Heterogeneous evolution of the galaxy and the origin of the short-lived nuclides in the early solar systemOPEN ACCESS 

· by · in ,

T. Kaur, S. Sahijpal

Accepted for MNRAS

PDF (OPEN ACCESS)

“We present galactic chemical evolution (GCE) models of the short-lived radionuclides (SLRs), 26Al, 36Cl, 41Ca, 53Mn and 60Fe, across the entire Milky Way galaxy. The objective is to understand the spatial and temporal distribution of the SLRs in the galaxy. The gamma-ray observations infer widespread distribution of 26Al and 60Fe across the galaxy. The signatures of the SLRs in the early solar system (ESS) are found in meteorites. We present homogeneous GCE simulation models for SLRs across the galaxy. We also develop a set of heterogeneous GCE models to understand the evolution of the galaxy within independent spatial grids of area, 0.1-1 kpc2. These grids evolve distinctly in terms of nucleosynthetic contributions of massive stars. We succeeded in simulating the formation and evolution of generations of stellar clusters/association. Based on the formulation, we provide a novel method to amalgamate the origin of the solar system with the gradual evolution of the galaxy along with a self-consistent origin of SLRs. We explore the possibility of the birth of the solar system in an environment where one of the stellar clusters formed >25 Million years earlier. The decaying 53Mn and 60Fe remnants from the evolved massive stars from the cluster probably contaminated the local medium associated with the presolar molecular cloud. A Wolf-Rayet wind from a distant massive star, belonging to a distinct cluster, probably contributed, 26Al (and 41Ca) to the presolar cloud. The irradiation production of 7,10Be and 36Cl occurred later in ESS.”

Related posts (automatically generated):

  1. Inheritance of solar short- and long-lived radionuclides from molecular clouds and the unexceptional nature of the solar system
  2. Nucleosynthesis of an 11.8 M ⊙ Supernova with 3D Simulation of the Inner Ejecta: Overall Yields and Implications for Short-lived Radionuclides in the Early Solar System
  3. The effects of short-lived radionuclides and porosity on the early thermo-mechanical evolution of planetesimals
  4. Fe-Ni and Al-Mg isotope records in UOC chondrules: Plausible stellar source of 60Fe and other short-lived nuclides in the early Solar System
  5. On the Injection of Short-lived Radionuclides from a Supernova into the Solar Nebula: Constraints from the Oxygen Isotopes
  6. Bayes’ theorem and early solar short-lived radionuclides: the case for an unexceptional origin for the solar systemOPEN ACCESS 
  7. Short-Lived Radionuclides in Meteorites and the Sun’s Birth EnvironmentOPEN ACCESS 
  8. Statistical Chronometry of Meteorites. II. Initial Abundances and Homogeneity of Short-lived RadionuclidesOPEN ACCESS 
  9. Early solar system chronology from short-lived chronometersOPEN ACCESS 
  10. Origin of the Short-lived Radionuclide 10Be and Its Implications for the Astronomical Setting of CAI Formation in the Solar Protoplanetary Disk
Tags: , , , , , ,