Mariska Kriek

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The existence of massive galaxies with strongly suppressed star formation at z ∼ 2.3, identified in a previous paper, suggests that a red sequence may already be in place beyond z = 2. In order to test this hypothesis, we study the rest-frame U − B color distribution of massive galaxies at 2 < z < 3. The sample is drawn from our near-infrared spectroscopic(More)
We present 3D-HST, a near-infrared spectroscopic Treasury program with the Hubble Space Telescope for studying the physical processes that shape galaxies in the distant universe. 3D-HST provides rest-frame optical spectra for a sample of ∼7000 galaxies at 1 < z < 3.5, the epoch when ∼60% of all star formation took place, the number density of quasars(More)
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 redshifts from emission lines or from continuum features and shapes for all 36 observed galaxies. The continuum redshifts are driven by the Balmer/4000 Å break,(More)
We present deep near-IR (NIR) medium-bandwidth photometry over the wavelength range 1–1.8μm in the Allwavelength Extended Groth strip International Survey (AEGIS) and Cosmic Evolution Survey (COSMOS) fields. The observations were carried out using the NOAO Extremely Wide-Field Infrared Imager (NEWFIRM) on the Mayall 4 m Telescope on Kitt Peak as part of the(More)
We use the optical to mid-infrared coverage of the NEWFIRM Medium-Band Survey (NMBS) to characterize, for the first time, the properties of a mass-complete sample of 14 galaxies at 3.0 z < 4.0 with Mstar > 2.5×1011 M , and to derive significantly more accurate measurements of the high-mass end of the stellar mass function (SMF) of galaxies at 3.0 z < 4.0.(More)
We present the evolution of the volume averaged properties of the rest-frame optically luminous galaxy population to z ∼ 3, determined from four disjoint deep fields with optical to near-infrared wavelength coverage. Our use of independent lines of sight substantially mitigates field-to-field variations. We select galaxies above a fixed rest-frame V -band(More)
We take advantage of the Hubble Ultra Deep Field (UDF) data to study the restframe optical and ultra violet (UV) morphologies of the novel population of Distant Red Galaxies (DRGs). Six galaxies with J −Ks > 2.3 are found to Ks = 21.5, five of which have photometric redshifts zphot & 2, corresponding to a surface density of 0.9 arcmin. The surface(More)
We present our methods for generating a catalogue of 7000 synthetic images and 40 000 integrated spectra of redshift z = 0 galaxies from the Illustris simulation. The mock data products are produced by using stellar population synthesis models to assign spectral energy distributions (SED) to each star particle in the galaxies. The resulting synthetic images(More)
We present HST NIC2 morphologies of a spectroscopic sample of massive galaxies at z ∼ 2.3, by extending our sample of nine compact quiescent galaxies (re ∼ 0.9 kpc) with ten massive emissionline galaxies. The emission-line galaxies are classified by the nature of their ionized emission; there are six star-forming galaxies and four galaxies hosting an active(More)
We present Hα maps at 1 kpc spatial resolution for star-forming galaxies at z∼1, made possible by the Wide Field Camera 3 grism on Hubble Space Telescope (HST). Employing this capability over all five 3D-HST/CANDELS fields provides a sample of 3200 galaxies enabling a division into subsamples based on stellar mass and star formation rate (SFR). By(More)