Publications (28)
Astrochemistry: From primordial gas to present-day clouds
Dominik R. G. Schleicher, Stefano Bovino, Bastian Körtgen +2
Astrochemistry plays a central role during the process of star formation, both in the primordial regime as well as in the present-day Universe. We revisit here the chemistry in bot…
A chemical model for the interstellar medium in galaxies
Stefano Bovino, Tommaso Grassi, Pedro R. Capelo +2
We present and test chemical models for three-dimensional hydrodynamical simulations of galaxies. We explore the effect of changing key parameters such as metallicity, radiation an…
Ultraviolet H luminescence in molecular clouds induced by cosmic rays
Marco Padovani, Daniele Galli, Liam H. Scarlett +5
Galactic cosmic rays (CRs) play a crucial role in ionisation, dissociation, and excitation processes within dense cloud regions where UV radiation is absorbed by dust grains and ga…
The effect of non-equilibrium metal cooling on the interstellar medium
Pedro R. Capelo, Stefano Bovino, Alessandro Lupi +2
By using a novel interface between the modern smoothed particle hydrodynamics code GASOLINE2 and the chemistry package KROME, we follow the hydrodynamical and chemical evolution of…
Approximating Rayleigh Scattering in Exoplanetary Atmospheres using Physics-informed Neural Networks (PINNs)
David Dahlbüdding, Karan Molaverdikhani, Barbara Ercolano +1
This research introduces an innovative application of physics-informed neural networks (PINNs) to tackle the intricate challenges of radiative transfer (RT) modeling in exoplanetar…
CO Diffusion on Interstellar Amorphous Solid Water: A Computational Study
Francesco Benedetti, Mauro Satta, Tommaso Grassi +2
Surface chemistry on interstellar dust grains is recognized as a central component in astrochemical models, representing a plausible formation route for many of the observed comple…
On the low ortho-to-para H2 ratio in star-forming filaments
Alessandro Lupi, Stefano Bovino, Tommaso Grassi
The formation of stars and planetary systems is a complex phenomenon, which relies on the interplay of multiple physical processes. Nonetheless, it represents a crucial stage for o…
Implementation of chemistry in the Athena++ code
Munan Gong, Ka-Wai Ho, James M. Stone +6
Chemistry plays a key role in many aspects of astrophysical fluids. Atoms and molecules are agents for heating and cooling, determine the ionization fraction, serve as observationa…
Photoevaporation of protoplanetary discs with PLUTO+PRIZMO I. Lower X-ray-driven mass-loss rates due to enhanced cooling
Andrew D. Sellek, Tommaso Grassi, Giovanni Picogna +3
Context: Photoevaporation is an important process for protoplanetary disc dispersal but there has so far been a lack of consensus from simulations over the mass-loss rates and the…
The Astrochemistry Low-energy Electron Cross-Section (ALeCS) database I. Semi-empirical electron-impact ionization cross-section calculations and ionization rates
Brandt A. L. Gaches, Tommaso Grassi, Stefan Vogt-Geisse +6
(Abridged) Electron-molecule interaction is a fundamental process in radiation-driven chemistry in space, from the interstellar medium to comets. Therefore, knowledge of interactio…
Binding Energy Evaluation Platform: A database of quantum chemical binding energy distributions for the astrochemical community
Giulia M. Bovolenta, Stefan Vogt-Geisse, Stefano Bovino +1
The quality of astrochemical models is highly dependent on reliable binding energy (BE) values that consider the morphological and energetic variety of binding sites on the surface…
Cosmic rays in molecular clouds probed by H rovibrational lines -- Perspectives for the James Webb Space Telescope
Marco Padovani, Shmuel Bialy, Daniele Galli +7
Cosmic rays (CRs) at sub-TeV energies play a fundamental role in the chemical and dynamical evolution of molecular clouds, as they control the ionisation, dissociation, and excitat…
Atmospheric retrieval evidence for water isotopologue HDO on exoplanet WASP-39b
Fabian Gruebel, Karan Molaverdikhani, Barbara Ercolano +5
Hydrogen-isotopologues are commonly used to trace the chemical processing and origin of hydrogen-bearing species throughout the Universe, however, their abundance remains unconstra…
Probing the ion-neutral drift velocity towards the L1544 prestellar core: Detection of ambipolar diffusion using ND and para-NHD
Doris Arzoumanian, Silvia Spezzano, Tommaso Grassi +9
The dynamical role of the magnetic field in the star formation process is tightly linked to the coupling between matter and the field. This coupling is due to the interaction betwe…
