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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…
Strong Depletion of 13C in CO Induced by Photolysis of CO2 in the Martian Atmosphere, Calculated by a Photochemical Model
Aoki, Shohei; Yoshida, Nao; Terada, Naoki +7 more
The isotopic signature of atmospheric carbon offers a unique tracer for the history of the Martian atmosphere and the origin of organic matter on Mars. The photolysis of CO2 is known to induce strong isotopic fractionation of the carbon between CO2 and CO. However, its effects on the carbon isotopic compositions in the Martia…
A study of nine compact triply eclipsing triples
Mitnyan, T.; Pál, A.; Vanderburg, A. +22 more
In this work, we report the independent discovery and analysis of nine new compact triply eclipsing triple star systems found with the Transiting Exoplanet Survey Satellite (TESS) mission: TICs 47151245, 81525800, 99013269, 229785001, 276162169, 280883908, 294803663, 332521671, and 356324779. Each of these nine systems exhibits distinct third-body…
Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions
Butler, R. Paul; Vogt, Steven S.; Kane, Stephen R. +22 more
Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6 m class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high-priority goal of the Astro2020 Decadal Survey. To prepare for future direct imaging (DI) surveys, the list of potential targets should be thoroughly vetted to maximize effici…