• Publications
  • Influence
Dynamical fate of wide binaries in the solar neighborhood
An analytical model is presented for the evolution of wide binaries in the Galaxy. The study is pertinent to the postulated solar companion, Nemesis, which may disturb the Oort cloud and cause
A Relativistic Model of Pulsar Polarization
The rotating vector model of pulsar polarization of Radhakrishnan and Cooke (1969) is extended here to include first-order special relativistic effects. The model predicts that the centroid of the
Supergiant pulses from extragalactic neutron stars
We consider radio bursts that originate from extragalactic neutron stars (NSs) by addressing three questions about source distances. What are the physical limitations on coherent radiation at GHz
Masses, radii, and magnetic fields of pulsating X-ray sources : is the "standard" model self-consistent ?
We present prototype calculations for Her X-1 and 4U 0115+63 which are designed to test the ''standard'' model of a pulsating X-ray source for self-consistency. We construct ''semiempirical''
Saturation of the R mode instability
Rossby waves (r-modes) in rapidly rotating neutron stars are unstable because of the emission of gravitational radiation. As a result, the stellar rotational energy is converted into both
On the origins of galaxies, galactic angular momenta, and galactic magnetic fields.
We show that if we assume the existence of a disordered cosmic magnetic field at recombination, then, provided the field varies on a comoving scale corresponding to a typical galactic mass, we can
Lensing of Fast Radio Bursts by Plasma Structures in Host Galaxies
The amplitudes of fast radio bursts (FRBs) can be strongly modulated by plasma lenses in their host galaxies, including that of the repeating FRB 121102 at ∼1 Gpc luminosity distance. Caustics
Radio Wave Propagation and the Provenance of Fast Radio Bursts
We analyze plasma dispersion and scattering of fast radio bursts (FRBs) to identify the dominant locations of free electrons along their lines of sight and thus constrain the distances of the burst
Nonlinear mode coupling in rotating stars and the r-mode instability in neutron stars
We develop the formalism required to study the nonlinear interaction of modes in rotating Newtonian stars in the weakly nonlinear regime. The formalism simplifies and extends previous treatments. At
Neutrino-driven winds from young, hot neutron stars
Questions raised by the study of Salpeter and Shapiro (1981) of neutrino and photon emission from a young, hot neutron star are addressed. The general coupled hydrodynamical-radiative transport