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Two evolved supernova remnants with newly identified Fe-rich cores in the Large Magellanic Cloud
Haberl, F.; Filipović, M. D.; Maggi, P. +7 more
Aims: We present a multi-wavelength analysis of the evolved supernova remnants
Methods: We used observational data from XMM-Newton, the Australian Telescope Compact Array, and the Magellanic Cloud Emission Line Survey to study their…
Characteristics of proton velocity distribution functions in the near-lunar wake from Chandrayaan-1/SWIM observations
Barabash, Stas; Holmström, Mats; Futaana, Yoshifumi +5 more
Due to the high absorption of solar wind plasma on the lunar dayside, a large scale wake structure is formed downstream of the Moon. However, recent in-situ observations have revealed the presence of protons in the near-lunar wake (100 km to 200 km from the surface). The solar wind, either directly or after interaction with the lunar surface (incl…
Noncircular features in Saturn's rings III: The Cassini Division
Nicholson, Philip D.; French, Richard G.; McGhee-French, Colleen A. +5 more
We have conducted a comprehensive survey of 22 sharp-edged ringlets and gaps in the Cassini Division of Saturn's rings, making use of nearly 200 high-SNR stellar and radio occultation chords obtained by the Cassini VIMS, UVIS, and RSS instruments between 2005 and 2013. We measure eccentricities from as small as ae = 80 m to nearly 30 km, free norm…
Herschel/HIFI Spectral Mapping of C+, CH+, and CH in Orion BN/KL: The Prevailing Role of Ultraviolet Irradiation in CH+ Formation
Bergin, Edwin A.; Neufeld, David A.; Ossenkopf-Okada, Volker +8 more
The CH+ ion is a key species in the initial steps of interstellar carbon chemistry. Its formation in diverse environments where it is observed is not well understood, however, because the main production pathway is so endothermic (4280 K) that it is unlikely to proceed at the typical temperatures of molecular clouds. We investigate the …
MIDAS: Lessons learned from the first spaceborne atomic force microscope
Torkar, Klaus; Mannel, Thurid; Schmied, Roland +6 more
The Micro-Imaging Dust Analysis System (MIDAS) atomic force microscope (AFM) onboard the Rosetta orbiter was the first such instrument launched into space in 2004. Designed only a few years after the technique was invented, MIDAS is currently orbiting comet 67P Churyumov-Gerasimenko and producing the highest resolution 3D images of cometary dust e…
IDCS J1426.5+3508: Weak Lensing Analysis of a Massive Galaxy Cluster at z = 1.75
Massey, Richard; Rhodes, Jason; Marrone, Daniel P. +7 more
We present a weak lensing study of the galaxy cluster IDCS J1426.5+3508 at z = 1.75, which is the highest-redshift strong lensing cluster known and the most distant cluster for which a weak lensing analysis has been undertaken. Using F160W, F814W, and F606W observations with the Hubble Space Telescope, we detect tangential shear at 2σ significance…
Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey
Heymans, Catherine; Joachimi, Benjamin; Heavens, Alan F. +1 more
We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from the HST STAGES (Space Telescope A901/902 Galaxy Evolution Survey) survey of the A901/902 supercluster we detect the four known groups in the supercluster at high significance using magnification alone. We discuss th…
The Magnetic Field of L1544. I. Near-infrared Polarimetry and the Non-uniform Envelope
Tassis, K.; Goldsmith, Paul F.; Clemens, Dan P.
The magnetic field (B-field) of the starless dark cloud L1544 has been studied using near-infrared (NIR) background starlight polarimetry (BSP) and archival data in order to characterize the properties of the plane-of-sky B-field. NIR linear polarization measurements of over 1700 stars were obtained in the H band and 201 of these were also measure…
Chandra and XMM-Newton X-Ray Observations of the Hyperactive T Tauri Star RY Tau
Skinner, Stephen L.; Güdel, Manuel; Audard, Marc
We present results of pointed X-ray observations of the accreting jet-driving T Tauri star RY Tau using Chandra and XMM-Newton. We obtained high-resolution grating spectra and excellent-quality CCD spectra and light curves with the objective of identifying the physical mechanisms underlying RY Tau’s bright X-ray emission. Grating spectra reveal nu…
Three-dimensional Geometry of a Current Sheet in the High Solar Corona: Evidence for Reconnection in the Late Stage of the Coronal Mass Ejections
Vourlidas, Angelos; Kwon, Ryun-Young; Webb, David
Motivated by the standard flare model, ray-like structures in the wake of coronal mass ejections (CMEs) have been often interpreted as proxies of the reconnecting current sheet connecting the CME with the postflare arcade. We present the three-dimensional properties of a post-CME ray derived from white light images taken from three different viewi…