Search Publications
The massive relic galaxy NGC 1277 is dark matter deficient. From dynamical models of integral-field stellar kinematics out to five effective radii
Trujillo, Ignacio; Cappellari, Michele; Buitrago, Fernando +7 more
According to the Λ cold dark matter (ΛCDM) cosmology, present-day galaxies with stellar masses M⋆ > 1011 M⊙ should contain a sizable fraction of dark matter within their stellar body. Models indicate that in massive early-type galaxies (ETGs) with M⋆ ≈ 1.5 × 1011 M⊙, dark matter …
Gaia Data Release 3. Reflectance spectra of Solar System small bodies
Prusti, T.; Mazeh, T.; Zucker, S. +444 more
Context. The Gaia mission of the European Space Agency (ESA) has been routinely observing Solar System objects (SSOs) since the beginning of its operations in August 2014. The Gaia data release three (DR3) includes, for the first time, the mean reflectance spectra of a selected sample of 60 518 SSOs, primarily asteroids, observed between August 5,…
Supermassive Black Hole Winds in X-rays: SUBWAYS. I. Ultra-fast outflows in quasars beyond the local Universe
Maiolino, R.; Merloni, A.; Fiore, F. +49 more
We present a new X-ray spectroscopic study of 22 luminous (2 × 1045 ≲ Lbol/erg s−1 ≲ 2 × 1046) active galactic nuclei (AGNs) at intermediate redshifts (0.1 ≲ z ≲ 0.4), as part of the SUpermassive Black hole Winds in the x-rAYS (SUBWAYS) sample, mostly composed of quasars and type 1 AGNs. Here, 17 targets…
An updated measurement of the Hubble constant from near-infrared observations of Type Ia supernovae
Leibundgut, B.; Galbany, L.; Dhawan, S. +12 more
We present a measurement of the Hubble constant (H0) using type Ia supernovae (SNe Ia) in the near-infrared (NIR) from the recently updated sample of SNe Ia in nearby galaxies with distances measured via Cepheid period-luminosity relations by the SH0ES project. We collected public near-infrared photometry of up to 19 calibrator SNe Ia a…
A state-of-the-art strong-lensing model of MACS J0416.1−2403 with the largest sample of spectroscopic multiple images
Grillo, C.; Rosati, P.; Vanzella, E. +9 more
The combination of multi-band imaging from the Hubble Space Telescope with Multi-Unit Spectroscopic Explorer integral field spectroscopy, obtained at the Very Large Telescope, has recently driven remarkable progress in strong-lensing (SL) modeling of galaxy clusters. From a few tens of multiple images with photometric redshifts per cluster, a new …
Clues on the presence and segregation of very massive stars in the Sunburst Lyman-continuum cluster at z = 2.37
Schaerer, D.; Martins, F.; Marques-Chaves, R. +15 more
We report the identification of very massive stars (VMS; mass > 100 M⊙) that may be segregated in the center of the young massive star cluster at z = 2.37 hosted in the lensed galaxy called Sunburst galaxy. This result is based on two pieces of evidence: (1) VLT/MUSE spectra of several multiple images of the same star cluster show ke…
Gaia Data Release 3. Cross-match of Gaia sources with variable objects from the literature
Gavras, Panagiotis; Ábrahám, Péter; Kóspál, Ágnes +22 more
Context. In current astronomical surveys with ever-increasing data volumes, automated methods are essential. Objects of known classes from the literature are necessary to train supervised machine-learning algorithms and to verify and validate their results.
Aims: The primary goal of this work is to provide a comprehensive data set of known va…
Ionized gas kinematics and chemical abundances of low-mass star-forming galaxies at z ∼ 3
Pentericci, L.; Boutsia, K.; Amorín, R. +6 more
Context. Feedback from massive stars plays a crucial role in regulating the growth of young star-forming galaxies (SFGs) and in shaping their interstellar medium (ISM). This feedback contributes to the removal and mixing of metals via galactic outflows and to the clearance of neutral gas, which facilitates the escape of ionizing photons.
Aims…
MIRI/JWST observations reveal an extremely obscured starburst in the z = 6.9 system SPT0311-58
Ilbert, O.; Güdel, M.; Colina, L. +29 more
Luminous infrared starbursts in the early Universe are thought to be the progenitors of massive quiescent galaxies identified at redshifts 2-4. Using the Mid-IRfrared Instrument (MIRI) on board the James Webb Space Telescope (JWST), we present mid-infrared sub-arcsec imaging and spectroscopy of such a starburst: the slightly lensed hyper-luminous …
Sub-millimetre galaxies with Webb. Near-infrared counterparts and multi-wavelength morphology
Brammer, Gabe; Greve, Thomas R.; Gillman, Steven +12 more
We utilised the unprecedented depth and resolution of recent early-release science (ERS) JWST observations to define the near-infrared counterparts of sub-millimetre galaxies (SMGs). We identified 45 SCUBA-2 SMG positions within the Cosmic Evolution Early Release Science (CEERS) survey JWST/NIRCam fields. Through an analysis of multi-wavelength p-…