Search Publications
The Lensed Lyman-Alpha MUSE Arcs Sample (LLAMAS). I. Characterisation of extended Lyman-alpha halos and spatial offsets
Bauer, F. E.; Richard, J.; Verhamme, A. +17 more
Aims: We present the Lensed Lyman-Alpha MUSE Arcs Sample (LLAMAS) selected from MUSE and HST observations of 17 lensing clusters. The sample consists of 603 continuum-faint (−23 < MUV < −14) lensed Lyman-α emitters (producing 959 images) with secure spectroscopic redshifts between 2.9 and 6.7. Combining the power of cluster m…
CHEX-MATE: Morphological analysis of the sample
Pointecouteau, E.; Pratt, G. W.; Rossetti, M. +17 more
A classification of the galaxy cluster's dynamical state is crucial when dealing with large samples. The identification of the most relaxed and most disturbed objects is necessary for both cosmological analysis, focused on spherical and virialised systems, and astrophysical studies, centred around all those micro-physical processes that take place…
First eROSITA study of nearby M dwarfs and the rotation-activity relation in combination with TESS
Salvato, M.; Wolf, J.; Stelzer, B. +3 more
We present the first results with the ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Russian Spektrum-Roentgen-Gamma mission, and we combine the new X-ray data with observations with the Transiting Exoplanet Survey Satellite (TESS). We used the SUPERBLINK proper motion catalog of nearby M dwarfs as input sample to search fo…
Systematic KMTNet planetary anomaly search. V. Complete sample of 2018 prime-field
Stassun, Keivan G.; Han, Cheongho; Udalski, Andrzej +69 more
We complete the analysis of all 2018 prime-field microlensing planets identified by the Korea Microlensing Telescope Network (KMTNet) Anomaly Finder. Among the ten previously unpublished events with clear planetary solutions, eight are either unambiguously planetary or are very likely to be planetary in nature: OGLE-2018-BLG-1126, KMT-2018-BLG-200…
Tracing the Milky Way warp and spiral arms with classical Cepheids
Kovtyukh, V.; Lemasle, B.; Kniazev, A. +10 more
Context. Mapping the Galactic spiral structure is a difficult task since the Sun is located in the Galactic plane and because of dust extinction. For these reasons, molecular masers in radio wavelengths have been used with great success to trace the Milky Way spiral arms. Recently, Gaia parallaxes have helped in investigating the spiral structure …
The mass and size of Herbig disks as seen by ALMA
van Dishoeck, E. F.; Hogerheijde, M. R.; Stapper, L. M. +1 more
Context. Many population studies have been performed over the past decade with the Atacama Large millimeter/submillimeter Array (ALMA) to understand the bulk properties of protoplanetary disks around young stars. The studied populations have mostly consisted of late spectral type (i.e., G, K & M) stars, with relatively few more massive Herbig …
TDCOSMO. IX. Systematic comparison between lens modelling software programs: Time-delay prediction for WGD 2038−4008
Frieman, J.; Treu, T.; Palmese, A. +15 more
The importance of alternative methods for measuring the Hubble constant, such as time-delay cosmography, is highlighted by the recent Hubble tension. It is paramount to thoroughly investigate and rule out systematic biases in all measurement methods before we can accept new physics as the source of this tension. In this study, we perform a check f…
High-precision chemical abundances of Galactic building blocks. The distinct chemical abundance sequence of Sequoia
Hattori, Kohei; Helmi, Amina; Ishigaki, Miho N. +5 more
Context. Sequoia is a retrograde kinematic substructure in the nearby Galactic halo, whose properties are a matter of debate. For example, previous studies do not necessarily agree on the chemical abundances of Sequoia stars, which are important for understanding its nature.
Aims: We characterize the chemical properties of a sample of stars f…
Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076
Alonso, R.; Bouchy, F.; Deleuil, M. +93 more
Context. TOI-2076 is a transiting three-planet system of sub-Neptunes orbiting a bright (G = 8.9 mag), young (340 ± 80 Myr) K-type star. Although a validated planetary system, the orbits of the two outer planets were unconstrained as only two non-consecutive transits were seen in TESS photometry. This left 11 and 7 possible period aliases for each…
An elliptical accretion disk following the tidal disruption event AT 2020zso
Gromadzki, M.; Young, D.; Inserra, C. +25 more
Aims: The modelling of spectroscopic observations of tidal disruption events (TDEs) to date suggests that the newly formed accretion disks are mostly quasi-circular. In this work we study the transient event AT 2020zso, hosted by an active galactic nucleus (AGN; as inferred from narrow emission line diagnostics), with the aim of characterisin…