SIMBAD references

2016ApJ...827...41Y - Astrophys. J., 827, 41-41 (2016/August-2)

Studying the SGR 1806-20/Cl* 1806-20 region using the Fermi large area telescope.

YEUNG P.K.H., KONG A.K.H., TAM P.H.T., LIN L.C.C., HUI C.Y., HU C.-P. and CHENG K.S.

Abstract (from CDS):

The region around SGR 1806-20 and its host stellar cluster Cl* 1806-20 is a potentially important site of particle acceleration. The soft γ-ray repeater and Cl* 1806-20, which also contains several very massive stars including a luminous blue variable hypergiant LBV 1806-20, are capable of depositing a large amount of energy to the surroundings. Using the data taken with the Fermi Large Area Telescope (LAT), we identified an extended LAT source to the southwest of Cl* 1806-20. The centroid of the 1-50 GeV emission is consistent with that of HESS J1808-204 (until now unidentified). The LAT spectrum is best-fit by a broken power law with the break energy {E}_{\}=297±15 MeV. The index above E_b is 2.60±0.04 and is consistent with the flux and spectral index above 100 GeV for HESS J1808-204, suggesting an association between the two sources. Meanwhile, the interacting supernova remnant SNR G9.7-0.0 is also a potential contributor to the LAT flux. A tentative flux enhancement at the MeV band during a 45 day interval (2011 January 21-March 7) is also reported. We discuss possible origins of the extended LAT source in the context of both leptonic and hadronic scenarios.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmic rays - ISM: individual objects: SNR G9.7-0.0, HESS J1808-204, W31 - pulsars: individual: SGR 1806-20 - stars: magnetars - stars: magnetars

Simbad objects: 18

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2020.10.29-22:06:15

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