ar X iv : a st ro - p h / 06 01 33 7 v 1 1 6 Ja n 20 06 A Radio Pulsar Spinning at 716 Hz Jason

ar X iv : a st ro - p h / 06 01 33 7 v 1 16 J an 2 00 6 A Radio Pulsar Spinning at 716 Hz

X iv :a st ro -p h/ 06 01 33 7 v1 16 J an 2 00 6 A Radio Pulsar Spinning at 716 Hz Jason W. T. Hessels, Scott M. Ransom, Ingrid H. Stairs, Paulo C. C. Freire, Victoria M. Kaspi, and Fernando Camilo Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada NRAO, 520 Edgemont Rd., Charlottesville, VA 22903, USA Department of Physics and Astronomy, University of British Columbia, 6224...

ar X iv : a st ro - p h / 06 01 12 1 v 1 6 Ja n 20 06 RESOLVING THE STELLAR OUTSKIRTS OF M 31 AND M 33

Many clues about the galaxy assembly process lurk in the faint outer regions of galaxies. The low surface brightnesses of these parts pose a significant challenge for studies of diffuse light, and few robust constraints on galaxy formation models have been derived to date from this technique. Our group has pioneered the use of extremely wide-area star counts to quantitatively address the large-...

ar X iv : a st ro - p h / 02 06 16 6 v 1 1 1 Ju n 20 02 How fast could a proto - pulsar rotate ?

According to two estimated relations between the initial period and the dynamo-generated magnetic dipole field of pulsars, we calculate the statistical distributions of pulsar initial periods. It is found that proto-pulsars are very likely to have rotation periods between 20 and 30 ms, and that most of the pulsars rotate initially at a period < 60 ms.

ar X iv : a st ro - p h / 04 06 56 7 v 1 2 4 Ju n 20 04 1

ar X iv : a st ro - p h / 06 01 53 0 v 1 2 4 Ja n 20 06 A Braking Index for the Young Pulsar at the Center of the Supernova Remnant Kes 75

We present the first phase-coherent measurement of a braking index for the young, energetic and high magnetic field pulsar, PSR J1846−0258, located at the center of the supernova remnant Kes 75. We present two consistent timing solutions from a phase-coherent timing analysis over 2 yr and a partially phasecoherent timing analysis of 6 yr of widely spaced data obtained with the Rossi X-ray Timin...