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Far-Ultraviolet Surveys of Globular Clusters: Searching for the Products of Stellar Collisions and Near Misses

  • C. Knigge (a1), D. R. Zurek (a2), M. M. Shara (a2), K. S. Long (a3), R. L. Gilliland (a3) and P. A. Charles (a1)...

Abstract

Far-ultraviolet (FUV) observations with the Hubble Space Telescope are an excellent way to find and study the hot, blue stellar populations in the cores of globular clusters. These populations include dynamically formed blue stragglers and interacting binaries (such as cataclysmic variables, i.e. the products of stellar collisions and near misses. Using the cluster 47 Tuc as an example, we show how the combination of FUV imaging and slitless spectroscopy can be used to uncover and study these populations.

Resumen

Las observaciones en el ultravioleta lejano (FUV) con el Telescopio Espacial Hubble (HST) proporcionan un excelente Camino para encontrar y estudiar las poblaciones de estrellas azules y calientes en los núcleos de cúmulos globulares. Estas poblaciones incluyen “stragglers” azules formadas dinámicamente y binarias que interactúan entre sí (tales como variables cataclísmicas, es decir, los productos de colisiones estelares y de cuasi-colisiones). Utilizando el cúmulo 47 Tuc como un ejemplo, mostramos cómo la combinación de imágenes FUV y de espectroscopía sin rendija pueden utilizarse para descubrir y estudiar estas poblaciones.

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Copyright

References

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Knigge, C., Zurek, D. R., Shara, M. M., & Long, K. S. 2002, ApJ, 579, 752
Knigge, C., Zurek, D. R., Shara, M. M., Long, K. S., & Gilliland, R.L. 2003, ApJ, 599, 1320

Keywords

Far-Ultraviolet Surveys of Globular Clusters: Searching for the Products of Stellar Collisions and Near Misses

  • C. Knigge (a1), D. R. Zurek (a2), M. M. Shara (a2), K. S. Long (a3), R. L. Gilliland (a3) and P. A. Charles (a1)...

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