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Cited by 835Galaxies: Formation, Evolution, PhenomenaStellar, planetary, and galactic studiesAstrophysical Phenomena and Observations

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SPARC: MASS MODELS FOR 175 DISK GALAXIES WITH SPITZER PHOTOMETRY AND ACCURATE ROTATION CURVES

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Lelli, Federico, McGaugh, Stacy S., Schombert, James M.·2016·The Astronomical Journal
DOI 10.3847/0004-6256/152/6/157
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Abstract

We introduce SPARC ( Spitzer Photometry and Accurate Rotation Curves): a sample of 175 nearby galaxies with new surface photometry at 3.6 μ m and high-quality rotation curves from previous H i /H α studies. SPARC spans a broad range of morphologies (S0 to Irr), luminosities (∼5 dex), and surface brightnesses (∼4 dex). We derive [3.6] surface photometry and study structural relations of stellar and gas disks. We find that both the stellar mass–H i mass relation and the stellar radius–H i radius relation have significant intrinsic scatter, while the H i mass–radius relation is extremely tight. We build detailed mass models and quantify the ratio of baryonic to observed velocity ( V bar / V obs ) for different characteristic radii and values of the stellar mass-to-light ratio (ϒ ⋆ ) at [3.6]. Assuming ϒ ⋆ ≃ 0.5 M ⊙ / L ⊙ (as suggested by stellar population models), we find that (i) the gas fraction linearly correlates with total luminosity; (ii) the transition from star-dominated to gas-dominated galaxies roughly corresponds to the transition from spiral galaxies to dwarf irregulars, in line with density wave theory; and (iii) V bar / V obs varies with luminosity and surface brightness: high-mass, high-surface-brightness galaxies are nearly maximal, while low-mass, low-surface-brightness galaxies are submaximal. These basic properties are lost for low values of ϒ ⋆ ≃ 0.2 M ⊙ / L ⊙ as suggested by the DiskMass survey. The mean maximum-disk limit in bright galaxies is ϒ ⋆ ≃ 0.7 M ⊙ / L ⊙ at [3.6]. The SPARC data are publicly available and represent an ideal test bed for models of galaxy formation.

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Research works printed but not linked: 3

  1. Broeils, 1997, A&A, 324, 877
  2. Roelfsema, 1985, A&A, 146, 213
  3. Verdes-Montenegro, 1997, A&A, 321, 754

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Metadata

Authors
Lelli, F., McGaugh, S. S., & Schombert, J. M.
Affiliations
  • Case Western Reserve University (US)
  • University of Oregon (US)
Corresponding author
Lelli, Federico
ORCID
Venue
The Astronomical Journal
Publisher
American Astronomical Society
Published
2016-11-11
Volume
152
Issue
6
Pages
157
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
DOI
10.3847/0004-6256/152/6/157
OpenAlex
W2464805820
Cited by
835
References
107
Citations by year
2026: 139 · 2025: 93 · 2024: 86 · 2023: 75 · 2022: 78 · 2021: 89 · 2020: 92 · 2019: 72 · 2018: 67 · 2017: 37 · 2016: 7
FWCI
29.17
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astronomical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Scholarly Commons @ Case Western Reserve University (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
Keywords
SPARC, disk galaxies, rotation curves, mass models, surface photometry, stellar mass-to-light ratio, void fraction, baryonic mass, density wave theory, galaxy formation, spiral galaxies, dwarf irregular galaxies

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