Search Publications
The ALPINE-ALMA [CII] survey: Double stellar population and active galactic nucleus activity in a galaxy at z ∼ 5.5
Pozzi, F.; Schaerer, D.; Marques-Chaves, R. +16 more
Context. GDS J033218.92-275302.7 (here GS-14) is a z ∼ 5.5 galaxy with unusual UV spectral features that have been interpreted as signatures of either a double stellar population or of an active galactic nucleus (AGN). GS-14 was detected in [C II] 158 µm as part of the ALPINE survey and was found to be the galaxy with the lowest molecular ga…
WEAVE-StePS: A stellar population survey using WEAVE at WHT
Bolzonella, M.; Gullieuszik, M.; Moretti, A. +45 more
Context. The upcoming new generation of optical spectrographs on four-meter-class telescopes will provide valuable opportunities for forthcoming galaxy surveys through their huge multiplexing capabilities, excellent spectral resolution, and unprecedented wavelength coverage.
Aims: WEAVE is a new wide-field spectroscopic facility mounted on th…
3D tomography of the giant Lyα nebulae of z ≈ 3-5 radio-loud AGN
Noirot, Gaël; Lehnert, Matthew D.; De Breuck, Carlos +12 more
Lyα emission nebulae are ubiquitous around high-redshift galaxies and are tracers of the gaseous environment on scales out to ≳100 pkpc (proper kiloparsec). High-redshift radio galaxies (HzRGs, type-2 radio-loud quasars) host large-scale nebulae observed in the ionised gas differ from those seen in other types of high-redshift quasars. In this wor…
Probing the physics in the core boundary layers of the double-lined B-type binary KIC 4930889 from its gravito-inertial modes
Aerts, C.; Tkachenko, A.; Van Reeth, T. +1 more
Context. Stellar evolution models of B-type stars are still uncertain in terms of internal mixing properties, notably in the area between the convective core and the radiative envelope. This impacts age determination of such stars in addition to the computation of chemical yields produced at the end of their life.
Aims: We investigated the th…
The β Pictoris system: Setting constraints on the planet and the disk structures at mid-IR wavelengths with NEAR
Boccaletti, Anthony; Pantin, Eric; Baruteau, Clément +26 more
Context. β Pictoris is a young nearby system hosting a well-resolved edge-on debris disk, along with at least two exoplanets. It offers key opportunities for carrying out detailed studies of the evolution of young planetary systems and their shaping soon after the end of the planetary formation phase.
Aims: We analyzed high-contrast coronagra…
A spectacular jet from the bright 244-440 Orion proplyd: The MUSE NFM view
Robberto, M.; Facchini, S.; Manara, C. F. +8 more
In this work we present the highest spatial and spectral resolution integral field observations to date of the bipolar jet from the Orion proplyd 244-440 using Multi-Unit Spectroscopic Explorer (MUSE) narrow-field mode (NFM) observations on the Very Large Telescope (VLT). We observed a previously unreported chain of six distinct knots in a roughly…
Image enhancement with wavelet-optimized whitening
Auchère, F.; Buchlin, É.; Soubrié, E. +1 more
Context. Due to its physical nature, the solar corona exhibits large spatial variations of intensity that make it difficult to simultaneously visualize the features present at all levels and scales. Many general-purpose and specialized filters have been proposed to enhance coronal images. However, most of them require the ad hoc tweaking of parame…
Revisiting empirical solar energetic particle scaling relations. I. Solar flares
Veronig, Astrid M.; Papaioannou, Athanasios; Herbst, Konstantin +3 more
Aims: The possible influence of solar superflares on the near-Earth space radiation environment are assessed through the investigation of scaling laws between the peak proton flux and fluence of solar energetic particle (SEP) events with the solar flare soft X-ray peak photon flux.
Methods: We compiled a catalog of 65 well-connected (W20…
Characterization and dynamics of the peculiar stream Jhelum. A tentative role for the Sagittarius dwarf galaxy
Helmi, Amina; Woudenberg, Hanneke C.; Balbinot, Eduardo +1 more
Context. Stellar streams are a promising tool to study the Milky Way's dark matter subhalo population, as interactions with subhalos are expected to leave visible imprints in the streams in the form of substructure. However, there may be other causes of substructure.
Aims: Here we studied the kinematics and the unusual morphology of the stell…
Exploring the low-mass regime of galaxy-scale strong lensing: Insights into the mass structure of cluster galaxies
Grillo, C.; Rosati, P.; Vanzella, E. +8 more
Context. Several recent studies have highlighted a discrepancy between the strong lensing (SL) properties of observed cluster galaxies and the predictions of Λ cold dark matter (CDM) cosmological hydrodynamical simulations. This discrepancy can be interpreted as the result of observed cluster members being more compact than their simulated counter…