/166) of cSFGs at 1.4 < z < 3.0 host an X-ray detected AGN. This fraction is 3.2 times higher than the incidence of AGN in extended star-forming galaxies with similar masses at these redshifts. This difference is significant at the 6.2s level. Our results are consistent with models in which cSFGs are formed through a dissipative contraction that triggers a compact starburst and concurrent growth of the central black hole. We also discuss our findings in the context of cosmological galaxy evolution simulations that require feedback energy to rapidly quench cSFGs. We show that the AGN fraction peaks precisely where energy injection is needed to reproduce the decline in the number density of cSFGs with redshift. Our results suggest that the first abundant population of massive quenched galaxies emerged directly following a phase of elevated supermassive black hole growth and further hints at a possible connection between AGN and the rapid quenching of star formation in these galaxies.

Published
2017

7. X-UDS: The Chandra Legacy Survey of the UKIDSS Ultra Deep Survey Field

Author

Kocevski, Dale D., primary, Hasinger, Guenther, additional, Brightman, Murray, additional, Nandra, Kirpal, additional, Georgakakis, Antonis, additional, Cappelluti, Nico, additional, Civano, Francesca, additional, Li, Yuxuan, additional, Li, Yanxia, additional, Aird, James, additional, Alexander, David M., additional, Almaini, Omar, additional, Brusa, Marcella, additional, Buchner, Johannes, additional, Comastri, Andrea, additional, Conselice, Christopher J., additional, Dickinson, Mark A., additional, Finoguenov, Alexis, additional, Gilli, Roberto, additional, Koekemoer, Anton M., additional, Miyaji, Takamitsu, additional, Mullaney, James R., additional, Papovich, Casey, additional, Rosario, David, additional, Salvato, Mara, additional, Silverman, John D., additional, Somerville, Rachel S., additional, and Ueda, Yoshihiro, additional

Published
2018
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8. AEGIS: THE CLUSTERING OF X-RAY ACTIVE GALACTIC NUCLEUS RELATIVE TO GALAXIES ATz∼ 1

Author

Jeffrey A. Newman, Christopher N. A. Willmer, Darren J. Croton, Benjamin J. Weiner, Antonis Georgakakis, Michael C. Cooper, E. S. Laird, Alison L. Coil, K. Nandra, Renbin Yan, Marc Davis, and David C. Koo

Subjects
Physics, Brightness, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Astronomy and Astrophysics, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Power law, Galaxy, Luminosity, Space and Planetary Science, 0103 physical sciences, Magnitude (astronomy), Halo, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We measure the clustering of non-quasar X-ray AGN at z=0.7-1.4 in the AEGIS field. Using the cross-correlation of 113 Chandra-selected AGN, with a median log L_X=42.8 erg s^-1, with ~5,000 DEEP2 galaxies, we find that the X-ray AGN are fit by a power law with a clustering scale length of r_0=5.95 +/-0.90 h^-1 Mpc and slope gamma=1.66 +/-0.22. X-ray AGN have a similar clustering amplitude as red, quiescent and `green' transition galaxies at z~1 and are significantly more clustered than blue, star-forming galaxies. The X-ray AGN clustering strength is primarily determined by the host galaxy color; AGN in red host galaxies are significantly more clustered than AGN in blue host galaxies, with a relative bias that is similar to that of red to blue DEEP2 galaxies. We detect no dependence of clustering on optical brightness, X-ray luminosity, or hardness ratio within the ranges probed here. We find evidence for galaxies hosting X-ray AGN to be more clustered than a sample of galaxies with matching joint optical color and magnitude distributions. This implies that galaxies hosting X-ray AGN are more likely to reside in groups and more massive dark matter halos than galaxies of the same color and luminosity without an X-ray AGN. In comparison to optically-selected quasars in the DEEP2 fields, we find that X-ray AGN at z~1 are more clustered than optically-selected quasars (with a 2.6-sigma significance) and therefore likely reside in more massive dark matter halos. Our results are consistent with galaxies undergoing a quasar phase while in the blue cloud before settling on the red sequence with a lower-luminosity X-ray AGN, if they are similar objects at different evolutionary stages.

Published
2009
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9. AEGIS-X: THE CHANDRA DEEP SURVEY OF THE EXTENDED GROTH STRIP

Author

Pauline Barmby, James Aird, Giovanni G. Fazio, Alison L. Coil, S. M. Faber, Kirpal Nandra, Mark E. Davis, Elise S. Laird, David C. Koo, Christopher N. A. Willmer, Puragra Guhathakurta, Christopher J. Conselice, Antonis Georgakakis, and Vicki L. Sarajedini

Subjects
Physics, Data products, Point source, Likelihood ratio method, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Poisson distribution, Contamination rate, symbols.namesake, Extended Groth Strip, Space and Planetary Science, symbols, Limit (mathematics), Data reduction
Abstract

We present the AEGIS-X survey, a series of deep Chandra ACIS-I observations of the Extended Groth Strip. The survey comprises pointings at 8 separate positions, each with nominal exposure 200ks, covering a total area of approximately 0.67 deg2 in a strip of length 2 degrees. We describe in detail an updated version of our data reduction and point source detection algorithms used to analyze these data. A total of 1325 band-merged sources have been found to a Poisson probability limit of 4e-6, with limiting fluxes of 5.3e-17 erg/cm2/s in the soft (0.5-2 keV) band and 3.8e-16 erg/cm2/s in the hard (2-10 keV) band. We present simulations verifying the validity of our source detection procedure and showing a very small, 17 pages, 9 figures. Accepted for publication in ApJS. Data products are available at http://astro.imperial.ac.uk/research/aegis/

Published
2008
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10. CANDELS: Elevated Black Hole Growth in the Progenitors of Compact Quiescent Galaxies atz∼ 2

Author

Kocevski, Dale D., primary, Barro, Guillermo, additional, Faber, S. M., additional, Dekel, Avishai, additional, Somerville, Rachel S., additional, Young, Joshua A., additional, Williams, Christina C., additional, McIntosh, Daniel H., additional, Georgakakis, Antonis, additional, Hasinger, Guenther, additional, Nandra, Kirpal, additional, Civano, Francesca, additional, Alexander, David M., additional, Almaini, Omar, additional, Conselice, Christopher J., additional, Donley, Jennifer L., additional, Ferguson, Harry C., additional, Giavalisco, Mauro, additional, Grogin, Norman A., additional, Hathi, Nimish, additional, Hawkins, Matthew, additional, Koekemoer, Anton M., additional, Koo, David C., additional, McGrath, Elizabeth J., additional, Mobasher, Bahram, additional, Pérez González, Pablo G., additional, Pforr, Janine, additional, Primack, Joel R., additional, Santini, Paola, additional, Stefanon, Mauro, additional, Trump, Jonathan R., additional, van der Wel, Arjen, additional, Wuyts, Stijn, additional, and Yan, Haojing, additional

