Search Publications
X-ray analysis of the accreting supermassive black hole in the radio galaxy PKS 2251+11
Tombesi, F.; Panessa, F.; Bruni, G. +2 more
Context. We have investigated the dichotomy between jetted and non-jetted active galactic nuclei (AGNs), focusing on the fundamental differences of these two classes in the accretion physics onto the central supermassive black hole (SMBH). We tested the validity of the unification model of AGNs through the characterization of the mutual interactio…
UV core dimming in coronal streamer belt and the projection effects
Abbo, L.; Giordano, S.; Ofman, L.
During solar minimum activity, the coronal structure is dominated by a tilted streamer belt, associated with the sources of the slow solar wind. It is known that some UV coronal spectral observations show a quite evident core dimming in heavy ions emission in quiescent streamers. In this paper, our purpose is to investigate this phenomenon by comp…
Open cluster kinematics with Gaia DR2 (Corrigendum)
Castro-Ginard, A.; Jordi, C.; Casamiquela, L. +16 more
The table with clusters velocities is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/623/C2
Ultraviolet photo-ionisation in far-infrared selected sources
Curran, S. J.; Duchesne, S. W.
It has been reported that there is a deficit of stellar heated dust, as evident from the lack of far-infrared (FIR) emission, in sources within the Herschel-SPIRE sample with X-ray luminosities exceeding a critical value of LX ∼ 1037 W. Such a scenario would be consistent with the suppression of star formation by the AGN, req…
Comparative analysis of solar radio bursts before and during CME propagation
Poedts, S.; Dididze, G.; Shergelashvili, B. M. +5 more
Context. As is well known, coronal mass ejection (CME) propagation often results in the fragmentation of the solar atmosphere on smaller regions of density (magnetic field) enhancement (depletion). It is expected that this type of fragmentation may have radio signatures.
Aims: The general aim of the present paper is to perform a comparative a…
Joint cluster reconstructions. Combing free-form lensing and X-rays
Bartelmann, Matthias; Merten, Julian; Hilbert, Stefan +2 more
Context. Galaxy clusters provide a multitude of observational data across wavelengths, and their structure and morphology are of considerable interest in cosmology as well as astrophysics.
Aims: We develop a framework that allows the combination of lensing and non-lensing observations in a free-form and mesh-free approach to infer the project…
Multifrequency filter search for high redshift sources and lensing systems in Herschel-ATLAS
Bonavera, L.; Diego, J. M.; González-Nuevo, J. +2 more
We present a new catalog of high-redshift candidate Herschel sources. Our sample is obtained after applying a multifrequency filtering method ("matched multifilter"), which is designed to improve the signal-to-noise ratio of faint extragalactic point sources. The method is tested against already-detected sources from the Herschel Astrophysical Ter…
Star formation and gas in the minor merger UGC 10214
Boquien, M.; Xu, C. K.; Verley, S. +6 more
Minor mergers play a crucial role in galaxy evolution. UGC 10214 (the Tadpole galaxy) is a prime example of this process in which a dwarf galaxy has interacted with a large spiral galaxy ∼250 Myr ago and produced a perturbed disc and a giant tidal tail. We used a multi-wavelength dataset that partly consists of new observations (Hα, HI, and CO) an…
Spectrophotometric variegation of the layering in comet 67P/Churyumov-Gerasimenko as seen by OSIRIS
Lamy, P. L.; Lara, L. M.; Bertaux, J. -L. +40 more
Context. Between August 2014 and September 2016, the ESA space mission Rosetta escorted comet 67P/Churyumov-Gerasimenko (67P) during its perihelion passage. The onboard OSIRIS Narrow Angle Camera (NAC) acquired high-resolution multispectral images of the cometary surface. These datasets allowed a characterization of the spectrophotometric variegat…
Investigation of the stellar content in the IRAS 05168+3634 star-forming region
Azatyan, N. M.
Aims: We report the investigation results of the structure and content of a molecular cloud surrounding the source IRAS 05168+3634 (also known as Mol 9).
Methods: We present a photometric analysis using the data of J, H, K UKIDSS, [3.6], [4.5] µm Spitzer-IRAC and 3.4, 4.6, 12, 22 µm WISE databases. A multi-color criteria was …