RT Journal Article
T1 Existence of two-solar-mass neutron star constrains gravitational constant G(N) at strong field
A1 Dobado González, Antonio
A1 Llanes Estrada, Felipe José
A1 Oller, Jose Antonio
AB In general relativity, there is a maximum mass allowed for neutron stars that, if exceeded, entails collapse into a black hole. Its precise value depends on details of the nuclear matter equation of state, a subject where much progress has been accomplished thanks to low energy effective theories. The discovery of a two-solar-mass neutron star, near that maximum mass, when analyzed with modern equations of state, implies that Newton's gravitational constant in the star cannot exceed its value on Earth by more than 12% at the 95% confidence level. This significantly extends the gravitational field intensity at which the constant has been constrained at the 10% level.
PB Amer Physical Soc
SN 0556-2813
YR 2012
FD 2012-01-20
LK https://hdl.handle.net/20.500.14352/43703
UL https://hdl.handle.net/20.500.14352/43703
LA eng
NO ©2012 American Physical Society. F.J.L.-E. thanks the Caja Madrid Program for Advanced Studies for a grant and the theory group at TU-Munich for its hospitality and support via the Exzellenzcluster Origin and Structure of the Universe. This work has been supported by Grants No. 227431-HadronPhysics2 (EU), No. Consolider-CSD2007-00042, No. AIC10-D-000582, No. FPA2008-00592, No. FIS2008-01323, No. FPA2010-17806, 11871/PI/09 (Fundación Séneca, Murcia), and No. UCM-BSCH GR58/08 910309 (Spain). We thank L. Tolos for sharing her computer data with us and A. Polls for suggestions.
NO Caja Madrid Program for Advanced Studies
NO EU
NO Fundación Séneca, Murcia
DS Docta Complutense
RD 16 abr 2025