ChemInform Abstract: Interaction of Phosphoric Anhydride with CH‐, NH‐, PH‐, and SH‐Acids

Abstract

365ChemInform Abstract (Review without refs.).

XMM-Newton Discovery of 7 s Pulsations in the Isolated Neutron Star RX J1856.5-3754

“…The tight upper limits on the pulsed fraction (!1.3% at 2 j) obtained for periods between 0.02 and 1000 s (Burwitz et al 2003) led to the speculation that RX J1856.5Ϫ3754 could be a millisecond pulsar, not yet seen to pulsate owing to the reduced sensitivity for short periods of the observations carried out up to now. Recently, an upper limit on the pulsed fraction of 2.1% (at 1 j) was reported for periods in the range 1-20 ms (Zavlin 2006). Here we report the discovery of pulsations at 7 s, obtained thanks to the very high counting statistics provided by the most recent XMMNewton observation of RX J1856.5Ϫ3754.…”

The Impact of Magnetic Field on the Thermal Evolution of Neutron Stars

“…The increasing evidence that most of the nearby NSs with reported thermal emission in the X-ray band of the electromagnetic spectrum have anisotropic surface temperature distributions (Zavlin 2007;Haberl 2007), the striking appearance of magnetars (Kaspi 2007), and the discovery of thermal emission from some high-field radio pulsars (Gonzalez et al 2005) are indicating that most NSs which can be potentially used to contrast theoretical cooling curves have actually large magnetic fields ( G). The conclusion is that a realistic NS cooling 13 B 1 10 model must not avoid the inclusion of high magnetic fields.…”

Neutron star long term cooling - Joule heating in magnetized neutron stars

“…The non-uniform distribution of the surface temperature of isolated NSs seems to be confirmed by the analysis of observational data (see reviews [1] and [2]). The mismatch between the extrapolation to low energy of the fits to X-ray spectra, and the observed Rayleigh Jeans tail in the optical band (optical excess flux), cannot be addressed with an uniform temperature.…”