Search Publications

Bidirectional Fluxes of Nearly Relativistic Electrons During the Onset of Solar Energetic Particle Events

Li, C.; Sun, L. P.

We report intensity and anisotropy measurements of energetic electrons in the energy range of ~27-~500 keV as observed with the Wind and Advanced Composition Explorer (ACE) spacecraft in 2000 June for several solar energetic particle (SEP) events. The solar sources of the SEP events are inferred from observations from the Solar and Heliospheric Ob…

Analysis of a State Changing Supersoft X-Ray Source in M31

Nelson, T.; Patel, B.; Di Stefano, R. +3 more

We report on observations of a luminous supersoft X-ray source (SSS) in M31, r1-25, that has exhibited spectral changes to harder X-ray states. We document these spectral changes. In addition, we show that they have important implications for modeling the source. Quasisoft states in a source that has been observed as an SSS represent a newly disco…

Missing Lensed Images and the Galaxy Disk Mass in CXOCY J220132.8-320144

Schechter, Paul L.; Maza, José; Chen, Jacqueline +2 more

The CXOCY J220132.8-320144 system consists of an edge-on spiral galaxy lensing a background quasar into two bright images. Previous efforts to constrain the mass distribution in the galaxy have suggested that at least one additional image must be present. These extra images may be hidden behind the disk which features a prominent dust lane. We pre…

Erratum: "Discovery of a Giant Radio Halo in a New Planck Galaxy Cluster PLCKG171.9-40.7" (2013, ApJ, 766, 18)

Wik, Daniel R.; Giacintucci, Simona; Venturi, Tiziana +2 more

The Onset of Differentiation and Internal Evolution: The Case of 21 Lutetia

Capaccioni, F.; De Sanctis, M. C.; Turrini, D. +2 more

Asteroid 21 Lutetia, seen by the Rosetta spacecraft, plays a crucial role in the reconstruction of primordial phases of planetary objects. Its high bulk density and its primitive chondritic crust suggest that Lutetia could be partially differentiated. We developed a numerical code, also used for studying the geophysical history of Vesta, to explor…