Search Publications
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-…
Estimating the selection function of Gaia DR3 subsamples
Casey, Andrew R.; Rix, Hans-Walter; Brown, Anthony G. A. +9 more
Context. Understanding the intricacies behind the presence and absence of sources in an astronomical catalogue is crucial for the accurate interpretation of astronomical data. In particular, for the multi-dimensional Gaia data, filters and cuts on different parameters or measurements introduce a selection function that may unintentionally alter sc…
The Gaia-ESO Survey: Homogenisation of stellar parameters and elemental abundances
Prusti, T.; Gilmore, G.; Montes, D. +59 more
The Gaia-ESO Survey is a public spectroscopic survey that targeted ≳105 stars covering all major components of the Milky Way from the end of 2011 to 2018, delivering its final public release in May 2022. Unlike other spectroscopic surveys, Gaia-ESO is the only survey that observed stars across all spectral types with dedicated, speciali…
ALMA-IMF. VI. Investigating the origin of stellar masses: Core mass function evolution in the W43-MM2&MM3 mini-starburst
Galván-Madrid, R.; Cunningham, N.; Schneider, N. +35 more
Context. Among the most central open questions regarding the initial mass function (IMF) of stars is the impact of environment on the shape of the core mass function (CMF) and thus potentially on the IMF.
Aims: The ALMA-IMF Large Program aims to investigate the variations in the core distributions (CMF and mass segregation) with cloud charact…
Bright submillimeter galaxies do trace galaxy protoclusters
Dannerbauer, Helmut; Calvi, Rosa; Castignani, Gianluca
There is controversy in the literature regarding whether distant, massive, and dusty starbursts selected at (sub)millimeter wavelengths can trace galaxy overdensities. We thus performed the first systematic search for distant protoclusters around a homogeneously selected sample of 12 spectroscopically confirmed submillimeter galaxies (SMGs) at z ∼…
Measuring the giant radio galaxy length distribution with the LoTSS
van Weeren, Reinout J.; Hardcastle, Martin J.; Dabhade, Pratik +6 more
Context. Many massive galaxies launch jets from the accretion disk of their central black hole, but only ∼103 instances are known in which the associated outflows form giant radio galaxies (GRGs, or giants): luminous structures of megaparsec extent that consist of atomic nuclei, relativistic electrons, and magnetic fields. Large samples…