126 citations · 409 across the 7 of their papers we have counts for
4 papers · 1 filter
Asymptotics with a positive cosmological constant: III. The quadrupole formula
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
Almost a century ago, Einstein used a weak field approximation around Minkowski space-time to calculate the energy carried away by gravitational waves emitted by a time changing ma…
Gravitational waves from isolated systems: Surprising consequences of a positive cosmological constant
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive cosmological constant , however tiny. In pa…
Asymptotics with a positive cosmological constant: II. Linear fields on de Sitter space-time
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
Linearized gravitational waves in de Sitter space-time are analyzed in detail to obtain guidance for constructing the theory of gravitational radiation in presence of a positive co…
Non-local bispectra from super cosmic variance
Bekir Baytaş, Aruna Kesavan, Elliot Nelson +2
We present examples of non-Gaussian statistics that can induce bispectra matching local and non-local (including equilateral) templates in biased sub-volumes. We find cases where t…