F. Calura

The Large Magellanic Cloud through the lens of the James Webb Space Telescope: Binaries and the mass function in the galaxy’s outskirts

M. V. Legnardi, F. Muratore, A. P. Milone, G. Cordoni et autres

Nearby galaxies such as the Large Magellanic Cloud (LMC) offer an ideal laboratory to test the initial mass function under different physical conditions, but previous works have been limited by photometric depth and have therefore poorly constrained the low-mass regime. Here, we …

it, au, ae, us, kr, cn (code pays fourni par la source)

A pristine, star-forming complex at z = 4.19

Matteo Messa, Anita Zanella, A. Bolamperti, M Castellano et autres

We report the discovery of a faint (M 1700 ≃ −12.2), oxygen-deficient, strongly lensed ionizing source – dubbed Lensed And Pristine 2 (LAP2) – at a spectroscopic redshift of z = 4.19. LAP2 appears to be isolated and lies very close to …

it, de, gb, se, us (code pays fourni par la source)

SIEGE

F. Calura, R. Pascale, Oscar Agertz, Eric P. Andersson et autres

Star clusters stand at the crossroads between galaxies and single stars. Resolving the formation of star clusters in cosmological simulations represents an ambitious and challenging goal, since modelling their internal properties requires very high resolution. This paper is the third of a …

Constraining the geometry of the gas surrounding a typical galaxy at z = 3.4 with Lyα polarization

A. Bolamperti, S.J. Chang, Jean-Louis Vernet, A. Zanella et autres

Lyman-α (Lyα) emission is the intrinsically strongest tracer of recombining ionized hydrogen in young star-forming galaxies, but its origin is still debated. Lyα arises when emitted photons scatter in neutral hydrogen, with each scattering event changing their propagation direction and frequency. So …

de, it, nl (code pays fourni par la source)

Constraining the geometry of the gas surrounding a typical galaxy at $z = 3.4$ with Ly$α$ polarization

A. Bolamperti, S.J. Chang, Jean-Louis Vernet, A. Zanella et autres

Ly$α$ emission is the strongest tracer of recombining ionized hydrogen in young, star-forming galaxies, but its origin is still debated. Ly$α$ arises when emitted photons scatter in neutral hydrogen and, so far, observational efforts have mostly focused on the Ly$α$ surface brightness …

SIEGE III: The formation of dense stellar clusters in sub-parsec resolution cosmological simulations with individual star feedback

F. Calura, R. Pascale, Oscar Agertz, Eric P. Andersson et autres

Star clusters stand at the crossroads between galaxies and single stars. Resolving the formation of star clusters in cosmological simulations represents an ambitious and challenging goal, since modelling their internal properties requires very high resolution. This paper is the third of a …

it, se, us, fr (code pays fourni par la source)

Extreme ionizing properties of a metal-poor, M UV ≃ −12 star complex in the first gigayear

Eros Vanzella, F. Loiacono, Matteo Messa, M Castellano et autres

We report the serendipitous discovery of a faint (M UV > −12.2), low-metallicity (Z ∼ 0.02 Z⊙) ionizing source, dubbed T2c, with a spectroscopic redshift of z = 6.146. T2c is part of a larger structure amplified by the Hubble Frontier Field …

Extreme Ionizing Properties of Metal-Poor, Muv ~ -12 Star Complex in the first Gyr

E. Vanzella, F. Loiacono, Matteo Messa, M Castellano et autres

We report the serendipitous discovery of a faint (M_UV > -12.2), low-metallicity (Z ~ 0.02 Zsun), ionizing source (dubbed T2c) with a spectroscopic redshift of z=6.146. T2c is part of a larger structure amplified by the Hubble Frontier Field galaxy cluster MACSJ0416, …

Euclid. I. Overview of the Euclid mission

Y. Mellier, J.A. Acevedo Barroso, A. Achúcarro, Jiřı́ Adámek et autres

The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015-2025 programme of the European Space Agency …

fr, us, ch, nl, es, it, gb, pt, de, be, ca, au (code pays fourni par la source)

Euclid preparation

S. E. van Mierlo, K. I. Caputi, M. Ashby, Hakim Atek et autres

A&A, 666, A200 (2022), https://doi.org/10.1051/0004-6361/202243950

nl, us, fr, it, gb, dk, es, pt, ch, de, ca, no, fi (code pays fourni par la source)

Early results from GLASS-JWST. VII: evidence for lensed, gravitationally bound proto-globular clusters at z=4 in the Hubble Frontier Field A2744

E. Vanzella, M. Castellano, P. Bergamini, Tommaso Treu et autres

We investigate the blue and optical rest-frame sizes (lambda~2300A-4000A) of three compact star-forming regions in a galaxy at z=4 strongly lensed (x30, x45, x100) by the Hubble Frontier Field galaxy cluster A2744 using GLASS-ERS JWST/NIRISS imaging at 1.15um, 1.50mu and 2.0mu with …