Search Publications
RELICS: A Strong Lens Model for SPT-CLJ0615-5746, a z = 0.972 Cluster
Mahler, Guillaume; Frye, Brenda L.; Bradač, Maruša +30 more
We present a lens model for the cluster SPT-CLJ0615-5746, which is the highest-redshift (z = 0.972) system in the Reionization of Lensing Clusters Survey, making it the highest-redshift cluster for which a full, strong lens model is published. We identify three systems of multiply imaged lensed galaxies, two of which we spectroscopically confirm a…
Observations of SN 2015F Suggest a Correlation between the Intrinsic Luminosity of Type Ia Supernovae and the Shape of Their Light Curves >900 Days after Explosion
Zurek, David R.; Rest, Armin; Riess, Adam G. +6 more
The late-time light curves of Type Ia supernovae (SNe Ia), observed >900 days after explosion, present the possibility of a new diagnostic for SN Ia progenitor and explosion models. First, however, we must discover what physical process (or processes) leads to the slow-down of the light curve relative to a pure 56Co decay, as observe…
Plasma Evolution within an Erupting Coronal Cavity
Long, David M.; Harra, Louise K.; Matthews, Sarah A. +5 more
Coronal cavities have previously been observed to be associated with long-lived quiescent filaments and are thought to correspond to the associated magnetic flux rope. Although the standard flare model predicts a coronal cavity corresponding to the erupting flux rope, these have only been observed using broadband imaging data, restricting an analy…
Multiwavelength Observations of a New Redback Millisecond Pulsar Candidate: 3FGL J0954.8-3948
Cheng, K. S.; Strader, Jay; Kong, Albert K. H. +6 more
We present a multiwavelength study of the unassociated Fermi Large Area Telescope (LAT) source, 3FGL J0954.8-3948, which is likely the γ-ray counterpart of a 9.3 hr binary in the field. With more than 9 years of Pass 8 LAT data, we updated the γ-ray spectral properties and the LAT localization of the γ-ray source. While the binary lies outside the…
The Duration of Energy Deposition on Unresolved Flaring Loops in the Solar Corona
Polito, Vanessa; Warren, Harry P.; Crump, Nicholas A. +1 more
Solar flares form and release energy across a large number of magnetic loops. The global parameters of flares, such as the total energy released, duration, physical size, etc., are routinely measured, and the hydrodynamics of a coronal loop subjected to intense heating have been extensively studied. It is not clear, however, how many loops compris…
The BOSS Emission-line Lens Survey. V. Morphology and Substructure of Lensed Lyα Emitters at Redshift Z ≈ 2.5 in the BELLS GALLERY
Brownstein, Joel R.; Marques-Chaves, Rui; Oguri, Masamune +9 more
We present a morphological study of the 17 lensed Lyα emitter (LAE) galaxies of the Baryon Oscillation Spectroscopic Survey Emission-Line Lens Survey (BELLS) for the GALaxy-Lyα EmitteR sYstems (BELLS GALLERY) sample. This analysis combines the magnification effect of strong galaxy-galaxy lensing with the high resolution of the Hubble Space Telesco…
Molecular Gas Filaments and Star-forming Knots Beneath an X-Ray Cavity in RXC J1504-0248
Fabian, A. C.; Combes, F.; McDonald, M. +6 more
We present recent ALMA observations of the CO (1-0) and CO (3-2) emission lines in the brightest cluster galaxy of RXC J1504.1-0248, which is one of the most extreme cool core clusters known. The central galaxy contains 1.9× {10}10 {M}⊙ of molecular gas. The molecular gas morphology is complex and disturbed, showing no evide…
A Si IV/O IV Electron Density Diagnostic for the Analysis of IRIS Solar Spectra
Peter, H.; Young, P. R.; Keenan, F. P. +1 more
Solar spectra of ultraviolet bursts and flare ribbons from the Interface Region Imaging Spectrograph (IRIS) have suggested high electron densities of > {10}12 cm-3 at transition region temperatures of 0.1 MK, based on large intensity ratios of Si IV λ1402.77 to O IV λ1401.16. In this work, a rare observation of the weak O …
The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up
Camilo, F.; Guillemot, L.; Johnson, T. J. +23 more
We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources from the third LAT source catalog (3FGL), selected using the Gaussian Mixture Model machine-learning algorit…
First Detection of Solar Flare Emission in Mid-ultraviolet Balmer Continuum
Heinzel, Petr; Dammasch, Ingolf E.; Schmutz, Werner +8 more
We present the first detection of solar flare emission at mid-ultraviolet wavelengths around 2000 Å by the channel 2 of the Large-Yield RAdiometer (LYRA) on board the PRoject for OnBoard Autonomy 2 mission. The flare (SOL20170906) was also observed in the channel 1 of LYRA centered at the H I Lyα line at 1216 Å, showing a clear non-thermal profile…