Search Publications
JWST Observations of Young protoStars (JOYS): HH211: Textbook case of a protostellar jet and outflow
Östlin, G.; Güdel, M.; Ray, T. P. +22 more
Context. Due to the high visual extinction and lack of sensitive mid-infrared (MIR) telescopes, the origin and properties of outflows and jets from embedded Class 0 protostars are still poorly constrained. Aims. We aim to characterise the physical, kinematic, and dynamical properties of the HH 211 jet and outflow, one of the youngest protostellar …
JOYS+: Mid-infrared detection of gas-phase SO2 emission in a low-mass protostar. The case of NGC 1333 IRAS 2A: Hot core or accretion shock?
Chen, Y.; van Dishoeck, E. F.; Nazari, P. +18 more
Context. Thanks to the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST), our ability to observe the star formation process in the infrared has greatly improved. Due to its unprecedented spatial and spectral resolution and sensitivity in the mid-infrared, JWST/MIRI can see through highly extincted protostellar envelopes and p…
The IACOB project: XII. New grid of northern standards for the spectral classification of B-type stars
Simón-Díaz, S.; de Burgos, A.; Negueruela, I. +2 more
Context. With the advent of large spectroscopic surveys, automated stellar parameter determination has become commonplace. Nevertheless, spectral classification still offers a quick and useful alternative for obtaining parameter estimates for large samples of spectra of varying quality. Aims. We present a new atlas of stellar spectra covering the …
CHEX-MATE: Turbulence in the intra-cluster medium from X-ray surface brightness fluctuations
Pointecouteau, E.; Pratt, G. W.; Rossetti, M. +15 more
The intra-cluster medium is prone to turbulent motion that will contribute to the non-thermal heating of the gas, complicating the use of galaxy clusters as cosmological probes. Indirect approaches can estimate the intensity and structure of turbulent motions by studying the associated fluctuations in gas density and X-ray surface brightness. In t…
Evidence of extended [CII] and dust emission in local dwarf galaxies
Ginolfi, M.; Shivaei, I.; Jones, G. C. +8 more
Aims: The evolution of dwarf galaxies is dramatically affected by gaseous and dusty outflows, which can easily deprive their interstellar medium of the material needed for the formation of new stars, simultaneously enriching their surrounding circumgalactic medium (CGM). In this Letter, we present the first evidence of extended [CII] 158 &mic…
PDRs4All. VI. Probing the photochemical evolution of PAHs in the Orion Bar using machine learning techniques
Hartigan, Patrick; Zhang, Yong; Onaka, Takashi +22 more
Context. Extraordinary observations of the Orion Bar by JWST have shown, for the first time, the incredible richness of polycyclic aromatic hydrocarbon (PAH) emission bands and their variation on very small scales. These variations are the result of photochemical evolution of the PAH carrier.
Aims: We aim to probe the photochemical evolution …
Euclid preparation. XLVIII. The pre-launch Science Ground Segment simulation framework
Altieri, B.; Aussel, H.; Cimatti, A. +274 more
Context. The European Space Agency's Euclid mission is one of a raft of forthcoming large-scale cosmology surveys that will map the large-scale structure in the Universe with unprecedented precision. The mission will collect a vast amount of data that will be processed and analysed by Euclid's Science Ground Segment (SGS). The development and vali…
Reconstructing Galactic magnetic fields from local measurements for backtracking ultra-high-energy cosmic rays
Enßlin, Torsten; Edenhofer, Gordian; Pavlidou, Vasiliki +2 more
Context. Ultra-high-energy cosmic rays (UHECRs) are highly energetic charged particles with energies exceeding 1018 eV. These energies are far greater than those achieved in Earth-bound accelerators, and identifying their sources and production mechanism can shed light on many open questions in both astrophysics and high-energy physics.…
X-Shooting ULLYSES: Massive Stars at low metallicity: IX. Empirical constraints on mass-loss rates and clumping parameters for OB supergiants in the Large Magellanic Cloud
van Loon, J. Th.; Crowther, P. A.; Prinja, R. K. +16 more
Context. Current implementations of mass loss for hot, massive stars in stellar evolution models usually include a sharp increase in mass loss when blue supergiants become cooler than Teff ∼ 20 ‑ 22 kK. Such a drastic mass-loss jump has traditionally been motivated by the potential presence of a so-called bistability ionisation effect, …
MCXC-II: Second release of the Meta-Catalogue of X-ray detected Clusters of galaxies
Arnaud, M.; Pratt, G. W.; Melin, J. -B. +2 more
We present the second release of the Meta-catalogue of X-ray detected Clusters of galaxies (hereafter MCXC-II). MCXC-II has been compiled from publicly available ROSAT All Sky Survey-based (NORAS, REFLEX, BCS, SGP, NEP, MACS, CIZA, and RXGCC) and serendipitous (160SD, 400SD, SHARC, WARPS, and EMSS) X-ray cluster catalogues. Redshifts were systemat…