Published
2017
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11. AEGIS: The Color-Magnitude Relation for X-Ray-selected Active Galactic Nuclei

Author

S. M. Faber, A. Georgakakis, K. Nandra, Jeffrey A. Newman, Christopher N. A. Willmer, E. S. Laird, Marc Davis, David C. Koo, Michael C. Cooper, and D. J. Croton

Subjects
QSOS, Physics, Active galactic nucleus, 010308 nuclear & particles physics, Star formation, Astrophysics::High Energy Astrophysical Phenomena, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Accretion (astrophysics), Luminosity, Black hole, Extended Groth Strip, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We discuss the relationship between rest-frame color and optical luminosity for X-ray sources in the range 0.6

Published
2007
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12. AEGIS: The Environment of X-Ray Sources at z ≈ 1

Author

Alison L. Coil, Michael Davis, Jeffrey A. Newman, Kirpal Nandra, E. S. Laird, S. M. Faber, Michael C. Cooper, Darren J. Croton, Antonis Georgakakis, and Brian F. Gerke

Subjects
Physics, education.field_of_study, Supermassive black hole, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Population, X-ray, International survey, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radius, Astrophysics, Galaxy, Extended Groth Strip, Space and Planetary Science, education, Astrophysics::Galaxy Astrophysics
Abstract

We explore the environment of z ≈ 1 AGNs using a sample of 53 spectroscopically identified X-ray sources in the All-Wavelength Extended Groth Strip International Survey. We quantify the local density in the vicinity of an X-ray source by measuring the projected surface density of spectroscopically identified optical galaxies within a radius defined by the third-nearest neighbor. Our main result is that X-ray-selected AGNs at z ≈ 1 avoid underdense regions at a 99.89% confidence level. Moreover, although we find that the overall population shares the same (rich) environment with optical galaxies of the similar U - B and MB, there is also tentative evidence (96%) that AGNs with blue colors (U - B 1) reside in denser environments compared to optical galaxies. We argue that the results above are a consequence of the whereabouts of massive galaxies capable of hosting supermassive black holes at their centers, with available cold-gas reservoirs, the fuel for AGN activity. At z ≈ 1 an increasing fraction of such systems is found in dense regions.

Published
2007
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13. AEGIS: Host Galaxy Morphologies of X-Ray-selected and Infrared-selected Active Galactic Nuclei at 0.2 ≤ z < 1.2

Author

Michael C. Cooper, S. Q. Park, David C. Koo, E. S. Laird, Pauline Barmby, Alison L. Coil, Christopher N. A. Willmer, K. Nandra, Ben Weiner, S. M. Faber, Kai G. Noeske, C. M. Pierce, S. P. Willner, Anton M. Koekemoer, L. Lin, Jennifer M. Lotz, Stephen Gwyn, Joel R. Primack, and A. Georgakakis

Subjects
Physics, Active galactic nucleus, 010308 nuclear & particles physics, Infrared, Direct evidence, Astrophysics::High Energy Astrophysical Phenomena, X-ray, Flux, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Redshift, Extended Groth Strip, Space and Planetary Science, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We visually and quantitatively determine the host galaxy morphologies of 94 intermediate redshift (0.2 < z < 1.2) active galactic nuclei (AGN), selected using Chandra X-ray and Spitzer mid-infrared data in the Extended Groth Strip. Using recently developed morphology measures, the second-order moment of the brightest 20% of a galaxy's flux (M_{20}) and the Gini coefficient, we find that X-ray-selected AGN mostly reside in E/S0/Sa galaxies (53^{+11}_{-10}%), while IR-selected AGN show no clear preference for host morphology. X-ray-selected AGN hosts are members of close pairs more often than the field population by a factor of 3.3+/-1.4, but most of these pair members appear to be undisturbed early-type galaxies and do not tend to show direct evidence of gravitational perturbations or interactions. Thus, the activation mechanism for AGN activity remains unknown, even for pair members.

Published
2007
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14. AEGIS-X: Deep Chandra Imaging of the Central Groth Strip

Author

Michael C. Cooper, Guillermo Barro, Toru Yamada, Mara Salvato, Kirpal Nandra, Puragra Guhathakurta, James Aird, Alison L. Coil, Pauline Barmby, Antonis Georgakakis, S. M. Faber, Pablo G. Pérez-González, Giovanni G. Fazio, David C. Koo, Rob Ivison, Christopher N. A. Willmer, Michael Davis, R.-R. Chary, S. D. J. Gwyn, Elise S. Laird, Mark Dickinson, Li-Ting Hsu, J. S. Huang, J. A. Newman, and Cyprian Rangel

Subjects
Astrofísica, Active galactic nucleus, astro-ph.GA, nuclei [galaxies], FOS: Physical sciences, Astrophysics, Astronomy & Astrophysics, Central region, Atomic, Physical Chemistry, Photometry (optics), Particle and Plasma Physics, Extended Groth Strip, surveys, Hubble space telescope, Nuclear, Physics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Molecular, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Astronomía, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), active [galaxies], Astrophysics - High Energy Astrophysical Phenomena, Astronomical and Space Sciences, Physical Chemistry (incl. Structural)
Abstract

We present the results of deep \chandra\ imaging of the central region of the Extended Groth Strip, the AEGIS-X Deep (AEGIS-XD) survey. When combined with previous \chandra\ observations of a wider area of the strip, AEGIS-X Wide (AEGIS-XW; Laird et~al. 2009), these provide data to a nominal exposure depth of 800ks in the three central ACIS-I fields, a region of approximately $0.29$~deg$^{2}$. This is currently the third deepest X-ray survey in existence, a factor $\sim 2-3$ shallower than the Chandra Deep Fields (CDFs) but over an area $\sim 3$ times greater than each CDF. We present a catalogue of 937 point sources detected in the deep \chandra\ observations. We present identifications of our X-ray sources from deep ground-based, Spitzer, GALEX and HST imaging. Using a likelihood ratio analysis, we associate multi band counterparts for 929/937 of our X-ray sources, with an estimated 95~\% reliability, making the identification completeness approximately 94~\% in a statistical sense. Reliable spectroscopic redshifts for 353 of our X-ray sources are provided predominantly from Keck (DEEP2/3) and MMT Hectospec, so the current spectroscopic completeness is $\sim 38$~per cent. For the remainder of the X-ray sources, we compute photometric redshifts based on multi-band photometry in up to 35 bands from the UV to mid-IR. Particular attention is given to the fact that the vast majority the X-ray sources are AGN and require hybrid templates. Our photometric redshifts have mean accuracy of $\sigma=0.04$ and an outlier fraction of approximately 5\%, reaching $\sigma=0.03$ with less than 4\% outliers in the area covered by CANDELS . The X-ray, multi-wavelength photometry and redshift catalogues are made publicly available., Comment: 35 pages, 15 figures, accepted for publication in ApJS

