Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/0612428)
· On-line Data
· References in the article
· Citations to the Article (42) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
An Explanation for the Observed Weak Size Evolution of Disk Galaxies
Authors:
Somerville, Rachel S.; Barden, Marco; Rix, Hans-Walter; Bell, Eric F.; Beckwith, Steven V. W.; Borch, Andrea; Caldwell, John A. R.; Häußler, Boris; Heymans, Catherine; Jahnke, Knud; Jogee, Shardha; McIntosh, Daniel H.; Meisenheimer, Klaus; Peng, Chien Y.; Sánchez, Sebastian F.; Wisotzki, Lutz; Wolf, Christian
Affiliation:
AA(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AB(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AC(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AD(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AE(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218.; Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218.), AF(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.; Astronomisches Rechen-Institut, Mönchhofstrasse 12-14, D-69120, Heidelberg, Germany.), AG(University of Texas, McDonald Observatory, Fort Davis, TX 79734.), AH(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AI(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada.), AJ(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AK(Department of Astronomy, University of Texas at Austin, 1 University Station, C1400, Austin, TX 78712-0259.), AL(Department of Astronomy, University of Massachusetts, 710 North Pleasant Street, Amherst, MA 01003.), AM(Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany.), AN(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218.), AO(Centro Hispano Aleman de Calar Alto, C/Jesus Durban Remon 2-2, Almeria, E-04004, Spain.), AP(Astrophysikalisches Institut Potsdam, An der Sternwarte 16, Potsdam, 14482, Germany.), AQ(Department of Physics, Denys Wilkinson Building, University of Oxford, Keble Road, Oxford, OX1 3RH, UK.)
Publication:
The Astrophysical Journal, Volume 672, Issue 2, pp. 776-786. (ApJ Homepage)
Publication Date:
01/2008
Origin:
UCP
ApJ Keywords:
Cosmology: Observations, Galaxies: Evolution, Galaxies: High-Redshift, Galaxies: Spiral, Surveys
DOI:
10.1086/523661
Bibliographic Code:
2008ApJ...672..776S

Abstract

Surveys of distant galaxies with the Hubble Space Telescope and from the ground have shown that there is only mild evolution in the relationship between radial size and stellar mass for galactic disks from z~1 to the present day. Using a sample of nearby disk-dominated galaxies from the Sloan Digital Sky Survey (SDSS) and high-redshift data from the GEMS (Galaxy Evolution from Morphology and SEDs) survey, we investigate whether this result is consistent with theoretical expectations within the hierarchical paradigm of structure formation. The relationship between virial radius and mass for dark matter halos in the ΛCDM model evolves by about a factor of 2 over this interval. However, N-body simulations have shown that halos of a given mass have less centrally concentrated mass profiles at high redshift. When we compute the expected disk size-stellar mass distribution, accounting for this evolution in the internal structure of dark matter halos and the adiabatic contraction of the dark matter by the self-gravity of the collapsing baryons, we find that the predicted evolution in the mean size at fixed stellar mass since z~1 is about 15%-20%, in good agreement with the observational constraints from GEMS. At redshift z~2, the model predicts that disks at fixed stellar mass were on average only 60% as large as they are today. Similarly, we predict that the rotation velocity at a given stellar mass (essentially the zero point of the Tully-Fisher relation) is only about 10% larger at z~1 (20% at z~2) than at the present day.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints