The Evolution of Star Formation Rate Density of Galaxies

Joachim Wirsich

doi:doi:10.11648/j.ajmp.20211001.11

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The Evolution of Star Formation Rate Density of Galaxies

Joachim Wirsich

Published in American Journal of Modern Physics (Volume 10, Issue 1)

Received: 30 October 2020 Accepted: 5 January 2021 Published: 20 February 2021

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Abstract

We present a semi-analytical calculation of the global star formation density (SFD) by using the well constrained cold dark matter (CDM) halo mass function. Both, halo masses M_H(z) and stellar masses M_*(z) are taken from observations of Lyα emitter (LAEs) and/or Lyman break galaxies (LBGs). Most of them, spectroscopically selected, are characterized by high star formation rates. The view of galaxy formation is mainly based on the hierarchical (“botton-up”) cold dark matter model for structure formation. We have used the connection between the halo mass and the star formation rate in galaxies of the halo mass M_H at redshift z. Our model has the advantage that we are able to calculate the global star formation rate ρ_*(z) (in Mʘy-1Mpc-3) by a closed equation. All parameters (M_H; M_* and n) have a well-defined physical meaning. From the CDM spectrum, the power law index of the halo mass function is well constrained. Our results are compiled in Table 1 and Figure 1. Here our results are compared with observations and hydrodynamical simulations. The physical meaning of the evolution of comoving cosmic star density as a function of redshift with three epochs is discussed. We find a good agreement between the SFD inferred from observations and our model in the range of redshifts z = 0 - 7.

Published in	American Journal of Modern Physics (Volume 10, Issue 1)
DOI	10.11648/j.ajmp.20211001.11
Page(s)	1-6
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Galaxies: Evolution, Galaxies: High Redshift, Galaxies: Star Formation

References

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Joachim Wirsich. (2021). The Evolution of Star Formation Rate Density of Galaxies. American Journal of Modern Physics, 10(1), 1-6. https://doi.org/10.11648/j.ajmp.20211001.11

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Joachim Wirsich. The Evolution of Star Formation Rate Density of Galaxies. Am. J. Mod. Phys. 2021, 10(1), 1-6. doi: 10.11648/j.ajmp.20211001.11

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Joachim Wirsich. The Evolution of Star Formation Rate Density of Galaxies. Am J Mod Phys. 2021;10(1):1-6. doi: 10.11648/j.ajmp.20211001.11

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@article{10.11648/j.ajmp.20211001.11,
  author = {Joachim Wirsich},
  title = {The Evolution of Star Formation Rate Density of Galaxies},
  journal = {American Journal of Modern Physics},
  volume = {10},
  number = {1},
  pages = {1-6},
  doi = {10.11648/j.ajmp.20211001.11},
  url = {https://doi.org/10.11648/j.ajmp.20211001.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmp.20211001.11},
  abstract = {We present a semi-analytical calculation of the global star formation density (SFD) by using the well constrained cold dark matter (CDM) halo mass function. Both, halo masses MH(z) and stellar masses M*(z) are taken from observations of Lyα emitter (LAEs) and/or Lyman break galaxies (LBGs). Most of them, spectroscopically selected, are characterized by high star formation rates. The view of galaxy formation is mainly based on the hierarchical (“botton-up”) cold dark matter model for structure formation. We have used the connection between the halo mass and the star formation rate in galaxies of the halo mass MH at redshift z. Our model has the advantage that we are able to calculate the global star formation rate ρ*(z) (in Mʘy-1Mpc-3) by a closed equation. All parameters (MH; M* and n) have a well-defined physical meaning. From the CDM spectrum, the power law index of the halo mass function is well constrained. Our results are compiled in Table 1 and Figure 1. Here our results are compared with observations and hydrodynamical simulations. The physical meaning of the evolution of comoving cosmic star density as a function of redshift with three epochs is discussed. We find a good agreement between the SFD inferred from observations and our model in the range of redshifts z = 0 - 7.},
 year = {2021}
}

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TY  - JOUR
T1  - The Evolution of Star Formation Rate Density of Galaxies
AU  - Joachim Wirsich
Y1  - 2021/02/20
PY  - 2021
N1  - https://doi.org/10.11648/j.ajmp.20211001.11
DO  - 10.11648/j.ajmp.20211001.11
T2  - American Journal of Modern Physics
JF  - American Journal of Modern Physics
JO  - American Journal of Modern Physics
SP  - 1
EP  - 6
PB  - Science Publishing Group
SN  - 2326-8891
UR  - https://doi.org/10.11648/j.ajmp.20211001.11
AB  - We present a semi-analytical calculation of the global star formation density (SFD) by using the well constrained cold dark matter (CDM) halo mass function. Both, halo masses MH(z) and stellar masses M*(z) are taken from observations of Lyα emitter (LAEs) and/or Lyman break galaxies (LBGs). Most of them, spectroscopically selected, are characterized by high star formation rates. The view of galaxy formation is mainly based on the hierarchical (“botton-up”) cold dark matter model for structure formation. We have used the connection between the halo mass and the star formation rate in galaxies of the halo mass MH at redshift z. Our model has the advantage that we are able to calculate the global star formation rate ρ*(z) (in Mʘy-1Mpc-3) by a closed equation. All parameters (MH; M* and n) have a well-defined physical meaning. From the CDM spectrum, the power law index of the halo mass function is well constrained. Our results are compiled in Table 1 and Figure 1. Here our results are compared with observations and hydrodynamical simulations. The physical meaning of the evolution of comoving cosmic star density as a function of redshift with three epochs is discussed. We find a good agreement between the SFD inferred from observations and our model in the range of redshifts z = 0 - 7.
VL  - 10
IS  - 1
ER  -

