Search Publications
HD 344787: a true Polaris analogue?
Plachy, E.; Clementini, G.; Ripepi, V. +10 more
Context. Classical Cepheids (DCEPs) are the most important primary indicators for the extragalactic distance scale, but they are also important objects in their own right, allowing us to place constraints on the physics of intermediate-mass stars and the pulsation theories.
Aims: We have investigated the peculiar DCEP HD 344787, which is know…
Potential asteroid discoveries by the ESA Gaia mission. Results from follow-up observations
Mignard, F.; Panem, C.; Tanga, P. +42 more
Context. Since July 2014, the Gaia mission of the European Space Agency has been surveying the entire sky down to magnitude 20.7 in the visible. In addition to the millions of daily observations of stars, thousands of Solar System objects (SSOs) are observed. By comparing their positions, as measured by Gaia, to those of known objects, a daily pro…
Hunting for the elusive methylene radical
Menten, K. M.; Gong, Y.; Bergman, P. +4 more
Context. The NKaKc = 404-313 transitions of ortho-CH2 between 68 and 71 GHz were first detected toward the Orion-KL and W51 Main star-forming regions. Given their high upper level energies (225 K) above the ground state, they were naturally thought to arise in dense, hot molecular c…
TOI-1296b and TOI-1298b observed with TESS and SOPHIE: two hot Saturn-mass exoplanets with different densities around metal-rich stars
Deleuil, M.; Moutou, C.; Hoyer, S. +40 more
We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity met…
Constraints on the nearby exoplanet ɛ Indi Ab from deep near- and mid-infrared imaging limits
Viswanath, Gayathri; Pantin, Eric; Brandner, Wolfgang +16 more
The past decade has seen increasing efforts in detecting and characterising exoplanets using high-contrast imaging in the near- and mid-infrared, which is the optimal wavelength domain for studying old, cold planets. In this work, we present deep adaptive optics imaging observations of the nearby Sun-like star ɛ Ind A with the NaCo (L') and NEAR (…
SEEDisCS. I. Molecular gas in galaxy clusters and their large-scale structure: The case of CL1411.1−1148 at z ∼ 0.5
Jablonka, P.; De Lucia, G.; Zaritsky, D. +7 more
We investigate how the galaxy reservoirs of molecular gas fuelling star formation are transformed while the host galaxies infall onto galaxy cluster cores. As part of the Spatially Extended ESO Distant Cluster Survey (SEEDisCS), we present CO(3-2) observations of 27 star-forming galaxies obtained with the Atacama Large Millimeter Array. These sour…
New low-mass members of Chamaeleon I and ϵ Cha
Scholz, A.; Mužić, K.; Almendros-Abad, V. +3 more
Aims: The goal of this paper is to increase the membership list of the Chamaeleon star-forming region and the ϵ Cha moving group, in particular for low-mass stars and substellar objects. We extended the search region significantly beyond the dark clouds.
Methods: Our sample has been selected based on proper motions and colours obtained f…
Energetic ions in the Venusian system: Insights from the first Solar Orbiter flyby
Kulkarni, S. R.; Maksimovic, M.; Bale, S. D. +54 more
The Solar Orbiter flyby of Venus on 27 December 2020 allowed for an opportunity to measure the suprathermal to energetic ions in the Venusian system over a large range of radial distances to better understand the acceleration processes within the system and provide a characterization of galactic cosmic rays near the planet. Bursty suprathermal ion…
How many suns are in the sky? A SPHERE multiplicity survey of exoplanet host stars. I. Four new close stellar companions including a white dwarf
Ginski, C.; Mugrauer, M.; Vogt, N. +2 more
Aims: We are studying the influence of stellar multiplicity on exoplanet systems and, in particular, systems that have been detected via radial-velocity searches. We are specifically interested in the closest companions as they would have a strong influence on the evolution of the original planet-forming disks. In this study, we present new c…
FEDReD. III. Unraveling the 3D structure of Vela
Arenou, F.; Babusiaux, C.; Hottier, C.
Context. The Vela complex is a region of the sky that gathers several stellar and interstellar structures in a few hundred square degrees. Aims.Gaia data now allow us to obtain a 3D view of the Vela interstellar structures through the dust extinction.
Methods: We used the FEDReD (Field Extinction-Distance Relation Deconvolver) algorithm on ne…