Dandav Posted December 15, 2022 Author Report Share Posted December 15, 2022 (edited) Let's summarize the key functionality of the Bar. 1. The Bar had been formed by tidal gravity force of the ring/spiral arms on the Bulge. 2. Due to that tidal force matter and stars from the Bulge had been pushed outwards into the two symmetrical arms that formed the bar. We can clearly see the direction of the tidal forces on the spherical bulge: 3. All the matter/stars in the Bar had been ejected outwards from the Bulge. It would never come back as long as the tidal force continue to work. 4. Therefore the Bar acts as an output funnel that transfer matter and stars from the bulge into the Ring and Spiral arms. Hence, The Bar is a key element in the transformation from a spherical bulge shape into a disc ring & spiral arms. 5. We should consider the Bulge + Bar as one object that should be called Bar shape Bulge. Edited December 16, 2022 by Dandav Quote Link to comment Share on other sites More sharing options...
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