Injection of freshly synthesized Ca-41 in the early solar nebula by an asymptotic giant branch star

Abstract

view Abstract Citations (82) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Injection of Freshly Synthesized 41Ca in the Early Solar Nebula by an Asymptotic Giant Branch Star Wasserburg, G. J. ; Gallino, R. ; Busso, M. ; Goswami, J. N. ; Raiteri, C. M. Abstract We show that ejecta from the envelope of one asymptotic giant branch star of M is approximately 3 solar mass may account for many of the short-lived nuclei in the early solar system and also for the recent evidence of the presence of Ca-41 (bar-tau41 = 1.50 x 105 yr) in early solar nebular condensates. This would require that the injection into the protosolar molecular cloud took place within a narrow time interval of (5-7) x 105 yr before the formation of the solar system. If true, this places extremely tight constraints on the whole process of injection mixing and collapse. The timescales for both Ca-41 and Al-26 require that the placental medium be a dense molecular cloud (2 x 103 -8 x 103( H/cc. If the observed residual Ca-41 is instead produced by a proton bombardment mechanism within the early solar system, similar to what appears necessary to explain Mn-53, then the time interval is relaxed but would still be (1-2) x 106 yr from consideration of Al-26. Publication: The Astrophysical Journal Pub Date: February 1995 DOI: 10.1086/187771 Bibcode: 1995ApJ...440L.101W Keywords: Abundance; Asymptotic Giant Branch Stars; Calcium Isotopes; Molecular Clouds; Solar System Evolution; Aluminum 26; Nuclear Fusion; Astrophysics; ISM: ABUNDANCES; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; SOLAR SYSTEM: FORMATION; STARS: AGB AND POST-AGB full text sources ADS | data products SIMBAD (1)