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Author Information

Joachim Wirsich

Independent Researcher, Berlin, Germany

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Joachim Wirsich. (2021). The Evolution of Star Formation Rate Density of Galaxies. American Journal of Modern Physics, 10(1), 1-6. https://doi.org/10.11648/j.ajmp.20211001.11

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Joachim Wirsich. The Evolution of Star Formation Rate Density of Galaxies. Am. J. Mod. Phys. 2021, 10(1), 1-6. doi: 10.11648/j.ajmp.20211001.11

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AMA Style

Joachim Wirsich. The Evolution of Star Formation Rate Density of Galaxies. Am J Mod Phys. 2021;10(1):1-6. doi: 10.11648/j.ajmp.20211001.11

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@article{10.11648/j.ajmp.20211001.11,
  author = {Joachim Wirsich},
  title = {The Evolution of Star Formation Rate Density of Galaxies},
  journal = {American Journal of Modern Physics},
  volume = {10},
  number = {1},
  pages = {1-6},
  doi = {10.11648/j.ajmp.20211001.11},
  url = {https://doi.org/10.11648/j.ajmp.20211001.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmp.20211001.11},
  abstract = {We present a semi-analytical calculation of the global star formation density (SFD) by using the well constrained cold dark matter (CDM) halo mass function. Both, halo masses MH(z) and stellar masses M*(z) are taken from observations of Lyα emitter (LAEs) and/or Lyman break galaxies (LBGs). Most of them, spectroscopically selected, are characterized by high star formation rates. The view of galaxy formation is mainly based on the hierarchical (“botton-up”) cold dark matter model for structure formation. We have used the connection between the halo mass and the star formation rate in galaxies of the halo mass MH at redshift z. Our model has the advantage that we are able to calculate the global star formation rate ρ*(z) (in Mʘy-1Mpc-3) by a closed equation. All parameters (MH; M* and n) have a well-defined physical meaning. From the CDM spectrum, the power law index of the halo mass function is well constrained. Our results are compiled in Table 1 and Figure 1. Here our results are compared with observations and hydrodynamical simulations. The physical meaning of the evolution of comoving cosmic star density as a function of redshift with three epochs is discussed. We find a good agreement between the SFD inferred from observations and our model in the range of redshifts z = 0 - 7.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - The Evolution of Star Formation Rate Density of Galaxies
AU  - Joachim Wirsich
Y1  - 2021/02/20
PY  - 2021
N1  - https://doi.org/10.11648/j.ajmp.20211001.11
DO  - 10.11648/j.ajmp.20211001.11
T2  - American Journal of Modern Physics
JF  - American Journal of Modern Physics
JO  - American Journal of Modern Physics
SP  - 1
EP  - 6
PB  - Science Publishing Group
SN  - 2326-8891
UR  - https://doi.org/10.11648/j.ajmp.20211001.11
AB  - We present a semi-analytical calculation of the global star formation density (SFD) by using the well constrained cold dark matter (CDM) halo mass function. Both, halo masses MH(z) and stellar masses M*(z) are taken from observations of Lyα emitter (LAEs) and/or Lyman break galaxies (LBGs). Most of them, spectroscopically selected, are characterized by high star formation rates. The view of galaxy formation is mainly based on the hierarchical (“botton-up”) cold dark matter model for structure formation. We have used the connection between the halo mass and the star formation rate in galaxies of the halo mass MH at redshift z. Our model has the advantage that we are able to calculate the global star formation rate ρ*(z) (in Mʘy-1Mpc-3) by a closed equation. All parameters (MH; M* and n) have a well-defined physical meaning. From the CDM spectrum, the power law index of the halo mass function is well constrained. Our results are compiled in Table 1 and Figure 1. Here our results are compared with observations and hydrodynamical simulations. The physical meaning of the evolution of comoving cosmic star density as a function of redshift with three epochs is discussed. We find a good agreement between the SFD inferred from observations and our model in the range of redshifts z = 0 - 7.
VL  - 10
IS  - 1
ER  -

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