Non-ideal magnetohydrodynamics of self-gravitating filaments
Nicol Gutiérrez-Vera, Tommaso Grassi, Stefano Bovino +3
Filaments have been studied in detail through observations and simulations. A range of numerical works have separately investigated how chemistry and diffusion effects, as well as…
High level ab initio binding energy distribution of molecules on interstellar ices: Hydrogen fluoride
Giulia Bovolenta, Stefano Bovino, Esteban Vöhringer-Martinez +3
The knowledge of the binding energy of molecules on astrophysically relevant ices can help to obtain an estimate of the desorption rate, i.e. the molecules residence time on the su…
Formation and Evolution of Early-Type Galaxies. III Star formation history as a function of mass and over-density
Emiliano Merlin, Cesare Chiosi, Lorenzo Piovan +3
We investigate the influence of the initial proto-galaxies over-densities and masses on their evolution, to understand whether the internal properties of the proto-galactic haloes…
Carbox: an end-to-end differentiable astrochemical simulation framework
Gijs Vermariën, Tommaso Grassi, Marie Van de Sande +6
Since the first observations of interstellar molecules, astrochemical simulations have been employed to model and understand its formation and destruction path- ways. With the adve…
Presence of liquid water during the evolution of exomoons orbiting ejected free-floating planets
Giulia Roccetti, Tommaso Grassi, Barbara Ercolano +4
Free-floating planets (FFPs) can result from dynamical scattering processes happening in the first few million years of a planetary system's life. Several models predict the possib…
Modelling H and its effects on star formation using a joint implementation of GADGET-3 and KROME
Emanuel Sillero, Patricia B. Tissera, Diego G. Lambas +5
We present P-GADGET3-K, an updated version of GADGET3, that incorporates the chemistry package KROME. P-GADGET3-K follows the hydrodynamical and chemical evolution of cosmic struct…
Habitability of Tidally Heated H-Dominated Exomoons around Free-Floating Planets
David Dahlbüdding, Tommaso Grassi, Karan Molaverdikhani +4
Exomoons around free-floating planets (FFPs) can survive their host planet's ejection. Such ejections can increase their orbital eccentricity, providing significant tidal heating i…
Formation of protostars and the launching of stellar core outflows with moving-mesh radiation non-ideal magnetohydrodynamics
Alexander C. Mayer, Rüdiger Pakmor, Thorsten Naab +5
We present an implementation of radiative transfer with flux-limited diffusion (FLD) for the moving-mesh code {\small AREPO} and use the method in a physical model for the formatio…
H ortho-to-para conversion on grains: A route to fast deuterium fractionation in dense cloud cores?
Stefano Bovino, Tommaso Grassi, Dominik R. Schleicher +1
Deuterium fractionation, i.e. the enhancement of deuterated species with respect to the non-deuterated ones, is considered to be a reliable chemical clock of star-forming regions.…
Lampray: Multi-group long characteristics ray tracing for adaptive mesh radiation hydrodynamics
Troels Frostholm, Troels Haugbølle, Tommaso Grassi
We present Lampray: a multi-group long characteristics ray tracing method for adaptive mesh radiation hydrodynamics in the Ramses code. It avoids diffusion, captures shadows, and t…
Protostellar disks in their natural habitat -- the formation of protostars and their accretion disks in the turbulent and magnetized interstellar medium
Alexander C. Mayer, Thorsten Naab, Paola Caselli +6
We present simulations of the supernova-driven turbulent interstellar medium (ISM) in a simulation domain of volume within which we resolve the formation of pro…
Presence of water on exomoons orbiting free-floating planets: a case study
Patricio Javier Ãvila, Tommaso Grassi, Stefano Bovino +4
A free-floating planet is a planetary-mass object that orbits around a non-stellar massive object (e.g. a brown dwarf) or around the Galactic Center. The presence of exomoons orbit…
The chemical evolution of self-gravitating primordial disks
Dominik R. G. Schleicher, Stefano Bovino, Muhammad A. Latif +2
Numerical simulations show the formation of self-gravitating primordial disks during the assembly of the first structures in the Universe, in particular during the formation of Pop…
EvoL: The new Padova T-SPH parallel code for cosmological simulations - I. Basic code: gravity and hydrodynamics
Emiliano Merlin, Umberto Buonomo, Tommaso Grassi +2
We present EvoL, the new release of the Padova N-body code for cosmological simulations of galaxy formation and evolution. In this paper, the basic Tree + SPH code is presented and…