Search Publications
Galaxy Candidates at z ~ 10 in Archival Data from the Brightest of Reionizing Galaxies (BORG[z8]) Survey
Treu, T.; Mason, C. A.; Trenti, M. +9 more
The Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) enabled the search for the first galaxies observed at z ∼ 8-11 (500-700 Myr after the Big Bang). To continue quantifying the number density of the most luminous galaxies (M AB ∼ -22.0) at the earliest epoch observable with HST, we search for z ∼ 10 galaxies (F125W-drop…
A Hard X-Ray Study of the Normal Star-forming Galaxy M83 with NuSTAR
Argo, M. K.; Krivonos, R.; Wik, D. R. +19 more
We present the results from sensitive, multi-epoch NuSTAR observations of the late-type star-forming galaxy M83 (d = 4.6 Mpc). This is the first investigation to spatially resolve the hard (E\gt 10 keV) X-ray emission of this galaxy. The nuclear region and ∼20 off-nuclear point sources, including a previously discovered ultraluminous X-ray source,…
Helical Motions of Fine-structure Prominence Threads Observed by Hinode and IRIS
Liu, Wei; Tsuneta, Saku; Okamoto, Takenori J.
Fine-structure dynamics in solar prominences holds critical clues to understanding their physical nature of significant space-weather implications. We report evidence of rotational motions of horizontal helical threads in two active-region prominences observed by the Hinode and/or Interface Region Imaging Spectrograph satellites at high resolution…
Thermal Pressures in the Interstellar Medium of the Magellanic Clouds
York, Donald G.; Lauroesch, James T.; Welty, Daniel E. +1 more
We discuss the thermal pressures (nHT) in predominantly cold, neutral interstellar gas in the Magellanic Clouds, derived from analyses of the fine-structure excitation of neutral carbon, as seen in high-resolution Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra of seven diverse sight lines in the LMC and SMC. Detaile…
Kiloparsec Mass/Light Offsets in the Galaxy Pair-Lyα Emitter Lens System SDSS J1011+0143
Brownstein, Joel R.; Dey, Arjun; Spinrad, Hyron +5 more
We report the discovery of significant mass/light offsets in the strong gravitational lensing system SDSS J1011+0143. We use the high-resolution Hubble Space Telescope (HST) F555W- and F814W-band imaging and Sloan Digital Sky Survey (SDSS) spectroscopy of this system, which consists of a close galaxy pair with a projected separation of ≈ 4.2 {{kpc…
Active Longitude and Solar Flare Occurrences
Ludmány, A.; Baranyi, T.; Gyenge, N.
The aim of the present work is to specify the spatio-temporal characteristics of flare activity observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and the Geostationary Operational Environmental Satellite (GOES) in connection with the behavior of the longitudinal domain of enhanced sunspot activity known as active longit…
The Effects of Kinetic Instabilities on Small-scale Turbulence in Earth’s Magnetosheath
Vaivads, A.; Alexandrova, O.; Breuillard, H. +1 more
The Earth's magnetosheath is the region delimited by the bow shock and the magnetopause. It is characterized by highly turbulent fluctuations covering all scales from MHD down to kinetic scales. Turbulence is thought to play a fundamental role in key processes such as energy transport and dissipation in plasma. In addition to turbulence, different…
Down-the-barrel and Transverse Observations of the Large Magellanic Cloud: Evidence for a Symmetric Galactic Wind on the Near and Far Sides of the Galaxy
Lehner, N.; Howk, J. C.; Barger, K. A.
We compare the properties of gas flows on both the near and far side of the Large Magellanic Cloud (LMC) disk using Hubble Space Telescope UV absorption-line observations toward an active galactic nucleus behind (transverse) and a star within (down-the-barrel) the LMC disk at an impact parameter of 3.2 {kpc}. We find that even in this relatively q…
Deep Morphological and Spectral Study of the SNR RCW 86 with Fermi-LAT
Troja, E.; Orlando, E.; Hill, A. B. +107 more
RCW 86 is a young supernova remnant (SNR) showing a shell-type structure at several wavelengths and is thought to be an efficient cosmic-ray (CR) accelerator. Earlier Fermi Large Area Telescope results reported the detection of γ-ray emission coincident with the position of RCW 86 but its origin (leptonic or hadronic) remained unclear due to the p…
Distance-dependent Offsets between Parallaxes for Nearby Stars and Gaia DR1 Parallaxes
Gies, Douglas R.; Henry, Todd J.; Winters, Jennifer G. +3 more
We use 612 single stars with previously published trigonometric parallaxes placing them within 25 pc to evaluate parallaxes released in Gaia’s first data release (DR1). We find that the Gaia parallaxes are, on average, 0.24 ± 0.02 mas smaller than the weighted mean trigonometric parallax values for these stars in the solar neighborhood. We also fi…