Search Publications
A new multifield determination of the galaxy luminosity function at z = 7-9 incorporating the 2012 Hubble Ultra-Deep Field imaging
Bowler, R. A. A.; McLure, R. J.; Dunlop, J. S. +14 more
We present a new determination of the ultraviolet (UV) galaxy luminosity function (LF) at redshift z ≃ 7 and 8, and a first estimate at z ≃ 9. An accurate determination of the form and evolution of the galaxy LF during this era is of key importance for improving our knowledge of the earliest phases of galaxy evolution and the process of cosmic rei…
Hydrous minerals on Mars as seen by the CRISM and OMEGA imaging spectrometers: Updated global view
Mangold, N.; Bibring, J. -P.; Poulet, F. +2 more
The surface of Mars has preserved the record of early environments in which its basaltic crust was altered by liquid water. These aqueous environments have survived in the form of hydrological morphologies and alteration minerals, including clays and hydrated salts. Because these minerals probe on Earth aqueous environments compatible with biotic …
How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
Li, Y.; Lynch, B. J.; Howard, R. A. +1 more
We intend to provide a comprehensive answer to the question on whether all Coronal Mass Ejections (CMEs) have flux rope structure. To achieve this, we present a synthesis of the LASCO CME observations over the last 16 years, assisted by 3D MHD simulations of the breakout model, EUV and coronagraphic observations from STEREO and SDO, and statistics…
Dusty starburst galaxies in the early Universe as revealed by gravitational lensing
Sharon, K.; Gladders, M. D.; Menten, K. M. +67 more
In the past decade, our understanding of galaxy evolution has been revolutionized by the discovery that luminous, dusty starburst galaxies were 1,000 times more abundant in the early Universe than at present. It has, however, been difficult to measure the complete redshift distribution of these objects, especially at the highest redshifts (z > …
Fast Molecular Outflows in Luminous Galaxy Mergers: Evidence for Quasar Feedback from Herschel
Lutz, D.; Genzel, R.; Maiolino, R. +18 more
We report the results from a systematic search for molecular (OH 119 µm) outflows with Herschel/PACS in a sample of 43 nearby (z < 0.3) galaxy mergers, mostly ultraluminous infrared galaxies (ULIRGs) and QSOs. We find that the character of the OH feature (strength of the absorption relative to the emission) correlates with that of the 9.7…
The Dust Attenuation Law in Distant Galaxies: Evidence for Variation with Spectral Type
Conroy, Charlie; Kriek, Mariska
This Letter utilizes composite spectral energy distributions (SEDs) constructed from NEWFIRM Medium-Band Survey photometry to constrain the dust attenuation curve in 0.5 < z < 2.0 galaxies. Based on similarities between the full SED shapes (0.3-8 µm), we have divided galaxies in 32 different spectral classes and stacked their photometr…
Irradiation of an accretion disc by a jet: general properties and implications for spin measurements of black holes
Reynolds, C. S.; Dauser, T.; Wilms, J. +5 more
X-ray irradiation of the accretion disc leads to strong reflection features, which are then broadened and distorted by relativistic effects. We present a detailed, general relativistic approach to model this irradiation for different geometries of the primary X-ray source. These geometries include the standard point source on the rotational axis a…
Two Accurate Time-delay Distances from Strong Lensing: Implications for Cosmology
Treu, T.; Blandford, R. D.; Auger, M. W. +9 more
Strong gravitational lenses with measured time delays between the multiple images and models of the lens mass distribution allow a one-step determination of the time-delay distance, and thus a measure of cosmological parameters. We present a blind analysis of the gravitational lens RXJ1131-1231 incorporating (1) the newly measured time delays from…
CLASH: Three Strongly Lensed Images of a Candidate z ≈ 11 Galaxy
Donahue, Megan; Broadhurst, Tom; Kelson, Daniel D. +20 more
We present a candidate for the most distant galaxy known to date with a photometric redshift of z = 10.7+0.6 -0.4 (95% confidence limits; with z < 9.5 galaxies of known types ruled out at 7.2σ). This J-dropout Lyman break galaxy, named MACS0647-JD, was discovered as part of the Cluster Lensing and Supernova survey with Hub…
The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations
Aigrain, S.; Pont, F.; Gibson, N. P. +3 more
The hot Jupiter HD 189733b is the most extensively observed exoplanet. Its atmosphere has been detected and characterized in transmission and eclipse spectroscopy, and its phase curve measured at several wavelengths. This paper brings together the results of our campaign to obtain the complete transmission spectrum of the atmosphere of this planet…