The origin of the most iron-poor star

Abstract

We investigate the origin of carbon-enhanced metal-poor (CEMP) stars starting from the recently discovered $[Fe/H]<-7.1$ star SMSS J031300 (Keller et al. 2014). We show that the elemental abundances observed on the surface of SMSS J031300 can be well fit by the yields of faint, metal free, supernovae. Using properly calibrated faint supernova explosion models, we study, for the first time, the formation of dust grains in such carbon-rich, iron-poor supernova ejecta. Calculations are performed assuming both unmixed and uniformly mixed ejecta and taking into account the partial destruction by the supernova reverse shock. We find that, due to the paucity of refractory elements beside carbon, amorphous carbon is the only grain species to form, with carbon condensation efficiencies that range between (0.15-0.84), resulting in dust yields in the range (0.025-2.25)M${}_{\odot }$. We follow the collapse and fragmentation of a star forming cloud enriched by the products of these faint supernova explosions and we explore the role played by fine structure line cooling and dust cooling. We show that even if grain growth during the collapse has a minor effect of the dust-to-gas ratio, due to C depletion into CO molecules at an early stage of the collapse, the formation of CEMP low-mass stars, such as SMSS J031300, could be triggered by dust cooling and fragmentation. A comparison between model predictions and observations of a sample of C-normal and C-rich metal-poor stars supports the idea that a single common pathway may be responsible for the formation of the first low-mass stars.

arXiv comment14 pages, 8 figures, accepted for publication in ApJ. Rephrased sentence in section 5 to avoid text overlap with arXiv:1307.2239 in their model description

References in corpus (53)

• The chemical composition of the Sun
• First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• One Hundred First Stars : Protostellar Evolution and the Final Masses
• Dust Formation in Primordial Type II Supernovae
• Nucleosynthesis of Zinc and Iron-Peak Elements in Pop III Type II Supernovae : Comparison with abundances of Very Metal-Poor Halo Stars
• Thermal and Fragmentation Properties of Star-forming Clouds in Low-metallicity Environments
• The nucleosynthesis of Al26 and Fe60 in solar metallicity stars extending in mass from 11 to 120 Msun: the hydrostatic and explosive contributions
• The Formation of the First Low-Mass Stars From Gas With Low Carbon and Oxygen Abundances
• Dust in the Early Universe: Dust Formation in the Ejecta of Population III Supernovae
• First-generation black-hole-forming supernovae and the metal abundance pattern of a very iron-poor star
• The early star generations: the dominant effect of rotation on the CNO yields
• Dust Formation and Survival in Supernova Ejecta
• A single low-energy, iron-poor supernova as the source of metals in the star SMSS J 031300.36-670839.3
• The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5
• An extremely primitive halo star
• Early Metal Enrichment of the Intergalactic Medium by Pregalactic Outflows
• The Binary Frequency Among Carbon-Enhanced, s-Process Rich, Metal-Poor Stars
• Protostellar Collapse with Various Metallicities
• Supernova Nucleosynthesis in Population III 13 -- 50 $M_{\odot }$ Stars and Abundance Patterns of Extremely Metal-Poor Stars
• Evolution of Dust in Primordial Supernova Remnants: Can Dust Grains Formed in the Ejecta Survive and be Injected into the Early Interstellar Medium?
• Evolution, Explosion and Nucleosynthesis of Core Collapse Supernovae
• Very low metallicity massive star models: Pre-SN evolution and primary nitrogen production
• Low-Mass Relics of Early Star Formation
• HE 0557-4840 - Ultra-Metal-Poor and Carbon-Rich
• A holistic approach to carbon-enhanced metal-poor stars
• Probing the Formation of the First Low-Mass Stars with Stellar Archaeology
• The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0
• Is HE0107-5240 A Primordial Star? -- The Characteristics of Extremely Metal-Poor Carbon-Rich Stars --
• Dust Formation in Very Massive Primordial Supernovae
• The chemistry of population III supernova ejecta: II - The nucleation of molecular clusters as a diagnostic for dust in the early universe
• Numerical Simulations of Supernova Dust Destruction. I. Cloud-crushing and Post-processed Grain Sputtering
• Are C-rich ultra iron poor stars also He-rich?
• The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction
• The first low-mass stars: critical metallicity or dust-to-gas ratio?
• Formation and Evolution of Dust in Type IIb Supernova with Application to the Cassiopeia A Supernova Remnant
• Presupernova evolution and explosive nucleosynthesis of zero metal massive stars
• The dust production rate of AGB stars in the Magellanic Clouds
• Mixing in Zero and Solar Metallicity Supernovae
• The Chemistry of Population III Supernova Ejecta: I - Formation of Molecules in the Early Universe
• The chemically controlled synthesis of dust in type II-P supernovae
• Metals, dust and the cosmic microwave background: fragmentation of high-redshift star-forming clouds
• Evolution and nucleosynthesis of extremely metal-poor and metal-free low- and intermediate-mass stars II. s-process nucleosynthesis during the core He flash
• Metal-Poor Stars and the Chemical Enrichment of the Universe
• The formation of the extremely primitive star SDSS J102915+172927 relies on dust
• Extreme Enhancements of r-process Elements in the Cool Metal-Poor Main-Sequence Star SDSS J2357-0052
• Numerical Simulations of Supernova Dust Destruction. II. Metal-Enriched Ejecta Knots
• Gravitational instability in protostellar disks at low metallicities
• The Chemical Imprint of Silicate Dust on the Most Metal-Poor Stars
• Formulation of Non-steady-state Dust Formation Process in Astrophysical Environments
• Dust grain growth and the formation of the extremely primitive star SDSS J102915+172927
• Growth of dust grains in a low-metallicity gas and its effect on the cloud fragmentation
• Can the Growth of Dust Grains in Low-Metallicity Star-Forming Clouds Affect the Formation of Metal-Poor Low-Mass Stars?

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• The First Population II Stars Formed in Externally Enriched Mini-halos
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• Pop III $\text{i}$-process Nucleosynthesis and the Elemental Abundances of SMSS J0313-6708 and the Most Iron-Poor Stars
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• Classification of extremely metal-poor stars: absent region in A(C)-[Fe/H] plane and the role of dust cooling
• AGB and SAGB stars: modelling dust production at solar metallicity
• Supernova dust formation and the grain growth in the early universe: The critical metallicity for low-mass star formation
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• Seeding the second star -- II. CEMP star formation enriched from faint supernovae
• Toward $abinitio$ extremely metal poor stars
• CEMP stars: possible hosts to carbon planets in the early universe
• Population III stars around the Milky Way
• Probing the High-Redshift Universe with SPICA: Toward the Epoch of Reionization and Beyond
• Can Population III stars be major origins of both merging binary black holes and extremely metal poor stars?
• On the dearth of C-enhanced metal-poor stars in the Galactic bulge
• Are the Formation and Abundances of Metal-Poor Stars the Result of Dust Dynamics?
• Carbon envelopes around merging galaxies at z ~ 4.5
• Chemical evolution of galaxies: emerging dust and the different gas phases in a new multiphase code
• Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
• The Dawn of Black Holes