Ryan Quadri

The NEWFIRM Medium-Band Survey: Filter Definitions and First Results (2009)

Van Dokkum, Pieter G., Labbe, Ivo, Marchesini, Danilo, Quadri, Ryan, Brammer, Gabriel, Whitaker, Katherine E., ...

Deep near-infrared imaging surveys allow us to select and study distant galaxies in the rest-frame optical, and have transformed our understanding of the early Universe. As the vast majority of K- or...

The Multiwavelength Survey by Yale-Chile (MUSYC): Wide K-band Imaging, Photometric Catalogs, Clustering and Physical Properties of Galaxies at z~2 (2008)

Blanc, Guillermo A., Lira, Paulina, Barrientos, L. Felipe, Aguirre, Paula, Francke, Harold, Taylor, Edward N., ...

We present K-band imaging of two ~30'x30' fields covered by the MUSYC Wide NIR Survey. The 1030 and 1255 fields were imaged with ISPI on the 4m Blanco telescope at CTIO to a 5 sigma point-source...

Confirmation of the remarkable compactness of massive quiescent galaxies at z~2.3: early-type galaxies did not form in a simple monolithic collapse (2008)

Van Dokkum, Pieter, Franx, Marijn, Kriek, Mariska, Holden, Bradford, Illingworth, Garth, Magee, Daniel, ...

Using deep near-infrared spectroscopy Kriek et al. (2006) found that ~45% of massive galaxies at z~2.3 have evolved stellar populations and little or no ongoing star formation. Here we determine the...

A Near-Infrared Spectroscopic Survey of K-selected Galaxies at z~2.3: Redshifts and Implications for Broadband Photometric Studies (2008)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Illingworth, Garth D., Marchesini, Danilo, Quadri, Ryan, ...

Using the Gemini Near-InfraRed Spectrograph (GNIRS), we have completed a near-infrared spectroscopic survey for K-bright galaxies at z~2.3, selected from the MUSYC survey. We derived spectroscopic...

A near-infrared spectroscopic survey of K-selected galaxies at z 2.3: redshifts and implications for broadband photometric studies (2008)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Illingworth, Garth D., Marchesini, Danilo, Quadri, Ryan, ...

Clustering of Intermediate Luminosity X-ray selected AGN at z~3 (2007)

Francke, Harold, Gawiser, Eric, Lira, Paulina, Treister, Ezequiel, Virani, Shanil, Cardamone, Carie, ...

We present the first clustering results of X-ray selected AGN at z~3. Using Chandra X-ray imaging and UVR optical colors from MUSYC photometry in the ECDF-S field, we selected a sample of 58 z~3 AGN...

Ly Alpha-Emitting Galaxies at z=3.1: L* Progenitors Experiencing Rapid Star Formation (2007)

Gawiser, Eric, Francke, Harold, Lai, Kamson, Schawinski, Kevin, Gronwall, Caryl, Ciardullo, Robin, ...

We studied the clustering properties and multiwavelength spectral energy distributions of a complete sample of 162 Ly Alpha-Emitting (LAE) galaxies at z=3.1 discovered in deep narrow-band MUSYC...

Galaxy Evolution and Environment (2007)

Van Dokkum, Pieter, Quadri, Ryan

The properties of galaxies are strongly correlated with their environment, with red galaxies dominating galaxy clusters and blue galaxies dominating the general field. However, not all field galaxies...

The origin of line emission in massive z 2.3 galaxies: evidence for cosmic downsizing of AGN host galaxies (2007)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Illingworth, Garth D., Coppi, Paolo, Förster Schreiber, Natascha M., ...

The multiwavelength survey by Yale-Chile (Musyc): Deep near-infrared imaging and the selection of distant galaxies (2007)

Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...

Publicación ISI

The multiwavelength survey by Yale-Chile (Musyc): Deep near-infrared imaging and the selection of distant galaxies (2007)

Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...

Publicación ISI

The Multiwavelength Survey by Yale-Chile (MUSYC): Deep Near-Infrared Imaging and the Selection of Distant Galaxies (2006)

Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...

We present deep near-infrared JHK imaging of four 10'x10' fields. The observations were carried out as part of the Multiwavelength Survey by Yale-Chile (MUSYC) with ISPI on the CTIO 4m telescope. The...

The Origin of Line Emission in Massive z~2.3 Galaxies: Evidence for Cosmic Downsizing of AGN Host Galaxies (2006)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Illingworth, Garth D., Coppi, Paolo, Schreiber, Natascha M. Forster, ...

Using the Gemini Near-InfraRed Spectrograph (GNIRS), we have assembled a complete sample of 20 K-selected galaxies at 2.0

The rest-frame optical luminosity functions of galaxies at 2 (2006)

Marchesini, Danilo, Van Dokkum, Pieter, Quadri, Ryan, Rudnick, Gregory, Franx, Marijn, Lira, Paulina, ...

We present the rest-frame optical (B, V, and R band) luminosity functions (LFs) of galaxies at 2

Spectroscopic identification of massive galaxies at z similar to 2.3 with strongly suppressed star formation (2006)

Kriek, Mariska, Dokkum, Pieter G. Van, Franx, Marijn, Quadri, Ryan, Gawiser, Eric, Herrera, David, ...

