Search Publications
Quantifying the Propagation of Fast Coronal Mass Ejections from the Sun to Interplanetary Space by Combining Remote Sensing and Multi-point In Situ Observations
Wang, Rui; Liu, Ying D.; Hu, Huidong +1 more
In order to have a comprehensive view of the propagation and evolution of coronal mass ejections (CMEs) from the Sun to deep interplanetary space beyond 1 au, we carry out a kinematic analysis of seven CMEs in solar cycle 23. The events are required to have coordinated coronagraph observations, interplanetary type II radio bursts, and multi-point …
Precise Mass Determination of SPT-CL J2106-5844, the Most Massive Cluster at z > 1
Huang, Xiaosheng; Rubin, David; Perlmutter, Saul +5 more
We present a detailed high-resolution weak-lensing study of SPT-CL J2106-5844 at z = 1.132, claimed to be the most massive system discovered at z > 1 in the South Pole Telescope Sunyaev-Zel’dovich survey. Based on the deep imaging data from the Advanced Camera for Surveys and Wide Field Camera 3 on board the Hubble Space Telescope, we find that…
A Three-dimensional View of Molecular Hydrogen in SN 1987A
Larsson, J.; Spyromilio, J.; Fransson, C. +6 more
SN 1987A is the only young supernova (SN) in which H2 has been detected in the ejecta. The properties of H2 are important for understanding the explosion and the ejecta chemistry. Here we present new Very Large Telescope/SINFONI observations of H2 in SN 1987A, focusing on the 2.12 µm (1,0)S(1) line. We find t…
Turbulent Heating in Solar Wind Thermodynamics
Livadiotis, G.
This paper considers the concept of wave-particle thermodynamic equilibrium in order to improve our understanding of the role of turbulent heating in the solar wind proton plasma. The thermodynamic equilibrium in plasmas requires the energy of a plasmon—the quantum of plasma fundamental oscillation—to be balanced by the proton-magnetized plasma en…
Tracking the Footprints of the Radio Pulsar B1727-47: Proper Motion, Host Supernova Remnant, and the Glitches
Shternin, P.; Kirichenko, A.; Zyuzin, D. +4 more
The bright radio pulsar B1727-47, with a characteristic age of 80 kyr, was among the first pulsars discovered 50 yr ago. Using regular timing observations and its interferometric positions at three epochs, we measured, for the first time, the pulsar proper motion of 151 ± 19 mas yr-1. At the dispersion measure distance of ≳2.7 kpc, this…
First Detection of Submillimeter-wave [13C I] 3 P 1-3 P 0 Emission in a Gaseous Debris Disk of 49 Ceti with ALMA
Yamamoto, Satoshi; Higuchi, Aya E.; Oya, Yoko
We have detected the submillimeter-wave fine-structure transition (3 P 1-3 P 0) of 13C, [13C I], in the gaseous debris disk of 49 Ceti with the Atacama Large Millimeter/submillimeter Array (ALMA). Recently, the [C I] 3 P 1-3 P 0 emission h…
Dynamical Masses for the Triple System HD 28363 in the Hyades Cluster
Torres, Guillermo; Latham, David W.; Stefanik, Robert P.
The star HD 28363 in the Hyades cluster has been known for over a century as a visual binary with a period of 40 yr. The secondary is, in turn, a single-lined spectroscopic binary with a 21 day period. Here we report extensive spectroscopic monitoring of this hierarchical triple system that reveals the spectral lines of the third star for the firs…
Dissecting a Disk-instability Outburst in a Symbiotic Star: NuSTAR and Swift Observations of T Coronae Borealis during the Rise to the “Superactive” State
Nelson, T.; Mukai, K.; Sokoloski, J. L. +1 more
The current superactive state of the recurrent nova T Coronae Borealis (T CrB) has been observed with unprecedented detail. Previously published observations provide strong evidence that this state is due to an enhancement of the flow of material through the accretion disk, which increased the optical depth of its most internal region, the boundar…
Evidence of Hubble Flow-like Motion of Young Stellar Populations away from the Perseus Arm
Hernández, Jesús; Roman-Lopes, Alexandre; Tapia, Mauricio +2 more
In this Letter we present evidence of the coherent outward motion of a sample of young stars (t < 30 Myr) in the Perseus Arm, whose apparent origin is located in the vicinity of the W3/W4/W5 complex. Using astrometric and photometric data from the Gaia Data Release 2 catalog of an 8◦ radius field centered near W4, we selected a sampl…
Multiple Stellar Populations of Globular Clusters from Homogeneous Ca-CN-CH Photometry. V. {{cn}}_{JWL}}^{{\prime} } as a Surrogate cn JWL Index and NGC 6723
Lee, Jae-Woo
We introduce new color indices {{cn}}JWL}{\prime } (=Ca CTIO - Ca JWL) and ch JWL [=(JWL43 - b) - (b - y)], accurate photometric measures of the CN band at λ3883 and the CH G band, respectively, in the study of the multiple populations (MPs) in globular clusters (GCs). Our photometric CN-CH re…