Search Publications
Using Weak-Lensing Dilution to Measure Light Properties of A1689
Broadhurst, Tom; Coe, Dan; Umetsu, Keiichi +1 more
Weak-lensing induced by clusters of galaxies can probe the total mass distribution out to the virial radius of the cluster, regardless of the nature of the mass or its dynamical state. To make a robust analysis, the cluster and background galaxy populations need to be separated. The E/S0 sequence of a cluster defines a boundary redward of which a …
Mars Express/ASPERA-3/NPI and IMAGE/LENA observations of energetic neutral atoms in Earth and Mars orbit
Barabash, S.; Holmström, M.; Brinkfeldt, K. +3 more
The low energy neutral atom imagers on Mars Express and IMAGE have revealed that the neutral atom populations in interplanetary space come from a variety of sources and challenge our current understanding of heliospheric physics. For example, both in cruise phase and at Mars, the neutral particle instrument NPD on Mars Express observed “unexplaine…
Time-Resolved FUSE Spectroscopy of the LMC WC + O Binaries Br 22 and Br 32
Moffat, Anthony F. J.; St-Louis, Nicole; Marchenko, Sergey V. +1 more
Using the Far Ultraviolet Spectroscopic Explorer satellite, we obtained series of spectra for two of the three known WC + O binaries in the LMC, Br 22, and Br 32 (HD 36521). Compared to Br 22, we detect a higher ratio of C IV to He II lines in Br 32, which could indicate a more advanced evolutionary stage for the latter. The orbit of the O star in…
The coronal dynamics imagers for the KuaFu mission
Lamy, P.; Rousset, G.; Vives, S. +1 more
The Space Weather Explorer - KuaFu mission will provide simultaneous, long-term, and synoptic observations of the complete chain of disturbances from the solar atmosphere to the geospace. KuaFu-A (located at the L1 liberation point) includes Coronal Dynamics Imagers composed of a Lyman-α coronagraph (from 1.15 to 2.7 solar radii) and a white light…
Evolution of galaxy cluster scaling from XMM-Newton observation of the galaxy clusters at z ⩾ 0.4
Anokhin, S. G.
We present here new XMM-Newton observations of 3 relatively cool clusters at z ≈ 0.4, complemented by archival observations of 3 other clusters at similar redshift. We derived the M- T and R- T relations from the hydrostatic equation using an isothermal temperature distribution.
Observations of Multiple X Lines Collisionless Reconnection in the Near Earth-Tail
Tang, Chao-Ling; Li, Zhong-Yuan; Wang, Rong-Shen
Observations of the Earth's magnetotail made by the Cluster II during 09:42 09:50 UT on October 1 2001 are presented. Two tailward magnetic flux ropes bounded by earthward and tailward convective high speed flows were observed. We directly detected the source of tailward high flow and the outflow region of earthward flow. Combining the observation…
High spectral resolution X-ray observations of AGN
Kaastra, J. S.
A brief overview of some highlights of high spectral resolution X-ray observations of AGN is given, mainly obtained with the RGS of XMM-Newton. Future prospects for such observations with XMM-Newton are given.
Observations of the December 2006 Particle Events at High Latitudes with the KET aboard Ulysses
Malandraki, O.; Heber, B.; Gomez-Herrero, R. +8 more
An unexpected rise of solar activity close to its minimum in December 2006 resulted in four X-class flares and four energetic particle events. These events were observed close to Earth and above 70 degree South by the Ulysses spacecraft, which was at a heliocentric distance of 2.8 AU at that time. Three out of these four events produced significan…
Young stellar populations in the Magellanic Clouds .
Vallenari, A.
We discuss the young population of stars and clusters in the Magellanic Clouds. We present the discovery of pre-main sequence candidates in the nebula N 11 in the Large Magellanic Clouds. The comparison of the Colour-Magnitude diagram with pre-main sequence tracks and the presence of Spitzer objects YSO I and II suggest that the star formation has…
Ice Emission and the Redshifts of Submillimeter Sources
Maloney, P. R.; Imanishi, M.; Dudley, C. C.
Observations at submillimeter wavelengths have revealed a population of sources thought to be at relatively large redshifts. The position of the 850 µm passband on the Rayleigh-Jeans portion of the Planck function leads to a maximum redshift estimate of z ~ 4.5, since sources will not retain their redshift-independent brightness close to the…