Search Publications
LIME: A LIne MEasuring library for large and complex spectroscopic data sets. I. Implementation of a virtual observatory for JWST spectra
Morisset, C.; Amorín, R.; Firpo, V. +1 more
Context. The upcoming generation of telescopes, instruments, and surveys is poised to usher in an unprecedented "Big Data" era in the field of astronomy. Within this context, even seemingly modest tasks such as spectral line analyses could become increasingly challenging for astronomers.
Aims: In this paper, we announce the release of LIME. T…
The tangled warp of the Milky Way
McMillan, Paul J.; Jónsson, Viktor Hrannar
Aims: We aim to determine the influence of the Milky Way's warp on the kinematics of stars across the disc, and therefore measure its precession rate and line of nodes under different assumptions.
Methods: We applied Jeans' first equation to a model of a rigidly precessing warp. The predictions of these models were fitted to the average …
Chemical abundances along the quasar main sequence
Marziani, P.; del Olmo, A.; Czerny, B. +5 more
Context. The main sequence of quasars has emerged as a powerful tool for organizing the observational and physical characteristics of type-1 active galactic nuclei (AGNs). Aims. In this study, we present a comprehensive analysis of the metallicity of the gas in the broad-line region, incorporating both new data and previously published findings, t…
ALMA-IMF: XV. Core mass function in the high-mass star formation regime
Galván-Madrid, R.; Cunningham, N.; Braine, J. +38 more
The stellar initial mass function (IMF) is critical to our understanding of star formation and the effects of young stars on their environment. On large scales, it enables us to use tracers such as UV or Hα emission to estimate the star formation rate of a system and interpret unresolved star clusters across the Universe. So far, there is little f…
JWST's PEARLS: 119 multiply imaged galaxies behind MACS0416, lensing properties of caustic crossing galaxies, and the relation between halo mass and number of globular clusters at z = 0.4
Grogin, Norman A.; Koekemoer, Anton M.; Pirzkal, Nor +26 more
We present a new lens model for the ɀ = 0.396 galaxy cluster MACS J0416.1 –2403 based on a previously known set of 77 spectroscop-ically confirmed, multiply imaged galaxies plus an additional set of 42 candidate multiply imaged galaxies from past HST and new JWST data. The new galaxies lack spectroscopic redshifts but have geometric and/or photome…
Survival of the long-lived inner disk of PDS70
Bae, Jaehan; Benisty, Myriam; Facchini, Stefano +2 more
The K7 T Tauri star PDS 70 remains the best laboratory for investigating the influence of giant planet formation on the structure of the parental disk. One of the most intriguing discoveries is the detection of a resolved inner disk from ALMA observations that extends up to the orbit of PDS 70b. It is challenging to explain this inner disk because…
Dynamical accretion flows: ALMAGAL: Flows along filamentary structures in high-mass star-forming clusters
Avison, A.; Rygl, K. L. J.; Testi, L. +47 more
Context. Investigating the flow of material along filamentary structures towards the central core can help provide insights into high-mass star formation and evolution. Aims. Our main motivation is to answer the question of what the properties of accretion flows are in star-forming clusters. We used data from the ALMA Evolutionary Study of High Ma…
X-Shooting ULLYSES: Massive stars at low metallicity: V. Effect of metallicity on surface abundances of O stars
Bouret, J. -C.; Martins, F.; Hillier, D. J. +10 more
Context. Massive stars rotate faster, on average, than lower mass stars. Stellar rotation triggers hydrodynamical instabilities which transport angular momentum and chemical species from the core to the surface. Models of high-mass stars that include these processes predict that chemical mixing is stronger at lower metallicity. Aims. We aim to tes…
A JWST/MIRI analysis of the ice distribution and polycyclic aromatic hydrocarbon emission in the protoplanetary disk HH 48 NE
van Dishoeck, E. F.; Rocha, W. R. M.; Lis, D. C. +18 more
Context. Ice-coated dust grains provide the main reservoir of volatiles that play an important role in planet formation processes and may become incorporated into planetary atmospheres. However, due to observational challenges, the ice abundance distribution in protoplanetary disks is not well constrained. With the advent of the James Webb Space T…
Interpreting the long-term variability of the changing-look AGN Mrk 1018
Vignali, C.; Cignoni, M.; Matzeu, G. A. +2 more
We present a comprehensive study of the changing-look active galactic nucleus (CL-AGN) Mrk 1018 based on the largest dataset of optical, UV, and X-ray spectro-photometric data ever assembled for this source. Our investigation comprises a detailed analysis of X-ray spectra, broad-band photometry, and optical-to-X-ray spectral energy distribution (S…