TY - JOUR
T1 - Fitting rotation curves of galaxies by de Rham-Gabadadze-Tolley massive gravity
AU - Panpanich, Sirachak
AU - Burikham, Piyabut
N1 - Funding Information:
We would like to thank a referee for valuable and useful comments that led to a better version of the paper. S. P. is supported by Rachadapisek Sompote Fund for Postdoctoral Fellowship, Chulalongkorn University. P. B. is supported in part by the Thailand Research Fund (TRF), Office of Higher Education Commission (OHEC) and Chulalongkorn University under Grant No. RSA6180002.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/9/11
Y1 - 2018/9/11
N2 - We investigate the effects of massive gravitons on the rotation curves of the Milky Way, spiral galaxies, and low surface brightness (LSB) galaxies. Using a simple de Rham, Gabadadze, and Tolley (dRGT) massive gravity model, we find a static spherically symmetric metric and a modified Tolman-Oppenheimer-Volkoff (TOV) equation. The dRGT nonlinear graviton interactions generate density and pressures, which behave like dark energy that can mimic the gravitational effects of a dark matter halo. We find that rotation curves of most galaxies can be fitted well by a single constant-gravity parameter γ∼mg2C∼10-28 m-1 corresponding to the graviton mass in the range mg∼10-21-10-30 eV depending on the choice of the fiducial metric parameter C∼1-1018 m. Fitting the rotation curve of the Milky Way puts a strong constraint on the Yukawa-type coupling of the massive graviton exchange as a result of the shell effects.
AB - We investigate the effects of massive gravitons on the rotation curves of the Milky Way, spiral galaxies, and low surface brightness (LSB) galaxies. Using a simple de Rham, Gabadadze, and Tolley (dRGT) massive gravity model, we find a static spherically symmetric metric and a modified Tolman-Oppenheimer-Volkoff (TOV) equation. The dRGT nonlinear graviton interactions generate density and pressures, which behave like dark energy that can mimic the gravitational effects of a dark matter halo. We find that rotation curves of most galaxies can be fitted well by a single constant-gravity parameter γ∼mg2C∼10-28 m-1 corresponding to the graviton mass in the range mg∼10-21-10-30 eV depending on the choice of the fiducial metric parameter C∼1-1018 m. Fitting the rotation curve of the Milky Way puts a strong constraint on the Yukawa-type coupling of the massive graviton exchange as a result of the shell effects.
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U2 - 10.1103/PhysRevD.98.064008
DO - 10.1103/PhysRevD.98.064008
M3 - Article
AN - SCOPUS:85054534174
SN - 2470-0010
VL - 98
JO - Physical Review D
JF - Physical Review D
IS - 6
M1 - 064008
ER -