Publications (62)
The Gaia-ESO Survey: radial distribution of abundances in the Galactic disc from open clusters and young field stars
L. Magrini, S. Randich, G. Kordopatis +44
The spatial distribution of elemental abundances in the disc of our Galaxy gives insights both on its assembly process and subsequent evolution, and on the stellar nucleogenesis of…
Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way
S. Boissier, N. Prantzos
The chemical and spectro-photometric evolution of spiral galaxies is investigated with detailed models, making use of up-to-date ingredients (like metallicity dependent stellar pro…
From Spirals to Low Surface Brightness galaxies
S. Boissier, D. Monnier Ragaigne, N. Prantzos +2
We show that simple models of the chemical and spectrophotometric evolution of galaxies can be used to explore the properties of present-day galaxies and especially the causes of t…
N-emitters as possible sign-posts of GC formation
D. Schaerer, R. Marques-Chaves, H. Atek +7
Based on the finding of unusual chemical abundance ratios of N-emitters, which resemble those of globular cluster (GC) stars, their compactness, high ISM densities and other proper…
The 511 keV emission from positron annihilation in the Galaxy
N. Prantzos, C. Boehm, A. M. Bykov +9
The first gamma-ray line originating from outside the solar system that was ever detected is the 511 keV emission from positron annihilation in the Galaxy. Despite 30 years of inte…
How did globular clusters lose their gas?
C. Charbonnel, M. Krause, T. Decressin +3
We summarize the results presented in Krause et al. (2012) on the impact of supernova-driven shells and dark-remnant accretion on gas expulsion in globular cluster infancy.
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).X. Formation of a red ultra-diffuse galaxy and an almost dark galaxy during a ram-pressure stripping event
Junais, S. Boissier, A. Boselli +16
The evolution of galaxies depends on their interaction with the surrounding environment. Ultra-diffuse galaxies (UDGs) have been found in large numbers in clusters. We detected a f…
Science with e-ASTROGAM (A space mission for MeV-GeV gamma-ray astrophysics)
A. De Angelis, V. Tatischeff, I. A. Grenier +248
e-ASTROGAM (enhanced ASTROGAM) is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated t…
Disk galaxy evolution: from the Milky Way to high-redshift disks
N. Prantzos
We develop a detailed model of the Milky Way (a ``prototypical'' disk galaxy) and extend it to other disks with the help of some simple scaling relations, obtained in the framework…
Perspectives in Galactic Chemical Evolution studies
N. Prantzos
In this review I focus on a few selected topics, where recent theoretical and/or observational progress has been made and important developments are expected in the future. They in…
N-enhancement in GN-z11: First evidence for supermassive stars nucleosynthesis in proto-globular clusters-like conditions at high redshift ?
C. Charbonnel, D. Schaerer, N. Prantzos +5
Unusually high N/O abundance ratios were recently reported for a very compact, intensively star-forming object GN-z11 at from JWST/NIRSpec observations. We present an empi…
The signature of 44Ti in Cassiopeia A revealed by IBIS/ISGRI on INTEGRAL
M. Renaud, J. Vink, A. Decourchelle +9
We report the detection of both the 67.9 and 78.4 keV 44Sc gamma-ray lines in Cassiopeia A with the INTEGRAL IBIS/ISGRI instrument. Besides the robustness provided by spectro-imagi…
The behaviour of lithium at high metallicity in the Milky Way -- Selection effects in the samples and the possible role of atomic diffusion
C. Charbonnel, S. Borisov, N. Prantzos +1
We revisit large spectroscopic data sets for field stars from the literature to derive the upper Li envelope in the high metallicity regime in our Galaxy. We take advantage of Gaia…
The AMBRE Project: Constraining the lithium evolution in the Milky Way
G. Guiglion, P. de Laverny, A. Recio-Blanco +5
The chemical evolution of lithium in the Milky Way represents a major problem in modern astrophysics. Indeed, lithium is, on the one hand, easily destroyed in stellar interiors, an…
The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars
C. Abia, H. M. Tabernero, S. A. Korotin +25
In this study, abundances of the neutron-capture elements Rb, Sr, and Zr are derived, for the first time, in a sample of nearby M dwarfs. We focus on stars in the metallicity range…
Microquasars as sources of positron annihilation radiation
N. Guessoum, P. Jean, N. Prantzos
We consider the production of positrons in microquasars, i.e. X-ray binary systems that exhibit jets frequently, but not continuously. We estimate the production rate of positrons…
Radial migration in a bar-dominated disk galaxy I: Impact on chemical evolution
M. Kubryk, N. Prantzos, E. Athanassoula
We study radial migration and chemical evolution in a bar-dominated disk galaxy, by analyzing the results of a fully self-consistent, high resolution N-body+SPH simulation. We find…
