Search Publications
Evidence of ram-pressure stripping of WLM, a dwarf galaxy far away from any large host galaxy
Józsa, Gyula I. G.; McConnachie, Alan W.; Hammer, Francois +5 more
Dwarf galaxies are affected by all the evolutionary processes normally at work in galaxies of any mass. As fainter and less massive galaxies, however, dwarf galaxies are particularly susceptible to environmental mechanisms that can more easily perturb these systems. Importantly, the presence of nearby large galaxies is expected to have a profound …
The VVV survey: Long-period variable stars. I. Photometric catalog of ten VVV/OGLE tiles
Minniti, D.; Zoccali, M.; Rojas-Arriagada, A. +7 more
Context. Long-period variable stars (LPVs) are pulsating red giants, primarily in the asymptotic giant branch phase, and they include both Miras and semi-regular variables (SRVs). Their period-age and period-luminosity relations enable us to trace different stellar populations, as they are intrinsically very bright and cover a wide range in distan…
Apsidal motion in massive eccentric binaries: The case of CPD-41° 7742, and HD 152218 revisited
Gosset, E.; Sterken, C.; Nazé, Y. +2 more
Context. This paper is part of a study of the apsidal motion in close eccentric massive binary systems, which aims to constrain the internal structure of the stars. We focus on the binary CPD-41° 7742 and briefly revisit the case of HD 152218.
Aims: Independent studies of CPD-41° 7742 in the past showed large discrepancies in the longitude of…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). XII. Ionised gas emission in the inner regions of lenticular galaxies
Andreani, P.; Ferrarese, L.; Buat, V. +24 more
As part of the Virgo Cluster Survey Tracing Ionised Gas Emission, a blind narrow-band Hα+[NII] imaging survey of the Virgo cluster carried out with MegaCam at the CFHT, we discovered eight massive (1010 ≲ Mstar ≲ 1011 M⊙) lenticular galaxies with prominent ionised gas emission features in their inner (a …
MINCE. I. Presentation of the project and of the first year sample
Hansen, C. J.; Bonifacio, P.; Caffau, E. +20 more
Context. In recent years, Galactic archaeology has become a particularly vibrant field of astronomy, with its main focus set on the oldest stars of our Galaxy. In most cases, these stars have been identified as the most metal-poor. However, the struggle to find these ancient fossils has produced an important bias in the observations - in particula…
Electron dynamics in small magnetospheres. Insights from global, fully kinetic plasma simulations of the planet Mercury
Henri, Pierre; André, Nicolas; Aizawa, Sae +4 more
Context. The planet Mercury possesses a small but highly dynamic magnetosphere in which the role and dynamics of electrons are still largely unknown.
Aims: We aim to model the global dynamics of solar-wind electrons impinging on Mercury's magnetosphere. Particular relevance is given to local acceleration processes and the global circulation p…
Phase-resolved X-ray spectroscopy of PSR B0656+14 with SRG/eROSITA and XMM-Newton
Maitra, Chandreyee; Haberl, Frank; Potekhin, Alexander Y. +13 more
We present a detailed spectroscopic and timing analysis of X-ray observations of the bright pulsar PSR B0656+14. The observations were obtained simultaneously with eROSITA and XMM-Newton during the calibration and performance verification phase of the Spektrum-Roentgen-Gamma mission (SRG). The analysis of the 100 ks deep observation of eROSITA is …
Water, hydrogen cyanide, carbon monoxide, and dust production from distant comet 29P/Schwassmann-Wachmann 1
Küppers, M.; Hartogh, P.; Lellouch, E. +13 more
Context. 29P/Schwassmann-Wachmann 1 is a distant Centaur/comet, showing persistent CO-driven activity and frequent outbursts.
Aims: We aim to better characterize its gas and dust activity from multiwavelength observations performed during outbursting and quiescent states.
Methods: We used the HIFI, PACS and SPIRE instruments of the Hersc…
Ariel stellar characterisation. I. Homogeneous stellar parameters of 187 FGK planet host stars: Description and validation of the method
Rainer, M.; Bossini, D.; Sanna, N. +16 more
Context. In 2020 the European Space Agency selected Ariel as the next mission to join the space fleet of observatories to study planets outside our Solar System. Ariel will be devoted to the characterisation of 1000 planetary atmospheres in order to understand what exoplanets are made of, how they form, and how they evolve. To achieve the last two…
A search for ionised gas outflows in an Hα imaging atlas of nearby LINERs
Hermosa Muñoz, L.; Márquez, I.; Masegosa, J. +2 more
Context. Outflows play a major role in the evolution of galaxies. However, we do not yet have a complete picture of their properties (extension, geometry, orientation, and clumpiness). For low-luminosity active galactic nuclei (AGNs), in particular low-ionisation nuclear emission line regions (LINERs), the rate of outflows and their properties are…