Supernova enrichment of planetary systems in low-mass star clusters

Abstract

The presence and abundance of short lived radioisotopes (SLRs) ${}^{26}$Al and ${}^{60}$Fe in chondritic meteorites implies that the Sun formed in the vicinity of one or more massive stars that exploded as supernovae (SNe). Massive stars are more likely to form in massive star clusters ($>$1000 M${}_{\odot }$) than lower mass clusters. However, photoevaporation of protoplanetary discs from massive stars and dynamical interactions with passing stars can inhibit planet formation in clusters with radii of $\sim$1 pc. We investigate whether low-mass (50 - 200 M${}_{\odot }$) star clusters containing one or two massive stars are a more likely avenue for early Solar system enrichment as they are more dynamically quiescent. We analyse $N$-body simulations of the evolution of these low-mass clusters and find that a similar fraction of stars experience supernova enrichment than in high mass clusters, despite their lower densities. This is due to two-body relaxation, which causes a significant expansion before the first supernova even in clusters with relatively low (100 stars pc${}^{-3}$) initial densities. However, because of the high number of low mass clusters containing one or two massive stars, the absolute number of enriched stars is the same, if not higher than for more populous clusters. Our results show that direct enrichment of protoplanetary discs from supernovae occurs as frequently in low mass clusters containing one or two massive stars (>20 M${}_{\odot }$) as in more populous star clusters (1000 M${}_{\odot }$). This relaxes the constraints on the direct enrichment scenario and therefore the birth environment of the Solar System.

arXiv comment8 pages, 7 figures, accepted for publication in MNRAS

References in corpus (57)

• Embedded Clusters in Molecular Clouds
• Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• A Universal Stellar Initial Mass Function? A Critical Look at Variations
• The Birth Environment of the Solar System
• Photoevaporation of Circumstellar Disks due to External FUV Radiation in Stellar Aggregates
• Star cluster ecology IVa: Dissection of an open star cluster---photometry
• The Spatial Distribution of Star Formation in the Solar Neighbourhood: Do all stars form in clusters?
• The statistical Analysis of Star Clusters
• The maximum stellar mass, star-cluster formation and composite stellar populations
• Early Evolution of Stellar Groups and Clusters: Environmental Effects on Forming Planetary Systems
• A Complete N-body Model of the Old Open Cluster M67
• Short-lived Nuclei in the Early Solar System: Possible AGB Sources
• Destruction of protoplanetary disks in the Orion Nebula Cluster
• The dynamical evolution of fractal star clusters: the survival of substructure
• The early dynamical evolution of cool, clumpy star clusters
• Dynamical evolution of star forming regions
• Dynamics of Planetary Systems in Star Clusters
• Ionizing feedback from massive stars in massive clusters III: Disruption of partially unbound clouds
• On the function describing the stellar initial mass function
• Do O-stars form in isolation?
• The Gaia-ESO Survey: Kinematic structure in the Gamma Velorum Cluster
• Solar system genealogy revealed by extinct short-lived radionuclides in meteorites
• Interaction of Supernova Ejecta with Nearby Protoplanetary Disks
• The mmax-Mecl relation, the IMF and IGIMF: probabilistically sampled functions?
• Evolving structures of star-forming clusters
• The dangers of being trigger--happy
• The spatial distribution of stars in open clusters
• On the Similarity between Cluster and Galactic Stellar Initial Mass Functions
• The effects of dynamical interactions on planets in young substructured star clusters
• Planetary dynamics in stellar clusters
• The effects of short-lived radionuclides and porosity on the early thermo-mechanical evolution of planetesimals
• The lost siblings of the Sun
• M67-1194, an unusually Sun-like solar twin in M67
• Young Circumstellar Disks Near Evolved Massive Stars and Supernovae
• Importance of the Initial Conditions for Star Formation - III: Statistical Properties of Embedded Protostellar Clusters
• The chemical compositions of solar twins in the open cluster M67
• The formation of the solar system
• Free-Floating Planets: Not So Surprising
• The Complex Distribution of Recently Formed Stars. Bimodal Stellar Clustering in the Star-Forming Region NGC 346
• The Supernova Triggered Formation and Enrichment of Our Solar System
• Dynamics versus structure: breaking the density degeneracy in star formation
• Maximum stellar mass versus cluster membership number revisited
• Stellar disk destruction by dynamical interactions in the Orion Trapezium star cluster
• Supernova Propagation And Cloud Enrichment: A new model for the origin of ${}^{60}$Fe in the early solar system
• Isotopic enrichment of forming planetary systems from supernova pollution
• Supernova enrichment and dynamical histories of solar-type stars in clusters
• Massive stars reveal variations of the stellar initial mass function in the Milky Way stellar clusters
• The dynamical fate of planetary systems in young star clusters
• Observational constraints on star cluster formation theory - I. The mass-radius relation
• A new age determination Gamma^2 Velorum from binary stellar evolution models
• Gravitational scattering of stars and clusters and the heating of the Galactic disk
• The Role of Massive Agb Stars in the Early Solar System Composition
• The Gaia-ESO Survey: membership and Initial Mass Function of the Gamma Velorum cluster
• The evolution of the Sun's birth cluster and the search for the solar siblings with Gaia
• Crucial aspects of the initial mass function (I): The statistical correlation between the total mass of an ensemble of stars and its most massive star
• Did the Solar System form in a sequential triggered star formation event?

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