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Cited by 342

The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.

THE SIZE-VIRIAL RADIUS RELATION OF GALAXIES

Open access
Kravtsov, Andrey V.·2013·The Astrophysical Journal
DOI 10.1088/2041-8205/764/2/l31
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Abstract

I use the abundance matching ansatz, which has proven to be successful in reproducing galaxy clustering and other statistics, to derive estimates of the virial radius, R 200 , for galaxies of different morphological types and a wide range of stellar masses. I show that over eight orders of magnitude in stellar mass galaxies of all morphological types follow an approximately linear relation between half-mass radius of their stellar distribution, r 1/2 , and virial radius, r 1/2 ≈ 0.015 R 200 , with scatter of ≈0.2 dex. Such scaling is in remarkable agreement with the expectation of models that assume that galaxy sizes are controlled by halo angular momentum, r 1/2 ∝λ R 200 , where λ is the spin of galaxy parent halo. The scatter about the relation is comparable with the scatter expected from the distribution of λ. Moreover, I show that when the stellar and gas surface density profiles of galaxies of different morphological types are rescaled by the radius r n = 0.015 R 200 , the rescaled profiles follow approximately universal exponential (for late types) and de Vaucouleurs (for early types) form with scatter of only ≈30%–50% at R ≈ 1–3 r n . Remarkably, both late- and early-type galaxies have similar mean stellar surface density profiles at R ≳ 1 r n . The main difference between their stellar distributions is thus at R < r n . The results of this study imply that galaxy sizes and radial distribution of baryons are shaped primarily by properties of their parent halos and that the sizes of both late-type disks and early-type spheroids are controlled by halo angular momentum.

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Metadata

Authors
Kravtsov, A. V.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2013-02-08
Volume
764
Issue
2
Pages
L31
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
DOI
10.1088/2041-8205/764/2/l31
OpenAlex
W2008953099
Cited by
342
References
37
FWCI
12.03
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: THE SIZE-VIRIAL RADIUS RELATION OF GALAXIES. https://app.cochat.ai/papers/10.1088/2041-8205/764/2/l31
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Kravtsov, A. V. (2013). THE SIZE-VIRIAL RADIUS RELATION OF GALAXIES. The Astrophysical Journal. https://doi.org/10.1088/2041-8205/764/2/l31

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