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Science with Herschel: Results from the HERITAGE project
Roman-Duval, J.; Gordon, K.; Meixner, M. +2 more
The Herschel Space Observatory completed its last observation on 2013 April 29 after completing 35 000 astronomical observations resulting in numerous discoveries. In this review, we describe the capabilities and general scope of the Herschel mission. In particular, we review the science results from one of the open time key programs, the HERschel…
Local time dependences of oxygen ENA periodicities at Saturn
Mitchell, D. G.; Carbary, J. F.; Brandt, P. C.
The periodicities of energetic neutral atoms (90-170 keV oxygens) at Saturn are determined by applying Lomb-Scargle periodogram analyses to energetic neutral atom (ENA) fluxes observed in eight local time sectors of the equatorial plane between 5 and 15 RS (1 RS = 60,268 km). The analyses come from four long intervals (>18…
A phase-variable absorption feature in the X-ray spectrum of the magnetar SGR 0418+5729
Bignami, G. F.; Tiengo, A.; Götz, D. +9 more
An absorption feature, the properties of which strongly depend on the pulse phase, has been recently discovered in the X-ray spectrum of the soft gamma repeater SGR 0418+5729. If interpreted as a proton cyclotron line, its energy implies a magnetic field ranging from 2×1014 G to more than 1015 G, which confirms the magnetar i…
Revisiting the dichotomy of early-type galaxies
Hao, Cai-Na; Xia, Xiao-Yang; He, Yan-Qin
We study the relationship between isophotal shapes, central light profiles and kinematic properties of early-type galaxies (ETGs) based on a compiled sample of 184 ETGs. These sample galaxies are included in Data Release 8 of the Sloan Digital Sky Survey and have central light profiles and kinematic properties available from the literature, which …
Association of consecutive Pi2-Ps6 band pulsations with earthward fast flows in the plasma sheet in response to IMF variations
Baumjohann, Wolfgang; Cheng, Ching-Chang; Mann, Ian R.
On 11 March 2009, the H component had four consecutive bay-like variations accompanied by positive and negative deflections in the D component across the Atlantic like those affected by the substorm current wedge formation. A train of pulsations with a frequency range 2-10 mHz (referred to as Pi2-Ps6 band), sensed by Time History of Events and Mac…
Velocity of the local interstellar medium relative to the sun from interstellar helium flux measurements onboard the Ulysses and IBEX spacecraft
Katushkina, O. A.; Izmodenov, V. V.; Provornikova, E. A.
The question of determining the relative velocity of the local interstellar medium (LISM) based on direct interstellar helium flux measurements in the Solar system is considered. Such measurements were made onboard the Ulysses spacecraft in 1990-2007 at a distance of 2-5 AU from the Sun and have been made from 2009 to the present day onboard the I…
FUSE Observations of a Full Orbit of Scorpius X-1
Raymond, John; Boroson, Bram; Vrtilek, Saeqa Dil
We obtained UV spectra of X-ray binary Scorpius X-1 in the 900-1200 Å range with the Far Ultraviolet Spectroscopic Explorer over the full 0.79 day binary orbit. The strongest emission lines are the doublet of O VI at 1032,1038 Å and the C III complex at 1175 Å. The spectrum is affected by a multitude of narrow interstellar absorption lines, both a…
Characterization of lunar soils through spectral features extraction in the NIR
Mall, U.; Wöhler, C.; Grumpe, A. +2 more
Recently launched hyper-spectral instrumentation with ever-increasing data return capabilities deliver the remote-sensing data to characterize planetary soils with increased precision, thus generating the need to classify the returned data in an efficient way for further specialized analysis and detection of features of interest. This paper invest…
A surprising consistency between the far-infrared galaxy luminosity functions of the field and Coma
Ibar, E.; Peletier, R. F.; Dunne, L. +14 more
We present new deep images of the Coma Cluster from the ESA Herschel Space Observatory at wavelengths of 70, 100 and 160 µm, covering an area of 1.75 × 1.0 square degrees encompassing the core and south-west infall region. Our data display an excess of sources at flux densities above 100 mJy compared to blank-field surveys, as expected. We u…
Saturn chorus latitudinal variations
Gurnett, D. A.; Hospodarsky, G. B.; Menietti, J. D. +1 more
The variation of propagation properties of whistler mode chorus as a function of latitude is not well known at Saturn but is important for the calculation of pitch angle diffusion and nonlinear growth of chorus. The Cassini spacecraft has spent a portion of its orbital time in high-inclination orbits, allowing traversal of the magnetic equator at …