5 papers
Recent Breakthroughs in Detecting Neutron Star Binaries in Globular Clusters
Peter D. Edmonds
Binary stars have long been considered to play a crucial role in globular cluster evolution, and offer the advantages of studying systems at the same, well-determined distances. Ho…
X-ray and Optical Studies of Millisecond Pulsars in 47 Tucanae
C. O. Heinke, J. E. Grindlay, P. D. Edmonds +1
Our Chandra X-ray observation of the globular cluster 47 Tuc clearly detected most of the 16 MSPs with precise radio positions, and indicates probable X-ray emission from the remai…
Chandra on Millisecond Pulsars in Globular Clusters
J. E. Grindlay, C. O. Heinke, P. D. Edmonds +1
We summarize the x-ray properties of the complete samples of millisecond pulsars (MSPs) detected in our Chandra observations of the globular clusters 47 Tuc and NGC 6397. The 47 Tu…
Variability and Spectra of Two Neutron Stars in 47 Tucanae
C. O. Heinke, J. E. Grindlay, D. A. Lloyd +1
We report spectral and variability analysis of two quiescent low mass x-ray binaries (previously identified with ROSAT HRI as X5 and X7) in the globular cluster 47 Tuc, from a Chan…
A Lack of Planets in 47 Tucanae from an HST Search
Ronald L. Gilliland, T. M. Brown, P. Guhathakurta +21
We report results from a large Hubble Space Telescope project to observe a significant (~34,000) ensemble of main sequence stars in the globular cluster 47 Tucanae with a goal of d…