Observations of 20 Millisecond Pulsars in 47 Tucanae at 20 Centimeters
نویسندگان
چکیده
منابع مشابه
Millisecond Radio Pulsars in 47 Tucanae
We review the properties of the 22 millisecond radio pulsars currently known in the globular cluster 47 Tucanae, and their implications for the mass and gas content of the cluster. Further details can be found in the publications from this project to date (Camilo et al. 2000; Freire 2000; Freire et al. 2001a,b; Freire et al. 2003). Throughout the review, we look ahead to the future results anti...
متن کاملTiming the millisecond pulsars in 47 Tucanae
In the last ten years 20 millisecond pulsars have been discovered in the globular cluster 47 Tucanae. Hitherto, only three of these pulsars had published timing solutions. Here we improve upon these three and present 12 new solutions. These measurements can be used to determine a variety of physical properties of the pulsars and of the cluster. The 15 pulsars have positions determined with typi...
متن کاملChandra X-ray Observations of Nineteen Millisecond Pulsars in the Globular Cluster 47 Tucanae
We present spectral and long-timescale variability analyses of Chandra X-ray Observatory ACISS observations of the 19 millisecond pulsars (MSPs) with precisely known positions in the globular cluster 47 Tucanae. The X-ray emission of the majority of these MSPs is well described by a thermal (blackbody or neutron star hydrogen atmosphere) spectrum with a temperature Teff ∼ (1 − 3)× 10 K, emissio...
متن کاملRadio Pulse Properties of the Millisecond Pulsar Psr J0437[4715. I. Observations at 20 Centimeters
We present a total of 48 minutes of observations of the nearby, bright millisecond pulsar PSR J0437[4715 taken at the Parkes Observatory in Australia. The data were obtained at a central radio frequency of 1380 MHz using a high-speed tape recorder that permitted coherent Nyquist sampling of 50 MHz of bandwidth in each of two polarizations. Using the high time resolution available from this volt...
متن کاملVariability of 19 Millisecond Pulsars in 47 Tucanae with Chandra Hrc-s
We present results from our 830 ks observation of the globular cluster 47 Tucanae with the Chandra X-ray Observatory’sHigh Resolution Camera-S. We limit our analysis here to the 19 previously known, localized millisecond pulsars (MSPs) in the cluster. This work more than doubles the sample of X-rayYdetected MSPs observed with sensitivity to rotational variability; it is also the first survey of...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2000
ISSN: 0004-637X,1538-4357
DOI: 10.1086/308859