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CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey—The Hubble Space Telescope Observations, Imaging Data Products, and Mosaics (2011)
Journal Article
Koekemoer, A., Faber, S., Ferguson, H., Grogin, N., Kocevski, D., Koo, D., …et al. (2011). CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey—The Hubble Space Telescope Observations, Imaging Data Products, and Mosaics. Astrophysical Journal Supplement, 197(2), https://doi.org/10.1088/0067-0049/197/2/36

The stellar mass content of submillimeter-selected galaxies (2011)
Journal Article
Hainline, L., Blain, A., Smail, I., Alexander, D., Armus, L., Chapman, S., & Ivison, R. (2011). The stellar mass content of submillimeter-selected galaxies. Astrophysical Journal, 740(2), Article 96. https://doi.org/10.1088/0004-637x/740/2/96

We present a new study of stellar mass in a sample of ~70 submillimeter-selected galaxies (SMGs) with accurate spectroscopic redshifts. We fit combinations of stellar population synthesis models and power laws to the galaxies' observed-frame optical... Read More about The stellar mass content of submillimeter-selected galaxies.

Revealing a Population of Heavily Obscured Active Galactic Nuclei at z ≈ 0.5-1 in the Chandra Deep Field-South (2011)
Journal Article
Luo, B., Brandt, W., Xue, Y., Alexander, D., Brusa, M., Bauer, F., …Vignali, C. (2011). Revealing a Population of Heavily Obscured Active Galactic Nuclei at z ≈ 0.5-1 in the Chandra Deep Field-South. Astrophysical Journal, 740(1), Article 37. https://doi.org/10.1088/0004-637x/740/1/37

Heavily obscured (N H >~ 3 × 1023 cm-2) active galactic nuclei (AGNs) not detected even in the deepest X-ray surveys are often considered to be comparably numerous to the unobscured and moderately obscured AGNs. Such sources are required to fit the c... Read More about Revealing a Population of Heavily Obscured Active Galactic Nuclei at z ≈ 0.5-1 in the Chandra Deep Field-South.

NICMOS Polarimetry of ''Polar-scattered'' Seyfert 1 Galaxies (2011)
Journal Article
Batcheldor, D., Robinson, A., Axon, D., Young, S., Quinn, S., Smith, J., …Alexander, D. (2011). NICMOS Polarimetry of ''Polar-scattered'' Seyfert 1 Galaxies. Astrophysical Journal, 738(1), Article 90. https://doi.org/10.1088/0004-637x/738/1/90

The nuclei of Seyfert 1 galaxies exhibit a range of optical polarization characteristics that can be understood in terms of two scattering regions producing orthogonal polarizations: an extended polar scattering region (PSR) and a compact equatorial... Read More about NICMOS Polarimetry of ''Polar-scattered'' Seyfert 1 Galaxies.

A New Diagnostic of Active Galactic Nuclei: Revealing Highly Absorbed Systems at Redshift >0.3 (2011)
Journal Article
Juneau, S., Dickinson, M., Alexander, D., & Salim, S. (2011). A New Diagnostic of Active Galactic Nuclei: Revealing Highly Absorbed Systems at Redshift >0.3. Astrophysical Journal, 736(2), Article 104. https://doi.org/10.1088/0004-637x/736/2/104

We introduce the Mass-Excitation (MEx) diagnostic to identify active galactic nuclei (AGNs) in galaxies at intermediate redshift. In the absence of near-infrared spectroscopy, necessary for using traditional nebular line diagrams at z > 0.4, we demon... Read More about A New Diagnostic of Active Galactic Nuclei: Revealing Highly Absorbed Systems at Redshift >0.3.

The LABOCA survey of the Extended Chandra Deep Field-South : a photometric redshift survey of submillimetre galaxies (2011)
Journal Article
Wardlow, J., Smail, I., Coppin, K., Alexander, D., Brandt, W., Danielson, A., …van der Werf, P. (2011). The LABOCA survey of the Extended Chandra Deep Field-South : a photometric redshift survey of submillimetre galaxies. Monthly Notices of the Royal Astronomical Society, 415(2), 1479-1508. https://doi.org/10.1111/j.1365-2966.2011.18795.x

We derive photometric redshifts from 17-band optical to mid-infrared photometry of 78 robust radio, 24-μm and Spitzer IRAC counterparts to 72 of the 126 submillimetre galaxies (SMGs) selected at 870 μm by LABOCA observations in the Extended Chandra D... Read More about The LABOCA survey of the Extended Chandra Deep Field-South : a photometric redshift survey of submillimetre galaxies.

