Bibcode
Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.; Antoranz, P.; Babic, A.; Banerjee, B.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Biasuzzi, B.; Biland, A.; Blanch, O.; Bonnefoy, S.; Bonnoli, G.; Borracci, F.; Bretz, T.; Carmona, E.; Carosi, A.; Chatterjee, A.; Clavero, R.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Caneva, G.; De Lotto, B.; de Oña Wilhelmi, E.; Delgado Mendez, C.; Di Pierro, F.; Dominis Prester, D.; Dorner, D.; Doro, M.; Einecke, S.; Eisenacher Glawion, D.; Elsaesser, D.; Fernández-Barral, A.; Fidalgo, D.; Fonseca, M. V.; Font, L.; Frantzen, K.; Fruck, C.; Galindo, D.; García López, R. J.; Garczarczyk, M.; Garrido Terrats, D.; Gaug, M.; Giammaria, P.; Godinović, N.; González Muñoz, A.; Guberman, D.; Hanabata, Y.; Hayashida, M.; Herrera, J.; Hose, J.; Hrupec, D.; Hughes, G.; Idec, W.; Kellermann, H.; Kodani, K.; Konno, Y.; Kubo, H.; Kushida, J.; La Barbera, A.; Lelas, D.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; López-Coto, R.; López-Oramas, A.; Lorenz, E.; Majumdar, P.; Makariev, M.; Mallot, K.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Marcote, B.; Mariotti, M.; Martínez, M.; Mazin, D.; Menzel, U.; Miranda, J. M.; Mirzoyan, R.; Moralejo, A.; Nakajima, D.; Neustroev, V.; Niedzwiecki, A.; Nievas Rosillo, M.; Nilsson, K.; Nishijima, K. et al.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 582, id.A67, 7 pp.
Fecha de publicación:
10
2015
Revista
Número de citas
21
Número de citas referidas
19
Descripción
Context. In the last five years the Fermi Large Area Telescope (LAT)
instrument detected GeV γ-ray emission from five novae. The GeV
emission can be interpreted in terms of an inverse Compton process of
electrons accelerated in a shock. In this case it is expected that
protons in the same conditions can be accelerated to much higher
energies. Consequently they may produce a second component in the
γ-ray spectrum at TeV energies. Aims: We aim to explore the
very high-energy domain to search for γ-ray emission above 50 GeV
and to shed light on the acceleration process of leptons and hadrons in
nova explosions. Methods: We have performed observations, with
the MAGIC telescopes of the classical nova V339 Del shortly after the
2013 outburst; optical and subsequent GeV γ-ray detections
triggered the MAGIC observations. We also briefly report on VHE
observations of the symbiotic nova YY Her and the dwarf nova
ASASSN-13ax. We complement the TeV MAGIC observations with the analysis
of contemporaneous Fermi-LAT data of the sources. The TeV and GeV
observations are compared in order to evaluate the acceleration
parameters for leptons and hadrons. Results: No significant TeV
emission was found from the studied sources. We computed upper limits on
the spectrum and night-by-night flux. The combined GeV and TeV
observations of V339 Del limit the ratio of proton to electron
luminosities to Lp ≲ 0.15 Le.
Appendix A is available in electronic form at http://www.aanda.org
Proyectos relacionados
Astrofísica de Partículas
El Grupo de Astrofísica de Partículas del IAC participa activamente en tres grandes colaboraciones internacionales de astrofísica de muy altas energías: AMS (Alpha Magnetic Spectrometer), los telescopios de radiación Cherenkov MAGIC I y II, y el Cherenkov Telescope Array (CTA). AMS es un detector de partículas diseñado para operar en el espacio, a
Ramón
García López