Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 454, Issue 4, Pages 3664-3673Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv2245
Keywords
H II regions; galaxies: abundances; galaxies: ISM
Categories
Funding
- European Southern Observatory, Chile [386.B-0144, 089.B-0351]
- STFC [ST/K000985/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K000985/1] Funding Source: researchfish
Ask authors/readers for more resources
We acquired spectra of 141 H II regions in 10 late-type low surface brightness galaxies (LSBGs). The analysis of the chemical abundances obtained from the nebular emission lines shows that metallicity gradients are a common feature of LSBGs, contrary to previous claims concerning the absence of such gradients in this class of galaxies. The average slope, when expressed in units of the isophotal radius, is found to be significantly shallower in comparison to galaxies of high surface brightness. This result can be attributed to the reduced surface brightness range measured across their discs, when combined with a universal surface mass density-metallicity relation. With a similar argument we explain the common abundance gradient observed in high surface brightness galaxy (HSBG) discs and its approximate dispersion. This conclusion is reinforced by our result that LSBGs share the same common abundance gradient with HSBGs, when the slope is expressed in terms of the exponential disc scalelength.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available