Search Publications
Spectroscopic observations and modelling of impulsive Alfvén waves along a polar coronal jet
Srivastava, A. K.; Murawski, K.; Dwivedi, B. N. +2 more
Context. The magnetic reconnection in the solar corona results in impulsively generated Alfvén waves, which drive a polar jet.
Aims: Using the Hinode/EIS 2'' spectroscopic observations, we study the intensity, velocity, and full width at half maximum (FWHM) variations of the strongest Fe XII 195.12 Å line along the jet to find the signature o…
Optical-near-IR analysis of globular clusters in the IKN dwarf spheroidal: a complex star formation history
Tudorica, A.; Georgiev, I. Y.; Chies-Santos, A. L.
Context. Age, metallicity, and spatial distribution of globular clusters (GCs) provide a powerful tool for reconstructing major star-formation episodes in galaxies. IKN is a faint dwarf spheroidal (dSph) in the M 81 group of galaxies. It contains five old GCs, which makes it the galaxy with the highest known specific frequency (SN = 126…
New XMM-Newton observation of the thermally emitting isolated neutron star 2XMM J104608.7-594306
Motch, C.; Treves, A.; Turolla, R. +3 more
Context. The isolated neutron star (INS)
The Herschel/PACS view of the Cep OB2 region: Global protoplanetary disk evolution and clumpy star formation
Fang, Min; Henning, Thomas; Currie, Thayne +7 more
Context. The Cep OB2 region, with its two intermediate-aged clusters Tr 37 and NGC 7160, is a paradigm of sequential star formation and an ideal site for studies of protoplanetary disk evolution.
Aims: We use Herschel data to study the protoplanetary disks and the star formation history of the region.
Methods: Herschel/PACS observations …
Properties and nature of Be stars. 30. Reliable physical properties of a semi-detached B9.5e+G8III binary BR CMi = HD 61273 compared to those of other well studied semi-detached emission-line binaries
Wolf, M.; Frémat, Y.; Royer, F. +13 more
Reliable determination of the basic physical properties of hot emission-line binaries with Roche-lobe filling secondaries is important for developing the theory of mass exchange in binaries. It is a very hard task, however, which is complicated by the presence of circumstellar matter in these systems. So far, only a small number of systems with ac…
Composition of inner-source heavy pickup ions at 1 AU: SOHO/CELIAS/CTOF observations. Implications for the production mechanisms
Wimmer-Schweingruber, R. F.; Berger, L.; Drews, C. +1 more
Context. Pickup ions in the inner heliosphere mainly originate in two sources, one interstellar and one in the inner solar system. In contrast to the interstellar source that is comparatively well understood, the nature of the inner source has not been clearly identified. Former results obtained with the Solar Wind Ion Composition Spectrometer on-…
Dust Impact Monitor (SESAME-DIM) measurements at comet 67P/Churyumov-Gerasimenko
Flandes, Alberto; Krüger, Harald; Loose, Alexander +9 more
Context. The Rosetta lander Philae successfully landed on the nucleus of comet 67P/Churyumov-Gerasimenko on 12 November 2014. Philae carries the Dust Impact Monitor (DIM) on board, which is part of the Surface Electric Sounding and Acoustic Monitoring Experiment (SESAME). DIM employs piezoelectric PZT sensors to detect impacts by submillimeter- an…
Solar type II radio bursts associated with CME expansions as shown by EUV waves
Selhorst, C. L.; Cunha-Silva, R. D.; Fernandes, F. C. R.
Aims: We investigate the physical conditions of the sources of two metric type II bursts associated with coronal mass ejection (CME) expansions with the aim of verifying the relationship between the shocks and the CMEs by comparing the heights of the radio sources and of the extreme-ultraviolet (EUV) waves associated with the CMEs.
Metho…
Transiting exoplanets from the CoRoT space mission. XXVII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit
Mazeh, T.; Aigrain, S.; Alonso, R. +50 more
Context. We present the discovery of two transiting extrasolar planets by the satellite CoRoT.
Aims: We aim at a characterization of the planetary bulk parameters, which allow us to further investigate the formation and evolution of the planetary systems and the main properties of the host stars.
Methods: We used the transit light curve …
High-velocity gas toward the LMC resides in the Milky Way halo
Rauch, T.; Werner, K.; de Boer, K. S. +1 more
Aims: To explore the origin of high-velocity gas in the direction of the Large Magellanic Cloud, (LMC) we analyze absorption lines in the ultraviolet spectrum of a Galactic halo star that is located in front of the LMC at d = 9.2+4.1-7.2 kpc distance.
Methods: We study the velocity-component structure of low and int…