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View article: oMEGACat. VII. Tracing Interstellar and Intracluster Medium of <i>ω</i> Centauri Using Sodium Absorptions
oMEGACat. VII. Tracing Interstellar and Intracluster Medium of <i>ω</i> Centauri Using Sodium Absorptions Open
We investigate the foreground interstellar medium along the line of sight and intracluster medium of ω Centauri ( ω Cen) by measuring the equivalent width of Na I D absorptions from MUSE observations. The large line-of-sight velocity diffe…
View article: Serendipitous Discovery of a Faint Planetary Nebula in the Massive Young LMC Cluster NGC 1866
Serendipitous Discovery of a Faint Planetary Nebula in the Massive Young LMC Cluster NGC 1866 Open
During an integral-field spectroscopic study of stars in the massive young open cluster NGC 1866 in the Large Magellanic Cloud, we serendipitously discovered a faint planetary nebula (PN). We designate it “Ka LMC 1,” and find that its loca…
View article: Serendipitous Discovery of a Faint Planetary Nebula in the Massive Young LMC Cluster NGC 1866
Serendipitous Discovery of a Faint Planetary Nebula in the Massive Young LMC Cluster NGC 1866 Open
During an integral-field spectroscopic study of stars in the massive young open cluster NGC 1866 in the Large Magellanic Cloud, we serendipitously discovered a faint planetary nebula (PN). We designate it "Ka LMC 1," and find that its loca…
View article: JWST imaging of omega Centauri
JWST imaging of omega Centauri Open
We present a detailed analysis of the white dwarf (WD) cooling sequence (CS) in omega Centauri based on combined Hubble Space Telescope (HST) and JWST observations. Our analysis confirms the previously reported split –based on HST observat…
View article: JWST-TST DREAMS: NIRSpec/PRISM Transmission Spectroscopy of the Habitable Zone Planet TRAPPIST-1 e
JWST-TST DREAMS: NIRSpec/PRISM Transmission Spectroscopy of the Habitable Zone Planet TRAPPIST-1 e Open
TRAPPIST-1 e is one of the very few rocky exoplanets that is both amenable to atmospheric characterization and resides in the habitable zone of its star—located at a distance from its star such that it might, with the right atmosphere, sus…
View article: Tracing stellar rotation in young massive LMC clusters
Tracing stellar rotation in young massive LMC clusters Open
We present a detailed analysis of stellar rotation along the main sequences of NGC 1866 and NGC 1856, two young ($\sim$200–300 Myr) massive clusters in the Large Magellanic Cloud, using MUSE integral field spectroscopy. Differences in stel…
View article: HSTPROMO Internal Proper Motion Kinematics of Dwarf Spheroidal Galaxies: II. Velocity Anisotropy and Dark Matter Cusp Slope of Sculptor
HSTPROMO Internal Proper Motion Kinematics of Dwarf Spheroidal Galaxies: II. Velocity Anisotropy and Dark Matter Cusp Slope of Sculptor Open
We analyze three epochs of HST imaging over 20 years for the Sculptor dwarf spheroidal galaxy, measuring precise proper motions for 119 stars and combining them with 1760 existing line-of-sight velocities. This catalog yields the first rad…
View article: <scp> <i>JWST</i> </scp> Imaging of the Closest Globular Clusters— <scp>VI</scp> . The Lowest‐Mass Objects in M 4 and the Galactic Bulge
<span> <i>JWST</i> </span> Imaging of the Closest Globular Clusters— <span>VI</span> . The Lowest‐Mass Objects in M 4 and the Galactic Bulge Open
We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously p…
View article: The Internal Kinematics of NGC 2808 and Its Multiple Populations
The Internal Kinematics of NGC 2808 and Its Multiple Populations Open
We use new Hubble Space Telescope observations coupled with archival data spanning a total temporal baseline of 17 yr to study the internal kinematics of the multiple populations in the globular cluster NGC 2808 from its center out to ∼8 h…
View article: oMEGACat. V. Helium Enrichment in <i>ω</i> Centauri as a Function of Metallicity
oMEGACat. V. Helium Enrichment in <i>ω</i> Centauri as a Function of Metallicity Open
Constraining the helium enhancement in stars is critical for understanding the formation mechanisms of multiple populations in star clusters. However, measuring helium variations for many stars within a cluster remains observationally chal…
View article: Searching for exotic object companions in the dense core of NGC 362
Searching for exotic object companions in the dense core of NGC 362 Open
The dense cores of globular clusters (GCs) are efficient environments for the production of exotic stellar populations, including millisecond pulsars (MSPs), low-mass X-ray binaries (LMXBs), and cataclysmic variables (CVs). Most of these o…
View article: oMEGACat. VI. Analysis of the Overall Kinematics of Omega Centauri in 3D: Velocity Dispersion, Kinematic Distance, Anisotropy, and Energy Equipartition
oMEGACat. VI. Analysis of the Overall Kinematics of Omega Centauri in 3D: Velocity Dispersion, Kinematic Distance, Anisotropy, and Energy Equipartition Open
Omega Centauri ( ω Cen) is the Milky Way’s most massive globular cluster and is likely the stripped nucleus of an accreted dwarf galaxy. In this paper, we analyze ω Cen’s kinematics using data from oMEGACat, a comprehensive catalog of ω Ce…
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
Context. The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant Universe. Among JWST’s instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at…
View article: <scp><i>JWST</i></scp> Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of <scp>M4</scp>
<span><i>JWST</i></span> Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of <span>M4</span> Open
We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121…
View article: JWST Imaging of the Closest Globular Clusters -- V. The White Dwarfs Cooling Sequence of M4
JWST Imaging of the Closest Globular Clusters -- V. The White Dwarfs Cooling Sequence of M4 Open
We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken approximately 20 years earlier to compute proper-motion membership for the globular cluster (GC)…
