Chemical evolution of ${}^{26}$Al and ${}^{60}$Fe in the Milky Way

Abstract

We present theoretical mass estimates of ${}^{26}$Al and ${}^{60}$Fe throughout the Galaxy, performed with a numerical chemical evolution model including detailed nucleosynthesis prescriptions for stable and radioactive nuclides. We compared the results for several sets of stellar yields taken from the literature, for massive, low and intermediate mass stars, nova systems (only for ${}^{26}$Al) and supernovae Type Ia.We then computed the total masses of ${}^{26}$Al and ${}^{60}$Fe in the Galaxy. We studied the bulge and the disc of the Galaxy in a galactocentric radius range 0-22 kpc. We assumed that the bulge region (within 2 kpc) evolved quickly suffering a strong star formation burst, while the disc formed more slowly and inside-out. We compared our results with the ${}^{26}$Al mass observed by the $\gamma$-ray surveys COMPTEL and INTEGRAL to select the best model. Concerning ${}^{60}$Fe, we do not have any observed mass value so we just performed a theoretical prediction for future observations. In conclusion, low, intermediate mass stars and Type Ia supernovae contribute negligibly to the two isotopes, while massive stars are the dominant source. The nova contribution is, however, necessary to reproduce the observations of ${}^{26}$Al. Our best model predicts $2.12$ M${}_{\odot }$ of ${}^{26}$Al, in agreement with observations, while for ${}^{60}$Fe our best mass estimate is $\sim 1.05$ M${}_{\odot }$. We also predicted the present injection rate of ${}^{26}$Al and ${}^{60}$Fe in the Galaxy and compared it with previous results, and we found a larger present time injection rate along the disc.

arXiv commentaccepted,10 pages, 6 figures

References in corpus (40)

• The chemical composition of the Sun
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• The Chemical Evolution of the Galaxy: the two-infall model
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Updated stellar yields from Asymptotic Giant Branch models
• Abundance Gradients and the Formation of the Milky Way
• Presupernova evolution and explosive nucleosynthesis of rotating massive stars in the metallicity range -3 <=[Fe/H]<= 0
• Nucleosynthesis in Classical Novae: ONe vs. CO White Dwarfs
• The nucleosynthesis of Al26 and Fe60 in solar metallicity stars extending in mass from 11 to 120 Msun: the hydrostatic and explosive contributions
• Quantifying the uncertainties of chemical evolution studies. II. Stellar yields
• Chemical evolution with rotating massive star yields: I. The solar neighbourhood and the s-process elements
• The HST Key Project on the Extragalactic Distance Scale XIII. The Metallicity Dependence of the Cepheid Distance Scale
• On the typical timescale for the chemical enrichment from SNeIa in Galaxies
• Solar System Abundances of the Elements
• Stars, Gas, and Dark Matter in the Solar Neighborhood
• Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
• Super and Massive AGB Stars: II - Nucleosynthesis and Yields - Z=0.02, 0.008 and 0.004
• A Determination of the Thick Disk Chemical Abundance Distribution: Implications for Galaxy Evolution
• 26Al and 60Fe From Supernova Explosions
• Super and massive AGB stars - III. Nucleosynthesis in metal-poor and very metal-poor stars - Z=0.001 and 0.0001
• The AMBRE Project: chemical evolution models for the Milky Way thick and thin discs
• The evolution of CNO isotopes: the impact of massive stellar rotators
• Classical novae from the POINT-AGAPE microlensing survey of M31 -- II. Rate and statistical characteristics of the nova population
• The Galactic Nova Rate Revisited
• Nova nucleosynthesis and Galactic evolution of the CNO isotopes
• Observations of Galactic and Extragalactic Novae
• Radioactive 26Al from the Scorpius-Centaurus Association
• Star formation history of the Galactic bulge from deep HST imaging of low reddening windows
• Chemical evolution of the Milky Way: constraints on the formation of the thick and thin discs
• The origin of stellar populations in the Galactic bulge from chemical abundances
• New insights on the Galactic Bulge Initial Mass Function
• Galactic Chemical Evolution of Radioactive Isotopes
• The mass surface density in the local disk and the chemical evolution of the Galaxy
• On the variation of carbon abundance in galaxies and its implications
• Galactic astroarchaeology: reconstructing the bulge history by means of the newest data
• Modelling the chemical evolution of Zr, La, Ce and Eu in the Galactic discs and bulge
• Aluminium-26 from massive binary stars II. Rotating single stars up to core-collapse and their impact on the early Solar System
• Chemical evolution of the Galactic Center
• Constraints on the kinematics of the 44Ti ejecta of Cassiopeia A from INTEGRAL/SPI
• Modelling the chemical evolution of the Milky Way

Cited by in corpus (9)

• 2D chemical evolution models II. Effects of multiple spiral arm patterns on O, Eu, Fe and Ba abundance gradients
• Eta-Earth Revisited II: Deriving a Maximum Number of Earth-like Habitats in the Galactic Disk
• Evolution of radioactive elements in the LMC: predictions for future gamma-ray surveys
• Impact of newly measured 26Al(n, p)26Mg and 26Al(n, α)23Na reaction rates on the nucleosynthesis of 26Al in stars
• Impact of Newly Measured Nuclear Reaction Rates on ${}^{26}$Al Ejected Yields from Massive Stars
• Binary stellar evolution yields in galactic chemical evolution calculations
• Gamma-ray line emission from the Local Bubble
• The aluminium-26 distribution in a cosmological simulation of a Milky Way-type Galaxy
• Trans-Fe elements from Type Ia Supernovae. I. Heavy element nucleosynthesis during the formation of near-Chandrasekhar white dwarfs