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A statistical comparison of solar wind propagation delays derived from multispacecraft techniques
Wild, J. A.; Case, N. A.
We present a large-scale statistical study of the solar wind propagation delay between NASA's Advanced Composition Explorer spacecraft and ESA's Cluster 1 spacecraft. This study focuses on those periods when Cluster was within the unimpeded solar wind, upstream of the bow shock nose, between 2001 and 2010. Using a cross-correlation method to compa…
A KS and IRAC Selection of High-redshift Extremely Red Objects
Wang, Wei-Hao; Cowie, Lennox L.; Barger, Amy J.
In order to find the most extreme dust-hidden high-redshift galaxies, we select 196 extremely red objects in the KS and Infrared Array Camera (IRAC) bands (KIEROs, [Ks - 4.5 µm]AB > 1.6) in the 0.06 deg2 Great Observatories Origins Deep Surveys-North (GOODS-N) region. This selection avoids the B…
Herschel-PACS observations of [O I]63 µm towards submillimetre galaxies at z ∼ 1
Ivison, R. J.; Menten, K. M.; Smail, Ian +22 more
We present Herschel-PACS spectroscopy of the [O I]63 µm far-infrared cooling line from a sample of six unlensed and spectroscopically confirmed 870 µm selected submillimetre (submm) galaxies (SMGs) at 1.1 < z < 1.6 from the LABOCA Extended Chandra Deep Field South (ECDFS) Submm Survey (LESS). This is the first survey of [O I]63 &…
Spectroscopic Observations of Fe XVIII in Solar Active Regions
Teriaca, Luca; Warren, Harry P.; Curdt, Werner
The large uncertainties associated with measuring the amount of high temperature emission in solar active regions (ARs) represents a significant impediment to making progress on the coronal heating problem. Most current observations at temperatures of 3 MK and above are taken with broadband soft X-ray instruments. Such measurements have proven dif…
Timing and broad-band spectroscopy of 1A 1118-61 with Suzaku
Maitra, Chandreyee; Paul, Biswajit; Naik, Sachindra
We present a timing and broad-band pulse-phase-resolved spectral analysis of the transient Be X-ray binary pulsar 1A 1118-61 observed during its outburst in 2009 January using Suzaku observations. The Suzaku observations were made twice, once at the peak of the outburst, and the other 13 d later at its declining phase. Pulse profiles from both obs…
The 21 cm "Outer Arm" and the Outer-galaxy High-velocity Clouds: Connected by Kinematics, Metallicity, and Distance
Tripp, Todd M.; Song, Limin
Using high-resolution ultraviolet spectra obtained with the Hubble Space Telescope Space Telescope Imaging Spectrograph and the Far Ultraviolet Spectroscopic Explorer, we study the metallicity, kinematics, and distance of the gaseous "outer arm" (OA) and the high-velocity clouds (HVCs) in the outer Galaxy. We detect the OA in a variety of absorpti…
Periglacial mass-wasting landforms on Mars suggestive of transient liquid water in the recent past: Insights from solifluction lobes on Svalbard
Hiesinger, H.; Hauber, E.; Johnsson, A. +4 more
On Earth, periglacial solifluction is a slow mass-wasting process related to freeze-thaw activity. We compare the morphology of small-scale lobate features on Mars to solifluction lobes in Svalbard to constrain their processes of formation. The analysis is based on high-resolution satellite imagery of Mars (HiRISE, ∼25 cm/pxl), aerial images of Sv…
Modelling a high-mass red giant observed by CoRoT
Auvergne, M.; Baudin, F.; Michel, E. +15 more
Context. The advent of space-borne photometers such as CoRoT and Kepler has opened up new fields in asteroseismology. This is especially true for red giants as only a few of these stars were known to oscillate with small amplitude, solar-like oscillations before the launch of CoRoT.
Aims: The G6 giant HR 2582 (HD 50890) was observed by CoRoT …
Dynamic Martian magnetosphere: Transient twist induced by a rotation of the IMF
Dubinin, E.; Modolo, R.; Chanteur, G. M.
Simulation studies of the Martian environment are usually restricted to stationary situations under various steady conditions of the solar wind and solar radiation. Dynamic transients and their implications have so far attracted little attention although global simulation models can provide valuable insights to understand disagreements between sim…
GNSS measurement of EUV photons flux rate during strong and mid solar flares
Hernández-Pajares, M.; García-Rigo, A.; Juan, J. M. +3 more
A new GNSS Solar Flare Activity Indicator (GSFLAI) is presented, given by the gradient of the ionospheric Vertical Total Electron Content (VTEC) rate, in terms of the solar-zenithal angle, measured from a global network of dual-frequency GPS receivers. It is highly correlated with the Extreme Ultraviolet (EUV) photons flux rate at the 26-34 nm spe…