Search Publications
Spatial and Kinematic Clustering of Stars in the Galactic Disk
Conroy, Charlie; Ting, Yuan-Sen; El-Badry, Kareem +1 more
The Galactic disk is expected to be spatially and kinematically clustered on many scales due to both star formation and the Galactic potential. In this work we calculate the spatial and kinematic two-point correlation functions (TPCF) using a sample of 1.7 × 106 stars with radial velocities from Gaia DR2. Clustering is detected on spati…
Magnetofrictional Modeling of an Erupting Pseudostreamer
Reeves, Katharine K.; DeLuca, Edward E.; Savcheva, Antonia +4 more
In this study, we present the magnetic configuration of an erupting pseudostreamer observed on 2015 April 19, on the southwest limb of the Sun, with a prominence cavity embedded inside. The eruption resulted in a partial halo coronal mass ejection. The prominence eruption begins with a slow rise and then evolves to a fast-rise phase. We analyze th…
An Insight into the Coupling of CME Kinematics in Inner and Outer Corona and the Imprint of Source Regions
Pant, Vaibhav; Banerjee, Dipankar; Patel, Ritesh +1 more
Despite studying coronal mass ejections (CMEs) for several years, we do not yet have a complete understanding of their kinematics. To this end, it is essential to understand the change in kinematics of the CMEs as they travel from the inner corona (<3 R⊙) up to the higher heights of the outer corona. We conduct a follow-up statistica…
Eclipsing Binaries Found by the EREBOS Project: Gaia DR2 6097540197980557440-a Deeply Eclipsing sdB+dM System
Barlow, Brad N.; Corcoran, Kyle A.; Schaffenroth, Veronika +3 more
We present time-series spectroscopy and photometry of Gaia DR2 6097540197980557440, a new deeply eclipsing hot subdwarf B (sdB) + M dwarf (dM) binary. We discovered this object during the course of the Eclipsing Reflection Effect Binaries from Optical Surveys (EREBOS) project, which aims to find new eclipsing sdB+dM binaries (HW Vir systems) and i…
The Quest for the Missing Dust. I. Restoring Large-scale Emission in Herschel Maps of Local Group Galaxies
Gordon, Karl D.; Bot, Caroline; Clark, Christopher J. R. +2 more
Because the galaxies of the Local Group have such large angular sizes, much of their diffuse, large-angular-scale emission is filtered out by the Herschel data reduction process. In this work, we restore this previously missed dust in Herschel observations of the Large Magellanic Cloud, Small Magellanic Cloud, M31, and M33. We do this by combining…
Sympathetic Standard and Blowout Coronal Jets Observed in a Polar Coronal Hole
Shen, Yuandeng; Zhou, Chengrui; Zhou, Xinping +4 more
We present the sympathetic eruption of a standard and a blowout coronal jet originating from two adjacent coronal bright points (CBP1 and CBP2) in a polar coronal hole, using soft X-ray and extreme-ultraviolet observations respectively taken by the Hinode and the Solar Dynamics Observatory. In the event, a collimated jet with obvious westward late…
The Structural Connection between Coronal Mass Ejection Flux Ropes near the Sun and at 1 au
Gopalswamy, N.; Xie, H.; Akiyama, S.
We have performed the first comprehensive statistical analysis comparing flux rope (FR) structures of coronal mass ejections (CMEs) near the Sun and at 1 au, using Solar and Heliospheric Observatory and Solar Terrestrial Relations Observatory measurements for the two full solar cycles 23 and 24. This study aims to investigate the physical connecti…
Visibility Interpolation in Solar Hard X-Ray Imaging: Application to RHESSI and STIX
Massa, Paolo; Piana, Michele; Perracchione, Emma +1 more
Space telescopes for solar hard X-ray imaging provide observations made of sampled Fourier components of the incoming photon flux. The aim of this study is to design an image reconstruction method relying on enhanced visibility interpolation in the Fourier domain. The interpolation-based method is applied to synthetic visibilities generated by mea…
The CARMA-NRO Orion Survey: Filament Formation via Collision-induced Magnetic Reconnection—the Stick in Orion A
Mairs, Steve; Nakamura, Fumitaka; Klessen, Ralf S. +13 more
A unique filament is identified in the Herschel maps of the Orion A giant molecular cloud. The filament, which we name the Stick, is ruler-straight and at an early evolutionary stage. Transverse position-velocity diagrams show two velocity components closing in on the Stick. The filament shows consecutive rings/forks in C18O (1-0) chann…
Strongly Lensed Supernova Refsdal: Refining Time Delays Based on the Supernova Explosion Models
Nomoto, Ken'ichi; Blinnikov, Sergei; Baklanov, Petr +1 more
We explore the properties of supernova (SN) "Refsdal"—the first discovered gravitationally lensed SN with multiple images. A large magnification provided by the galactic-scale lens, augmented by the cluster lens, gave us a unique opportunity to perform a detailed modeling of a distant SN at $z\simeq 1.5$ . We present results of radiation hydrodyna…