(136) Production(s) de BREGEON J.

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The Vela Pulsar: Results from the First Year of Fermi LAT Observations

Auteur(s): A. Abdo A., Ballet J., Bellazzini R., Bregeon J., Bruel P., M. Casandjian J., Cohen-Tanugi J., Dumora D., Farnier C., J. Fegan S., Fortin P., Giebels B., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Pierbattista M., Piron F., Reposeur T., Sgro C., A. Smith D., Starck J.-L., Tibaldo L.

(Article) Publié: The Astrophysical Journal / The Astrophysical Journal Letters, vol. 713 p.154-165 (2010)
Texte intégral en Openaccess :

Fermi Large Area Telescope observations of the Vela-X Pulsar Wind Nebula

Auteur(s): Abdo A.A., Ballet J., Bregeon J., Bruel P., M. Casandjian J., Cohen-Tanugi J., Dumora D., Farnier C., J. Fegan S., Fortin P., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Pierbattista M., Piron F., Reposeur T., Sanchez D., D. Scargle J., Sgro C., A. Smith D., Tibaldo L., Vilchez N.

(Article) Publié: The Astrophysical Journal / The Astrophysical Journal Letters, vol. 713 p.146-153 (2010)
Texte intégral en Openaccess :

Discovery of Pulsed $\gamma$-rays from PSR J0034-0534 with the Fermi LAT: A Case for Co-located Radio and $\gamma$-ray Emission Regions

Auteur(s): A. Abdo A., Ballet J., Bellazzini R., Bregeon J., Bruel P., M. Casandjian J., Cognard I., Cohen-Tanugi J., Desvignes G., Dumora D., Farnier C., J. Fegan S., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Pierbattista M., Piron F., Reposeur T., D. Scargle J., Sgro C., A. Smith D., Starck J.-L.

(Article) Publié: The Astrophysical Journal / The Astrophysical Journal Letters, vol. 712 p.957-963 (2010)
Texte intégral en Openaccess :

Fermi detection of delayed GeV emission from the short GRB 081024B

Auteur(s): A. Abdo A., Ballet J., Bellazzini R., Bregeon J., Bruel P., M. Casandjian J., Charles E., Cohen-Tanugi J., Dumora D., Farnier C., J. Fegan S., Fortin P., Giebels B., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Komin Nukri, Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Piron F., Reposeur T., Sanchez D., Sgro C., A. Smith D.

(Article) Publié: The Astrophysical Journal / The Astrophysical Journal Letters, vol. 712 p.558-564 (2010)
Texte intégral en Openaccess :

Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models

Auteur(s): Abdo A. A., Ackermann M., Ballet J., Bellazzini R., Bregeon J., Bruel P., Casandjian J. M., Cohen-Tanugi J., Dumora D., Farnier C., Fegan S. J., Fortin P., Giebels B., Grenier I. A., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Piron F., Reposeur T., Sgro C., Smith D. A., Thayer J. B., Tibaldo L., Vilchez N.

(Article) Publié: The Astrophysical Journal / The Astrophysical Journal Letters, vol. 712 p.147-158 (2010)
Texte intégral en Openaccess :

Ref HAL: in2p3-00473736_v1
Ref Arxiv: 1001.4531
DOI: 10.1088/0004-637X/712/1/147
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
233 citations
Résumé:

We report on the observations of 14 dwarf spheroidal galaxies with the Fermi Gamma-Ray Space Telescope taken during the first 11 months of survey mode operations. The Fermi telescope provides a new opportunity to test particle dark matter models through the expected gamma-ray emission produced by pair annihilation of weakly interacting massive particles (WIMPs). Local Group dwarf spheroidal galaxies, the largest galactic substructures predicted by the cold dark matter scenario, are attractive targets for such indirect searches for dark matter because they are nearby and among the most extreme dark matter dominated environments. No significant gamma-ray emission was detected above 100 MeV from the candidate dwarf galaxies. We determine upper limits to the gamma-ray flux assuming both power-law spectra and representative spectra from WIMP annihilation. The resulting integral flux above 100 MeV is constrained to be at a level below around 10^-9 photons cm^-2 s^-1. Using recent stellar kinematic data, the gamma-ray flux limits are combined with improved determinations of the dark matter density profile in 8 of the 14 candidate dwarfs to place limits on the pair annihilation cross-section of WIMPs in several widely studied extensions of the standard model. With the present data, we are able to rule out large parts of the parameter space where the thermal relic density is below the observed cosmological dark matter density and WIMPs (neutralinos here) are dominantly produced non-thermally, e.g. in models where supersymmetry breaking occurs via anomaly mediation. The gamma-ray limits presented here also constrain some WIMP models proposed to explain the Fermi and PAMELA e^+e^- data, including low-mass wino-like neutralinos and models with TeV masses pair-annihilating into muon-antimuon pairs. (Abridged)

Commentaires: 25 pages, 4 figures, accepted to ApJ, Corresponding authors: J. Cohen-Tanugi, C. Farnier, T.E. Jeltema, E. Nuss, and S. Profumo

The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data

Auteur(s): A. Abdo A., Ballet J., Bellazzini R., Bregeon J., Bruel P., M. Casandjian J., Charles E., Cohen-Tanugi J., Dumora D., Farnier C., J. Fegan S., Fortin P., Giebels B., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Piron F., Reposeur T., Sanchez D., Sgro C., A. Smith D., Starck J.-L., Tibaldo L.

(Article) Publié: Physical Review Letters, vol. 104 p.101101 (2010)
Texte intégral en Openaccess :

Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications

Auteur(s): Abdo A. A., Ackermann M., Ajello M., Ballet J., Bellazzini R., Bregeon J., Bruel P., Casandjian J. M., Cohen-Tanugi J., Dumora D., Farnier C., Fegan S. J., Fortin P., Grenier I. A., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lott B., Nuss E., Parent D., Pelassa V., Piron F., Reposeur T., Sgró C., Smith D. A., Starck J. -L., Thayer J. B., Tibaldo L., Vilchez N.

(Article) Publié: Physical Review Letters, vol. 104 p.091302 (2010)
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(136) Production(s) de BREGEON J.