Search Publications
Characteristics of polar coronal hole jets
Teriaca, L.; Gupta, G. R.; Bemporad, A. +2 more
Context. High spatial- and temporal-resolution images of coronal hole regions show a dynamical environment where mass flows and jets are frequently observed. These jets are believed to be important for the coronal heating and the acceleration of the fast solar wind.
Aims: We studied the dynamics of two jets seen in a polar coronal hole with a…
Dynamical star-disk interaction in the young stellar system V354 Monocerotis
Bouvier, J.; Favata, F.; Alencar, S. H. P. +2 more
Aims: The main goal of this work is to characterize the mass accretion and ejection processes of the classical T Tauri star
Methods: In March 2008, photometric and spectroscopic observations of
Water distribution in shocked regions of the NGC 1333-IRAS 4A protostellar outflow
Liseau, R.; Codella, C.; van Dishoeck, E. F. +11 more
Context. Water is a key molecule in protostellar environments because its line emission is very sensitive to both the chemistry and the physical conditions of the gas. Observations of H2O line emission from low-mass protostars and their associated outflows performed with HIFI onboard the Herschel Space Observatory have highlighted the c…
The VISTA Carina Nebula Survey . I. Introduction and source catalog
Preibisch, T.; Roccatagliata, V.; Ratzka, T. +2 more
Context. The Carina Nebula is one of the most massive and active star-forming regions in our Galaxy and has been studied with numerous multiwavelength observations in the past five years. However, most of these studies were restricted to the inner parts (≲1 square-degree) of the nebula, and thus covered only a small fraction of the whole cloud com…
The molecular circumnuclear disk (CND) in Centaurus A. A multi-transition CO and [CI] survey with Herschel, APEX, JCMT, and SEST
Weiss, A.; van der Werf, P.; Stutzki, J. +8 more
This paper presents emission line intensities of CO and C° from the compact circumnuclear disk in the center of NGC 5128 (Centaurus A) obtained with the Herschel Space Observatory in the 400-1000 GHz range as well as previously unpublished measurements obtained with the ground-based observatories SEST, JCMT and APEX in the 90-800 GHz range. The re…
Searches for HCl and HF in comets 103P/Hartley 2 and C/2009 P1 (Garradd) with the Herschel Space Observatory
Küppers, M.; Hartogh, P.; de Graauw, T. +20 more
Context. Hydrogen chloride (HCl) and hydrogen fluoride (HF) are expected to be the main reservoirs of fluorine and chlorine over a wide range of conditions, wherever hydrogen is predominantly molecular. They are found to be strongly depleted in dense molecular clouds, suggesting freeze-out onto grains in such cold environments. We can then expect …
Horizontal flow fields observed in Hinode G-band images. IV. Statistical properties of the dynamical environment around pores
Verma, M.; Denker, C.
Context. Solar pores are penumbra-lacking magnetic features, that mark two important transitions in the spectrum of magnetohydrodynamic processes: (1) the magnetic field becomes sufficiently strong to suppress the convective energy transport and (2) at some critical point some pores develop a penumbra and become sunspots.
Aims: The purpose of…
Observations and analysis of phase scintillation of spacecraft signal on the interplanetary plasma
Bocanegra-Bahamón, T. M.; Molera Calvés, G.; Duev, D. A. +13 more
Aims: The phase scintillation of the European Space Agency's Venus Express (VEX) spacecraft telemetry signal was observed at X-band (λ = 3.6 cm) with a number of radio telescopes of the European Very Long Baseline Interferometry (VLBI) Network in the period 2009-2013.
Methods: We found a phase fluctuation spectrum along the Venus orbit w…
The globular cluster system of NGC 1316. III. Kinematic complexity
Hilker, M.; Gómez, M.; Dirsch, B. +3 more
Context. The merger remnant NGC 1316 (Fornax A) is one of the most important objects regarding the investigation of and thus an important object to study merger-related processes. A recent photometric study used globular clusters in NGC 1316 to constrain its star formation history, but without the knowledge of individual radial velocities. The kin…
Fueling the central engine of radio galaxies. III. Molecular gas and star formation efficiency of 3C 293
Combes, F.; García-Burillo, S.; Neri, R. +6 more
Context. Powerful radio galaxies show evidence of ongoing active galactic nuclei (AGN) feedback, mainly in the form of fast, massive outflows. But it is not clear how these outflows affect the star formation of their hosts.
Aims: We investigate the different manifestations of AGN feedback in the evolved, powerful radio source