The link between the baryonic mass distribution and the rotation curve shape

R. A. Swaters*, R. Sancisi, J. M. van der Hulst, T. S. van Albada

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

33 Citaten (Scopus)
204 Downloads (Pure)


The observed rotation curves of disc galaxies, ranging from late-type dwarf galaxies to early-type spirals, can be fitted remarkably well simply by scaling up the contributions of the stellar and H?i discs. This baryonic scaling model can explain the full breadth of observed rotation curves with only two free parameters. For a small fraction of galaxies, in particular early-type spiral galaxies, H?i scaling appears to fail in the outer parts, possibly due to observational effects or ionization of H?i. The overall success of the baryonic scaling model suggests that the well-known global coupling between the baryonic mass of a galaxy and its rotation velocity (known as the baryonic TullyFisher relation) applies at a more local level as well, and it seems to imply a link between the baryonic mass distribution and the distribution of total mass (including dark matter).

Originele taal-2English
Pagina's (van-tot)2299-2308
Aantal pagina's10
TijdschriftMonthly Notices of the Royal Astronomical Society
Nummer van het tijdschrift3
StatusPublished - sep-2012

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