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The Venus-solar wind interaction: Is it purely ionospheric?
Luhmann, J. G.; Wei, H. Y.; Zhang, T. L. +2 more
The Venus solar wind interaction is often regarded as the prototypical example of an induced magnetosphere. Pioneer Venus Orbiter (PVO) observations during a period of moderate to strong solar EUV fluxes led to a fairly detailed picture in which the currents in the conducting ionosphere produce a nearly impenetrable obstacle to the incident magnet…
Absorption of crystalline water ice in the far infrared at different temperatures
Krivov, A. V.; Löhne, T.; Mutschke, H. +2 more
The optical properties of ice in the far infrared are important for models of protoplanetary and debris disks. In this report, we derive a new set of data for the absorption (represented by the imaginary part of the refractive index κ) of crystalline water ice in this spectral range. The study includes a detailed inspection of the temperature depe…
Atmospheric Response of an Active Region to New Small Flux Emergence
Harra, L.; Green, L.; Shelton, D.
We investigate the atmospheric response to a small emerging flux region (EFR) that occurred in the positive polarity of Active Region 11236 on 23 - 24 June 2011. Data from the Solar Dynamics Observatory's Atmospheric Imaging Assembly (AIA), the Helioseismic and Magnetic Imager (HMI), and Hinode's EUV imaging spectrometer (EIS) are used to determin…
Observations of the nightside venusian hydrogen corona with SPICAV/VEX
Bertaux, J. -L.; Chaufray, J. -Y.; Leblanc, F. +2 more
Observations of the venusian hydrogen corona on the nightside (8 PM local time) have been performed with SPICAV instrument on board Venus Express from 12 to 15 October 2011. These observations were associated with interplanetary observations obtained at apoapsis to subtract the interplanetary contribution. The observed brightness variation with al…
Persistent Near-Surface Flow Structures from Local Helioseismology
van Driel-Gesztelyi, L.; Harra, L.; Baker, D. +3 more
Near-surface flows measured by the ring-diagram technique of local helioseismology show structures that persist over multiple rotations. We examine these phenomena using data from the Global Oscillation Network Group (GONG) and the Helioseismic and Magnetic Imager (HMI) and show that a correlation analysis of the structures can be used to estimate…
Small-scale magnetic and velocity inhomogeneities in a sunspot light bridge
Louis, Rohan E.
High resolution spectro-polarimetric observations of a sunspot light bridge by Hinode, reveal small-scale inhomogeneities in the magnetic field and velocity. These inhomogeneities arise as a consequence of a weak, secondary lobe in the Stokes V profile which have a polarity opposite that of the sunspot and very large (>5 km s-1) Dopp…
Halo Coronal Mass Ejections and Their Relation to DH Type-II Radio Bursts
Shanmugaraju, A.; Bendict Lawrance, M.
A set of 88 halo CMEs observed by the Solar and Heliospheric Observatory/Large Angle Solar Coronagraph (SOHO/LASCO) during the period 2005 to 2010 is considered to study the relationship of these halo CMEs with Type-II radio bursts in the deca-hectametric (DH) wavelength range observed by Wind/(Plasma and Radio Waves: WAVES). Among the 88 events, …
Morphology and structure of BzK-selected galaxies at z ∼ 2 in the CANDELS-COSMOS field
Kong, Xu; Chen, Yang; Fang, Guan-Wen +1 more
Utilizing a BzK-selection technique, we obtain 14550 star-forming galaxies (sBzKs) and 1763 passive galaxies (pBzKs) at z ∼ 2 from the K-selected (KAB < 22.5) catalog in the COSMOS/UltraVISTA field. The differential number counts of sBzKs and pBzKs are consistent with the results from the literature. Compared to the observed results,…
JEM-X/INTEGRAL X-ray survey of the galactic center region
Grebenev, S. A.; Mereminskiy, I. A.
An X-ray survey of the Galactic center region with a radius of ~20° has been performed using the data obtained with the JEM-X telescope onboard the INTEGRAL observatory over ~10 years of observations (2003-2013). The exposure at the field center directly toward the Galactic center has reached 4.8 Ms. We have constructed sky maps in the 5-10 and 10…
Constraints on the combined models with R 2 ‑ q f ( R )
Geng, Chao-Qiang; Lee, Chung-Chi; Lin, Shan
We investigate the observational constraints on the modified gravity, which combines the