Search Publications
Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO
Alonso, R.; Deleuil, M.; Erikson, A. +83 more
Context. Stellar granulation generates fluctuations in photometric and spectroscopic data whose properties depend on the stellar type, composition, and evolutionary state. Characterizing granulation is key for understanding stellar atmospheres and detecting planets.
Aims: We aim to detect the signatures of stellar granulation, link spectrosco…
ISPY: NACO Imaging Survey for Planets around Young stars. The demographics of forming planets embedded in protoplanetary disks
Quanz, S. P.; Quirrenbach, A.; Henning, T. +11 more
Context. Planet formation is a frequent process, but little observational constraints exist about the mechanisms involved, especially for giant planets at large separation. The NaCo-ISPY large program is a 120 night L'-band direct imaging survey aimed at investigating the giant planet population on wide orbits (a > 10 au) around stars hosting d…
A MUSE view of the massive merging galaxy cluster ACT-CL J0102-4915 (El Gordo) at z = 0.87. Robust strong lensing model and data release
Sharon, K.; Demarco, R.; Grillo, C. +11 more
We present a detailed strong lensing analysis of the massive and distant (z = 0.870) galaxy cluster ACT-CL J0102-4915 (ACT0102, also known as El Gordo), taking advantage of new spectroscopic data from the Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope and archival imaging from the Hubble Space Telescope. Thanks to the MUSE da…
The cerium content of the Milky Way as revealed by Gaia DR3 GSP-Spec abundances
Recio-Blanco, A.; de Laverny, P.; Álvarez, M. A. +12 more
Context. The recent Gaia third data release contains a homogeneous analysis of millions of high-quality Radial Velocity Spectrometer (RVS) stellar spectra by the GSP-Spec module. This led to the estimation of millions of individual chemical abundances and allows us to chemically map the Milky Way. The published GSP-Spec abundances include three he…
Wide-field CO isotopologue emission and the CO-to-H2 factor across the nearby spiral galaxy M101
Schinnerer, Eva; Bigiel, Frank; Koch, Eric W. +18 more
Carbon monoxide (CO) emission constitutes the most widely used tracer of the bulk molecular gas in the interstellar medium (ISM) in extragalactic studies. The CO-to-H2 conversion factor, α12CO(1−0), links the observed CO emission to the total molecular gas mass. However, no single prescription perfectly describes t…
Metal enrichment and evolution in four z > 6.5 quasar sightlines observed with JWST/NIRSpec
Maiolino, R.; Jakobsen, P.; Perna, M. +7 more
We present JWST/NIRSpec R ≃ 2700 spectra of four high-redshift quasars: VDES J0020-3653 (z = 6.860), DELS J0411-0907 (z = 6.825), UHS J0439+1634 (z = 6.519), and ULAS J1342+0928 (z = 7.535). The exquisite data quality, signal-to-noise ratio of 50-200, and large 0.86 µm ≤ λ ≤ 5.5 µm spectral coverage allowed us to identify between 13 an…
TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet
Mustill, A. J.; Dai, F.; Gandolfi, D. +59 more
The TOI-1130 is a known planetary system around a K-dwarf consisting of a gas giant planet, TOI-1130 c on an 8.4-day orbit that is accompanied by an inner Neptune-sized planet, TOI-1130 b, with an orbital period of 4.1 days. We collected precise radial velocity (RV) measurements of TOI-1130 with the HARPS and PFS spectrographs as part of our ongoi…
CHEX-MATE: Constraining the origin of the scatter in galaxy cluster radial X-ray surface brightness profiles
Arnaud, M.; Pointecouteau, E.; Pratt, G. W. +25 more
We investigate the statistical properties and the origin of the scatter within the spatially resolved surface brightness profiles of the CHEX-MATE sample, formed by 118 galaxy clusters selected via the SZ effect. These objects have been drawn from the Planck SZ catalogue and cover a wide range of masses, M500 = [2 − 15]×1014 …
Cluster Ages to Reconstruct the Milky Way Assembly (CARMA). I. The final word on the origin of NGC 6388 and NGC 6441
Salaris, Maurizio; Ruiz-Lara, Tomás; Stokholm, Amalie +11 more
We present CARMA, the Cluster Ages to Reconstruct the Milky Way Assembly project, the aim of which is to determine precise and accurate age measurements for the entire system of known Galactic globular clusters (GCs) and to use them to trace the most significant merger events experienced by the Milky Way. The strength of CARMA relies on the use of…
Dissecting the RELICS cluster SPT-CLJ0615-5746 through intracluster light: Confirmation of the multiple merging state of the cluster formation
Vílchez, J. M.; Lopes, P. A. A.; Dupke, R. A. +1 more
The intracluster light (ICL) fraction, measured at certain specific wavelengths, has been shown to provide a good marker for determining the dynamical stage of galaxy clusters, that is, merging versus relaxed, for low to intermediate redshifts. We apply it for the first time to a high-redshift system, SPT-CLJ0615-5746 at z = 0.97, using its Reioni…