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Active Region Modulation of Coronal Hole Solar Wind
Wicks, Robert T.; Long, David M.; Harra, Louise K. +4 more
Active regions (ARs) are a candidate source of the slow solar wind (SW), the origins of which are a topic of ongoing research. We present a case study that examines the processes by which SW is modulated in the presence of an AR in the vicinity of the SW source. We compare properties of SW associated with a coronal hole (CH)-quiet Sun boundary to …
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 …
LISA Pathfinder mission extension: A feasibility analysis
Rasotto, Mirco; Renk, Florian; Dei Tos, Diogene A. +1 more
A proposed mission extension for LISA Pathfinder involved redirecting the probe to the Sun-Earth gravitational saddle point. Realistic models for both space and ground segments were used to carry out a number of analyses for trajectory design, orbit determination, and navigation cost. In this work, we present the methods that allow assessing the f…
Interpretation through experimental simulations of phase functions revealed by Rosetta in 67P/Churyumov-Gerasimenko dust coma
Lasue, J.; Fulle, M.; Bertini, I. +3 more
Context. The dust-brightness phase curves that have been measured by the OSIRIS cameras on board the Rosetta spacecraft within the coma of comet 67P/Churyumov-Gerasimenko (67P) present a remarkable flattened u-shape.
Aims: Our goal is to compare these phase curves with those of tentatively analog dust samples to assess the key dust properties…
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 VLBI study of the wind-wind collision region in the massive multiple HD 167971
Galván-Madrid, R.; Brandner, W.; Herrero-Illana, R. +7 more
Context. Colliding winds in massive binaries are able to accelerate particles up to relativistic speeds as the result of the interaction between the winds of the different stellar components. HD 167971 exhibits this phenomenon which makes it a strong radio source.
Aims: We aim at characterizing the morphology of the radio emission and its dep…
A New South Polar Digital Terrain Model of Mars from the High-Resolution Stereo Camera (HRSC) onboard the ESA Mars Express
Muller, Jan-Peter; Putri, Alfiah Rizky Diana; Sidiropoulos, Panagiotis +2 more
The first high-resolution Digital Terrain Model (DTM) of the entire South Pole of Mars has been produced. A modified version (Kim and Muller, 2009) of a NASA-VICAR-based pipeline developed by DLR (German Aerospace Centre) and JPL (Jet Propulsion Laboratory) has been employed with image matching based on the Gotcha (Gruen-Otto-Chau) algorithm (Shin…
Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko
Lamy, P. L.; Lara, L. M.; Shi, X. +44 more
By using the Rosetta/OSIRIS-NAC data set taken in 2014 August, we focus on the neck region, called Hapi, located on 67P Churyumov-Gerasimenko's Northern hemisphere. The gravitational potential and slopes of Hapi, coupled with the geological unit identification and the boulder size-frequency distributions, support the interpretation that both talus…
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…
Development of models for nearbaby young stellar moving groups: creation, revision, and finalization of the models
Song, Inseok; Lee, Jinhee
In our previous research, we developed a tool for calculating Bayesian membership probability for nearby young stellar moving groups (BAMG: Bayesian Analysis of Moving Groups). The study presented the importance of careful construction of models in moving group membership assessment, using β Pictoris moving group as a test case. In this study, we …