True Pair-instability Supernova Descendant: Implications for the First Stars' Mass Distribution

Abstract

The initial mass function (IMF) of the first Pop III stars remains a persistent mystery. Their predicted massive nature implies the existence of stars exploding as pair-instability supernovae (PISN), but no observational evidence had been found. Now, the LAMOST survey claims to have discovered a pure PISN descendant, J1010+2358, at $[Fe/H]=-2.4$. Here we confirm that a massive 250-260 ${\mathrm{M}}_{\odot }$ PISN is needed to reproduce the abundance pattern of J1010+2358. However, the PISN contribution can be as low as 10%, since key elements are missing to discriminate between scenarios. We investigate the implications of this discovery for the Pop III IMF, by statistical comparison with the predictions of our cosmological galaxy formation model, NEFERTITI. First, we show that the non-detection of mono-enriched PISN descendants at $[Fe/H]<-2.5$ allows us to exclude: (i) a flat IMF at a 90% confidence level; and (ii) a Larson type IMF with characteristic mass $m_{\mathrm{ch}}/{\mathrm{M}}_{\odot }>191.16x-132.44$, where x is the slope, at a 75% confidence level. Secondly, we show that if J1010+2358 has only inherited <70% of its metals from a massive PISN, no further constraints can be put on the Pop III IMF. If, instead, J1010+2358 will be confirmed to be a nearly pure (>90%) PISN descendant, it will offer strong and complementary constraints on the Pop III IMF, excluding the steepest and bottom-heaviest IMFs: $m_{\mathrm{ch}}/{\mathrm{M}}_{\odot }<143.21x-225.94$. Our work shows that even a single detection of a pure PISN descendant can be crucial to our understanding of the mass distribution of the first stars.

arXiv comment7 pages; expanded title abbreviation, added minor clarifications in text

References in corpus (32)

• The Nucleosynthetic Signature of Population III
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• Presupernova evolution and explosive nucleosynthesis of rotating massive stars in the metallicity range -3 <=[Fe/H]<= 0
• Early Star Formation and the Evolution of the Stellar Initial Mass Function in Galaxies
• The Stellar Abundances for Galactic Archeology (SAGA) Database - Compilation of the Characteristics of Known Extremely Metal-Poor Stars
• Primordial Star Formation under the Influence of Far Ultraviolet Radiation: 1540 Cosmological Halos and the Stellar Mass Distribution
• The Mass Spectrum of the First Stars
• The Formation of the First Stars II. Radiative Feedback Processes and Implications for the Initial Mass Function
• Ultra faint dwarfs: probing early cosmic star formation
• The Initial mass function of the first stars inferred from extremely metal-poor stars
• Stellar Yields of Rotating First Stars. II. Pair Instability Supernovae and Comparison with Observations
• Uncovering the Chemical Signature of the First Stars in the Universe
• Descendants of the first stars: the distinct chemical signature of second generation stars
• Four-hundred Very Metal-Poor Stars Studied with LAMOST and Subaru. II. Elemental abundances
• Limits on Pop III star formation with the most iron-poor stars
• Carbon-enhanced metal-poor stars in dwarf galaxies
• Formation and survival of Population III stellar systems
• Stellar Abundances for Galactic Archaeology Database IV - Compilation of Stars in Dwarf Galaxies
• The Brightest Ly$\alpha$ Emitter: Pop III or Black Hole?
• Probing the existence of very massive first stars
• Contribution of Neutron Star Mergers to the R-process Chemical Evolution in the Hierarchical Galaxy Formation
• Ultra-faint dwarf galaxies: unveiling the minimum mass of the first stars
• First stars in Damped Lyman Alpha systems
• Implications of inhomogeneous metal mixing for stellar archaeology
• Metal Mixing in Minihalos: The Descendants of Pair-Instability Supernovae
• Four-hundred Very Metal-poor Stars studied with LAMOST and Subaru. I. Survey Design, Follow-up Program, and Binary Frequency
• The energy distribution of the first supernovae
• Probing Population III Initial Mass Functions with He II/H$\alpha$ Intensity Mapping
• PISN-explorer: hunting the descendants of very massive first stars
• Tracing stars in Milky Way satellites with A-SLOTH
• On the dearth of C-enhanced metal-poor stars in the Galactic bulge

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