Deep Chandra Observations of Millisecond Pulsars in 47 Tucanae

Details Deep Chandra Observations of Millisecond Pulsars in 47 Tucanae Deep Chandra Observations of Millisecond Pulsars in 47 Tucanae

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517201b&link_type=abstract

American Astronomical Society Meeting 205, #172.01; Bulletin of the American Astronomical Society, Vol. 37, p.376

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a detailed spectral analysis of Chandra X-ray Observatory ACIS-S observations of the 17 millisecond pulsars (MSPs) with precise positions in the globular cluster 47 Tucanae (NGC 104). The X-ray emission from most of the MSPs is consistent with a thermal (blackbody or neutron star atmosphere) spectrum with a temperature Teff ˜ (1-3) x 106 K, emission radius Reff ˜ 0.1-2 km, and luminosity LX ˜ 1031 ergs s-1 (0.3-8 keV). The observed emission most likely originates from the heated magnetic polar caps of the MSPs. The eclipsing binary MSPs 47 Tuc J and W exhibit predominantly non-thermal (power-law) emission, with photon index Γ ˜ 1-1.5, which probably originates in an intrabinary shock formed due to interaction between the relativistic pulsar wind and matter from the stellar companion.

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