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https://hdl.handle.net/2440/50809
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Type: | Journal article |
Title: | HESS upper limit on the very high energy γ-ray emission from the globular cluster 47 Tucanae |
Other Titles: | HESS upper limit on the very high energy gamma-ray emission from the globular cluster 47 Tucanae |
Author: | Aharonian, F. Akhperjanian, A. Anton, G. Barres de Almaida, U. Bazer-Bachi, A. Becherini, Y. Behera, B. Bernlohr, K. Boisson, C. Bochow, A. Borrel, V. Braun, I. Brion, E. Brucker, J. Brun, P. Buhler, R. Bulik, T. Busching, I. Boutelier, T. Chadwick, P. et al. |
Citation: | Astronomy and Astrophysics: a European journal, 2009; 499(1):273-277 |
Publisher: | E D P Sciences |
Issue Date: | 2009 |
ISSN: | 0004-6361 1432-0746 |
Statement of Responsibility: | F. Aharonian ... G. Rowell ... et al. |
Abstract: | Observations of the globular cluster 47 Tucanae (NGC 104), which contains at least 23 ms pulsars, were performed with the HESS telescope system. The observations lead to an upper limit of F(E < 800 GeV) < 6.7 × 10-13 cm-2 s-1 on the integral γ-ray photon flux from 47 Tucanae. Considering millisecond pulsars as the unique potential source of γ-rays in the globular cluster, constraints based on emission models are derived: on the magnetic field in the average pulsar nebula and on the conversion efficiency of spin-down power to γ-ray photons or to relativistic leptons. © 2009 ESO. |
Keywords: | Galaxy: globular clusters: individual: 47 Tucanae stars: pulsars: general gamma rays: observations |
Rights: | Copyright © ESO 2009 |
DOI: | 10.1051/0004-6361/200811564 |
Published version: | http://dx.doi.org/10.1051/0004-6361/200811564 |
Appears in Collections: | Aurora harvest 5 Chemistry and Physics publications |
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hdl_50809.pdf | Published version | 232.6 kB | Adobe PDF | View/Open |
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