Nonthermal Properties of Supernova Remnant G1.9+0.3

The properties of the-presumably-youngest Galactic supernova remnant (SNR) G1.9+0.3 are investigated within the framework of nonlinear kinetic theory of cosmic ray acceleration in SNRs. The observed angular size and expansion speed as well as the radio and X-ray emission measurements are used to determine relevant physical parameters of this SNR. Under the assumption that SNR G1.9+0.3 is the result of a Type Ia supernova near the Galactic center (at the distance d = 8.5 kpc), the nonthermal properties are calculated. In particular, the expected TeV gamma-ray spectral energy density is predicted to be as low as {epsilon}{sub {gamma}} F{sub {gamma} {approx}} 5 x 10{sup -15} erg cm{sup -2} s{sup -1}, strongly dependent (F{sub {gamma} {proportional_to}} d {sup -11}) upon the source distance d.