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3D-HST: A Wide-field Grism Spectroscopic Survey with the Hubble Space Telescope

Brammer, Gabriel B. and van Dokkum, Pieter G. and Franx, Marijn and Fumagalli, Mattia and Patel, Shannon and Rix, Hans-Walter and Skelton, Rosalind E. and Kriek, Mariska and Nelson, Erica and Schmidt, Kasper B. and Bezanson, Rachel and da Cunha, Elisabete and Erb, Dawn K. and Fan, Xiaohui and Schreiber, Natascha Förster and Illingworth, Garth D. and Labbé, Ivo and Leja, Joel and Lundgren, Britt and Magee, Dan and Marchesini, Danilo and McCarthy, Patrick and Momcheva, Ivelina and Muzzin, Adam and Quadri, Ryan and Steidel, Charles C. and Tal, Tomer and Wake, David and Whitaker, Katherine E. and Williams, Anna (2012) 3D-HST: A Wide-field Grism Spectroscopic Survey with the Hubble Space Telescope. Astrophysical Journal Supplement Series, 200 (2). Art. No. 13. ISSN 0067-0049.

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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 peaked, the first galaxies stopped forming stars, and the structural regularity that we see in galaxies today must have emerged. 3D-HST will cover three quarters (625 arcmin^2) of the CANDELS Treasury survey area with two orbits of primary WFC3/G141 grism coverage and two to four orbits with the ACS/G800L grism in parallel. In the IR, these exposure times yield a continuum signal-to-noise ratio of ∼5 per resolution element at H_140 ∼ 23.1 and a 5σ emission-line sensitivity of ∼5 × 10^(−17) erg s^−1 cm^(−2) for typical objects, improving by a factor of ∼2 for compact sources in images with low sky background levels. The WFC3/G141 spectra provide continuous wavelength coverage from 1.1 to 1.6μm at a spatial resolution of ∼0."13, which, combined with their depth, makes them a unique resource for studying galaxy evolution. We present an overview of the preliminary reduction and analysis of the grism observations, including emission-line and redshift measurements from combined fits to the extracted grism spectra and photometry from ancillary multi-wavelength catalogs. The present analysis yields redshift estimates with a precision of σ(z) = 0.0034(1 + z), or σ(v) ≈ 1000 km s^(−1). We illustrate how the generalized nature of the survey yields near-infrared spectra of remarkable quality for many different types of objects, including a quasar at z = 4.7, quiescent galaxies at z ∼ 2, and the most distant T-type brown dwarf star known. The combination of the CANDELS and 3D-HST surveys will provide the definitive imaging and spectroscopic data set for studies of the 1 < z < 3.5 universe until the launch of the James Webb Space Telescope.

Item Type:Article
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URLURL TypeDescription
Rix, Hans-Walter0000-0003-4996-9069
Kriek, Mariska0000-0002-7613-9872
Nelson, Erica0000-0002-7524-374X
Steidel, Charles C.0000-0002-4834-7260
Additional Information:© 2012 The American Astronomical Society. Received 2011 December 20; accepted for publication 2012 April 16; Published 2012 May 17. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs 12177 and 12328. We are grateful to the authors and maintainers of the aXe software package: Martin Kümmel, Harald Kuntschner, Jeremy Walsh, and Howard Bushouse. This research has made extensive use of NASA’s Astrophysics Data System Bibliographic Services and of open source scientific Python libraries, including PyFITS and PyRAF produced by the Space Telescope Science Institute, which is operated by AURA for NASA. The brown dwarf spectral templates are taken from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at 3D-HST is supported in part by grant HST-GO-12177 awarded by the Space Telescope Science Institute. Additional funding for this research was provided by the Marie Curie Actions of the European Commission (FP7-COFUND) and the European Research Council under the European Community’s Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement 227749.
Funding AgencyGrant Number
Marie Curie FellowshipFP7-COFUND
European Research Council (ERC)FP7/2007-2013
European Research Council (ERC)227749
Subject Keywords:galaxies: high-redshift; surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20120711-142544942
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Official Citation:3D-HST: A Wide-field Grism Spectroscopic Survey with the Hubble Space Telescope Gabriel B. Brammer et al. 2012 ApJS 200 13
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32365
Deposited By: Aucoeur Ngo
Deposited On:11 Jul 2012 22:53
Last Modified:03 Oct 2019 04:00

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