A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories

We present a new self-consistent semianalytic model of the first stars and galaxies to explore the high-redshift ( z ≥ 15) Population III (PopIII) and metal-enriched star formation histories. Our model includes the detailed merger history of dark matter halos generated with Monte Carlo merger trees....
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Colton R. Feathers [verfasserIn] Mihir Kulkarni [verfasserIn] Eli Visbal [verfasserIn] Ryan Hazlett [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2024

Schlagwörter:	Cosmology Population III stars Galaxy formation

Übergeordnetes Werk:	In: The Astrophysical Journal - IOP Publishing, 2022, 962(2024), 1, p 62
Übergeordnetes Werk:	volume:962 ; year:2024 ; number:1, p 62

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/1538-4357/ad1688

Katalog-ID:	DOAJ094785414

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callnumber-first	Q - Science
author	Colton R. Feathers
spellingShingle	Colton R. Feathers misc QB460-466 misc Cosmology misc Population III stars misc Galaxy formation misc Astrophysics A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
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topic_title	QB460-466 A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories Cosmology Population III stars Galaxy formation
topic	misc QB460-466 misc Cosmology misc Population III stars misc Galaxy formation misc Astrophysics
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title	A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
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title_full	A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
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title_auth	A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
abstract	We present a new self-consistent semianalytic model of the first stars and galaxies to explore the high-redshift ( z ≥ 15) Population III (PopIII) and metal-enriched star formation histories. Our model includes the detailed merger history of dark matter halos generated with Monte Carlo merger trees. We calibrate the minimum halo mass for PopIII star formation from recent hydrodynamical cosmological simulations that simultaneously include the baryon–dark matter streaming velocity, Lyman–Werner (LW) feedback, and molecular hydrogen self-shielding. We find an overall increase in the resulting star formation rate density (SFRD) compared to calibrations based on previous simulations (e.g., the PopIII SFRD is over an order of magnitude higher at z = 35−15). We evaluate the effect of the halo-to-halo scatter in this critical mass and find that it increases the PopIII stellar mass density by a factor ∼1.5 at z ≥ 15. Additionally, we assess the impact of various semianalytic/analytic prescriptions for halo assembly and star formation previously adopted in the literature. For example, we find that models assuming smooth halo growth computed via abundance matching predict SFRDs similar to the merger tree model for our fiducial model parameters, but that they may underestimate the PopIII SFRD in cases of strong LW feedback. Finally, we simulate subvolumes of the Universe with our model both to quantify the reduction in total star formation in numerical simulations due to a lack of density fluctuations on spatial scales larger than the simulation box, and to determine spatial fluctuations in SFRD due to the diversity in halo abundances and merger histories.
abstractGer	We present a new self-consistent semianalytic model of the first stars and galaxies to explore the high-redshift ( z ≥ 15) Population III (PopIII) and metal-enriched star formation histories. Our model includes the detailed merger history of dark matter halos generated with Monte Carlo merger trees. We calibrate the minimum halo mass for PopIII star formation from recent hydrodynamical cosmological simulations that simultaneously include the baryon–dark matter streaming velocity, Lyman–Werner (LW) feedback, and molecular hydrogen self-shielding. We find an overall increase in the resulting star formation rate density (SFRD) compared to calibrations based on previous simulations (e.g., the PopIII SFRD is over an order of magnitude higher at z = 35−15). We evaluate the effect of the halo-to-halo scatter in this critical mass and find that it increases the PopIII stellar mass density by a factor ∼1.5 at z ≥ 15. Additionally, we assess the impact of various semianalytic/analytic prescriptions for halo assembly and star formation previously adopted in the literature. For example, we find that models assuming smooth halo growth computed via abundance matching predict SFRDs similar to the merger tree model for our fiducial model parameters, but that they may underestimate the PopIII SFRD in cases of strong LW feedback. Finally, we simulate subvolumes of the Universe with our model both to quantify the reduction in total star formation in numerical simulations due to a lack of density fluctuations on spatial scales larger than the simulation box, and to determine spatial fluctuations in SFRD due to the diversity in halo abundances and merger histories.
abstract_unstemmed	We present a new self-consistent semianalytic model of the first stars and galaxies to explore the high-redshift ( z ≥ 15) Population III (PopIII) and metal-enriched star formation histories. Our model includes the detailed merger history of dark matter halos generated with Monte Carlo merger trees. We calibrate the minimum halo mass for PopIII star formation from recent hydrodynamical cosmological simulations that simultaneously include the baryon–dark matter streaming velocity, Lyman–Werner (LW) feedback, and molecular hydrogen self-shielding. We find an overall increase in the resulting star formation rate density (SFRD) compared to calibrations based on previous simulations (e.g., the PopIII SFRD is over an order of magnitude higher at z = 35−15). We evaluate the effect of the halo-to-halo scatter in this critical mass and find that it increases the PopIII stellar mass density by a factor ∼1.5 at z ≥ 15. Additionally, we assess the impact of various semianalytic/analytic prescriptions for halo assembly and star formation previously adopted in the literature. For example, we find that models assuming smooth halo growth computed via abundance matching predict SFRDs similar to the merger tree model for our fiducial model parameters, but that they may underestimate the PopIII SFRD in cases of strong LW feedback. Finally, we simulate subvolumes of the Universe with our model both to quantify the reduction in total star formation in numerical simulations due to a lack of density fluctuations on spatial scales larger than the simulation box, and to determine spatial fluctuations in SFRD due to the diversity in halo abundances and merger histories.
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title_short	A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
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A Global Semianalytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories

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