Search Publications

The Interstellar Heliopause Probe/Heliospheric Explorer: IHP/HEX

Wimmer-Schweingruber, Robert F.; McNutt, Ralph L.

The Sun, driving a supersonic solar wind, cuts out of the local interstellar medium a giant plasma bubble, the heliosphere. Dedicated deep-space missions have greatly enhanced our understanding of our immediate neighborhood. Ulysses is the only spacecraft exploring the third, out-of-ecliptic dimension, while SOHO has allowed us to better understan…

Geometry of Coronal Mass Ejections in the Context of Recent Solar Cycle

Mishra, Rajesh K.; Agarwal, Rekha

Coronal mass ejections (CMEs) disrupt the flow of the solar wind and produce disturbances that strike the Earth with sometimes catastrophic results. These ejections are often associated with solar flares and prominence eruptions, but they can also occur in the absence of either of these processes. The frequency of CMEs varies with the sunspot cycl…

INTEGRAL long-term monitoring results on persistently bright NS LMXBs

Kuulkers, E.; Farinelli, R.; Paizis, A. +3 more

We present long-term spectral and timing results from an INTEGRAL monitoring program of persistently bright neutron star Low-Mass X-ray Binaries, i.e. the three bright Atoll sources GX 3+1, GX 9+1 and GX 9+9, and the Z sources GX 5-1, GX 17+2, GX 340+0 and GX 349+2. From the available observing periods between 2003 and 2009, each lasting ~2 months…

Observational results from active region seismology

González Hernández, I.

Active regions are one of the most observed features in the solar surface. High-resolution solar telescopes on ground and space have revealed the fine configuration of umbra and penumbra of sunspots with amazing detail. However, the subsurface structure of sunspots and active regions remains, for the most part, unknown. Thanks to the development o…

Infrared limb sounding of Titan with the Cassini Composite InfraRed Spectrometer: effects of the mid-IR detector spatial responses: errata

Nixon, Conor A.; Irwin, Patrick G. J.; Flasar, F. Michael +8 more

Spectral Observations of AB Aur

Ismailov, N. Z.; Khalilov, O. V.

Results of spectral observations of the Herbig Ae/Be type star AB Aur carried out for 2008 - 2009 in SHAO were presented. The absorption component of the Hα line has a negative variable dis placement on different dates, reaching -300 km/s. To this absorption component superimposed an emission peak, which is rather unstable and can disappear com pl…

The Young Stellar Population of the Nearby Late-type Galaxy NGC 1311

Windhorst, Rogier A.; Eskridge, Paul B.; Jansen, Rolf A. +1 more

We have extracted point-spread-function-fitted stellar photometry from near-ultraviolet, optical, and near-infrared images, obtained with the Hubble Space Telescope, of the nearby (D ≈ 5.5 Mpc) SBm galaxy NGC 1311. The ultraviolet and optical data reveal a population of hot main-sequence (MS) stars with ages of 2-10 Myr. We also find populations o…

Acceleration of >40 keV Electrons in Near-Earth Magnetotail Reconnection Events

Taylor, M. G. G. T.; Åsnes, A.; Borg, A. L.

Reconnection of magnetic field lines have been invoked as an acceleration mechanism producing significant amounts of super-thermal electrons in the high energy range. However, in a recent paper by Åsnes et al., 2008, energetic particle generation during geomagnetic active times was shown to be mainly caused by plasma sheet heating rather than reco…

Planetary science: The birth of Saturn's baby moons

Burns, Joseph A.

Simulations show that Saturn's nearby moons, after forming on the outskirts of the planet's main rings, get pushed clear of them. This model reproduces the moons' orbital locations and remarkably low densities.

The INTEGRAL Complete Sample of Type 1 AGN

Molina, M.

We present the average properties of a complete sample of 36 type 1 AGN, detected by INTEGRAL in the 20-40 keV band. We discuss the distribution of photon indices, high-energy cut-offs, reflection fractions and absorption properties and analyse their parameter space. We also investigate how our results fit into current frameworks for AGN spectral …