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A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope
- Source :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 524, pp.A75. ⟨10.1051/0004-6361/201014458⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname, Astronomy and Astrophysics-A&A, 2010, 524, pp.A75. ⟨10.1051/0004-6361/201014458⟩
- Publication Year :
- 2010
-
Abstract
- 11 páginas.<br />Globular clusters with their large populations of millisecond pulsars (MSPs) are believed to be potential emitters of high-energy gamma-ray emission. Our goal is to constrain the millisecond pulsar populations in globular clusters from analysis of gamma-ray observations. We use 546 days of continuous sky-survey observations obtained with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope to study the gamma-ray emission towards 13 globular clusters. Steady point-like high-energy gamma-ray emission has been significantly detected towards 8 globular clusters. Five of them (47 Tucanae, Omega Cen, NGC 6388, Terzan 5, and M 28) show hard spectral power indices $(0.7 < \Gamma
- Subjects :
- [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
Astrophysics::High Energy Astrophysical Phenomena
Population
Gamma rays: general
general [Pulsars]
general [Gamma rays]
Globular clusters: general
FOS: Physical sciences
pulsars: general
globular clusters: general
gamma rays: general
Fermi satellite
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
High Energy Gamma-ray Astronomy
Globular Clusters
Luminosity
Galaxy groups and clusters
Millisecond pulsar
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
education
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
Spectral index
education.field_of_study
010308 nuclear & particles physics
[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
Astronomy
Astronomy and Astrophysics
Astrophysics - Astrophysics of Galaxies
Pulsars: general
Star cluster
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Globular cluster
general [Globular clusters]
Astrophysics - High Energy Astrophysical Phenomena
Fermi Gamma-ray Space Telescope
Subjects
Details
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 524, pp.A75. ⟨10.1051/0004-6361/201014458⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname, Astronomy and Astrophysics-A&A, 2010, 524, pp.A75. ⟨10.1051/0004-6361/201014458⟩
- Accession number :
- edsair.doi.dedup.....620d3a5968a59cae20f6f0316f0308f5