Published
2015
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15. X-Ray Number Counts of Normal Galaxies

Author

Andreas Zezas, Antonis Georgakakis, I. Georgantopoulos, A. Akylas, and P. Tzanavaris

Subjects
Physics, education.field_of_study, Astrophysics (astro-ph), Population, X-ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Galaxy, Flux ratio, Early type, Space and Planetary Science, education, Luminosity function (astronomy)
Abstract

We use the number counts of X-ray selected normal galaxies to explore their evolution by combining the most recent wide-angle shallow and pencil-beam deep samples available. The differential X-ray number counts, dN/dS, for early and late-type normal galaxies are constructed separately and then compared with the predictions of the local X-ray luminosity function under different evolution scenarios. The dN/dS of early type galaxies is consistent with no evolution out to z~0.5. For late-type galaxies our analysis suggests that it is the sources with X-ray--to--optical flux ratio logfx/fopt>-2 that are evolving the fastest. Including these systems in the late-type galaxy sample yields evolution of the form ~(1+z)^{2.7} out to z~0.4. On the contrary late-type sources with logfx/fopt-2 population comprises the most powerful and fast evolving starbursts at moderate and high-z. We argue that although residual low-luminosity AGN contamination may bias our results toward stronger evolution, this is unlikely to modify our main conclusions., Comment: to appear in ApJL

Published
2006
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16. XMM-Newton Observations of Optically Selected Sloan Digital Sky Survey Clusters

Author

Spyros Basilakos, A. Georgakakis, I. Georgantopoulos, and M. Plionis

Subjects
Physics, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, Cluster (physics), Astrophysics::Solar and Stellar Astrophysics, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics::Galaxy Astrophysics, Galaxy, Luminosity
Abstract

We explore the X-ray properties of a subset of the optically selected SDSS cluster sample of Goto et al. (2002), by analysing seven public XMM-{\em Newton} pointings, with exposure times ranging from $\sim$ 4 to 46 ksec. There are in total 17 SDSS clusters out of which only eight are detected at X-ray wavelengths with $\rm f_{0.5-2keV}\magcir 1.2 \times 10^{-14}$ ergs cm$^{-2}$ s$^{-1}$. For the remaining 9 SDSS clusters we estimate their 3$\sigma$ luminosity upper limits (corresponding to $L_x\mincir 5\times 10^{42}$ ergs/sec in the 0.5-2 keV band). This relatively low luminosity suggests that if real structures, these galaxy aggregations correspond to poor groups of galaxies. Using the SDSS photometric catalogue we also derive the cluster optical $r$-band luminosities. The resulting scaling relations ($L_{\rm opt}-L_x$, $L_{\rm opt}-T_x$) are consistent with those of other recent studies.

Published
2005
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17. The Phoenix Deep Survey: Optical and Near‐infrared Imaging Catalogs

Author

Lawrence Cram, Jose Afonso, Bahram Mobasher, Andrew M. Hopkins, Ben Chan, Carolina Almeida, Mark Sullivan, and Antonis Georgakakis

Subjects
Physics, Age of the universe, biology, Star formation, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, biology.organism_classification, Redshift, Galaxy, Wavelength, Space and Planetary Science, Primary (astronomy), Phoenix, Astrophysics::Galaxy Astrophysics, Photometric redshift
Abstract

The Phoenix Deep Survey is a multi-wavelength galaxy survey based on deep 1.4 GHz radio imaging (Hopkins et al., 2003). The primary goal of this survey is to investigate the properties of star formation in galaxies and to trace the evolution in those properties to a redshift z=1, covering a significant fraction of the age of the Universe. By compiling a sample of star-forming galaxies based on selection at radio wavelengths we eliminate possible biases due to dust obscuration, a significant issue when selecting objects at optical and ultraviolet wavelengths. In this paper, we present the catalogs and results of deep optical (UBVRI) and near-infrared (Ks) imaging of the deepest region of the existing decimetric radio imaging. The observations and data-processing are summarised and the construction of the optical source catalogs described, together with the details of the identification of candidate optical counterparts to the radio catalogs. Based on our UBVRIKs imaging, photometric redshift estimates for the optical counterparts to the radio detections are explored., 56 pages inc. 16 page table; November issue of ApJS

Published
2004
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18. The Phoenix Deep Survey: The 1.4 GH[CLC]z[/CLC] Microjansky Catalog

Author

Ben Chan, A. Georgakakis, Andrew M. Hopkins, Lawrence Cram, Bahram Mobasher, and Jose Afonso

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Gaussian, Astrophysics::Instrumentation and Methods for Astrophysics, Flux, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, law.invention, Telescope, symbols.namesake, Space and Planetary Science, law, Image noise, symbols, Galaxy formation and evolution, Range (statistics), Source counts, Astrophysics::Galaxy Astrophysics
Abstract

The initial Phoenix Deep Survey (PDS) observations with the Australia Telescope Compact Array have been supplemented by additional 1.4 GHz observations over the past few years. Here we present details of the construction of a new mosaic image covering an area of 4.56 square degrees, an investigation of the reliability of the source measurements, and the 1.4 GHz source counts for the compiled radio catalogue. The mosaic achieves a 1-sigma rms noise of 12 microJy at its most sensitive, and a homogeneous radio-selected catalogue of over 2000 sources reaching flux densities as faint as 60 microJy has been compiled. The source parameter measurements are found to be consistent with the expected uncertainties from the image noise levels and the Gaussian source fitting procedure. A radio-selected sample avoids the complications of obscuration associated with optically-selected samples, and by utilising complementary PDS observations including multicolour optical, near-infrared and spectroscopic data, this radio catalogue will be used in a detailed investigation of the evolution in star-formation spanning the redshift range 0 < z < 1. The homogeneity of the catalogue ensures a consistent picture of galaxy evolution can be developed over the full cosmologically significant redshift range of interest. The 1.4 GHz mosaic image and the source catalogue are available on the web at this http URL or from the authors by request.

