Search Publications
Searching for springtime zonal liquid interfacial water on Mars
Kereszturi, Akos; Appéré, Thomas
We analyzed the spatial and temporal characteristics of the surface temperature at the northern water ice annulus on Mars that is left behind the receding seasonal carbon dioxide cap in springtime. Using OMEGA hyperspectral images we show that water ice without carbon dioxide ice coverage lasts for 10-30 days between 55° and 70°N. The longest wate…
Relation between the X-ray and optical luminosities in binary systems with accreting nonmagnetic white dwarfs
Revnivtsev, M. G.; Suleimanov, V. F.; Filippova, E. V.
We investigate the relation between the optical ( g-band) and X-ray (0.5-10 keV) luminosities of accreting nonmagnetic white dwarfs. According to the present-day counts of the populations of star systems in our Galaxy, these systems have the highest space density among the close binary systems with white dwarfs. We show that the dependence of the …
PRISM: Recovery of the primordial spectrum from Planck data
Starck, J. -L.; Sureau, F.; Bobin, J. +3 more
Aims: The primordial power spectrum describes the initial perturbations that seeded the large-scale structure we observe today. It provides an indirect probe of inflation or other structure-formation mechanisms. In this Letter, we recover the primordial power spectrum from the Planck PR1 dataset, using our recently published algorithm PRISM. …
In situ observations of density cavities extending above the auroral acceleration region
Karlsson, T.; Marklund, G. T.; Alm, L.
The uppermost part of a stable potential structure in the auroral acceleration region was studied using simultaneous observations of Cluster satellites C1 and C3. Both satellites observe a monotonically decreasing electron density as they ascend through the auroral acceleration region. As C1 exits the top of the auroral acceleration region, the el…
Erratum: "Joint Analysis of Cluster Observations. II. Chandra/XMM-Newton X-Ray and Weak Lensing Scaling Relations for a Sample of 50 Rich Clusters of Galaxies" (2013, ApJ, 767, 116)
Hoekstra, Henk; Babul, Arif; Mahdavi, Andisheh +3 more
Physical Nature of the [S II]-bright Shell Nebulae N70 and N185
Gruendl, R. A.; Chu, You-Hua; Chen, Yang +3 more
N70 and N185 are two large (>=100 pc in diameter) shell nebulae in the Large Magellanic Cloud (LMC). Their high [S II]/Hα ratios rival those of supernova remnants (SNRs), but they are not confirmed as SNRs. To study their physical nature, we have obtained XMM-Newton X-ray observations and high-dispersion long-slit echelle spectroscopic observat…
Evidence of transient reconnection in the outflow jet of primary reconnection site
Fazakerley, A. N.; Nakamura, R.; Baumjohann, W. +4 more
The precise mechanism for the formation of magnetic islands in the magnetotail and the subsequent evolution are still controversial. New investigations have provided the first observational evidence of secondary reconnection in the earthward outflow jet of primary reconnection in the magnetotail. The secondary reconnection takes place 38 c/ωp…
A Full-Sun Magnetic Index from Helioseismology Inferences
Hill, F.; Pérez Hernández, F.; Braun, D. C. +4 more
Solar magnetic indices are used to model the solar irradiance and ultimately to forecast it. However, the observation of such indices is generally limited to the Earth-facing hemisphere of the Sun. Seismic maps of the far side of the Sun have proven their capability to locate and track medium-large active regions at the non-visible hemisphere. We …
Star-forming galactic contrails as a source of metal enrichment and ionizing radiation at high redshift
Rauch, Michael; Haehnelt, Martin G.; Becker, George D. +1 more
A spectroscopically detected Lyman α emitting halo at redshift 3.216 in the GOODS-N field is found to reside at the convergence of several line-emitting filaments. Spatially extended emission apparently by He II 1640 Å and several metal transitions is seen within several arcseconds from the position of the central galaxy. The V = 24.9 galaxy mainl…
Comparison of interplanetary CME arrival times and solar wind parameters based on the WSA-ENLIL model with three cone types and observations
Moon, Y. -J.; Jang, Soojeong; Na, Hyeonock +1 more
We have made a comparison between coronal mass ejection (CME)-associated shock propagations based on the Wang-Sheeley-Arge (WSA)-ENLIL model using three cone types and in situ observations. For this we use 28 full-halo CMEs, whose cone parameters are determined and their corresponding interplanetary shocks were observed at the Earth, from 2001 to …