View article: oMEGACat V: Helium Enrichment in $\\omega$ Centauri as a Function of\n Metallicity
oMEGACat V: Helium Enrichment in $\\omega$ Centauri as a Function of\n Metallicity Open
Constraining the helium enhancement in stars is critical for understanding\nthe formation mechanisms of multiple populations in star clusters. However,\nmeasuring helium variations for many stars within a cluster remains\nobservationally c…
View article: The James Webb Space Telescope Absolute Flux Calibration. II. Mid-infrared Instrument Imaging and Coronagraphy
The James Webb Space Telescope Absolute Flux Calibration. II. Mid-infrared Instrument Imaging and Coronagraphy Open
The absolute flux calibration of the Mid-Infrared Instrument imaging and coronagraphy is based on observations of multiple stars taken during the first 2.5 yr of James Webb Space Telescope operations. The observations were designed to ensu…
View article: <i>Euclid</i>: High-precision imaging astrometry and photometry from Early Release Observations
<i>Euclid</i>: High-precision imaging astrometry and photometry from Early Release Observations Open
The instruments at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of 0.57 deg 2 . This exquisite image quality has the potential to produce high-pre…
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant universe. Among JWST's instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at waveleng…
View article: oMEGACat. IV. Constraining the Ages of Omega Centauri Subgiant Branch Stars with HST and MUSE
oMEGACat. IV. Constraining the Ages of Omega Centauri Subgiant Branch Stars with HST and MUSE Open
We present age estimates for over 8100 subgiant branch (SGB) stars in Omega Centauri ( ω Cen) to study its star formation history. Our large data set, which combines multi-wavelength Hubble Space Telescope photometry with MUSE metallicitie…
View article: Euclid: High-precision imaging astrometry and photometry from Early Release Observations. I. Internal kinematics of NGC 6397 by combining Euclid and Gaia data
Euclid: High-precision imaging astrometry and photometry from Early Release Observations. I. Internal kinematics of NGC 6397 by combining Euclid and Gaia data Open
The instruments at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of 0.57 deg$^2$. This exquisite image quality has the potential to produce high-pr…
View article: JWST imaging of the closest globular clusters
JWST imaging of the closest globular clusters Open
We present observations of the two closest globular clusters, NGC 6121 and NGC 6397, taken with the NIRISS detector of JWST. The combination of our new JWST data with archival Hubble Space Telescope (HST) images allows us to compute proper…
View article: Energy equipartition in multiple-population globular clusters
Energy equipartition in multiple-population globular clusters Open
We present the results of Monte Carlo simulations aimed at exploring the evolution towards energy equipartition of first- (1G) and second-generation (2G) stars in multiple-population globular clusters and how this evolution is affected by …
View article: Author Correction: Fast-moving stars around an intermediate-mass black hole in ω Centauri
Author Correction: Fast-moving stars around an intermediate-mass black hole in ω Centauri Open
View article: The James Webb Space Telescope Absolute Flux Calibration. II. Mid-Infrared Instrument Imaging and Coronagraphy
The James Webb Space Telescope Absolute Flux Calibration. II. Mid-Infrared Instrument Imaging and Coronagraphy Open
The absolute flux calibration of the Mid-Infrared Instrument Imaging and Coronagraphy is based on observations of multiple stars taken during the first 2.5 years of JWST operations. The observations were designed to ensure that the flux ca…
View article: The HST Large Programme on <i>ω</i> Centauri
The HST Large Programme on <i>ω</i> Centauri Open
We present a study of the white dwarf (WD) cooling sequence (CS) in the globular cluster (GC) Omega Centauri (or NGC 5139; hereafter, ω Cen), the primary goal of a dedicated Hubble Space Telescope (HST) programme. We find that the peak at …
View article: JWST imaging of the closest globular clusters -- IV. Chemistry, luminosity, and mass functions of the lowest-mass members in the NIRISS parallel fields
JWST imaging of the closest globular clusters -- IV. Chemistry, luminosity, and mass functions of the lowest-mass members in the NIRISS parallel fields Open
We present observations of the two closest globular clusters, NGC 6121 and NGC 6397, taken with the NIRISS detector of JWST. The combination of our new JWST data with archival Hubble Space Telescope (HST) images allows us to compute proper…
View article: The HST Large Programme on Omega Centauri -- VII. The white dwarf cooling sequence
The HST Large Programme on Omega Centauri -- VII. The white dwarf cooling sequence Open
We present a study of the white dwarf (WD) cooling sequence (CS) in the globular cluster (GC) Omega Centauri, the primary goal of a dedicated Hubble Space Telescope (HST) programme. Our analysis has revealed that the peak at the terminatio…
View article: BP3M: Bayesian Positions, Parallaxes, and Proper Motions Derived from the Hubble Space Telescope and Gaia Data
BP3M: Bayesian Positions, Parallaxes, and Proper Motions Derived from the Hubble Space Telescope and Gaia Data Open
We present a hierarchical Bayesian pipeline, BP3M , that measures positions, parallaxes, and proper motions (PMs) for cross-matched sources between Hubble Space Telescope (HST) images and Gaia—even for sparse fields ( N * < 10 per image)—e…
View article: Combined Gemini-South and HST photometric analysis of the globular cluster NGC 6558
Combined Gemini-South and HST photometric analysis of the globular cluster NGC 6558 Open
Context . NGC 6558 is a low-galactic-latitude globular cluster projected in the direction of the Galactic bulge. Due to high reddening, this region presents challenges in deriving accurate parameters, which require meticulous photometric a…