Search Publications
VST-GAME: Galaxy assembly as a function of mass and environment with VST. Photometric assessment and density field of MACSJ0416
Rodighiero, G.; Demarco, R.; Vulcani, B. +14 more
Context. Observational studies have widely demonstrated that galaxy physical properties are strongly affected by the surrounding environment. On one side, gas inflows provide galaxies with new fuel for star formation. On the other side, the high temperatures and densities of the medium are expected to induce quenching in the star formation. Observ…
Reeling in the Whirlpool galaxy: Distance to M 51 clarified through Cepheids and the type IIP supernova 2005cs
Leibundgut, B.; Anderson, R. I.; Blondin, S. +4 more
Context. The distance to the Whirlpool galaxy, M 51, is still debated, even though the galaxy has been studied in great detail. Current estimates range from 6.02 to 9.09 Mpc, and different methods yield discrepant results. No Cepheid distance has been published for M 51 to date.
Aims: We aim to estimate a more reliable distance to M 51 throug…
Surface chemical composition of single WNh stars
Martins, Fabrice
Context. Wolf-Rayet (WR) stars of the WNh category contain a significant fraction of hydrogen at their surface. They can be hydrogen-burning, very massive stars or stars in a post-main sequence phase of evolution. Also, WNh stars are sometimes not included in population synthesis models.
Aims: We aim to better characterise the properties of s…
Milky Way globular clusters on cosmological timescales. III. Interaction rates
Berczik, Peter; Ishchenko, Maryna; Omarov, Chingis +4 more
Aims: We carry out the self-consistent dynamic evolution of the orbital structure of Milky Way globular clusters. This allows us to estimate possible and probable close passages and even collisions of the clusters with each other.
Methods: We reproduced the orbits of 147 globular clusters in 10 Gyr lookback time using our own high-order …
Chrono-chemodynamical analysis of the globular cluster NGC 6355: Looking for the fundamental bricks of the Bulge
Valentini, M.; Chiappini, C.; Bica, E. +7 more
The information on Galactic assembly time is imprinted on the chemodynamics of globular clusters. This makes them important probes that help us to understand the formation and evolution of the Milky Way. Discerning between in-situ and ex-situ origin of these objects is difficult when we study the Galactic bulge, which is the most complex and mixed…
Discovery of two promising isolated neutron star candidates in the SRG/eROSITA All-Sky Survey
Haberl, F.; Buckley, D. A. H.; Pires, A. M. +2 more
We report the discovery of the isolated neutron star (INS) candidates
A multi-technique approach to identifying and/or constraining radial-velocity substellar companions
Kiefer, F.; Lagrange, A. -M.; Rubini, P. +3 more
Context. Although more than one thousand substellar companions have already been detected with the radial velocity (RV) method, many new companions remain to be detected in the public RV archives.
Aims: We wish to use the archival data obtained with the ESO/HARPS spectrograph to search for substellar companions.
Methods: We used the astr…
Identifying Lyα emitter candidates with Random Forest: Learning from galaxies in the CANDELS survey
Castellano, M.; Pentericci, L.; Fynbo, J. P. U. +8 more
The physical processes that make a galaxy a Lyman alpha emitter have been extensively studied over the past 25 yr. However, the correlations between physical and morphological properties of galaxies and the strength of the Lyα emission line are still highly debated. Here, we investigate the correlations between the rest-frame Lyα equivalent width …
A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS
Carmona, A.; Donati, J. -F.; Winn, J. N. +39 more
TOI-1695 is a V-mag = 13 M-dwarf star from the northern hemisphere at 45 pc from the Sun, around which a 3.134-day periodic transit signal from a super-Earth candidate was identified in TESS photometry. With a transit depth of 1.3 mmag, the radius of candidate TOI-1695.01 was estimated by the TESS pipeline to be 1.82 R⊕ with an equilibr…
Milky Way globular clusters on cosmological timescales. II. Interaction with the Galactic centre
Berczik, Peter; Ishchenko, Maryna; Sobolenko, Margaryta +2 more
Aims: We estimate the dynamical evolution of the interaction of globular clusters' with the Galactic centre that dynamically changed in the past.
Methods: We simulated the orbits of 147 globular clusters over a 10 Gyr lookback time using the parallel N-body code `φ-GPU'. For each globular cluster, we generated 1000 sets of initial data w…