Search Publications

Analysis of waves surrounding foreshock cavitons

Kajdič, Primož; Russell, Christopher T.; Blanco-Cano, Xochitl +1 more

Cavitons have been recently discovered in the Earth's foreshock. Foreshock cavitons have first been predicted by global hybrid simulations and later structures with similar properties were discovered in observational data from the Cluster mission. Cavitons are observed as simultaneous depressions of the magnitude of the magnetic field and plasma d…

First Views of a Nearby LIRG: Star Formation and Molecular Gas in IRAS 04296+2923

Meier, David S.; Turner, Jean L.; Beck, Sara C. +3 more

We present a first look at the local luminous infrared galaxy (LIRG) IRAS 04296+2923. This barred spiral galaxy, overlooked because of its location behind the Taurus molecular cloud, is among the half dozen closest (D = 29 Mpc) LIRGs. More IR-luminous than either M82 or the Antennae, it may be the best local example of a nuclear starburst caused b…

Photochemical modeling of Titan atmosphere at the ``10 percent uncertainty horizon''

Carrasco, Nathalie; Hébrard, Eric; Dobrijevic, Michel +2 more

Titan's Interior Structure

Sotin, Christophe; Rappaport, Nicole; Mitri, Giuseppe +2 more

The goal of this chapter is to give a description of Titan's interior that is consistent with the new constraints provided by the Cassini mission. As the Cassini mission proceeds into its first extended phase, the data obtained during the nominal mission suggest that Titan is at least partially differentiated. An ocean would be present some tens o…

Analyzing X-ray pulsar profiles: geometry and beam pattern of EXO 2030+375

Klochkov, D.; Santangelo, A.; Sasaki, M. +2 more

Context. The pulse profiles of the transient Be/X-ray binary EXO 2030+375 show strong dependence on energy, as well as on its luminosity state, and are asymmetric in shape.
Aims: We want to identify the emission components of the two magnetic poles in the pulsed emission to understand the geometry of the neutron star and its beam pattern.

XMM-Newton detection of two clusters of galaxies with strong SPT Sunyaev-Zel'dovich effect signatures

Finoguenov, A.; Böhringer, H.; Pratt, G. W. +9 more

We report on the discovery of two galaxy clusters, SPT-CL J2332-5358 and SPT-CL J2342-5411, in X-rays. These clusters were also independently detected through their Sunyaev-Zel'dovich effect by the South Pole Telescope, and in the optical band by the Southern Cosmology Survey. They are thus the first clusters detected under survey conditions by al…

About the Possible Role of Hydrocarbon Lakes in the Origin of Titan's Noble Gas Atmospheric Depletion

Lunine, J. I.; Cordier, D.; Mousis, O. +4 more

An unexpected feature of Titan's atmosphere is the strong depletion in primordial noble gases revealed by the Gas Chromatograph Mass Spectrometer aboard the Huygens probe during its descent on 2005 January 14. Although several plausible explanations have already been formulated, no definitive response to this issue has yet been found. Here, we inv…

Hard X-Ray Emission in the Star-Forming Region ON 2: Discovery with XMM-Newton

Gruendl, R. A.; Hamann, W. -R.; Chu, Y. -H. +3 more

We obtained X-ray XMM-Newton observations of the open cluster Berkeley 87 and the massive star-forming region (SFR) ON 2. In addition, archival infrared Spitzer Space Telescope observations were used to study the morphology of ON 2, to uncover young stellar objects, and to investigate their relationship with the X-ray sources. It is likely that th…

Expansion of magnetic flux concentrations: a comparison of Hinode SOT data and models

Solanki, S. K.; Pietarila, A.; Cameron, R.

Context. The expansion of network magnetic fields with height is a fundamental property of flux tube models. A rapid expansion is required to form a magnetic canopy.
Aims: We characterize the observed expansion properties of magnetic network elements and compare them with the thin flux tube and sheet approximations, as well as with magnetocon…

Explaining the Praesepe blue straggler HD 73666

Fossati, L.; Weiss, W.; Mochnacki, S. +1 more

Aims: The blue straggler phenomenon is not yet well explained by current theory, although evolutionary models of star clusters require a good knowledge of it. We attempt to develop a formation scenario for HD 73666, a blue straggler member of the Praesepe cluster.
Methods: We compile the known physical properties of HD 73666 found in the…