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On the influence of shock-cloud interactions on the nonthermal X-ray emission from the supernova remnant RCW 86
Vink, Jacco; Bamba, Aya; Sano, Hidetoshi +1 more
The effect of the surrounding environment of supernova remnant shocks on nonthermal X-rays from accelerated electrons, with or without interacting dense material, is an open issue. We conduct spatially resolved X-ray spectroscopy of the shock-cloud interacting region of RCW 86 with XMM-Newton. It is found that bright soft X-ray filaments surround …
Characterization of Low-mass Companions to Kepler Objects of Interest Observed with APOGEE-N
Bizyaev, Dmitry; Schneider, Donald P.; Mahadevan, Suvrath +12 more
We report the characterization of 28 low-mass (0.02 M ⊙ ≤ M 2 ≤ 0.25 M ⊙) companions to Kepler objects of interest (KOIs), eight of which were previously designated confirmed planets. These objects were detected as transiting companions to Sunlike stars (G and F dwarfs) by the Kepler mission and are confirmed as si…
Comparison of the Composition of ICMEs from Active Regions and Quiet-Sun Regions
Chen, Yao; Fu, Hui; Li, Leping +4 more
The composition of interplanetary coronal mass ejections (ICMEs), including the ionic charge states and elemental abundances of heavy elements, is tightly correlated with their source regions and eruption processes. This can help in analyzing the eruption mechanisms and plasma origins of CMEs, and deepen our understanding of energetic solar activi…
Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?
Lee, Myung Gyoon; Jang, In Sung; Oh, Seong-A.
NGC 4839 is the brightest galaxy (cD) of the NGC 4839 group at R ≈ 1 Mpc in the southwest of the Coma cluster, which is known to be falling into Coma. However, it has been controversial whether it is in the first phase of infall or in the second phase of infall after passing the Coma center. We present a wide field study of globular clusters (GCs)…
Made-to-measure modelling of globular clusters
Bovy, Jo; Hunt, Jason A. S.; Webb, Jeremy J.
We present the first application of the made-to-measure method for modelling dynamical systems to globular clusters. Through the made-to-measure algorithm, the masses of individual particles within a model cluster are adjusted while the system evolves forward in time via a gravitational N-body code until the model cluster is able to reproduce sele…
Kepler Bonus: Light Curves of Kepler Background Sources
Hedges, Christina; Martínez-Palomera, Jorge; Dotson, Jessie
NASA's Kepler primary mission observed about 116 deg2 in the sky for 3.5 consecutive years to discover Earth-like exoplanets. This mission recorded pixel cutouts, known as target pixel files (TPFs), of over 200,000 targets that were selected to maximize the scientific yield. The Kepler pipeline performed aperture photometry for these pr…
A Statistical Relation between Mass, Age, and Velocity Dispersion in the Solar Neighborhood
Sajadian, Sedighe; Fatheddin, Hossein
The stellar kinematics of the Galactic disk are the main factors constraining disk formation and evolution processes in the Milky Way. In this paper, we investigate a statistical relation between stellar mass, age, and velocity dispersion for stars in the solar neighborhood. Age-velocity dispersion relations, with their applications, have been stu…
Formation and thermodynamic evolution of plasmoids in active region jets
Del Zanna, Giulio; Mulay, Sargam M.; Tripathi, Durgesh +2 more
We have carried out a comprehensive study of the temperature structure of plasmoids, which successively occurred in recurrent active region jets. The multithermal plasmoids were seen to be travelling along the multithreaded spire as well as at the footpoint region in the EUV/UV images recorded by the Atmospheric Imaging Assembly (AIA). The differe…
Boundary Delineator for Martian Crater Instances with Geographic Information and Deep Learning
Liu, Danyang; Cheng, Weiming; Qian, Zhen +3 more
Detecting impact craters on the Martian surface is a critical component of studying Martian geomorphology and planetary evolution. Accurately determining impact crater boundaries, which are distinguishable geomorphic units, is important work in geological and geomorphological mapping. The Martian topography is more complex than that of the Moon, m…
X-Ray Emission of Ultraviolet Variable Active Galactic Nucleus Candidates
Wasleske, Erik J.; Baldassare, Vivienne F.
We analyze the X-ray properties of a sample of 23 high-probability active galactic nucleus (AGN) candidates with ultraviolet variability identified in Wasleske et al. Using data from the Chandra X-ray Observatory and XMM-Newton Observatory, we that find 11/23 nuclei are X-ray detected. We use spectral energy distribution modeling to compute star f…