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Fermi LAT Gamma-ray Detections of Classical Novae V1369 Centauri 2013 and V5668 Sagittarii 2015 | C.C. Cheung
; P. Jean
; S.N. Shore
; L. Stawarz
; R.H.D. Corbet
; J. Knodlseder
; S. Starrfield
; D.L. Wood
; R. Desiante
; F. Longo
; G. Pivato
; K.S. Wood
; | Date: |
13 May 2016 | Abstract: | We report the Fermi Large Area Telescope (LAT) detections of high-energy
(>100 MeV) gamma-ray emission from two recent optically bright classical novae,
V1369 Centauri 2013 and V5668 Sagittarii 2015. At early times, Fermi
target-of-opportunity observations prompted by their optical discoveries
provided enhanced LAT exposure that enabled the detections of gamma-ray onsets
beginning ~2 days after their first optical peaks. Significant gamma-ray
emission was found extending to 39-55 days after their initial LAT detections,
with systematically fainter and longer duration emission compared to previous
gamma-ray detected classical novae. These novae were distinguished by multiple
bright optical peaks that encompassed the timespans of the observed gamma rays.
The gamma-ray light curves and spectra of the two novae are presented along
with representative hadronic and leptonic models, and comparisons to other
novae detected by the LAT are discussed. | Source: | arXiv, 1605.4216 | Services: | Forum | Review | PDF | Favorites |
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