Published
2003
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19. TOWARD AN UNDERSTANDING OF CHANGING-LOOK QUASARS: AN ARCHIVAL SPECTROSCOPIC SEARCH IN SDSS

Author

Ruan, John J., primary, Anderson, Scott F., additional, Cales, Sabrina L., additional, Eracleous, Michael, additional, Green, Paul J., additional, Morganson, Eric, additional, Runnoe, Jessie C., additional, Shen, Yue, additional, Wilkinson, Tessa D., additional, Blanton, Michael R., additional, Dwelly, Tom, additional, Georgakakis, Antonis, additional, Greene, Jenny E., additional, LaMassa, Stephanie M., additional, Merloni, Andrea, additional, and Schneider, Donald P., additional

Published
2016
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20. THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATA

Author

Dawson, Kyle S., primary, Kneib, Jean-Paul, additional, Percival, Will J., additional, Alam, Shadab, additional, Albareti, Franco D., additional, Anderson, Scott F., additional, Armengaud, Eric, additional, Aubourg, Éric, additional, Bailey, Stephen, additional, Bautista, Julian E., additional, Berlind, Andreas A., additional, Bershady, Matthew A., additional, Beutler, Florian, additional, Bizyaev, Dmitry, additional, Blanton, Michael R., additional, Blomqvist, Michael, additional, Bolton, Adam S., additional, Bovy, Jo, additional, Brandt, W. N., additional, Brinkmann, Jon, additional, Brownstein, Joel R., additional, Burtin, Etienne, additional, Busca, N. G., additional, Cai, Zheng, additional, Chuang, Chia-Hsun, additional, Clerc, Nicolas, additional, Comparat, Johan, additional, Cope, Frances, additional, Croft, Rupert A. C., additional, Cruz-Gonzalez, Irene, additional, Costa, Luiz N. da, additional, Cousinou, Marie-Claude, additional, Darling, Jeremy, additional, Macorra, Axel de la, additional, Torre, Sylvain de la, additional, Delubac, Timothée, additional, Bourboux, Hélion du Mas des, additional, Dwelly, Tom, additional, Ealet, Anne, additional, Eisenstein, Daniel J., additional, Eracleous, Michael, additional, Escoffier, S., additional, Fan, Xiaohui, additional, Finoguenov, Alexis, additional, Font-Ribera, Andreu, additional, Frinchaboy, Peter, additional, Gaulme, Patrick, additional, Georgakakis, Antonis, additional, Green, Paul, additional, Guo, Hong, additional, Guy, Julien, additional, Ho, Shirley, additional, Holder, Diana, additional, Huehnerhoff, Joe, additional, Hutchinson, Timothy, additional, Jing, Yipeng, additional, Jullo, Eric, additional, Kamble, Vikrant, additional, Kinemuchi, Karen, additional, Kirkby, David, additional, Kitaura, Francisco-Shu, additional, Klaene, Mark A., additional, Laher, Russ R., additional, Lang, Dustin, additional, Laurent, Pierre, additional, Goff, Jean-Marc Le, additional, Li, Cheng, additional, Liang, Yu, additional, Lima, Marcos, additional, Lin, Qiufan, additional, Lin, Weipeng, additional, Lin, Yen-Ting, additional, Long, Daniel C., additional, Lundgren, Britt, additional, MacDonald, Nicholas, additional, Maia, Marcio Antonio Geimba, additional, Malanushenko, Elena, additional, Malanushenko, Viktor, additional, Mariappan, Vivek, additional, McBride, Cameron K., additional, McGreer, Ian D., additional, Ménard, Brice, additional, Merloni, Andrea, additional, Meza, Andres, additional, Montero-Dorta, Antonio D., additional, Muna, Demitri, additional, Myers, Adam D., additional, Nandra, Kirpal, additional, Naugle, Tracy, additional, Newman, Jeffrey A., additional, Noterdaeme, Pasquier, additional, Nugent, Peter, additional, Ogando, Ricardo, additional, Olmstead, Matthew D., additional, Oravetz, Audrey, additional, Oravetz, Daniel J., additional, Padmanabhan, Nikhil, additional, Palanque-Delabrouille, Nathalie, additional, Pan, Kaike, additional, Parejko, John K., additional, Pâris, Isabelle, additional, Peacock, John A., additional, Petitjean, Patrick, additional, Pieri, Matthew M., additional, Pisani, Alice, additional, Prada, Francisco, additional, Prakash, Abhishek, additional, Raichoor, Anand, additional, Reid, Beth, additional, Rich, James, additional, Ridl, Jethro, additional, Rodriguez-Torres, Sergio, additional, Rosell, Aurelio Carnero, additional, Ross, Ashley J., additional, Rossi, Graziano, additional, Ruan, John, additional, Salvato, Mara, additional, Sayres, Conor, additional, Schneider, Donald P., additional, Schlegel, David J., additional, Seljak, Uros, additional, Seo, Hee-Jong, additional, Sesar, Branimir, additional, Shandera, Sarah, additional, Shu, Yiping, additional, Slosar, Anže, additional, Sobreira, Flavia, additional, Streblyanska, Alina, additional, Suzuki, Nao, additional, Taylor, Donna, additional, Tao, Charling, additional, Tinker, Jeremy L., additional, Tojeiro, Rita, additional, Vargas-Magaña, Mariana, additional, Wang, Yuting, additional, Weaver, Benjamin A., additional, Weinberg, David H., additional, White, Martin, additional, Wood-Vasey, W. M., additional, Yeche, Christophe, additional, Zhai, Zhongxu, additional, Zhao, Cheng, additional, Zhao, Gong-bo, additional, Zheng, Zheng, additional, Zhu, Guangtun Ben, additional, and Zou, Hu, additional

Published
2016
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21. AEGIS-X: DEEP CHANDRA IMAGING OF THE CENTRAL GROTH STRIP

Author

Nandra, K., primary, Laird, E. S., additional, Aird, J. A., additional, Salvato, M., additional, Georgakakis, A., additional, Barro, G., additional, Perez-Gonzalez, P. G., additional, Barmby, P., additional, Chary, R.-R., additional, Coil, A., additional, Cooper, M. C., additional, Davis, M., additional, Dickinson, M., additional, Faber, S. M., additional, Fazio, G. G., additional, Guhathakurta, P., additional, Gwyn, S., additional, Hsu, L.-T., additional, Huang, J.-S., additional, Ivison, R. J., additional, Koo, D. C., additional, Newman, J. A., additional, Rangel, C., additional, Yamada, T., additional, and Willmer, C., additional

Published
2015
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22. THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III