Defining the intrinsic AGN infrared spectral energy distribution and measuring its contribution to the infrared output of composite galaxies (2011)
Journal Article
Mullaney, J., Alexander, D., Goulding, A., & Hickox, R. (2011). Defining the intrinsic AGN infrared spectral energy distribution and measuring its contribution to the infrared output of composite galaxies. Monthly Notices of the Royal Astronomical Society, 414(2), 1082-1110. https://doi.org/10.1111/j.1365-2966.2011.18448.x

We use infrared spectroscopy and photometry to empirically define the intrinsic mid- to far-infrared spectral energy distribution (i.e. 6–100 μm SED) of thermal emission produced by typical (i.e. 2–10 keV luminosity, L2-10 keV∼ 1042–1044 erg s−1) act... Read More about Defining the intrinsic AGN infrared spectral energy distribution and measuring its contribution to the infrared output of composite galaxies.

Clustering of Obscured and Unobscured Quasars in the Boötes Field: Placing Rapidly Growing Black Holes in the Cosmic Web (2011)
Journal Article
Hickox, R., Myers, A., Brodwin, M., Alexander, D., Forman, W., Jones, C., …Mullaney, J. (2011). Clustering of Obscured and Unobscured Quasars in the Boötes Field: Placing Rapidly Growing Black Holes in the Cosmic Web. Astrophysical Journal, 731(2), Article 117. https://doi.org/10.1088/0004-637x/731/2/117

We present the first measurement of the spatial clustering of mid-infrared-selected obscured and unobscured quasars, using a sample in the redshift range 0.7 < z < 1.8 selected from the 9 deg2 Boötes multiwavelength survey. Recently, the Spitzer Spac... Read More about Clustering of Obscured and Unobscured Quasars in the Boötes Field: Placing Rapidly Growing Black Holes in the Cosmic Web.

X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-dominated Active Galactic Nuclei (2011)
Journal Article
Alexander, D., Bauer, F., Brandt, W., Daddi, E., Hickox, R., Lehmer, B., …Vignali, C. (2011). X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-dominated Active Galactic Nuclei. Astrophysical Journal, 738(1), Article 44. https://doi.org/10.1088/0004-637x/738/1/44

We use the 4 Ms Chandra Deep Field-South (CDF-S) survey to place direct constraints on the ubiquity of z 2 heavily obscured active galactic nuclei (AGNs) in K < 22 BzK-selected galaxies. Forty-seven (21%) of the 222 BzK-selected galaxies in the centr... Read More about X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-dominated Active Galactic Nuclei.

CANDELS : constraining the AGN-merger connection with host morphologies at z ~ 2 (2011)
Journal Article
Kocevski, D., Faber, S., Mozena, M., Koekemoer, A., Nandra, K., Rangel, C., …Villforth, C. (2011). CANDELS : constraining the AGN-merger connection with host morphologies at z ~ 2. Astrophysical Journal, 744(2), Article 148. https://doi.org/10.1088/0004-637x/744/2/148

Using Hubble Space Telescope/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey, we examine the role that major galaxy mergers play in triggering active galactic nucleus (AGN) activity at z ~ 2. Our sampl... Read More about CANDELS : constraining the AGN-merger connection with host morphologies at z ~ 2.

Supermassive black hole growth in starburst galaxies over cosmic time : constraints from the deepest Chandra Fields (2011)
Journal Article
Rafferty, D., Brandt, W., Alexander, D., Xue, Y., Bauer, F., Lehmer, B., …Papovich, C. (2011). Supermassive black hole growth in starburst galaxies over cosmic time : constraints from the deepest Chandra Fields. Astrophysical Journal, 742(1), Article 3. https://doi.org/10.1088/0004-637x/742/1/3

We present an analysis of deep multiwavelength data for z ≈ 0.3-3 starburst galaxies selected by their 70 μm emission in the Extended-Chandra Deep Field-South and Extended Groth Strip. We identify active galactic nuclei (AGNs) in these infrared sourc... Read More about Supermassive black hole growth in starburst galaxies over cosmic time : constraints from the deepest Chandra Fields.