We present first results of a spectroscopic survey targeting K-selected galaxies at using the Gemini z = 2.0 - 2.7 near-infrared spectrograph (GNIRS). We obtained near-infrared spectra with a...

Spectroscopic Identification of Massive Galaxies at z~2.3 with Strongly Suppressed Star Formation (2006)

Kriek, Mariska, Van Dokkum, Pieter, Franx, Marijn, Quadri, Ryan, Gawiser, Eric, Herrera, David, ...

We present first results of a spectroscopic survey targeting K-selected galaxies at z=2.0-2.7 using the GNIRS instrument on Gemini-South. We obtained near-infrared spectra with a wavelength coverage...

Clustering of K-selected Galaxies at 2 (2006)

Quadri, Ryan, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Marchesini, Danilo, Lira, Paulina, ...

We study the clustering properties of K-selected galaxies at 2

The physical nature of Ly alpha-emitting galaxies at z=3.1 (2006)

Gawiser, Eric, Dokkum, Pieter G. Van, Gronwall, Caryl, Ciardullo, Robin, Blanc, Guillermo A., Castander, Francisco J., ...

We selected 40 candidate Ly alpha-emitting galaxies ( LAEs) at z similar or equal to 3.1 with observed-frame equivalent widths greater than 150 and inferred emission-line fluxes above 2.5 x 10(-17)...

The Physical Nature of Lyman Alpha Emitting Galaxies at z=3.1 (2006)

Gawiser, Eric, Van Dokkum, Pieter G., Gronwall, Caryl, Ciardullo, Robin, Blanc, Guillermo A., Castander, Francisco J., ...

We selected 40 candidate Lyman Alpha Emitting galaxies (LAEs) at z ~=3.1 with observed frame equivalent widths >150A and inferred emission line fluxes >2.5x10^-17 ergs/cm^2/s from deep narrow-band...

Direct Measurements of the Stellar Continua and Balmer/4000 Angstrom Breaks of Red z>2 Galaxies: Redshifts and Improved Constraints on Stellar Populations (2006)

Kriek, Mariska, Van Dokkum, Pieter, Franx, Marijn, Schreiber, Natascha Forster, Gawiser, Eric, Illingworth, Garth, ...

We use near-infrared (NIR) spectroscopy obtained with GNIRS on Gemini, NIRSPEC on KECK, and ISAAC on the VLT to study the rest-frame optical continua of three `Distant Red Galaxies' (having Js - Ks >...

Star formation in distant red galaxies: Spitzer observations in the Hubble Deep Field-South (2006)

Webb, Tracy M. A., Dokkum, Pieter Van, Egami, Eiichi, Fazio, Giovanni, Franx, Marijn, Gawiser, Eric, ...

We present Spitzer 24 mu m imaging of 1.5 < z < 2.5 distant red galaxies (DRGs) in the 10' x 10' extended Hubble Deep Field-South of the Multiwavelength Survey by Yale-Chile. We detect 65% of the...

The multiwavelength survey by Yale-Chile (MUSYC): Survey design and deep public UBVRIZ ' images and catalogs of the extended Hubble Deep Field-South (2006)

Gawiser, Eric, Dokkum, Pieter G. Van, Herrera, David, Maza, José, Castander, Francisco J., Infante, Leopoldo, ...

We present UBVRIz' optical images taken with MOSAIC on the CTIO 4 m telescope of the 0.32 deg(2) Extended Hubble Deep Field-South. This is one of four fields comprising the MUSYC survey, which is...

Direct measurements of the stellar continua and balmer/4000 Å breaks of red z > 2 galaxies: redshifts and improved constraints on stellar populations (2006)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Förster Schreiber, Natascha M., Gawiser, Eric, Illingworth, Garth D., ...

Spectroscopic identification of massive galaxies at z ~ 2.3 with strongly suppressed star formation (2006)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Quadri, Ryan, Gawiser, Eric, Herrera, David, ...

We present first results of a spectroscopic survey targeting K-selected galaxies at z=2.0-2.7 using the Gemini near-infrared spectrograph (GNIRS). We obtained near-infrared spectra with a wavelength...

Direct measurements of the stellar continua and Balmer/4000 Å breaks of Red z > 2 Galaxies: Redshifts and improved constraints on stellar populations1 (2006)

Kriek, Mariska, Van Dokkum, Pieter G., Franx, Marijn, Förster Schreiber, Natascha M., Gawiser, Eric, Illingworth, Garth D., ...

We use near-infrared (NIR) spectroscopy obtained with the GNIRS on Gemini, NIRSPEC on the Keck, and ISAAC on the VLT to study the rest-frame optical continua of three ``distant red galaxies'' (with...

Star Formation in Distant Red Galaxies: Spitzer observations in the Hubble Deep Field South (2005)

Webb, Tracy, Van Dokkum, Pieter, Egami, Eiichi, Fazio, Giovanni, Franx, Marijn, Gawiser, Eric, ...

We present Spitzer 24micron imaging of 1.5 < z < 2.5 Distant Red Galaxies (DRGs) in the 10arcmin by 10arcmin Extended Hubble Deep Field South of the Multiwavelength Survey by Yale-Chile. We detect...