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Abstract:

We report on the investigation of a very high-energy, Galactic γ-ray source recently discovered at >50 GeV using the Large Area Telescope on board Fermi. This object, 2FHL J0826.1-4500, displays one of the hardest >50 GeV spectra (photon index Γγ ∼ 1.6) in the 2FHL catalog, and a follow-up observation with XMM-Newton has uncovered diffuse, soft thermal emission at the position of the γ-ray source. A detailed analysis of the available multi-wavelength data shows that this source is located on the western edge of the Vela supernova remnant (SNR): the observations and the modeling of the spectral energy distribution support a scenario where this γ-ray source is the byproduct of the interaction between the SNR shock and a neutral hydrogen cloud. If confirmed, this shock-cloud interaction would make 2FHL J0826.1-4500 a promising candidate for efficient particle acceleration. © 2019. The American Astronomical Society. All rights reserved.

Registro:

Documento: Artículo
Título:2FHL J0826.1-4500: Discovery of a Possible Shock-Cloud Interaction on the Western Edge of the Vela Supernova Remnant
Autor:Eagle, J.; Marchesi, S.; Castro, D.; Ajello, M.; Duvidovich, L.; Tibaldo, L.
Filiación:Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, United States
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, United States
Universidad de Buenos Aires, Facultad de Cs Exactas y Naturales, Buenos Aires, Argentina
CONICET, Universidad de Buenos Aires, Instituto de Astronomia y Fisica Del Espacio (IAFE), Buenos Aires, Argentina
IRAP, Observatoire Midi-Pyrénées, France
Palabras clave:cosmic rays; ISM: supernova remnants; radiation mechanisms: thermal; shock waves
Año:2019
Volumen:870
Número:1
DOI: http://dx.doi.org/10.3847/1538-4357/aaf0ff
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_0004637X_v870_n1_p_Eagle

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Citas:

---------- APA ----------
Eagle, J., Marchesi, S., Castro, D., Ajello, M., Duvidovich, L. & Tibaldo, L. (2019) . 2FHL J0826.1-4500: Discovery of a Possible Shock-Cloud Interaction on the Western Edge of the Vela Supernova Remnant. Astrophysical Journal, 870(1).
http://dx.doi.org/10.3847/1538-4357/aaf0ff
---------- CHICAGO ----------
Eagle, J., Marchesi, S., Castro, D., Ajello, M., Duvidovich, L., Tibaldo, L. "2FHL J0826.1-4500: Discovery of a Possible Shock-Cloud Interaction on the Western Edge of the Vela Supernova Remnant" . Astrophysical Journal 870, no. 1 (2019).
http://dx.doi.org/10.3847/1538-4357/aaf0ff
---------- MLA ----------
Eagle, J., Marchesi, S., Castro, D., Ajello, M., Duvidovich, L., Tibaldo, L. "2FHL J0826.1-4500: Discovery of a Possible Shock-Cloud Interaction on the Western Edge of the Vela Supernova Remnant" . Astrophysical Journal, vol. 870, no. 1, 2019.
http://dx.doi.org/10.3847/1538-4357/aaf0ff
---------- VANCOUVER ----------
Eagle, J., Marchesi, S., Castro, D., Ajello, M., Duvidovich, L., Tibaldo, L. 2FHL J0826.1-4500: Discovery of a Possible Shock-Cloud Interaction on the Western Edge of the Vela Supernova Remnant. Astrophys. J. 2019;870(1).
http://dx.doi.org/10.3847/1538-4357/aaf0ff