Search Publications
In-flight photometry extraction of PLATO targets. Optimal apertures for detecting extrasolar planets
Cabrera, J.; Samadi, R.; Börner, A. +7 more
Context. The ESA PLATO space mission is devoted to unveiling and characterizing new extrasolar planets and their host stars. This mission will encompass a very large (>2100 deg2) field of view, granting it the potential to survey up to one million stars depending on the final observation strategy. The telemetry budget of the spacecra…
CI Camelopardalis: The first sgB[e]-high mass X-ray binary twenty years on: A supernova imposter in our own Galaxy?
Bartlett, E. S.; Negueruela, I.; Clark, J. S.
Context. The Galactic supergiant B[e] star CI Camelopardalis (CI Cam) was the first sgB[e] star detected during an X-ray outburst. The star brightened to ∼2 Crab in the X-ray regime (∼5 × 10-8 ergs cm-2 s-1 in the 2-25 keV range) within hours before decaying to a quiescent level in less than two weeks, clearly indi…
RPC-MIP observations at comet 67P/Churyumov-Gerasimenko explained by a model including a sheath and two populations of electrons
Henri, P.; Vallières, X.; Wattieaux, G. +2 more
The response of the mutual impedance probe RPC-MIP on board Rosetta orbiter electrostatically modeled considering an unmagnetized and collisionless plasma with two Maxwellian electron populations. A vacuum sheath surrounding the probe was considered in our model in order to take the ion sheath into account that is located around the probe, which i…
Superstrong photospheric magnetic fields in sunspot penumbrae
Solanki, S. K.; Lagg, A.; van Noort, M. +2 more
Context. Recently, there have been some reports of unusually strong photospheric magnetic fields (which can reach values of over 7 kG) inferred from Hinode SOT/SP sunspot observations within penumbral regions. These superstrong penumbral fields are even larger than the strongest umbral fields on record and appear to be associated with supersonic d…
Deriving star cluster parameters with convolutional neural networks. I. Age, mass, and size
Narbutis, D.; Vansevičius, V.; Bialopetravičius, J.
Context. Convolutional neural networks (CNNs) have been proven to perform fast classification and detection on natural images and have the potential to infer astrophysical parameters on the exponentially increasing amount of sky-survey imaging data. The inference pipeline can be trained either from real human-annotated data or simulated mock obser…
The spectacular cluster chain Abell 781 as observed with LOFAR, GMRT, and XMM-Newton
Brunetti, G.; Shimwell, T. W.; Gastaldello, F. +20 more
Context. A number of merging galaxy clusters show the presence of large-scale radio emission associated with the intra-cluster medium (ICM). These synchrotron sources are generally classified as radio haloes and radio relics.
Aims: Whilst it is commonly accepted that mergers play a crucial role in the formation of radio haloes and relics, not…
Scattering, absorption, and thermal emission by large cometary dust particles: Synoptic numerical solution
Agarwal, Jessica; Markkanen, Johannes
Context. Remote light scattering and thermal infrared observations provide clues about the physical properties of cometary and interplanetary dust particles. Identifying these properties will lead to a better understanding of the formation and evolution of the Solar System.
Aims: We present a numerical solution for the radiative and conductiv…
Venus Express radio occultation observed by PRIDE
Wang, W.; Zheng, W.; Bocanegra-Bahamón, T. M. +18 more
Context. Radio occultation is a technique used to study planetary atmospheres by means of the refraction and absorption of a spacecraft carrier signal through the atmosphere of the celestial body of interest, as detected from a ground station on Earth. This technique is usually employed by the deep space tracking and communication facilities (e.g.…
Gaia DR2 orbital properties for field stars with globular cluster-like CN band strengths
Posti, L.; Savino, A.
Context. Large spectroscopic surveys of the Milky Way have revealed that a small population of stars in the halo have light element abundances comparable to those found in globular clusters. The favoured explanation for the peculiar abundances of these stars is that they originated inside a globular cluster and were subsequently lost.
Aims: U…
ALMA observations of the "fresh" carbon-rich AGB star TX Piscium. The discovery of an elliptical detached shell
Olofsson, H.; Mecina, M.; Kerschbaum, F. +4 more
Aims: The carbon-rich asymptotic giant branch (AGB) star TX Piscium (TX Psc) has been observed multiple times during multiple epochs and at different wavelengths and resolutions, showing a complex molecular CO line profile and a ring-like structure in thermal dust emission. We investigate the molecular counterpart in high resolution, aiming t…