Dark halos and Tully-Fisher relation testing modified gravity

TL;DR

This paper uses galactic halo data and the Tully-Fisher relation to test weak field General Relativity with a cosmological constant, confirming the effectiveness of these methods for evaluating modified gravity models.

Contribution

It demonstrates the utility of combining dark halo observations and the Tully-Fisher relation to constrain and test modified gravity theories.

Findings

Results align with previous spiral galaxy studies.

Scaling relations for halos are consistent with expectations.

Validates the use of halo data and BTFR in gravity testing.

Abstract

We involve the galactic halo observational data to test the weak field General Relativity involving the cosmological constant. Using the data for 15 hydrogen (Hi) VLA super spirals and the Tully-Fisher relation we obtain constraints for each galaxy. The results are consistent with previous results for spiral galaxies, as well as with the scaling relations for the halos, thus confirming the efficiency of the use of dark halo data and Tully-Fisher relation, including the baryonic Tully{Fisher index (BTFR), for testing modified gravity models.