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Title: First Star-Forming Structures in Fuzzy Cosmic Filaments

Abstract

In hierarchical models of structure formation, the first galaxies form in low-mass dark matter potential wells, probing the behavior of dark matter on kiloparsec scales. Even though these objects are below the detection threshold of current telescopes, future missions will open an observational window into this emergent world. In this Letter, we investigate how the first galaxies are assembled in a “fuzzy” dark matter (FDM) cosmology where dark matter is an ultralight ~10 –22 eV boson and the primordial stars are expected to form along dense dark matter filaments. Furthermore, using a first-of-its-kind cosmological hydrodynamical simulation, we explore the interplay between baryonic physics and unique wavelike features inherent to FDM. In our simulation, the dark matter filaments show coherent interference patterns on the boson de Broglie scale and develop cylindrical solitonlike cores, which are unstable under gravity and collapse into kiloparsec-scale spherical solitons. Features of the dark matter distribution are largely unaffected by the baryonic feedback. On the contrary, the distributions of gas and stars, which do form along the entire filament, exhibit central cores imprinted by dark matter—a smoking gun signature of FDM.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [4];  [6];  [7];  [4];  [1];  [8];  [9];  [10]
  1. Princeton Univ., NJ (United States)
  2. Univ. of Sussex, Brighton (United Kingdom)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  5. Rice Univ., Houston, TX (United States)
  6. Univ. of Texas, Austin, TX (United States)
  7. Univ. Paul Sabatier, Toulouse (France)
  8. Univ. of Bologna (Italy)
  9. Univ. of California, Irvine, CA (United States)
  10. Univ. of Iceland, Reykjavik (Iceland)
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1594814
Alternate Identifier(s):
OSTI ID: 1568945
Grant/Contract Number:  
SC0018216; TG-AST170020; PF7-180164; NAS8-03060; YITP-T-19-02; AST-1517226; AST-1752913; NNX17AG29G; HST-AR-14282; HST-AR-14554; HST-AR-15006; HST-GO-14191; NAS5-2655; 173929-051
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Dark matter; Evolution of the Universe; Formation & evolution of stars & galaxies

Citation Formats

Mocz, Philip, Fialkov, Anastasia, Vogelsberger, Mark, Becerra, Fernando, Amin, Mustafa A., Bose, Sownak, Boylan-Kolchin, Michael, Chavanis, Pierre-Henri, Hernquist, Lars, Lancaster, Lachlan, Marinacci, Federico, Robles, Victor H., and Zavala, Jesús. First Star-Forming Structures in Fuzzy Cosmic Filaments. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.141301.
Mocz, Philip, Fialkov, Anastasia, Vogelsberger, Mark, Becerra, Fernando, Amin, Mustafa A., Bose, Sownak, Boylan-Kolchin, Michael, Chavanis, Pierre-Henri, Hernquist, Lars, Lancaster, Lachlan, Marinacci, Federico, Robles, Victor H., & Zavala, Jesús. First Star-Forming Structures in Fuzzy Cosmic Filaments. United States. doi:10.1103/PhysRevLett.123.141301.
Mocz, Philip, Fialkov, Anastasia, Vogelsberger, Mark, Becerra, Fernando, Amin, Mustafa A., Bose, Sownak, Boylan-Kolchin, Michael, Chavanis, Pierre-Henri, Hernquist, Lars, Lancaster, Lachlan, Marinacci, Federico, Robles, Victor H., and Zavala, Jesús. Wed . "First Star-Forming Structures in Fuzzy Cosmic Filaments". United States. doi:10.1103/PhysRevLett.123.141301.
@article{osti_1594814,
title = {First Star-Forming Structures in Fuzzy Cosmic Filaments},
author = {Mocz, Philip and Fialkov, Anastasia and Vogelsberger, Mark and Becerra, Fernando and Amin, Mustafa A. and Bose, Sownak and Boylan-Kolchin, Michael and Chavanis, Pierre-Henri and Hernquist, Lars and Lancaster, Lachlan and Marinacci, Federico and Robles, Victor H. and Zavala, Jesús},
abstractNote = {In hierarchical models of structure formation, the first galaxies form in low-mass dark matter potential wells, probing the behavior of dark matter on kiloparsec scales. Even though these objects are below the detection threshold of current telescopes, future missions will open an observational window into this emergent world. In this Letter, we investigate how the first galaxies are assembled in a “fuzzy” dark matter (FDM) cosmology where dark matter is an ultralight ~10–22 eV boson and the primordial stars are expected to form along dense dark matter filaments. Furthermore, using a first-of-its-kind cosmological hydrodynamical simulation, we explore the interplay between baryonic physics and unique wavelike features inherent to FDM. In our simulation, the dark matter filaments show coherent interference patterns on the boson de Broglie scale and develop cylindrical solitonlike cores, which are unstable under gravity and collapse into kiloparsec-scale spherical solitons. Features of the dark matter distribution are largely unaffected by the baryonic feedback. On the contrary, the distributions of gas and stars, which do form along the entire filament, exhibit central cores imprinted by dark matter—a smoking gun signature of FDM.},
doi = {10.1103/PhysRevLett.123.141301},
journal = {Physical Review Letters},
number = 14,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}

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