Author

Alam, Shadab, primary, Albareti, Franco D., additional, Prieto, Carlos Allende, additional, Anders, F., additional, Anderson, Scott F., additional, Anderton, Timothy, additional, Andrews, Brett H., additional, Armengaud, Eric, additional, Aubourg, Éric, additional, Bailey, Stephen, additional, Basu, Sarbani, additional, Bautista, Julian E., additional, Beaton, Rachael L., additional, Beers, Timothy C., additional, Bender, Chad F., additional, Berlind, Andreas A., additional, Beutler, Florian, additional, Bhardwaj, Vaishali, additional, Bird, Jonathan C., additional, Bizyaev, Dmitry, additional, Blake, Cullen H., additional, Blanton, Michael R., additional, Blomqvist, Michael, additional, Bochanski, John J., additional, Bolton, Adam S., additional, Bovy, Jo, additional, Bradley, A. Shelden, additional, Brandt, W. N., additional, Brauer, D. E., additional, Brinkmann, J., additional, Brown, Peter J., additional, Brownstein, Joel R., additional, Burden, Angela, additional, Burtin, Etienne, additional, Busca, Nicolás G., additional, Cai, Zheng, additional, Capozzi, Diego, additional, Rosell, Aurelio Carnero, additional, Carr, Michael A., additional, Carrera, Ricardo, additional, Chambers, K. C., additional, Chaplin, William James, additional, Chen, Yen-Chi, additional, Chiappini, Cristina, additional, Chojnowski, S. Drew, additional, Chuang, Chia-Hsun, additional, Clerc, Nicolas, additional, Comparat, Johan, additional, Covey, Kevin, additional, Croft, Rupert A. C., additional, Cuesta, Antonio J., additional, Cunha, Katia, additional, Costa, Luiz N. da, additional, Rio, Nicola Da, additional, Davenport, James R. A., additional, Dawson, Kyle S., additional, Lee, Nathan De, additional, Delubac, Timothée, additional, Deshpande, Rohit, additional, Dhital, Saurav, additional, Dutra-Ferreira, Letícia, additional, Dwelly, Tom, additional, Ealet, Anne, additional, Ebelke, Garrett L., additional, Edmondson, Edward M., additional, Eisenstein, Daniel J., additional, Ellsworth, Tristan, additional, Elsworth, Yvonne, additional, Epstein, Courtney R., additional, Eracleous, Michael, additional, Escoffier, Stephanie, additional, Esposito, Massimiliano, additional, Evans, Michael L., additional, Fan, Xiaohui, additional, Fernández-Alvar, Emma, additional, Feuillet, Diane, additional, Ak, Nurten Filiz, additional, Finley, Hayley, additional, Finoguenov, Alexis, additional, Flaherty, Kevin, additional, Fleming, Scott W., additional, Font-Ribera, Andreu, additional, Foster, Jonathan, additional, Frinchaboy, Peter M., additional, Galbraith-Frew, J. G., additional, García, Rafael A., additional, García-Hernández, D. A., additional, Pérez, Ana E. García, additional, Gaulme, Patrick, additional, Ge, Jian, additional, Génova-Santos, R., additional, Georgakakis, A., additional, Ghezzi, Luan, additional, Gillespie, Bruce A., additional, Girardi, Léo, additional, Goddard, Daniel, additional, Gontcho, Satya Gontcho A, additional, Hernández, Jonay I. González, additional, Grebel, Eva K., additional, Green, Paul J., additional, Grieb, Jan Niklas, additional, Grieves, Nolan, additional, Gunn, James E., additional, Guo, Hong, additional, Harding, Paul, additional, Hasselquist, Sten, additional, Hawley, Suzanne L., additional, Hayden, Michael, additional, Hearty, Fred R., additional, Hekker, Saskia, additional, Ho, Shirley, additional, Hogg, David W., additional, Holley-Bockelmann, Kelly, additional, Holtzman, Jon A., additional, Honscheid, Klaus, additional, Huber, Daniel, additional, Huehnerhoff, Joseph, additional, Ivans, Inese I., additional, Jiang, Linhua, additional, Johnson, Jennifer A., additional, Kinemuchi, Karen, additional, Kirkby, David, additional, Kitaura, Francisco, additional, Klaene, Mark A., additional, Knapp, Gillian R., additional, Kneib, Jean-Paul, additional, Koenig, Xavier P., additional, Lam, Charles R., additional, Lan, Ting-Wen, additional, Lang, Dustin, additional, Laurent, Pierre, additional, Goff, Jean-Marc Le, additional, Leauthaud, Alexie, additional, Lee, Khee-Gan, additional, Lee, Young Sun, additional, Licquia, Timothy C., additional, Liu, Jian, additional, Long, Daniel C., additional, López-Corredoira, Martín, additional, Lorenzo-Oliveira, Diego, additional, Lucatello, Sara, additional, Lundgren, Britt, additional, Lupton, Robert H., additional, III, Claude E. Mack, additional, Mahadevan, Suvrath, additional, Maia, Marcio A. G., additional, Majewski, Steven R., additional, Malanushenko, Elena, additional, Malanushenko, Viktor, additional, Manchado, A., additional, Manera, Marc, additional, Mao, Qingqing, additional, Maraston, Claudia, additional, Marchwinski, Robert C., additional, Margala, Daniel, additional, Martell, Sarah L., additional, Martig, Marie, additional, Masters, Karen L., additional, Mathur, Savita, additional, McBride, Cameron K., additional, McGehee, Peregrine M., additional, McGreer, Ian D., additional, McMahon, Richard G., additional, Ménard, Brice, additional, Menzel, Marie-Luise, additional, Merloni, Andrea, additional, Mészáros, Szabolcs, additional, Miller, Adam A., additional, Miralda-Escudé, Jordi, additional, Miyatake, Hironao, additional, Montero-Dorta, Antonio D., additional, More, Surhud, additional, Morganson, Eric, additional, Morice-Atkinson, Xan, additional, Morrison, Heather L., additional, Mosser, Benôit, additional, Muna, Demitri, additional, Myers, Adam D., additional, Nandra, Kirpal, additional, Newman, Jeffrey A., additional, Neyrinck, Mark, additional, Nguyen, Duy Cuong, additional, Nichol, Robert C., additional, Nidever, David L., additional, Noterdaeme, Pasquier, additional, Nuza, Sebastián E., additional, O’Connell, Julia E., additional, O’Connell, Robert W., additional, O’Connell, Ross, additional, Ogando, Ricardo L. C., additional, Olmstead, Matthew D., additional, Oravetz, Audrey E., additional, Oravetz, Daniel J., additional, Osumi, Keisuke, additional, Owen, Russell, additional, Padgett, Deborah L., additional, Padmanabhan, Nikhil, additional, Paegert, Martin, additional, Palanque-Delabrouille, Nathalie, additional, Pan, Kaike, additional, Parejko, John K., additional, Pâris, Isabelle, additional, Park, Changbom, additional, Pattarakijwanich, Petchara, additional, Pellejero-Ibanez, M., additional, Pepper, Joshua, additional, Percival, Will J., additional, Pérez-Fournon, Ismael, additional, Pe´rez-Ra`fols, Ignasi, additional, Petitjean, Patrick, additional, Pieri, Matthew M., additional, Pinsonneault, Marc H., additional, Mello, Gustavo F. Porto de, additional, Prada, Francisco, additional, Prakash, Abhishek, additional, Price-Whelan, Adrian M., additional, Protopapas, Pavlos, additional, Raddick, M. Jordan, additional, Rahman, Mubdi, additional, Reid, Beth A., additional, Rich, James, additional, Rix, Hans-Walter, additional, Robin, Annie C., additional, Rockosi, Constance M., additional, Rodrigues, Thaíse S., additional, Rodríguez-Torres, Sergio, additional, Roe, Natalie A., additional, Ross, Ashley J., additional, Ross, Nicholas P., additional, Rossi, Graziano, additional, Ruan, John J., additional, Rubiño-Martín, J. A., additional, Rykoff, Eli S., additional, Salazar-Albornoz, Salvador, additional, Salvato, Mara, additional, Samushia, Lado, additional, Sánchez, Ariel G., additional, Santiago, Basílio, additional, Sayres, Conor, additional, Schiavon, Ricardo P., additional, Schlegel, David J., additional, Schmidt, Sarah J., additional, Schneider, Donald P., additional, Schultheis, Mathias, additional, Schwope, Axel D., additional, Scóccola, C. G., additional, Scott, Caroline, additional, Sellgren, Kris, additional, Seo, Hee-Jong, additional, Serenelli, Aldo, additional, Shane, Neville, additional, Shen, Yue, additional, Shetrone, Matthew, additional, Shu, Yiping, additional, Aguirre, V. Silva, additional, Sivarani, Thirupathi, additional, Skrutskie, M. F., additional, Slosar, Anže, additional, Smith, Verne V., additional, Sobreira, Flávia, additional, Souto, Diogo, additional, Stassun, Keivan G., additional, Steinmetz, Matthias, additional, Stello, Dennis, additional, Strauss, Michael A., additional, Streblyanska, Alina, additional, Suzuki, Nao, additional, Swanson, Molly E. C., additional, Tan, Jonathan C., additional, Tayar, Jamie, additional, Terrien, Ryan C., additional, Thakar, Aniruddha R., additional, Thomas, Daniel, additional, Thomas, Neil, additional, Thompson, Benjamin A., additional, Tinker, Jeremy L., additional, Tojeiro, Rita, additional, Troup, Nicholas W., additional, Vargas-Magaña, Mariana, additional, Vazquez, Jose A., additional, Verde, Licia, additional, Viel, Matteo, additional, Vogt, Nicole P., additional, Wake, David A., additional, Wang, Ji, additional, Weaver, Benjamin A., additional, Weinberg, David H., additional, Weiner, Benjamin J., additional, White, Martin, additional, Wilson, John C., additional, Wisniewski, John P., additional, Wood-Vasey, W. M., additional, Ye`che, Christophe, additional, York, Donald G., additional, Zakamska, Nadia L., additional, Zamora, O., additional, Zasowski, Gail, additional, Zehavi, Idit, additional, Zhao, Gong-Bo, additional, Zheng, Zheng, additional, Zhou (周旭), Xu, additional, Zhou (周志民), Zhimin, additional, Zou (邹虎), Hu, additional, and Zhu, Guangtun, additional

