5 papers · 1 filter
The Energy Distribution of Long Duration GRBS
Tsvi Piran, Pawan Kumar, Alin Panaitescu +1
The energy release in gamma-ray bursts is one of the most interesting clues on the nature of their "inner engines". We show here that the total energy release in GRBs varies by les…
Gas accretion in a clumpy disk with application to AGNs
Pawan Kumar
We analyze the collective gravitational interaction among gas clouds in the inner regions of galactic disks and find that it leads to accretion at a rate $\sim M_{mc}Ω(M_{mc}/M_t)^…
On the orbital decay of the PSR J0045-7319 Binary
Pawan Kumar, Eliot J. Quataert
Recent observations of PSR J0045-7319, a radio pulsar in a close eccentric orbit with a massive main sequence B-star companion, indicate that the system's orbital period is decreas…
Excitation of Solar Acoustic Oscillations
Pawan Kumar
The stochastic excitation of solar oscillations due to turbulent convection is reviewed. A number of different observational results that provide test for solar p-mode excitation t…
Asymmetries of Solar p-mode Line Profiles
Pawan Kumar, Douglas Abrams
Recent observations indicate that solar p-mode line profiles are not exactly Lorentzian, but rather exhibit varying amounts of asymmetry about their respective peaks. We analyze p-…