Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3

Kuang Han Huang, S. Michael Fall, Henry C. Ferguson, Arjen Van Der Wel, Norman Grogin, Anton Koekemoer, Seong-Kook Lee, Pablo G. Pérez-González, Stijn Wuyts

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Abstract

We derive relations between the effective radii R eff of galaxies and the virial radii R 200c of their dark matter halos over the redshift range 0 <z <3. For galaxies, we use the measured sizes from deep images taken with Hubble Space Telescope for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey; for halos, we use the inferred sizes from abundance matching to cosmological dark matter simulations via a stellar mass-halo mass (SMHM) relation. For this purpose, we derive a new SMHM relation based on the same selection criteria and other assumptions as for our sample of galaxies with size measurements. As a check on the robustness of our results, we also derive R eff-R 200c relations for three independent SMHM relations from the literature. We find that galaxy R eff is proportional on average to halo R 200c, confirming and extending to high redshifts the z = 0 results of Kravtsov. Late-type galaxies (with low Sérsic index and high specific star formation rate (sSFR)) follow a linear R eff-R 200c relation, with effective radii at 0.5 <z <3 close to those predicted by simple models of disk formation; at z <0.5, the sizes of late-type galaxies appear to be slightly below this prediction. Early-type galaxies (with high Sérsic index and low sSFR) follow a roughly parallel R eff-R 200c relation, ∼0.2-0.3 dex below the one for late-type galaxies. Our observational results, reinforced by recent hydrodynamical simulations, indicate that galaxies grow quasi-homologously with their dark matter halos.

Original languageEnglish
Article number6
JournalAstrophysical Journal
Volume838
Issue number1
DOIs
Publication statusPublished - 17 Mar 2017

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halos
dark matter
galaxies
stellar mass
star formation rate
radii
simulation
near infrared
Hubble Space Telescope
assembly
prediction
predictions
index
rate

Keywords

  • galaxies: evolution
  • galaxies: high-redshift
  • galaxies: structure
  • methods: data analysis

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Huang, K. H., Fall, S. M., Ferguson, H. C., Van Der Wel, A., Grogin, N., Koekemoer, A., ... Wuyts, S. (2017). Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3. Astrophysical Journal, 838(1), [6]. https://doi.org/10.3847/1538-4357/aa62a6

Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3. / Huang, Kuang Han; Fall, S. Michael; Ferguson, Henry C.; Van Der Wel, Arjen; Grogin, Norman; Koekemoer, Anton; Lee, Seong-Kook; Pérez-González, Pablo G.; Wuyts, Stijn.

In: Astrophysical Journal, Vol. 838, No. 1, 6, 17.03.2017.

Research output: Contribution to journalArticle

Huang, KH, Fall, SM, Ferguson, HC, Van Der Wel, A, Grogin, N, Koekemoer, A, Lee, S-K, Pérez-González, PG & Wuyts, S 2017, 'Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3', Astrophysical Journal, vol. 838, no. 1, 6. https://doi.org/10.3847/1538-4357/aa62a6
Huang KH, Fall SM, Ferguson HC, Van Der Wel A, Grogin N, Koekemoer A et al. Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3. Astrophysical Journal. 2017 Mar 17;838(1). 6. https://doi.org/10.3847/1538-4357/aa62a6
Huang, Kuang Han ; Fall, S. Michael ; Ferguson, Henry C. ; Van Der Wel, Arjen ; Grogin, Norman ; Koekemoer, Anton ; Lee, Seong-Kook ; Pérez-González, Pablo G. ; Wuyts, Stijn. / Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 <z <3. In: Astrophysical Journal. 2017 ; Vol. 838, No. 1.
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