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Statistical study of coronal mass ejection source locations: Understanding CMEs viewed in coronagraphs
Wang, Yuming; Shen, Chenglong; Wang, S. +3 more
How to properly understand coronal mass ejections (CMEs) viewed in white light coronagraphs is crucial to many relative researches in solar and space physics. The issue is now particularly addressed in this paper through studying the source locations of all the 1078 Large Angle and Spectrometric Coronagraph (LASCO) CMEs listed in Coordinated Data …
Off-limb Solar Coronal Wavefronts from SDO/AIA Extreme-ultraviolet Observations—Implications for Particle Production
Schwadron, N. A.; Korreck, K. E.; Lobzin, V. V. +2 more
We derive kinematic properties for two recent solar coronal transient waves observed off the western solar limb with the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) mission. The two waves occurred over ~10 minute intervals on consecutive days—2010 June 12 and 13. For the first time, off-limb waves are imaged wi…
Effects of grain size distribution on the interstellar dust mass growth
Hirashita, Hiroyuki; Kuo, Tzu-Ming
Grain growth by the accretion of metals in interstellar clouds (called 'grain growth') could be one of the dominant processes that determine the dust content in galaxies. The importance of the grain size distribution for the grain growth is demonstrated in this paper. First, we derive an analytical formula that gives the grain size distribution af…
The zCOSMOS-SINFONI Project. I. Sample Selection and Natural-seeing Observations
Lutz, D.; Daddi, E.; Förster Schreiber, N. M. +21 more
The zCOSMOS-SINFONI project is aimed at studying the physical and kinematical properties of a sample of massive z ~ 1.4-2.5 star-forming galaxies, through SINFONI near-infrared integral field spectroscopy (IFS), combined with the multiwavelength information from the zCOSMOS (COSMOS) survey. The project is based on one hour of natural-seeing observ…
Planck early results. II. The thermal performance of Planck
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +229 more
The performance of the Planck instruments in space is enabled by their low operating temperatures, 20 K for LFI and 0.1 K for HFI, achieved through a combination of passive radiative cooling and three active mechanical coolers. The scientific requirement for very broad frequency coverage led to two detector technologies with widely different tempe…
Fluid Dynamics of Stellar Jets in Real Time: Third Epoch Hubble Space Telescope Images of HH 1, HH 34, and HH 47
Hartigan, P.; Frank, A.; Foster, J. M. +6 more
We present new, third-epoch Hubble Space Telescope Hα and [S II] images of three Herbig-Haro (HH) jets (HH 1&2, HH 34, and HH 47) and compare the new images with those from previous epochs. The high spatial resolution, coupled with a time series whose cadence is of order both the hydrodynamic and radiative cooling timescales of the flow, allow…
Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs
Quirrenbach, A.; Reffert, S.
Context. The recently completed re-reduction of the Hipparcos data by van Leeuwen (2007a, Astrophysics and Space Science Library, 350) makes it possible to search for the astrometric signatures of planets and brown dwarfs known from radial velocity surveys in the improved Hipparcos intermediate astrometric data.
Aims: Our aim is to put more s…
Methane on Uranus: The case for a compact CH 4 cloud layer at low latitudes and a severe CH 4 depletion at high-latitudes based on re-analysis of Voyager occultation measurements and STIS spectroscopy
Sromovsky, L. A.; Fry, P. M.; Kim, J. H.
Lindal et al. (Lindal, G.F., Lyons, J.R., Sweetnam, D.N., Eshleman, V.R., Hinson, D.P. [1987]. J. Geophys. Res. 92 (11), 14987-15001) presented a range of temperature and methane profiles for Uranus that were consistent with 1986 Voyager radio occultation measurements of refractivity versus altitude. A localized refractivity slope variation near 1…
RCW 86: A Type Ia Supernova in a Wind-blown Bubble
Blair, William P.; Reynolds, Stephen P.; Raymond, John C. +7 more
We report results from a multi-wavelength analysis of the Galactic supernova remnant RCW 86, the proposed remnant of the supernova of 185 A.D. We show new infrared observations from the Spitzer Space Telescope and the Wide-Field Infrared Survey Explorer, where the entire shell is detected at 24 and 22 µm. We fit the infrared flux ratios with…
Discovery of a Multiply Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE Data
Pérez-Fournon, I.; Rodighiero, G.; Valtchanov, I. +88 more
We report the discovery of a bright (f(250 µm)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 µm Submillimeter Array observations resolve at least four images with a large separation of ~9''. A high-resolution adap…