INVESTIGADORES
ROMERO Gustavo Esteban
artículos
Título:
Are T Tauri stars gamma-ray emitters?
Autor/es:
DEL VALLE, M. V.; ROMERO, G. E.; LUQUE-ESCAMILLA, L. P.; MARTÍ, J; SÁNCHEZ-SUTIL, J.R.
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2011 vol. 738 p. 115 - 118
ISSN:
0004-637X
Resumen:
T Tauri stars are young, low-mass, pre-main-sequence stars surrounded by an accretion disk. These objects present
strong magnetic activity and powerful magnetic reconnection events. Strong shocks are likely associated with fast
reconnection in the stellar magnetosphere. Such shocks can accelerate particles up to relativistic energies. We aim
at developing a simple model to calculate the radiation produced by non-thermal relativistic particles in the
environment of T Tauri stars. We want to establish whether this emission is detectable at high energies with
the available or forthcoming γ -ray telescopes. We assume that particles (protons and electrons) pre-accelerated
in reconnection events are accelerated at shocks through the Fermi mechanism and we study the high-energy
emission produced by the dominant radiative processes. We calculate the spectral energy distribution of T Tauri
stars up to high energies and we compare the integrated flux obtained with that from a specific Fermi source,
1FGL J1625.8−2429c, that we tentatively associate with this kind of young stellar object. We suggest that under
reasonable general conditions nearby T Tauri stars might be detected at high energies and be responsible for some
unidentified Fermi sources on the Galactic plane.