Next Article in Journal
First Results from a Panchromatic HST/WFC3 Imaging Study of the Young, Rapidly Evolving Planetary Nebulae NGC 7027 and NGC 6302
Next Article in Special Issue
Debate on the Physics of Galactic Rotation and the Existence of Dark Matter
Previous Article in Journal / Special Issue
Debated Models for Galactic Rotation Curves: A Review and Mathematical Assessment

Surface Brightness Plateau in S4G Galaxies

Independent Researcher, London NW8, UK
Independent Researcher, Glenview, IL 60025, USA
Author to whom correspondence should be addressed.
Galaxies 2020, 8(2), 48;
Received: 7 May 2020 / Revised: 29 May 2020 / Accepted: 3 June 2020 / Published: 6 June 2020
Using 3.6-μm data from 2112 galaxies, we show that, contrary to widely held expectations of a continuous steep decline, radial surface brightness profiles of galaxies tend to flatten and form extended plateaus beyond 27–28 magAB/arcsec2. This phenomenon could be explained by the presence of extended stellar populations dominated by low-mass stars in galactic outskirts. The flattening of radial brightness profiles questions the artificial exponential extrapolations of brightness data and the automatic assumption that light always declines considerably faster than mass density, presenting an empirical challenge for the dark matter hypothesis. View Full-Text
Keywords: galaxies; surface brightness profiles galaxies; surface brightness profiles
Show Figures

Figure 1

MDPI and ACS Style

Sipols, A.; Pavlovich, A. Surface Brightness Plateau in S4G Galaxies. Galaxies 2020, 8, 48.

AMA Style

Sipols A, Pavlovich A. Surface Brightness Plateau in S4G Galaxies. Galaxies. 2020; 8(2):48.

Chicago/Turabian Style

Sipols, Alan, and Alex Pavlovich. 2020. "Surface Brightness Plateau in S4G Galaxies" Galaxies 8, no. 2: 48.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop