714 citations · 5.8k across the 94 of their papers we have counts for
48 papers · 1 filter
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…
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…
The metallicity distribution of the halo and the satellites of the Milky way in the hierarchical merging paradigm
Nikos Prantzos
To account for the observed differential metallicity distribution (DMD) of the Milky Way halo, a semi-analytical model is presented in the framework of the hierarchical merging par…
An Introduction to Galactic Chemical Evolution
Nikos Prantzos
The formalism of the simple model of galactic chemical evolution (GCE) and its main ingredients (stellar properties, initial mass function, star formation rate and gas flows) are p…
Light nuclei in galactic globular clusters : constraints on the self-enrichment scenario from nucleosynthesis
Nikos Prantzos, Corinne Charbonnel, Christian Iliadis
Hydrogen-burning is the root cause of the star-to-star abundance variations of light nuclei in Galactic globular clusters (GC). In the present work we constrain the physical condit…
Origin and evolution of the light nuclides
Nikos Prantzos
After a short historical (and highly subjective) introduction to the field, I discuss our current understanding of the origin and evolution of the light nuclides D, He-3, He-4, Li-…
On the early chemical evolution of the Milky Way
Nikos Prantzos
A few topics concerning the early chemical evolution of the Milky Way are critically discussed. In particular, it is argued that: 1) Observed abundance patterns of extremely metal…
On the "Galactic Habitable Zone"
Nikos Prantzos
The concept of Galactic Habitable Zone (GHZ) was introduced a few years ago as an extension of the much older concept of Circumstellar Habitable Zone. However, the physical process…
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…
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…
On the self-enrichment scenario of galactic globular clusters: Constraints on the IMF
Nikos Prantzos, Corinne Charbonnel
Galactic globular cluster (GC) stars exhibit abundance patterns which are not shared by their field counterparts, In the framework of the widely accepted "self-enrichment" scenario…
Microquasar Jet Irradiation of the Proto-Solar Nebula?
Yousaf Butt, Nikos Prantzos
We explore the possibility that a now-extinct microquasar may have irradiated the proto-solar neighborhood, causing the 'anomalously' high local 11B/10B isotopic ratio. Given the p…
On the intensity and spatial morphology of the 511 keV emission in the Milky Way
Nikos Prantzos
The positron emissivity of the Galactic bulge and disk, resulting from radioactivity of SNIa, is reassessed in the light of a recent evaluation of the SNIa rate. It is found that t…
The energetics, evolution, and stellar depletion of Li6 in the early Galaxy
Nikos Prantzos
Motivated by the recent report of a high Li6 ``plateau'' extending to low metallicities in Galactic halo stars, we study the energetics of an early production of Li6 through the in…
The Role of Single Stars of Low and Intermediate Mass in Galactic Chemical Evolution
Nikos Prantzos
A short overview is presented of the role that Low and Intermediate mass stars play in Galactic Chemical Evolution; their action affects key elements and isotopes, like deuterium,…
Astrophysical constraints from gamma-ray spectroscopy
Roland Diehl, Nikos Prantzos, Peter von Ballmoos
Gamma-ray lines from cosmic sources provide unique isotopic information, since they originate from energy level transitions in the atomic nucleus. Gamma-ray telescopes explored thi…
Li, Be, B and Cosmic Rays in the Galaxy
Nikos Prantzos
A short overview is presented of current issues concerning the production and evolution of Li, Be and B in the Milky Way. It is argued that the currently popular idea that Galactic…
The early phases of Milky Way's chemical evolution
Nikos Prantzos
The earliest phases of the chemical evolution of our Galaxy are analysed in the light of the recent VLT results (concerning abundance patterns in the most metal-poor stars of the G…
Astrophysical gamma-ray lines: a probe of stellar nucleosynthesis and star formation
Nikos Prantzos
Astrophysical gamma-ray spectroscopy is a most valuable tool for studying nuclear astrophysics, as well as recent star formation in the Milky Way. After a short, historical, introd…
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.…
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…
On the relative frequencies of core-collapse supernovae sub-types: the role of progenitor metallicity
Nikos Prantzos, Samuel Boissier
We show that the observed ratio of the subtypes Ib,c and II core-collapse supernovae depends on the metallicity of the host galaxy, as expected on theoretical grounds. However, the…
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 early evolution of the Galactic Halo
Nikos Prantzos
It is shown that the low metallicity tail of the stellar metallicity distribution predicted by simple Outflow models for the Milky Way halo depends sensitively on whether Instantan…