Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...303..872c&link_type=abstract
Astronomy and Astrophysics, v.303, p.872
Astronomy and Astrophysics
Astrophysics
10
Ism: Supernova Remnants, Clouds, Radio Continuum: Ism, Gamma Rays: Observations
Scientific paper
We report and discuss results of 1435MHz observations of the continuum emission from the Ara region. Using data from the previous 408MHz all-sky survey by Haslam et al. (1981) we have computed the spectral index distribution in the region. After the subtraction of a background component, several interesting features can be observed at both frequencies. We pay particular attention to an extended nonthermal source which is coincident with a strong γ-ray emission zone at 10deg from the galactic plane. We suggest that this feature could be the result of the interaction of a supernova remnant (SNR) with an interstellar cloud. Our interpretation can explain both the nonthermal nature of the radio source as well as the enhancement in the γ-ray flux. Several parameters are estimated for this context and other possible interpretations are briefly discussed.
Combi Jorge Ariel
Romero Gustavo E.
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