Search Publications
Resolving a merger in a hyperluminous submillimeter galaxy at z = 2.82
Smail, Ian; Bertoldi, F.; Chapman, S. C. +1 more
We present the resolved properties of the z = 2.82 hyperluminous infrared Galaxy (HyLIRG) HS1700.850.1, the brightest 850 $\mu$m source found in the SCUBA-2 followup to the Keck Baryonic Structure Survey fields (S850$\mu$m =19.5 mJy), and amongst the most luminous starbursts known at any redshift.- Using the IRAM-NOEMA interferometer in…
Constraints on planetary tidal dissipation from a detailed study of Kepler 91b
Buldgen, G.; Eggenberger, P.; Bolmont, E. +2 more
Context. With the detection of thousands of exoplanets, characterising their dynamical evolution in detail represents a key step in the understanding of their formation. Studying the dissipation of tides occurring both in the host star and in the planets is of great relevance in order to investigate the distribution of the angular momentum occurri…
The fastest hot subdwarfs revisited
Heber, U.; Muchfuss
Hyper-velocity stars (HVS) are enigmatic objects because they are travelling so fast that they escape from the Galaxy. Among hot subdwarfs, only one such star is known, the He-sdO US 708. The Hyper-MUCHFUSS collaboration provided additional HVS candidates. Here we revisit the fastest candidates including US 708 by analysing optical spectra and spe…
A blazar candidate for the Fermi source 4FGL J1848.7-0129
Luque-Escamilla, Pedro L.; Martí, Josep; Combi, Jorge A. +2 more
The Fermi source 4FGL J1848.7-0129 has been historically related to the globular cluster GLIMPSE-C01 since its very first detection. Although this association is widely accepted, as it appears in the most recent Fermi catalogue, it deserves to be revisited given the multiwavelength evidences and the recent discovery of variable X-ray sources in th…
Analysis of integral field spectroscopy observations of the planetary nebula Hen 2-108 and its central star
Corradi, Romano L. M.; Akras, Stavros; Todt, Helge +3 more
The study of planetary nebulae provides important constraints for many aspects of stellar and Galactic evolution. Hen 2-108 is a poorly known planetary nebula with a slight elliptical morphology and a peculiar central star (CS), which has defied classification. In this work, we present the first detailed integral field spectroscopic study of the p…
Astrometric detection of binary asteroids
Ofek, Eran O.; Polishook, David; Segev, Noam
Binary asteroids probe thermal-radiation effects on the main-belt asteroids' evolution. We discuss the possibility of detecting binary minor planet systems by the astrometric wobble of the centre of light around the centre of mass. This method enables the exploration of the phase-space of binary asteroids, which is difficult to explore using commo…
Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System
Duchêne, Gaspard; Oppenheimer, Rebecca; Rice, Malena +51 more
The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We present the first ALMA observation of the system as well as the continued Gemini Planet Imager monitoring of the c…
Statistical Analysis of the Probability of Interaction of Globular Clusters with Each Other and with the Galactic Center on the Cosmological Time Scale According to Gaia DR2 Data
Ishchenko, M.; Sobolenko, M.; Berczik, P. +1 more
This study is aimed at investigating the dynamic evolution of the orbits of stellar globular clusters (SGCs). To integrate the orbits backward in time, the authors use models of the time-varying potentials derived from cosmological simulations, which are closest to the potential of the Galaxy. This allows for estimating the probability of close pa…
The multizone chemical evolution of the Galactic bulge: predicting abundances for different radial zones
Mollá, M.; Cavichia, O.; Bazán, J. J.
Due to its proximity, the stellar populations of the Galactic bulge (GB) can be resolved and can be studied in detail. This allows tracing the bulge metallicity distribution function (MDF) for different spatial regions within the bulge, which may give us clues about the bulge formation and evolution scenarios. In this work, we developed a chemical…
A cross-type imaging electron spectrometer
Fu, SuiYan; Wang, YongFu; Zong, QiuGang +6 more