Finding Pulsar Emission Heights from Dual–Frequency Observations
نویسندگان
چکیده
منابع مشابه
High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar
We present results of a 3D model of optical to γ-ray emission from the slot gap accelerator of a rotation-powered pulsar. Primary electrons accelerating to high-altitudes in the unscreened electric field of the slot gap reach radiationreaction limited Lorentz factors of ∼ 2× 10, while electron-positron pairs from lower-altitude cascades flow along field lines interior to the slot gap. The curva...
متن کاملSimulated synchrotron emission from Pulsar Wind Nebulae
Aims. A complete set of diagnostic tools aimed at producing synthetic synchrotron emissivity, polarization, and spectral index maps from relativistic MHD simulations is presented. As a first application we consider here the case of the emission from Pulsar Wind Nebulae (PWNe). Methods. The proposed method is based on the addition, on top of the basic set of MHD equations, of an extra equation d...
متن کاملUnpulsed Optical Emission from the Crab Pulsar
Using the high speed 2-d TRIFFID photometer, we have obtained phase resolved photometry of the Crab pulsar in UBV that allows us to flux the unpulsed light curve component. Following de-extinction, weighted least-square fitting indicates a power-law exponent of α = -0.62 ± 0.49. This is steeper than that reported for the peak components and its origin remains unclear with respect to contemporar...
متن کاملToward An Empirical Theory of Pulsar Emission. VII. On the Spectral Behavior of Conal Beam Radii and Emission Heights
In this paper we return to the old problem of conal component-pair widths and profile dimensions. Observationally, we consider a set of 10 pulsars with prominent conal component pairs, for which well measured profiles exist over the largest frequency range now possible. Apart from some tendency to narrow at high frequency, the conal components exhibit almost constant widths. We use all three pr...
متن کاملPulsar Emission Spectrum
Here we calculate pulsar emission, apparently from first principles, i.e., without any arbitrary assumptions. Our method applies to weak pulsars. A pulsar is called weak if pair production near the light cylinder is negligible compared to Goldreich-Julian density [1] per rotation. The weak pulsar approximation must be accurate for some, and perhaps meaningful for most, Fermi [2] pulsars. We tre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100059510