Summary
We show how combined large-beam infra-red and radio observations toward the Virgo Cluster may be explained by assuming the existence of a large tepid halo surrounding the giant galaxy M87. Such a halo would be able to close the cluster gravitationally. If interpreted as being due to bremmstrahlung radiation by a tepid extended halo, it also explains the infra-red observations, and it has important implications for the physics of M87.
Riassunto
Si mostra come, unendo osservazioni infrarosse e radio, il segnale dal Virgo Cluster si possa spiegare con l'esistenza di un alone «tiepido» ed esteso che circonda M87. Un tale alone potrebbe chiudere gravitazionalmente il cluster.
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Ceccarelli, C., De Bernardis, P., Masi, S. et al. Large-beam radio and infra-red observations toward the Virgo Cluster. Il Nuovo Cimento C 8, 374–378 (1985). https://doi.org/10.1007/BF02507447
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DOI: https://doi.org/10.1007/BF02507447