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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…
The Unusual Galactic Center Radio Source N3
Morris, M. R.; Mills, E. A. C.; Mutel, R. +4 more
Here, we report on new multi-wavelength radio observations of the unusual point source “N3” that appears to be located in the vicinity of the Galactic Center (GC). VLA observations between 2 and 50 GHz reveal that N3 is a compact and bright source (56 mJy at 10 GHz) with a non-thermal spectrum superimposed upon the non-thermal radio filaments (NTF…
Testing the Effects of Expansion on Solar Wind Turbulence
Chen, Christopher H. K.; Vech, Daniel
We present a multi-spacecraft approach to test the predictions of recent studies on the effect of solar wind expansion on the radial spectral, variance, and local 3D anisotropies of the turbulence. We found that on small scales (5000-10,000 km) the power levels of the B-trace structure functions do not depend on the sampling direction with respect…
Preferred axis of CMB parity asymmetry in the masked maps
Cheng, Cheng; Huang, Qing-Guo; Santos, Larissa +1 more
Both WMAP and Planck data show a significant odd-multipole preference in the large scales of the cosmic microwave background (CMB) temperature anisotropies. If this pattern originates from cosmological effects, then it can be considered a crucial clue for a violation in the cosmological principle. By defining various direction dependent statistics…
Suzaku follow-up of heavily obscured active galactic nuclei detected in Swift/BAT survey: NGC 1106, UGC 03752, and NGC 2788A
Tanimoto, Atsushi; Ueda, Yoshihiro; Kawamuro, Taiki +1 more
We present the broad-band (0.5-100 keV) spectra of three heavily obscured active galactic nuclei (AGNs), NGC 1106, UGC 03752, and NGC 2788A, observed with Suzaku and the Swift/Burst Alert Telescope (BAT). The targets are selected from the Swift/BAT 70-month catalog on the basis of their high hardness ratio between above and below 10 keV, and their…