Search Publications
Variability of the symbiotic X-ray binary GX 1+4. Enhanced activity near periastron passage
Iłkiewicz, Krystian; Mikołajewska, Joanna; Monard, Berto
Context. GX 1+4 belongs to a rare class of X-ray binaries with red giant donors, symbiotic X-ray binaries. It has a history of complicated variability on multiple timescales in the optical light and X-rays. The nature of this variability remains poorly understood.
Aims: We aim to study variability of GX 1+4 on long timescale in X-ray and opti…
Structure and dynamics of the molecular gas in M 2-9: a follow-up study with ALMA
Sánchez Contreras, C.; Alcolea, J.; Santander-García, M. +4 more
Context. M 2-9 is a young planetary nebula (PN) that shows the characteristics of its last ejections in unprecedented detail. These last ejections are thought to trigger the post-asymptotic giant branch evolution.
Aims: To assemble an overall picture of how M 2-9 was shaped, we analyzed the characteristics of the different molecular gas compo…
Interferometric evidence for quantum heated particles in the inner region of protoplanetary disks around Herbig stars
Waters, L. B. F. M.; Dominik, C.; Benisty, M. +6 more
Context. To understand the chemical composition of planets, it is important to know the chemical composition of the region where they form in protoplanetary disks. Because of its fundamental role in chemical and biological processes, carbon is a key element to trace.
Aims: We identify the carriers and processes behind the extended near-infrar…
Opposition effect on comet 67P/Churyumov-Gerasimenko using Rosetta-OSIRIS images
Jorda, L.; Lamy, P. L.; Lara, L. M. +46 more
Aims: We aim to explore the behavior of the opposition effect as an important tool in optical remote sensing on the nucleus of comet 67P/ Churyumov-Gerasimenko (67P), using Rosetta-OSIRIS images acquired in different filters during the approach phase, July-August 2014 and the close flyby images on 14 of February 2015, which contain the spacec…
The spatially resolved stellar population and ionized gas properties in the merger LIRG NGC 2623
Villar-Martín, M.; Roth, M. M.; González Delgado, R. M. +10 more
We report on a detailed study of the stellar populations and ionized gas properties in the merger LIRG NGC 2623, analyzing optical integral field spectroscopy from the CALIFA survey and PMAS LArr, multiwavelength HST imaging, and OSIRIS narrow band Hα and [NII]λ6584 imaging. The spectra were processed with the starlight full spectral fitting code,…
Comparing UV/EUV line parameters and magnetic field in a quiescent prominence with tornadoes
Fletcher, L.; Schmieder, B.; Labrosse, N. +2 more
Context. Understanding the relationship between plasma and the magnetic field is important for describing and explaining the observed dynamics of solar prominences.
Aims: We determine if a close relationship can be found between plasma and magnetic field parameters, measured at high resolution in a well-observed prominence.
Methods: A pr…
Antisolar differential rotation with surface lithium enrichment on the single K-giant V1192 Orionis
Strassmeier, K. G.; Weber, M.; Granzer, T. +7 more
Context. Stars with about 1-2 solar masses at the red giant branch (RGB) represent an intriguing period of stellar evolution, I.e. when the convective envelope interacts with the fast-rotating core. During these mixing episodes freshly synthesized lithium can come up to the stellar surface along with high angular momentum material. This high angul…
XMM-Newton observations of the non-thermal supernova remnant HESS J1731-347 (G353.6-0.7)
Klochkov, D.; Santangelo, A.; Pühlhofer, G. +4 more
We report on the analysis of XMM-Newton observations of the non-thermal shell-type supernova remnant HESS J1731-347 (G353.6-0.7). For the first time the complete remnant shell has been covered in X-rays, which allowed direct comparison with radio and TeV observations. We carried out a spatially resolved spectral analysis of XMM-Newton data and con…
Gaia TGAS search for Large Magellanic Cloud runaway supergiant stars. Candidate hypervelocity star discovery and the nature of R 71
van der Marel, Roeland P.; Lennon, Daniel J.; Sahlmann, Johannes +2 more
Aims: Our research aims to search for runaway stars in the Large Magellanic Cloud (LMC) among the bright Hipparcos supergiant stars included in the Gaia DR1 Tycho-Gaia astrometric solution (TGAS) catalogue.
Methods: We compute the space velocities of the visually brightest stars in the Large Magellanic Cloud that are included in the TGAS…
First detection of the 448 GHz H2O transition in space
Rigopoulou, D.; Colina, L.; Martín-Pintado, J. +9 more
We present the first detection of the ortho-H2O 423 - 330 transition at 448 GHz in space. We observed this transition in the local (z = 0.010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama Large Millimeter/submillimeter Array (ALMA). The water 423 - 330 emissi…