THE EVOLUTION OF THE MASS-SIZE RELATION TO z = 3.5 FOR UV-BRIGHT GALAXIES AND SUBMILLIMETER GALAXIES IN THE GOODS-NORTH FIELD

Journal Article · Thu Jan 20 04:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/727/1/5· OSTI ID:21567632

Mosleh, Moein; Franx, Marijn ^[1]; Williams, Rik J ^[2]; Kriek, Mariska ^[3]

---

1. Leiden Observatory, Universiteit Leiden, 2300 RA Leiden (Netherlands)
2. Carnegie Observatories, Pasadena, CA 91101 (United States)
3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

We study the evolution of the size-stellar mass relation for a large spectroscopic sample of galaxies in the GOODS-North field up to z {approx} 3.5. The sizes of the galaxies are measured from K{sub s} -band images (corresponding to rest-frame optical/NIR) from the Subaru 8 m telescope. We reproduce earlier results based on photometric redshifts that the sizes of galaxies at a given mass evolve with redshift. Specifically, we compare sizes of UV-bright galaxies at a range of redshifts: Lyman-break galaxies (LBGs) selected through the U-drop technique (z {approx} 2.5-3.5), BM/BX galaxies at z {approx} 1.5-2.5, and GALEX LBGs at low redshift (z {approx} 0.6-1.5). The median sizes of these UV-bright galaxies evolve as (1 + z){sup -1.11{+-}0.13} between z {approx} 0.5and3.5. The UV-bright galaxies are significantly larger than quiescent galaxies at the same mass and redshift by 0.45 {+-} 0.09 dex. We also verify the correlation between color and stellar mass density of galaxies to high redshifts. The sizes of submillimeter galaxies in the same field are measured and compared with BM/BX galaxies. We find that the median half-light radius of SMGs is 2.90 {+-} 0.45 kpc, and there is little difference in their size distribution to the UV-bright star-forming galaxies.

• OSTI ID: 21567632
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 727; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
DENSITY
ELECTROMAGNETIC RADIATION
EVOLUTION
GALACTIC EVOLUTION
GALAXIES
MASS
PHYSICAL PROPERTIES
RADIATIONS
RED SHIFT
STARS
ULTRAVIOLET RADIATION