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Disc scalelengths out to redshift 5.8
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Astronomy.
2012 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 423, no 1, l112-L116 p.Article in journal (Refereed) Published
Abstract [en]

We compute the exponential disc scalelength for 686 disc galaxies with spectroscopic redshifts out to redshift 5.8 based on Hubble Space Telescope archival data. We compare the results with our previous measurements based on 30 000 nearby galaxies from the Sloan Digital Sky Survey. Our results confirm the presence of a dominating exponential component in galaxies out to this redshift. At the highest redshifts, the disc scalelength for the brightest galaxies with absolute magnitude between -24 and -22 is up to a factor of 8 smaller compared to that in the local Universe. This observed scalelength decrease is significantly greater than the value predicted by a cosmological picture in which baryonic disc scalelength scales with the virial radius of the dark matter halo.

Place, publisher, year, edition, pages
2012. Vol. 423, no 1, l112-L116 p.
Keyword [en]
galaxies: evolution, galaxies: high-redshift, galaxies: structure
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-79888DOI: 10.1111/j.1745-3933.2012.01270.xISI: 000304813500024OAI: oai:DiVA.org:su-79888DiVA: diva2:551832
Note

AuthorCount:4;

Available from: 2012-09-12 Created: 2012-09-11 Last updated: 2017-12-07Bibliographically approved

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Fathi, KambizGatchell, Michael
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