Properties and Chemical Evolution of the M31 Disk: Comparison with the Milky Way
J. L. Hou, J. Yin, S. Boissier +3
By adopting the chemical evolution model of the Milky Way disk, we have studied the star formation and chemical evolution history for M31 galaxy disk. We mainly concentrated on the…
Metallicity-dependendent kinematics and morphology of the Milky Way bulge
E. Athanassoula, S. A. Rodionov, N. Prantzos
We use N-body chemo-dynamic simulations to study the coupling between morphology, kinematics and metallicity of the bar/bulge region of our Galaxy. We make qualitative comparisons…
Evolution of the Milky Way with radial motions of stars and gas I. The solar neighborhood and the thin and thick disk
M. Kubryk, N. Prantzos, E. Athanassoula
We study the role of radial migration of stars on the chemical evolution of the Milky Way disk. In particular, we are interested in the impact of that process on the local properti…
Evolution of the Milky Way with radial motions of stars and gas II. The evolution of abundance profiles from H to Ni
M. Kubryk, N. Prantzos, E. Athanassoula
We study the role of radial motions of stars and gas on the evolution of abundance profiles in the Milky Way disk. We investigate, in a parametrized way, the impact of radial flows…
Lithium as a probe of stellar and galactic physics
C. Charbonnel, N. Prantzos
Lithium plays a unique role in astrophysics, as it is a powerful diagnostic for the physics and evolution of low-mass stars, Galactic archaeology, and cosmology. We review the Li o…
Astrophysics with Radioactive Atomic Nuclei
R. Diehl, P. von Ballmoos, S. Boggs +11
We propose to advance investigations of electromagnetic radiation originating in atomic nuclei beyond its current infancy to a true astronomy. This nuclear emission is independent…
A perspective on the Milky Way Bulge-Bar as seen from the neutron-capture elements Cerium and Neodymium with APOGEE
J. V. Sales-Silva, K. Cunha, V. V. Smith +28
This study probes the chemical abundances of the neutron-capture elements cerium and neodymium in the inner Milky Way from an analysis of a sample of 2000 stars in the Galact…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).I. Introduction to the Survey
A. Boselli, M. Fossati, L. Ferrarese +56
The Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) is a blind narrow-band Halpha+[NII] imaging survey carried out with MegaCam at the Canada-France-Hawaii Telesc…
The properties of Low Surface Brightness galaxies
D. Monnier Ragaigne, W. van Driel, C. Balkowski +2
A description is given of the samples of Low Surface Brightness galaxies (LSBs) used for comparison with models of their chemical and spectro-photometric evolution (Boissier et al.…
Rubidium abundances in solar metallicity stars
C. Abia, P. de Laverny, S. Korotin +3
A Rb deficiency by a factor two with respect to the Sun has been found in M dwarfs of solar metallicity. This deficiency is difficult to understand from both the observational and…
Revisiting nucleosynthesis in globular clusters: the case of NGC 2808 and the role of He and K
N. Prantzos, C. Charbonnel, C. Iliadis
Motivated by recent reports concerning the observation of limited enrichment in He but excess K in stars of globular clusters, we revisit the H-burning conditions that lead to the…
On the chemical evolution of the Milky Way
N. Prantzos
I discuss three different topics concerning the chemical evolution of the Milky Way (MW). 1) The metallicity distribution of the MW halo; it is shown that this distribution can be…
Production and evolution of Li, Be and B isotopes in the Galaxy
N. Prantzos
We reassess the problem of the production and evolution of the light elements Li, Be and B and of their isotopes in the Milky Way, in the light of new observational and theoretical…
Gamma-Ray Line Astrophysics and Stellar Nucleosynthesis: Perspectives for INTEGRAL
N. Prantzos
Nuclear gamma-ray lines constitute the most genuine diagnostic tool of nuclear astrophysics, since they allow for an unambiguous identification of isotopic species. Continuous impr…
Chemical radial gradients for the bulge-bar stellar populations from the APOGEE survey
J. V. Sales-Silva, K. Cunha, V. V. Smith +20
The Milky Way bulge-bar is composed of multiple populations. Using chemical and kinematical planes, we segregate six populations in a bulge-bar sample observed by the APOGEE survey…
The s- and r- components of the proto-solar composition
N. Prantzos, S. Cristallo, C. Abia
We present a brief overview of the various methods proposed to derive the s- and r-components of the proto-solar chemical composition and we discuss some recent developments in the…
Chemical evolution with rotating massive star yields: I. The solar neighbourhood and the s-process elements
N. Prantzos, C. Abia, M. Limongi +2
We present a comprehensive study of the abundance evolution of the elements from H to U in the Milky Way halo and local disk. We use a consistent chemical evolution model, metallic…
Metallicity in damped Lyman-alpha systems: evolution or bias?
N. Prantzos, S. Boissier
Assuming that damped Lyman-alpha(DLA) systems are galactic discs, we calculate the corresponding evolution of metal abundances. We use detailed multi-zone models of galactic chemic…
Modelling the 1.8 MeV Sky: Tests for Spiral Structure
J. Knoedlseder, N. Prantzos, K. Bennett +6
COMPTEL imaging analysis revealed a patchy, asymmetric distribution of diffuse 1.8 MeV emission along the Galactic plane, which is attributed to the decay of radioactive 26Al in th…
Chemical evolution and depletion pattern in Damped Lyman-alpha (DLA) systems
J. L. Hou, S. Boissier, N. Prantzos
In this paper we point out a previously unnoticed anticorrelation between the observed abundance ratio [X/Zn] (where Zn is assumed to be undepleted and X stands for the refractorie…
GRIPS - Gamma-Ray Imaging, Polarimetry and Spectroscopy
J. Greiner, K. Mannheim, F. Aharonian +65
We propose to perform a continuously scanning all-sky survey from 200 keV to 80 MeV achieving a sensitivity which is better by a factor of 40 or more compared to the previous missi…
A method for quantifying the Gamma Ray Burst "bias". Application in the redshift range 0-1.1
S. Boissier, R. Salvaterra, E. Le Floc'h +5
Long Gamma Ray Bursts (LGRBs) are related to the final stages of evolution of massive stars. As such, they should follow the star formation rate (SFR) of galaxies. We can use them…
Discovery of new N-emitters over a wide redshift range
I. Morel, D. Schaerer, R. Marques-Chaves +5
JWST observations have revealed rare galaxies with UV spectra exhibiting intense lines of nitrogen, indicative of super-solar N/O abundances at low metallicity. To better understan…
Chemo-spectrophotometric evolution of spiral galaxies: III. Abundance and colour gradients in discs
N. Prantzos, S. Boissier
We study the relations between luminosity and chemical abundance profiles of spiral galaxies, using detailed models for the chemical and spectro-photometric evolution of galactic d…
Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
T. Decressin, G. Meynet, C. Charbonnel +2
We propose the Wind of Fast Rotating Massive Stars scenario to explain the origin of the abundance anomalies observed in globular clusters. We compute and present models of fast ro…
Chemo-spectrophotometric evolution of spiral galaxies: V. Properties of galactic discs at high redshift
S. Boissier, N. Prantzos
We explore the implications for the high redshift universe of ``state-of-the-art'' models for the chemical and spectrophotometric evolution of spiral galaxies. The models are based…
Extreme N-emitters at high-redshift: signatures of supermassive stars and globular cluster or black hole formation in action?
