Search Publications
Prevalence of small-scale jets from the networks of the solar transition region and chromosphere
Weber, M.; Peter, H.; Golub, L. +24 more
As the interface between the Sun’s photosphere and corona, the chromosphere and transition region play a key role in the formation and acceleration of the solar wind. Observations from the Interface Region Imaging Spectrograph reveal the prevalence of intermittent small-scale jets with speeds of 80 to 250 kilometers per second from the narrow brig…
High-density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The First 1100 Days
Smith, Nathan; France, Kevin; Fransson, Claes +16 more
Hubble Space Telescope and ground-based observations of the Type IIn supernova (SN) 2010jl are analyzed, including photometry and spectroscopy in the ultraviolet, optical, and near-IR bands, 26-1128 days after first detection. At maximum, the bolometric luminosity was ~3 × 1043 erg s-1 and even at 850 days exceeds 1042
The evolution of the dust temperatures of galaxies in the SFR-M∗ plane up to z ∼ 2
Berta, S.; Magnelli, B.; Nordon, R. +38 more
We study the evolution of the dust temperature of galaxies in the SFR- M∗ plane up to z ~ 2 using far-infrared and submillimetre observations from the Herschel Space Observatory taken as part of the PACS Evolutionary Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed time key programmes. Starting from a sampl…
BICEP2. II. Experiment and three-year Data Set
Ade, P. A. R.; Bock, J. J.; Hildebrandt, S. R. +49 more
We report on the design and performance of the BICEP2 instrument and on its three-year data set. BICEP2 was designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 1°-5°(l = 40-200), near the expected peak of the B-mode polarization signature of primordial gravitational waves from cosmic inflation. Measur…
Neutrinos Help Reconcile Planck Measurements with the Local Universe
Hu, Wayne; Wyman, Mark; Rudd, Douglas H. +1 more
Current measurements of the low and high redshift Universe are in tension if we restrict ourselves to the standard six-parameter model of flat ΛCDM. This tension has two parts. First, the Planck satellite data suggest a higher normalization of matter perturbations than local measurements of galaxy clusters. Second, the expansion rate of the Univer…
A state change in the low-mass X-ray binary XSS J12270-4859
Edwards, P. G.; Corbel, S.; Bassa, C. G. +10 more
Millisecond radio pulsars acquire their rapid rotation rates through mass and angular momentum transfer in a low-mass X-ray binary system. Recent studies of PSR J1824-2452I and PSR J1023+0038 have observationally demonstrated this link, and they have also shown that such systems can repeatedly transition back-and-forth between the radio millisecon…
Cosmology and astrophysics from relaxed galaxy clusters - II. Cosmological constraints
von der Linden, A.; Allen, S. W.; Mantz, A. B. +5 more
This is the second in a series of papers studying the astrophysics and cosmology of massive, dynamically relaxed galaxy clusters. The data set employed here consists of Chandra observations of 40 such clusters, identified in a comprehensive search of the Chandra archive for hot (kT ≳ 5 keV), massive, morphologically relaxed systems, as well as hig…
Cosmology from Gravitational Lens Time Delays and Planck Data
Treu, T.; Blandford, R. D.; Auger, M. W. +11 more
Under the assumption of a flat ΛCDM cosmology, recent data from the Planck satellite point toward a Hubble constant that is in tension with that measured by gravitational lens time delays and by the local distance ladder. Prosaically, this difference could arise from unknown systematic uncertainties in some of the measurements. More interestingly—…
PRISM (Polarized Radiation Imaging and Spectroscopy Mission): an extended white paper
García-Bellido, Juan; Palanque-Delabrouille, Nathalie; Fuller, Gary +139 more
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of the ESA Cosmic Vision program a set of important scientific questions that require high resolution, high sensitivity, full-sky observations of the sky emission at wavelengths ranging from m…
> 25 MeV Proton Events Observed by the High Energy Telescopes on the STEREO A and B Spacecraft and/or at Earth During the First ∼ Seven Years of the STEREO Mission
Christian, E. R.; Leske, R. A.; Labrador, A. W. +7 more
Using observations from the High Energy Telescopes (HETs) on the STEREO A and B spacecraft and similar observations from near-Earth spacecraft, we summarize the properties of more than 200 individual > 25 MeV solar proton events, some detected by multiple spacecraft, that occurred from the beginning of the STEREO mission in October 2006 to Dece…