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CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
Finkelstein, Steven L.; Bell, Eric F.; Castellano, Marco +104 more
The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is designed to document the first third of galactic evolution, over the approximate redshift (z) range 8-1.5. It will image >250,000 distant galaxies using three separate cameras on the Hubble Space Telescope, from the mid-ultraviolet to the near-infrared, and will fin…
CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey—The Hubble Space Telescope Observations, Imaging Data Products, and Mosaics
Finkelstein, Steven L.; Bell, Eric F.; Castellano, Marco +121 more
This paper describes the Hubble Space Telescope imaging data products and data reduction procedures for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS). This survey is designed to document the evolution of galaxies and black holes at z ≈ 1.5-8, and to study Type Ia supernovae at z > 1.5. Five premier multi-wavelengt…
A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
Ferguson, Henry C.; Casertano, Stefano; Filippenko, Alexei V. +6 more
We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to determine the Hubble constant from optical and infrared observations of over 600 Cepheid variables in the host galaxies of eight recent Type Ia supernovae (SNe Ia), providing the calibration for a magnitude-redshift relation based on 253 SNe Ia. Increased precision over p…
Cosmological Parameters from Observations of Galaxy Clusters
Allen, Steven W.; Evrard, August E.; Mantz, Adam B.
Studies of galaxy clusters have proved crucial in helping to establish the standard model of cosmology, with a Universe dominated by dark matter and dark energy. A theoretical basis that describes clusters as massive, multicomponent, quasi-equilibrium systems is growing in its capability to interpret multiwavelength observations of expanding scope…
GOODS-Herschel: an infrared main sequence for star-forming galaxies
Magnelli, B.; Lutz, D.; Altieri, B. +52 more
We present the deepest 100 to 500 µm far-infrared observations obtained with the Herschel Space Observatory as part of the GOODS-Herschel key program, and examine the infrared (IR) 3-500 µm spectral energy distributions (SEDs) of galaxies at 0 < z < 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, and AKARI …
Supernova Constraints and Systematic Uncertainties from the First Three Years of the Supernova Legacy Survey
Sullivan, M.; Lidman, C.; González-Gaitán, S. +33 more
We combine high-redshift Type Ia supernovae from the first three years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality joint sample of 472 SNe (123 low-z, 93 SDSS, 242 SNLS, and 14 Hubble Space Telescope). SN data alone require cosmic acceleration at >99.999% confiden…
The Lesser Role of Starbursts in Star Formation at z = 2
Berta, S.; Magnelli, B.; Nordon, R. +31 more
Two main modes of star formation are know to control the growth of galaxies: a relatively steady one in disk-like galaxies, defining a tight star formation rate (SFR)-stellar mass sequence, and a starburst mode in outliers to such a sequence which is generally interpreted as driven by merging. Such starburst galaxies are rare but have much higher …
The Chemical Composition of Comets—Emerging Taxonomies and Natal Heritage
Mumma, Michael J.; Charnley, Steven B.
Cometary nuclei contain the least modified material from the formative epoch of our planetary system, and their compositions reflect a range of processes experienced by material prior to its incorporation in the cometary nucleus. Dynamical models suggest that icy bodies in the main cometary reservoirs (Kuiper Belt, Oort Cloud) formed in a range of…
Calibrating Extinction-free Star Formation Rate Diagnostics with 33 GHz Free-free Emission in NGC 6946
Helou, G.; Roussel, H.; Murphy, E. J. +20 more
Using free-free emission measured in the Ka band (26-40 GHz) for 10 star-forming regions in the nearby galaxy NGC 6946, including its starbursting nucleus, we compare a number of star formation rate (SFR) diagnostics that are typically considered to be unaffected by interstellar extinction. These diagnostics include non-thermal radio (i.e., 1.4 GH…
Extragalactic background light inferred from AEGIS galaxy-SED-type fractions
Barmby, P.; Cooper, M. C.; Huang, J. -S. +15 more
The extragalactic background light (EBL) is of fundamental importance both for understanding the entire process of galaxy evolution and for γ-ray astronomy, but the overall spectrum of the EBL between 0.1 and 1000 µm has never been determined directly from galaxy spectral energy distribution (SED) observations over a wide redshift range. The…