R. Marques-Chaves, D. Schaerer, A. Kuruvanthodi +9
[Abridged] Using the JWST/NIRSpec observations from CEERS we found an extreme N-emitter, CEERS-1019 at z=8.6782 showing intense NIV and NIII emission. From the observed rest-UV and…
Milky Way vs Andromeda: a tale of two disks
J. Yin, J. L. Hou, N. Prantzos +4
We study the chemical evolution of the disks of the Milky Way (MW) and of Andromeda (M31), in order to reveal common points and differences between the two major galaxies of the Lo…
Lithium, masses, and kinematics of young Galactic dwarf and giant stars with extreme [/Fe] ratios
S. Borisov, N. Prantzos, C. Charbonnel
Recent spectroscopic explorations of large Galactic stellar samples stars have revealed the existence of red giants with [/Fe] ratios that are anomalously high, given their rel…
The role of massive stars in the turbulent infancy of Galactic globular clusters: Feedback on the intracluster medium, and detailed timeline
C. Charbonnel, M. Krause, T. Decressin +2
A major paradigm shift has recently revolutionized our picture of globular clusters (GC) that were long thought to be simple systems of coeval stars born out of homogeneous materia…
Detailed abundances in a sample of very metal poor stars
P. François, S. Wanajo, E. Caffau +6
Unevolved metal poor stars are the witness of the early evolution of the Galaxy. The determination of their detailed chemical composition is an important tool to understand the che…
Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components
N. Prantzos, C. Abia, S. Cristallo +2
The decomposition of the Solar system abundances of heavy isotopes into their s- and r- components plays a key role in our understanding of the corresponding nuclear processes and…
The AMBRE Project: r-process elements in the Milky Way thin and thick discs
G. Guiglion, P. de Laverny, A. Recio-Blanco +1
The chemical evolution of neutron capture elements in the Milky Way disc is still a matter of debate. We aim to understand the chemical evolution of r-process elements in Milky Way…
Relative frequencies of supernovae types: dependence on host galaxy magnitude, galactocentric radius and local metallicity
S. Boissier, N. Prantzos
Context: Stellar evolution theory suggests that the relationship between number ratios of supernova (SN) types and metallicity holds important clues as to the nature of the progeni…
The AMBRE project: a study of Li evolution in the Galactic thin and thick discs
N. Prantzos, P. de Laverny, G. Guiglion +2
Recent observations suggest a "double-branch" behaviour of Li/H versus metallicity in the local thick and thin discs. This is reminiscent of the corresponding O/Fe versus Fe/H beha…
The Star Formation Rate in disk galaxies: thresholds and dependence on gas amount
S. Boissier, N. Prantzos, A. Boselli +1
We reassess the applicability of the Toomre criterion in galactic disks and we study the local star formation law in 16 disk galaxies for which abundance gradients are published. T…
Radial distribution of stars, gas and dust in SINGS galaxies. III. Modeling the evolution of the stellar component in galaxy disks
J. C. Muñoz-Mateos, S. Boissier, A. Gil de Paz +5
(Abridged) We analyze the evolution of 42 spiral galaxies in the Spitzer Infrared Nearby Galaxies Survey, using extinction-corrected UV, optical and near-infrared radial profiles t…
Radioactive Al26 and Fe60 in the Milky Way: implications of the RHESSI detection of Fe60
N. Prantzos
The recent detection of gamma-ray lines from radioactive Al26 and Fe60 in the Milky Way by the RHESSI satellite calls for a reassessment of the production sites of those nuclides.…
Chemical and spectrophotometric evolution of Low Surface Brightness galaxies
S. Boissier, D. Monnier Ragaigne, N. Prantzos +3
Based on the results of recent surveys, we have constructed a relatively homogeneous set of observational data concerning the chemical and photometric properties of Low Surface Bri…
On the 511 keV emission line of positron annihilation in the Milky Way
N. Prantzos
I review our current understanding of positron sources in the Galaxy, on the basis of the reported properties of the observed 511 keV annihilation line. It is argued here that most…
The chemical evolution of the Milky Way in a cosmological context
N. Prantzos
A short overview is presented of several topics concerning the evolution of the Milky Way (MW) in a cosmological context. In particular, the metallicity distribution of the MW halo…
{Chemo-spectrophotometric evolution of spiral galaxies: IV. Star formation efficiency and effective ages of spirals
S. Boissier, A. Boselli, N. Prantzos +1
We study the star formation history of normal spirals by using a large and homogeneous data sample of local galaxies. For our analysis we utilise detailed models of chemical and sp…
On the origin and composition of Galactic cosmic rays
N. Prantzos
The composition of Galactic Cosmic Rays (GCR) presents strong similarities to the standard (cosmic) composition, but also noticeable differences, the most important being the high…
Chemo-spectrophotometric evolution of spiral galaxies: II. Main properties of present day disk galaxies
S. Boissier, N. Prantzos
We study the chemical and spectro-photometric evolution of galactic disks with detailed models calibrated on the Milky Way and using simple scaling relations, based on currently po…
Abundance gradients and their evolution in the Milky Way disk
J. L. Hou, N. Prantzos, S. Boissier
Based on a simple, but fairly successful, model of the chemical evolution of the Milky Way disk, we study the evolution of the abundances of the elements He, C, N, O, Ne, Mg, Al, S…