Search Publications
A determination of the Large Magellanic Cloud dark matter subhalo mass using the Milky Way halo stars in its gravitational wake
Fushimi, K. J.; Mosquera, M. E.; Dominguez, M.
Aims: Our goal is to study the gravitational effects caused by the passage of the Large Magellanic Cloud (LMC) in its orbit on the stellar halo of the Milky Way.
Methods: We employed Gaia Data Release 3 to construct a halo tracers dataset consisting of K-giant stars and RR-Lyrae variables. Additionally, we compared the data with a theore…
The impact of stellar bars on star-formation quenching: Insights from a spatially resolved analysis in the local Universe
Bisigello, Laura; Gruppioni, Carlotta; Rodighiero, Giulia +8 more
Context. Stellar bars are common morphological structures in the local Universe; according to optical and NIR surveys, they are present in about two-thirds of disc galaxies. These elongated structures are also believed to play a crucial role in secular evolutionary processes, because they are able to efficiently redistribute gas, stars, and angula…
Constraining the overcontact phase in massive binary evolution: III. Period stability of known B+B and O+B overcontact systems
Mahy, Laurent; Abdul-Masih, Michael; Marchant, Pablo +3 more
Context. Binary systems play a crucial role in massive star evolution. Systems composed of B-type and O-type stars are of particular interest due to their potential to lead to very energetic phenomena or the merging of exotic compact objects. Aims. We aim to determine the orbital period variations of a sample of B+B and O+B massive overcontact bin…
The RAdio Galaxy Environment Reference Survey (RAGERS): Evidence of an anisotropic distribution of submillimeter galaxies in the 4C 23.56 protocluster at z = 2.48
Liu, Y.; Greve, T. R.; Kohno, K. +41 more
Context. High-redshift radio(-loud) galaxies (HzRGs) are massive galaxies with powerful radio-loud active galactic nuclei (AGNs) and serve as beacons for protocluster identification. However, the interplay between HzRGs and the large-scale environment remains unclear. Aims. To understand the connection between HzRGs and the surrounding obscured st…
Quasar 3C 47: Extreme Population B jetted source with double-peaked profiles
Pović, Mirjana; Marziani, Paola; Deconto Machado, Alice +3 more
Context. An optically thick, geometrically thin accretion disk (AD) around a supermassive black hole might contribute to broad-line emission in type 1 active galactic nuclei (AGN). However, the emission line profiles are most often not immediately consistent with the profiles expected from a rotating disk. The extent to which an AD in AGN contribu…
Charting the Lyman-α escape fraction in the range 2.9 < z < 6.7 and consequences for the LAE reionisation contribution
Laporte, N.; Nanayakkara, T.; Pello, R. +5 more
Context. The escape of Lyman-α photons at redshifts greater than two is an ongoing subject of study and an important quantity to further understanding of Lyman-α emitters (LAEs), the transmission of Lyman-α photons through the interstellar medium and intergalactic medium, and the impact these LAEs have on cosmic reionisation. Aims. This study aims…
Differential reddening in 48 globular clusters: An end to the quest for the intracluster medium
Bianchi, S.; Hunt, L. K.; Rainer, M. +9 more
For decades, it has been theorized that a tenuous but detectable intracluster medium should be present in globular clusters, which is continuously replenished by the gas and dust ejected by bright giants and periodically cleared by interactions with the Galactic disk. However, dedicated searches, especially in infrared and radio wavelengths, have …
Modeling the spectral energy distribution of starburst galaxies. The role of photodissociation regions
Buat, V.; Boquien, M.; Burgarella, D. +3 more
Context. Analyzing multiwavelength observations of galaxies from the far-ultraviolet to the millimeter domains provides a wealth of information on the physical properties of galaxies and their evolution across cosmic time. Existing or upcoming ground-based or space-borne facilities with enhanced sensitivities and resolutions open an unprecedented …
Star-by-star dynamical evolution of the physical pair of the Collinder 135 and UBC 7 open clusters
Berczik, Peter; Just, Andreas; Kovaleva, Dana A. +8 more
Context. In a previous paper using Gaia DR2 data, we demonstrated that the two closely situated open clusters Collinder 135 and UBC 7 might have formed together about 50 Myr ago.
Aims: In this work, we performed star-by-star dynamical modelling of the evolution of the open clusters Collinder 135 and UBC 7 from their supposed initial state to …
The Radcliffe wave as traced by young open clusters: Stellar parameters, activity indicators, and abundances of solar-type members of eight young clusters
Vallenari, A.; Bragaglia, A.; Frasca, A. +7 more
The Radcliffe wave has only recently been recognised as a ≈3 kpc long coherent gas structure encompassing most of the star-forming regions in the solar vicinity. Since its discovery, it has been mainly studied from the perspective of dynamics, but a detailed chemical study is necessary to understand its nature and the composition of the natal clou…