We present a measurement of the cosmic-ray electron + positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power law with a break energy at about 50 GeV. Above 50 GeV, the spectrum is well described by a single power law with a spectral index of 3.07 +/- 0.02 (stat +/- syst) +/- 0.04 (energy measurement). An exponential cutoff lower than 1.8 TeV is excluded at 95% CL.
Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope / Abdollahi, S., Ackermann, M., Ajello, M., Atwood, W.b., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Bloom, E.d., Bonino, R., Brandt, T.j., Bregeon, J., Bruel, P., Buehler, R., Cameron, R.a., Caputo, R., Caragiulo, M., Castro, D., Cavazzuti, E., Cecchi, C., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:8(2017), pp. 082007.1-082007.16. [10.1103/PhysRevD.95.082007]
Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
Longo F;Orlando E;Principe G;
2017-01-01
Abstract
We present a measurement of the cosmic-ray electron + positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power law with a break energy at about 50 GeV. Above 50 GeV, the spectrum is well described by a single power law with a spectral index of 3.07 +/- 0.02 (stat +/- syst) +/- 0.04 (energy measurement). An exponential cutoff lower than 1.8 TeV is excluded at 95% CL.| File | Dimensione | Formato | |
|---|---|---|---|
|
PhysRevD.95.082007.pdf
Accesso chiuso
Tipologia:
Documento in Versione Editoriale
Licenza:
Copyright Editore
Dimensione
1.1 MB
Formato
Adobe PDF
|
1.1 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
