Search Publications
The Brightest of Reionizing Galaxies Survey: Constraints on the Bright End of the z ~ 8 Luminosity Function
Shull, J. M.; Treu, T.; Trenti, M. +6 more
We report the discovery of 33 Lyman-break galaxy candidates at z ~ 8 detected in Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging as part of the Brightest of Reionizing Galaxies (BoRG) pure-parallel survey. The ongoing BoRG survey currently has the largest area (274 arcmin2) with Y 098 (or Y 105), J 1…
GOODS-Herschel: Impact of Active Galactic Nuclei and Star Formation Activity on Infrared Spectral Energy Distributions at High Redshift
Dickinson, Mark; Kirkpatrick, Allison; Valtchanov, Ivan +25 more
We explore the effects of active galactic nuclei (AGNs) and star formation activity on the infrared (0.3-1000 µm) spectral energy distributions (SEDs) of luminous infrared galaxies from z = 0.5 to 4.0. We have compiled a large sample of 151 galaxies selected at 24 µm (S 24 >~ 100 µJy) in the GOODS-N and ECDFS fields…
Evidence for Dark Matter Contraction and a Salpeter Initial Mass Function in a Massive Early-type Galaxy
Treu, T.; Auger, M. W.; Gavazzi, R. +5 more
Stars and dark matter account for most of the mass of early-type galaxies, but uncertainties in the stellar population and the dark matter profile make it challenging to distinguish between the two components. Nevertheless, precise observations of stellar and dark matter are extremely valuable for testing the many models of structure formation and…
The XMM Cluster Survey: optical analysis methodology and the first data release
Hilton, Matt; Stanford, S. A.; Stott, John P. +36 more
The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMM-Newton Science Archive. Its main aims are to measure cosmological parameters and trace the evolution of X-ray scaling relations. In this paper we present the first data release from the XMM Cluster Survey (XCS-DR1). This consists…
G0.253 + 0.016: A Molecular Cloud Progenitor of an Arches-like Cluster
Longmore, Steven N.; Battersby, Cara; Meingast, Stefan +20 more
Young massive clusters (YMCs) with stellar masses of 104-105 M ⊙ and core stellar densities of 104-105 stars per cubic pc are thought to be the "missing link" between open clusters and extreme extragalactic super star clusters and globular clusters. As such, studying the initial conditions of …
Relativistic iron K X-ray reverberation in NGC 4151
Fabian, A. C.; Reynolds, C. S.; Cackett, E. M. +1 more
Recent X-ray observations have enabled the study of reverberation delays in active galactic nuclei (AGN) for the first time. All the detections so far are in sources with a strong soft excess, and the measured delay is between the hard (1-3 keV) direct continuum and the soft excess (0.5-1 keV), interpreted as the reflection continuum smeared by re…
The surface composition of Iapetus: Mapping results from Cassini VIMS
Nicholson, Philip D.; Baines, Kevin H.; Buratti, Bonnie J. +11 more
Cassini VIMS has obtained spatially resolved imaging spectroscopy data on numerous satellites of Saturn. A very close fly-by of Iapetus on September 10, 2007 provided the best data on the spectral signature and spatial extent of dark material on Iapetus. This Cassini Rev 49 Iapetus fly-by provided spatially resolved imaging spectroscopy data of th…
A Redshift Survey of Herschel Far-infrared Selected Starbursts and Implications for Obscured Star Formation
Berta, S.; Magnelli, B.; Lutz, D. +30 more
We present Keck spectroscopic observations and redshifts for a sample of 767 Herschel-SPIRE selected galaxies (HSGs) at 250, 350, and 500 µm, taken with the Keck I Low Resolution Imaging Spectrometer and the Keck II DEep Imaging Multi-Object Spectrograph. The redshift distribution of these SPIRE sources from the Herschel Multitiered Extragal…
Multi-wavelength View of Kiloparsec-scale Clumps in Star-forming Galaxies at z ~ 2
Ferguson, Henry C.; Giavalisco, Mauro; Koekemoer, Anton M. +2 more
This paper studies the properties of kiloparsec-scale clumps in star-forming galaxies at z ~ 2 through multi-wavelength broadband photometry. A sample of 40 clumps is identified from Hubble Space Telescope (HST)/Advanced Camera for Surveys (ACS) z-band images through auto-detection and visual inspection from 10 galaxies with 1.5 < z < 2.5 in…
The Deflection of the Two Interacting Coronal Mass Ejections of 2010 May 23-24 as Revealed by Combined in Situ Measurements and Heliospheric Imaging
Möstl, C.; Farrugia, C. J.; Temmer, M. +4 more
In 2010 May 23-24, Solar Dynamics Observatory (SDO) observed the launch of two successive coronal mass ejections (CMEs), which were subsequently tracked by the SECCHI suite on board STEREO. Using the COR2 coronagraphs and the heliospheric imagers (HIs), the initial direction of both CMEs is determined to be slightly west of the Sun-Earth line. We …