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Title: Alignment between Filaments and Galaxy Spins from the MaNGA Integral-field Survey

Abstract

Halos and galaxies acquire their angular momentum during the collapse of the surrounding large-scale structure. This process imprints alignments between galaxy spins and nearby filaments and sheets. Low-mass halos grow by accretion onto filaments, aligning their spins with the filaments, whereas high-mass halos grow by mergers along filaments, generating spins perpendicular to the filament. Here, we search for this alignment signal using filaments identified with the "Cosmic Web Reconstruction" algorithm applied to the Sloan Digital Sky Survey Main Galaxy Sample and galaxy spins from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) integral-field unit survey. MaNGA produces a map of the galaxy's rotational velocity, allowing direct measurement of the galaxy's spin direction, or unit angular momentum vector projected onto the sky. We find no evidence for alignment between galaxy spins and filament directions. We do find hints of a mass-dependent alignment signal, which is in 2σ–3σ tension with the mass-dependent alignment signal in the MassiveBlack-II and Illustris hydrodynamical simulations. However, the tension vanishes when galaxy spin is measured using the Hα emission line velocity rather than stellar velocity. Lastly, in simulations we find that the mass-dependent transition from aligned to anti-aligned dark matter halo spins is not necessarily presentmore » in stellar spins: we find a stellar spin transition in Illustris but not in MassiveBlack-II, highlighting the sensitivity of spin-filament alignments to feedback prescriptions and subgrid physics.« less

Authors:
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [6];  [7]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Astronomy; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Physics; Carnegie Mellon Univ., Pittsburgh, PA (United States). McWilliams Center for Cosmology; Univ. of California, Berkeley, CA (United States). Berkeley Center for Cosmological Physics
  3. Univ. of Washington, Seattle, WA (United States). Dept. of Statistics
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); The Chinese Univ. of Hong Kong (China)
  5. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Physics
  6. Apache Point Observatory and New Mexico State Univ., Sunspot, NM (United States); Moscow State Univ., Moscow (Russian Federation). Sternberg Astronomical Inst.
  7. Univ. of Edinburgh, Scotland (United Kingdom). The Royal Observatory, Inst. for Astronomy
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1528630
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 876; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmology: observations; galaxies: evolution; galaxies: formation; large-scale structure of universe

Citation Formats

Krolewski, Alex, Ho, Shirley, Chen, Yen-Chi, Chan, P. F., Tenneti, Ananth, Bizyaev, Dmitry, and Kraljic, Katarina. Alignment between Filaments and Galaxy Spins from the MaNGA Integral-field Survey. United States: N. p., 2019. Web. doi:10.3847/1538-4357/ab1010.
Krolewski, Alex, Ho, Shirley, Chen, Yen-Chi, Chan, P. F., Tenneti, Ananth, Bizyaev, Dmitry, & Kraljic, Katarina. Alignment between Filaments and Galaxy Spins from the MaNGA Integral-field Survey. United States. doi:10.3847/1538-4357/ab1010.
Krolewski, Alex, Ho, Shirley, Chen, Yen-Chi, Chan, P. F., Tenneti, Ananth, Bizyaev, Dmitry, and Kraljic, Katarina. Wed . "Alignment between Filaments and Galaxy Spins from the MaNGA Integral-field Survey". United States. doi:10.3847/1538-4357/ab1010. https://www.osti.gov/servlets/purl/1528630.
@article{osti_1528630,
title = {Alignment between Filaments and Galaxy Spins from the MaNGA Integral-field Survey},
author = {Krolewski, Alex and Ho, Shirley and Chen, Yen-Chi and Chan, P. F. and Tenneti, Ananth and Bizyaev, Dmitry and Kraljic, Katarina},
abstractNote = {Halos and galaxies acquire their angular momentum during the collapse of the surrounding large-scale structure. This process imprints alignments between galaxy spins and nearby filaments and sheets. Low-mass halos grow by accretion onto filaments, aligning their spins with the filaments, whereas high-mass halos grow by mergers along filaments, generating spins perpendicular to the filament. Here, we search for this alignment signal using filaments identified with the "Cosmic Web Reconstruction" algorithm applied to the Sloan Digital Sky Survey Main Galaxy Sample and galaxy spins from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) integral-field unit survey. MaNGA produces a map of the galaxy's rotational velocity, allowing direct measurement of the galaxy's spin direction, or unit angular momentum vector projected onto the sky. We find no evidence for alignment between galaxy spins and filament directions. We do find hints of a mass-dependent alignment signal, which is in 2σ–3σ tension with the mass-dependent alignment signal in the MassiveBlack-II and Illustris hydrodynamical simulations. However, the tension vanishes when galaxy spin is measured using the Hα emission line velocity rather than stellar velocity. Lastly, in simulations we find that the mass-dependent transition from aligned to anti-aligned dark matter halo spins is not necessarily present in stellar spins: we find a stellar spin transition in Illustris but not in MassiveBlack-II, highlighting the sensitivity of spin-filament alignments to feedback prescriptions and subgrid physics.},
doi = {10.3847/1538-4357/ab1010},
journal = {The Astrophysical Journal (Online)},
issn = {1538-4357},
number = 1,
volume = 876,
place = {United States},
year = {2019},
month = {5}
}

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