Published
2015
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23. OBSCURATION-DEPENDENT EVOLUTION OF ACTIVE GALACTIC NUCLEI

Author

Buchner, Johannes, primary, Georgakakis, Antonis, additional, Nandra, Kirpal, additional, Brightman, Murray, additional, Menzel, Marie-Luise, additional, Liu, Zhu, additional, Hsu, Li-Ting, additional, Salvato, Mara, additional, Rangel, Cyprian, additional, Aird, James, additional, Merloni, Andrea, additional, and Ross, Nicholas, additional

Published
2015
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24. OBSCURATION-DEPENDENT EVOLUTION OF ACTIVE GALACTIC NUCLEI

Author

Nicholas P. Ross, M. L. Menzel, Zhu Liu, Andrea Merloni, Murray Brightman, James Aird, Cyprian Rangel, Kirpal Nandra, Li-Ting Hsu, Johannes Buchner, Mara Salvato, and Antonis Georgakakis

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Supermassive black hole, education.field_of_study, Number density, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Astronomy and Astrophysics, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Astrophysics - High Energy Astrophysical Phenomena, education, Astrophysics::Galaxy Astrophysics, Photometric redshift
Abstract

We aim to constrain the evolution of AGN as a function of obscuration using an X-ray selected sample of $\sim2000$ AGN from a multi-tiered survey including the CDFS, AEGIS-XD, COSMOS and XMM-XXL fields. The spectra of individual X-ray sources are analysed using a Bayesian methodology with a physically realistic model to infer the posterior distribution of the hydrogen column density and intrinsic X-ray luminosity. We develop a novel non-parametric method which allows us to robustly infer the distribution of the AGN population in X-ray luminosity, redshift and obscuring column density, relying only on minimal smoothness assumptions. Our analysis properly incorporates uncertainties from low count spectra, photometric redshift measurements, association incompleteness and the limited sample size. We find that obscured AGN with $N_{H}>{\rm 10^{22}\, cm^{-2}}$ account for ${77}^{+4}_{-5}\%$ of the number density and luminosity density of the accretion SMBH population with $L_{\rm X}>10^{43}\text{ erg/s}$, averaged over cosmic time. Compton-thick AGN account for approximately half the number and luminosity density of the obscured population, and ${38}^{+8}_{-7}\%$ of the total. We also find evidence that the evolution is obscuration-dependent, with the strongest evolution around $N_{H}\thickapprox10^{23}\text{ cm}^{-2}$. We highlight this by measuring the obscured fraction in Compton-thin AGN, which increases towards $z\sim3$, where it is $25\%$ higher than the local value. In contrast the fraction of Compton-thick AGN is consistent with being constant at $\approx35\%$, independent of redshift and accretion luminosity. We discuss our findings in the context of existing models and conclude that the observed evolution is to first order a side-effect of anti-hierarchical growth., Published in ApJ

Published
2015
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25. CANDELS/GOODS-S, CDFS, AND ECDFS: PHOTOMETRIC REDSHIFTS FOR NORMAL AND X-RAY-DETECTED GALAXIES

Author

Hsu, Li-Ting, primary, Salvato, Mara, additional, Nandra, Kirpal, additional, Brusa, Marcella, additional, Bender, Ralf, additional, Buchner, Johannes, additional, Donley, Jennifer L., additional, Kocevski, Dale D., additional, Guo, Yicheng, additional, Hathi, Nimish P., additional, Rangel, Cyprian, additional, Willner, S. P., additional, Brightman, Murray, additional, Georgakakis, Antonis, additional, Budavári, Tamás, additional, Szalay, Alexander S., additional, Ashby, Matthew L. N., additional, Barro, Guillermo, additional, Dahlen, Tomas, additional, Faber, Sandra M., additional, Ferguson, Henry C., additional, Galametz, Audrey, additional, Grazian, Andrea, additional, Grogin, Norman A., additional, Huang, Kuang-Han, additional, Koekemoer, Anton M., additional, Lucas, Ray A., additional, McGrath, Elizabeth, additional, Mobasher, Bahram, additional, Peth, Michael, additional, Rosario, David J., additional, and Trump, Jonathan R., additional

Published
2014
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26. CANDELS: CONSTRAINING THE AGN-MERGER CONNECTION WITH HOST MORPHOLOGIES ATz∼ 2

