Search Publications
Detection of a Substantial Molecular Gas Reservoir in a Brightest Cluster Galaxy at z = 1.7
Muzzin, Adam; Yee, H. K. C.; Cybulski, Ryan +7 more
We report the detection of CO(2-1) emission coincident with the brightest cluster galaxy (BCG) of the high-redshift galaxy cluster SpARCS1049+56, with the Redshift Search Receiver (RSR) on the Large Millimeter Telescope (LMT). We confirm a spectroscopic redshift for the gas of z = 1.7091 ± 0.0004, which is consistent with the systemic redshift of …
Hubble Space Telescope Scattered-light Imaging and Modeling of the Edge-on Protoplanetary Disk ESO-Hα 569
Duchêne, Gaspard; Wolff, Schuyler G.; Perrin, Marshall D. +6 more
We present new Hubble Space Telescope (HST) Advanced Camera for Surveys observations and detailed models for a recently discovered edge-on protoplanetary disk around ESO-Hα 569 (a low-mass T Tauri star in the Cha I star-forming region). Using radiative transfer models, we probe the distribution of the grains and overall shape of the disk (inclinat…
Different Accretion Heating of the Neutron Star Crust during Multiple Outbursts in MAXI J0556-332
Homan, Jeroen; Miller, Jon M.; Fridriksson, Joel K. +12 more
The transient neutron star (NS) low-mass X-ray binary MAXI J0556-332 provides a rare opportunity to study NS crust heating and subsequent cooling for multiple outbursts of the same source. We examine MAXI, Swift, Chandra, and XMM-Newton data of MAXI J0556-332 obtained during and after three accretion outbursts of different durations and brightness…
Cusp-shaped Structure of a Jet Observed By IRIS and SDO
Zhang, Jun; Zhang, Yuzong
On 2014 August 29, the trigger and evolution of a cusp-shaped jet were captured in detail at 1330 Å by the Interface Region Imaging Spectrograph. At first, two neighboring mini-prominences arose in turn from the low solar atmosphere and collided with a loop-like system over them. The collisions between the loop-like system and the mini-prominences…
Three-dimensional Simulations and Spacecraft Observations of Sub-ion Scale Turbulence in the Solar Wind: Influence of Landau Damping
Passot, T.; Sahraoui, F.; Henri, P. +5 more
Three-dimensional nonlinear finite Larmor radius (FLR)-Landau fluid simulations, which include some small-scale ({k}\perp {ρ }I≳ 1) kinetic effects, are performed to explore the nature of the sub-ion scale turbulence in the solar wind and to investigate the role of Landau damping and FLR corrections. The resulting steady-stat…
Magnetohydrodynamic Simulations for Studying Solar Flare Trigger Mechanism
Kusano, K.; Shiota, D.; Inoue, S. +1 more
In order to understand the flare trigger mechanism, we conduct three-dimensional magnetohydrodynamic simulations using a coronal magnetic field model derived from data observed by the Hinode satellite. Several types of magnetic bipoles are imposed into the photospheric boundary of the Nonlinear Force-free Field model of Active Region (AR) NOAA 109…
Discovery of the First Quadruple Gravitationally Lensed Quasar Candidate with Pan-STARRS
Keeton, C. R.; Berghea, C. T.; Dudik, R. P. +2 more
We report the serendipitous discovery of the first gravitationally lensed quasar candidate from Pan-STARRS. The grizy images reveal four point-like images with magnitudes between 14.9 and 18.1 mag. The colors of the point sources are similar, and they are more consistent with quasars than with stars or galaxies. The lensing galaxy is detected in t…
Global Energetics of Solar Flares. VI. Refined Energetics of Coronal Mass Ejections
Aschwanden, Markus J.
In this study, we refine the coronal mass ejection (CME) model that was presented in an earlier study of the global energetics of solar flares and associated CMEs and apply it to all (860) GOES M- and X-class flare events observed during the first seven years (2010-2016) of the Solar Dynamics Observatory (SDO) mission. The model refinements includ…
Hubble Space Telescope Imaging of the Active Dwarf Galaxy RGG 118
Greene, Jenny E.; Baldassare, Vivienne F.; Reines, Amy E. +1 more
RGG 118 (SDSS 1523+1145) is a nearby (z = 0.0243), dwarf disk galaxy ({M}* ≈ 2× {10}9 {M}⊙ ) that is found to host an active ∼50,000 solar mass black hole at its core. RGG 118 is one of a growing collective sample of dwarf galaxies known to contain active galactic nuclei (AGNs)—a group that, until recently, contain…
Sheath-accumulating Propagation of Interplanetary Coronal Mass Ejection
Shibata, Kazunari; Takahashi, Takuya
Fast interplanetary coronal mass ejections (ICMEs) are the drivers of strong space weather storms such as solar energetic particle events and geomagnetic storms. The connection between the space-weather-impacting solar wind disturbances associated with fast ICMEs at Earth and the characteristics of causative energetic CMEs observed near the Sun is…