Search Publications
Tracing the sites of obscured star formation in the Antennae galaxies with Herschel-PACS
Krause, O.; Klaas, U.; Haas, M. +2 more
Aims: FIR imaging of interacting galaxies allows locating even hidden sites of star formation and measuring of the relative strength of nuclear and extra-nuclear star formation. We want to resolve the star-forming sites in the nearby system of the Antennae.
Methods: Thanks to the unprecedented sharpness and depth of the PACS camera onboa…
Magnetospheric period oscillations of Saturn's bow shock
Coates, A. J.; Masters, A.; Andrews, D. J. +2 more
Using magnetic field and plasma electron data from 35 Cassini orbits on which the spacecraft crossed Saturn's magnetopause and bow shock during 2004-2007, we provide first evidence for bow shock oscillations related to oscillations in the magnetic field and plasma inside the magnetosphere near the ∼11 h planetary rotation period, termed here the “…
Time Variability of the Geocoronal Solar-Wind Charge Exchange in the Direction of the Celestial Equator
Miyoshi, Yoshizumi; Ezoe, Yuichiro; Mitsuda, Kazuhisa +5 more
We report on the detection of a time variable OVII line emission in a deep 100 ks Suzaku X-ray Imaging Spectrometer spectrum of the galactic ridge X-ray emission. The observed line intensity is too strong (11 ± 2 line unit or photon cm-2 s-1 sr-1) to be emitted inside the heavily obscured galactic disk. It showed a…
Observations and modeling of the dust emission from the H2-bright galaxy-wide shock in Stephan's Quintet
Boulanger, F.; Appleton, P. N.; Guillard, P. +3 more
Context. Spitzer Space Telescope observations have detected powerful mid-infrared (mid-IR) H2 rotational line emission from the X-ray emitting large-scale shock (~15 × 35 kpc2) associated with a galaxy collision in Stephan's Quintet (SQ). Because H2 forms on dust grains, the presence of H2 is physically …
Morphologic, stratigraphic and morphometric investigations of valley networks in eastern Libya Montes, Mars: Implications for the Noachian/Hesperian climate change
Jaumann, R.; Hiesinger, H.; Erkeling, G. +1 more
"Dendritic valley networks" and broad "longitudinal valleys" are widespread within the eastern Libya Montes region. The morphologic characteristics of the studied dendritic valleys, especially their occurrence at local summits, provide evidence for the initial formation by surface runoff due to atmospheric precipitation whereas the longitudinal va…
Small-scale structure in the Rosette molecular cloud revealed by Herschel
Olofsson, G.; Abergel, A.; André, Ph. +40 more
We present a preliminary analysis of the small-scale structure found in new 70-520 µm continuum maps of the Rosette molecular cloud (RMC), obtained with the SPIRE and PACS instruments of the Herschel Space Observatory. We find 473 clumps within the RMC using a new structure identification algorithm, with sizes up to ~1.0 pc in diameter. A co…
Detections of CO Molecular Gas in 24 µm Bright ULIRGs at z ~ 2 in the Spitzer First Look Survey
Lutz, D.; Tacconi, L. J.; Omont, A. +7 more
We present CO observations of nine ultra-luminous infrared galaxies (ULIRGs) at z ~ 2 with f ν(24 µm) gsim 1 mJy, previously confirmed with the mid-IR spectra in the Spitzer First Look Survey. All targets are required to have accurate redshifts from Keck/GEMINI near-IR spectra. Using the Plateau de Bure millimeter-wave Interferome…
A sensitivity study of the Enceladus torus
Delamere, P. A.; Bagenal, F.; Fleshman, B. L.
We have developed a homogeneous model of physical chemistry to investigate the neutral-dominated, water-based Enceladus torus. Electrons are treated as the summation of two isotropic Maxwellian distributions: a thermal component and a hot component. The effects of electron impact, electron recombination, charge exchange, and photochemistry are inc…
Multiwavelength properties of a new Geminga-like pulsar: PSRJ2021+4026
Cheng, K. S.; Takata, J.; Wang, Y. +4 more
In this paper, we report on a detailed investigation of the multiwavelength properties of a newly detected γ-ray pulsar, PSRJ2021+4026, in both observational and theoretical aspects. We first identify an X-ray source in the XMM-Newton serendipitous source catalogue, 2XMMJ202131.0+402645, located within the 95 per cent confidence circle of PSRJ2021…
A new type of small-scale downflow patches in sunspot penumbrae
Katsukawa, Y.; Jurčák, J.
Context. Magnetic and flow structures in a sunspot penumbra are created by strong interplay between inclined magnetic fields and photospheric convection. They exhibit a complex nature that cannot always be explained by the well-known Evershed flow.
Aims: A sunspot penumbra is observationally examined to reveal properties of small-scale flow s…