Author

Kocevski, Dale D., primary, Faber, S. M., additional, Mozena, Mark, additional, Koekemoer, Anton M., additional, Nandra, Kirpal, additional, Rangel, Cyprian, additional, Laird, Elise S., additional, Brusa, Marcella, additional, Wuyts, Stijn, additional, Trump, Jonathan R., additional, Koo, David C., additional, Somerville, Rachel S., additional, Bell, Eric F., additional, Lotz, Jennifer M., additional, Alexander, David M., additional, Bournaud, Frederic, additional, Conselice, Christopher J., additional, Dahlen, Tomas, additional, Dekel, Avishai, additional, Donley, Jennifer L., additional, Dunlop, James S., additional, Finoguenov, Alexis, additional, Georgakakis, Antonis, additional, Giavalisco, Mauro, additional, Guo, Yicheng, additional, Grogin, Norman A., additional, Hathi, Nimish P., additional, Juneau, Stéphanie, additional, Kartaltepe, Jeyhan S., additional, Lucas, Ray A., additional, McGrath, Elizabeth J., additional, McIntosh, Daniel H., additional, Mobasher, Bahram, additional, Robaina, Aday R., additional, Rosario, David, additional, Straughn, Amber N., additional, van der Wel, Arjen, additional, and Villforth, Carolin, additional

Published
2011
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27. AEGIS: DEMOGRAPHICS OF X-RAY AND OPTICALLY SELECTED ACTIVE GALACTIC NUCLEI

Author

Yan, Renbin, primary, Ho, Luis C., additional, Newman, Jeffrey A., additional, Coil, Alison L., additional, Willmer, Christopher N. A., additional, Laird, Elise S., additional, Georgakakis, Antonis, additional, Aird, James, additional, Barmby, Pauline, additional, Bundy, Kevin, additional, Cooper, Michael C., additional, Davis, Marc, additional, Faber, S. M., additional, Fang, Taotao, additional, Griffith, Roger L., additional, Koekemoer, Anton M., additional, Koo, David C., additional, Nandra, Kirpal, additional, Park, Shinae Q., additional, Sarajedini, Vicki L., additional, Weiner, Benjamin J., additional, and Willner, S. P., additional

Published
2011
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28. AEGIS: A MULTIWAVELENGTH STUDY OFSPITZERPOWER-LAW GALAXIES

Author

Park, S. Q., primary, Barmby, P., additional, Willner, S. P., additional, Ashby, M. L. N., additional, Fazio, G. G., additional, Georgakakis, A., additional, Ivison, R. J., additional, Konidaris, N. P., additional, Miyazaki, S., additional, Nandra, K., additional, and Rosario, D. J., additional

Published
2010
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29. AEGIS: DEMOGRAPHICS OF X-RAY AND OPTICALLY SELECTED ACTIVE GALACTIC NUCLEI

Author

Kevin Bundy, S. M. Faber, Anton M. Koekemoer, Luis C. Ho, Taotao Fang, Jeffrey A. Newman, S. Q. Park, Christopher N. A. Willmer, Benjamin J. Weiner, Roger L. Griffith, Antonis Georgakakis, S. P. Willner, Alison L. Coil, Vicki L. Sarajedini, Renbin Yan, Kirpal Nandra, Pauline Barmby, Marc Davis, David C. Koo, James Aird, Michael C. Cooper, and Elise S. Laird

Subjects
Physics, Sample selection, Diagnostic methods, Demographics, Astrophysics::High Energy Astrophysical Phenomena, X-ray, Doubly ionized oxygen, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Redshift, Density distribution, Space and Planetary Science, 0103 physical sciences, 010306 general physics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We develop a new diagnostic method to classify galaxies into AGN hosts, star-forming galaxies, and absorption-dominated galaxies by combining the [O III]/Hbeta ratio with rest-frame U-B color. This can be used to robustly select AGNs in galaxy samples at intermediate redshifts (z 10^44 erg/s in our sample are not detected in our 200 ks Chandra images, most likely due to moderate or heavy absorption by gas near the AGN. The 2--7 keV detection rate of Seyfert 2s at z~0.6 suggests that their column density distribution and Compton-thick fraction are similar to that of local Seyferts. Multiple sample selection techniques are needed to obtain as complete a sample as possible.

Published
2011
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30. AEGIS: THE CLUSTERING OF X-RAY ACTIVE GALACTIC NUCLEUS RELATIVE TO GALAXIES ATz∼ 1

Author

Coil, Alison L., primary, Georgakakis, Antonis, additional, Newman, Jeffrey A., additional, Cooper, Michael C., additional, Croton, Darren, additional, Davis, Marc, additional, Koo, David C., additional, Laird, Elise S., additional, Nandra, Kirpal, additional, Weiner, Benjamin J., additional, Willmer, Christopher N. A., additional, and Yan, Renbin, additional

Published
2009
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31. AEGIS-X: THE CHANDRA DEEP SURVEY OF THE EXTENDED GROTH STRIP

Author

Laird, E. S., primary, Nandra, K., additional, Georgakakis, A., additional, Aird, J. A., additional, Barmby, P., additional, Conselice, C. J., additional, Coil, A. L., additional, Davis, M., additional, Faber, S. M., additional, Fazio, G. G., additional, Guhathakurta, P., additional, Koo, D. C., additional, Sarajedini, V., additional, and Willmer, C. N. A., additional

Published
2008
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32. AEGIS: New Evidence Linking Active Galactic Nuclei to the Quenching of Star Formation

Author

Bundy, Kevin, primary, Georgakakis, Antonis, additional, Nandra, Kirpal, additional, Ellis, Richard S., additional, Conselice, Christopher J., additional, Laird, Elise, additional, Coil, Alison, additional, Cooper, Michael C., additional, Faber, Sandra M., additional, Newman, Jeff A., additional, Pierce, Christy M., additional, Primack, Joel R., additional, and Yan, Renbin, additional

Published
2008
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34. AEGIS: Radio and Mid‐Infrared Selection of Obscured AGN Candidates

Author

Park, S. Q., primary, Barmby, P., additional, Fazio, G. G., additional, Nandra, K., additional, Laird, E. S., additional, Georgakakis, A., additional, Rosario, D., additional, Willner, S. P., additional, Rieke, G. H., additional, Ashby, M. L. N., additional, Ivison, R. J., additional, Coil, A. L., additional, and Miyazaki, S., additional

Published
2008
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35. The Environment on a Few Mpc Scales of Infrared Luminous Galaxies at Redshiftz∼1

Author

Marcillac, D., primary, Rieke, G. H., additional, Papovich, C., additional, Willmer, C. N. A., additional, Weiner, B. J., additional, Coil, A. L., additional, Cooper, M. C., additional, Gerke, B. F., additional, Woo, J., additional, Newman, J. A., additional, Georgakakis, A., additional, Laird, E. S., additional, Nandra, K., additional, Fazio, G. G., additional, Huang, J.‐S., additional, and Koo, D. C., additional

Published
2008
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36. The All-Wavelength Extended Groth Strip International Survey (AEGIS) Data Sets

