Search Publications
Evidence That the Occurrence Rate of Hot Jupiters around Sun-like Stars Decreases with Stellar Age
Miyazaki, Shota; Masuda, Kento
We investigate how the occurrence rate of giant planets (minimum mass > 0.3 M Jup) around Sun-like stars depends on the age, mass, and metallicity of their host stars. We develop a hierarchical Bayesian framework to infer the number of planets per star (NPPS) as a function of both planetary and stellar parameters. The framework fully…
Cataclysmic Variables from Sloan Digital Sky Survey - V. The search for period bouncers continues
Hermes, J. J.; Breedt, E.; Roman-Lopes, A. +25 more
SDSS-V is carrying out a dedicated survey for white dwarfs, single, and in binaries, and we report the analysis of the spectroscopy of 118 cataclysmic variables (CVs) and CV candidates obtained during the final plug plate observations of SDSS. We identify eight new CVs, spectroscopically confirm 53 and refute 11 published CV candidates, and we rep…
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…
A 1.3% Distance to M33 from Hubble Space Telescope Cepheid Photometry
Casertano, Stefano; Williams, Benjamin F.; Li, Siyang +7 more
We present a low-dispersion period-luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry from the PHATTER survey. Using high-quality ground-based light curves, we recover Cepheid phases and amplitudes for multi-epoch HST data and we perform template fitting to derive intensity-averaged mean…
The impact of satellite trails on Hubble Space Telescope observations
Popescu, Marcel; Merín, Bruno; McCaughrean, Mark J. +8 more
The recent launch of low Earth orbit satellite constellations is creating a growing threat for astronomical observations with ground-based telescopes1-10 that has alarmed the astronomical community 11-16. Observations affected by artificial satellites can become unusable for scientific research, wasting a growing fraction of …
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…
Systematic broad-band X-ray study of super-Eddington accretion on to supermassive black holes - I. X-ray continuum
Ho, Luis C.; Ricci, Claudio; Tombesi, Francesco +6 more
We present the first systematic broad-band X-ray study of super-Eddington accretion onto supermassive black holes with simultaneous NuSTAR and XMM-Newton or Swift/XRT observations of a sample of eight super-Eddington accreting Active Galactic Nuclei (AGNs) with Eddington ratio 1 < λ Edd < 426. We find that the super-Eddington accr…