Author

Davis, M., primary, Guhathakurta, P., additional, Konidaris, N. P., additional, Newman, J. A., additional, Ashby, M. L. N., additional, Biggs, A. D., additional, Barmby, P., additional, Bundy, K., additional, Chapman, S. C., additional, Coil, A. L., additional, Conselice, C. J., additional, Cooper, M. C., additional, Croton, D. J., additional, Eisenhardt, P. R. M., additional, Ellis, R. S., additional, Faber, S. M., additional, Fang, T., additional, Fazio, G. G., additional, Georgakakis, A., additional, Gerke, B. F., additional, Goss, W. M., additional, Gwyn, S., additional, Harker, J., additional, Hopkins, A. M., additional, Huang, J.-S., additional, Ivison, R. J., additional, Kassin, S. A., additional, Kirby, E. N., additional, Koekemoer, A. M., additional, Koo, D. C., additional, Laird, E. S., additional, Le Floc'h, E., additional, Lin, L., additional, Lotz, J. M., additional, Marshall, P. J., additional, Martin, D. C., additional, Metevier, A. J., additional, Moustakas, L. A., additional, Nandra, K., additional, Noeske, K. G., additional, Papovich, C., additional, Phillips, A. C., additional, Rich, R. M., additional, Rieke, G. H., additional, Rigopoulou, D., additional, Salim, S., additional, Schiminovich, D., additional, Simard, L., additional, Smail, I., additional, Small, T. A., additional, Weiner, B. J., additional, Willmer, C. N. A., additional, Willner, S. P., additional, Wilson, G., additional, Wright, E. L., additional, and Yan, R., additional

Published
2007
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38. AEGIS: The Environment of X-Ray Sources at z ≈ 1

Author

Georgakakis, A., primary, Nandra, K., additional, Laird, E. S., additional, Cooper, M. C., additional, Gerke, B. F., additional, Newman, J. A., additional, Croton, D. J., additional, Davis, M., additional, Faber, S. M., additional, and Coil, A. L., additional

Published
2007
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39. AEGIS: The Diversity of Bright Near-IR-selected Distant Red Galaxies

Author

Conselice, C. J., primary, Newman, J. A., additional, Georgakakis, A., additional, Almaini, O., additional, Coil, A. L., additional, Cooper, M. C., additional, Eisenhardt, P., additional, Foucaud, S., additional, Koekemoer, A., additional, Lotz, J., additional, Noeske, K., additional, Weiner, B., additional, and Willmer, C. N. A, additional

Published
2007
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40. AEGIS: Host Galaxy Morphologies of X-Ray-selected and Infrared-selected Active Galactic Nuclei at 0.2 ≤ z < 1.2

Author

Pierce, C. M., primary, Lotz, J. M., additional, Laird, E. S., additional, Lin, L., additional, Nandra, K., additional, Primack, J. R., additional, Faber, S. M., additional, Barmby, P., additional, Park, S. Q., additional, Willner, S. P., additional, Gwyn, S., additional, Koo, D. C., additional, Coil, A. L., additional, Cooper, M. C., additional, Georgakakis, A., additional, Koekemoer, A. M., additional, Noeske, K. G., additional, Weiner, B. J., additional, and Willmer, C. N. A., additional

Published
2007
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41. Mid‐Infrared Properties of X‐Ray Sources in the Extended Groth Strip

Author

Barmby, P., primary, Alonso‐Herrero, A., additional, Donley, J. L., additional, Egami, E., additional, Fazio, G. G., additional, Georgakakis, A., additional, Huang, J.‐S., additional, Laird, E. S., additional, Miyazaki, S., additional, Nandra, K., additional, Park, S. Q., additional, Perez‐Gonzalez, P. G., additional, Rieke, G. H., additional, Rigby, J. R., additional, and Willner, S. P., additional

Published
2006
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50. CANDELS: Elevated black hole growth in the progenitors of compact quiescent galaxies at z ∼ 2

Author

Kocevski, Dale D., Barro, Guillermo, Faber, S.M., Dekel, Avishai, Somerville, Rachel S., Young, Joshua A., Williams, Christina C., McIntosh, Daniel H., Georgakakis, Antonis, Hasinger, Guenther, Nandra, Kirpal, Civano, Francesca, Alexander, David M., Almaini, Omar, Conselice, Christopher J., Donley, Jennifer L., Ferguson, Harry C., Giavalisco, Mauro, Grogin, Norman A., Hathi, Nimish, Hawkins, Matthew, Koekemoer, Anton M., Koo, David C., McGrath, Elizabeth J., Mobasher, Bahram, Pérez González, Pablo G., Pforr, Janine, Primack, Joel R., Santini, Paola, Stefanon, Mauro, Trump, Jonathan R., van der Wel, Arjen, Wuyts, Stijn, Yan, Haojing, Kocevski, Dale D., Barro, Guillermo, Faber, S.M., Dekel, Avishai, Somerville, Rachel S., Young, Joshua A., Williams, Christina C., McIntosh, Daniel H., Georgakakis, Antonis, Hasinger, Guenther, Nandra, Kirpal, Civano, Francesca, Alexander, David M., Almaini, Omar, Conselice, Christopher J., Donley, Jennifer L., Ferguson, Harry C., Giavalisco, Mauro, Grogin, Norman A., Hathi, Nimish, Hawkins, Matthew, Koekemoer, Anton M., Koo, David C., McGrath, Elizabeth J., Mobasher, Bahram, Pérez González, Pablo G., Pforr, Janine, Primack, Joel R., Santini, Paola, Stefanon, Mauro, Trump, Jonathan R., van der Wel, Arjen, Wuyts, Stijn, and Yan, Haojing

Abstract

We examine the fraction of massive (M* > 1010 M) compact star-forming galaxies (cSFGs) that host an active galactic nucleus (AGN) at z ~ 2. These cSFGs are likely the direct progenitors of the compact quiescent galaxies observed at this epoch, which are the first population of passive galaxies to appear in large numbers in the early Universe. We identify cSFGs that host an AGN using a combination of Hubble WFC3 imaging and Chandra X-ray observations in four fields: the Chandra Deep Fields, the Extended Groth Strip, and the UKIDSS Ultra Deep Survey field. We find that - 39.2+ % 3.6 3.9 (65/166) of cSFGs at 1.4 < z < 3.0 host an X-ray detected AGN. This fraction is 3.2 times higher than the incidence of AGN in extended star-forming galaxies with similar masses at these redshifts. This difference is significant at the 6.2s level. Our results are consistent with models in which cSFGs are formed through a dissipative contraction that triggers a compact starburst and concurrent growth of the central black hole. We also discuss our findings in the context of cosmological galaxy evolution simulations that require feedback energy to rapidly quench cSFGs. We show that the AGN fraction peaks precisely where energy injection is needed to reproduce the decline in the number density of cSFGs with redshift. Our results suggest that the first abundant population of massive quenched galaxies emerged directly following a phase of elevated supermassive black hole growth and further hints at a possible connection between AGN and the rapid quenching of star formation in these galaxies.

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