IR Star Counts in the Inner Disc
New small-scale JH star counts are presented for 4 regions on the plane between l=31° and l=15°.The colourmagnitude diagrams clearly show that there is a major giant branch at l=27° which is not present at l=31°. The distance to this feature is about 7.5 kpc with a total extinction of A V =7 mag. This giant branch is also seen at l=21° and l=15° and is consistent with there being a major bar at an angle of about 75° to the line of sight. At l=31° only features attributable to the disc can be seen and show that the extinction within the molecular ring is significantly higher than along the rest of the line of sight.
KeywordsGalactic Plane Tangential Point Young Star Galactocentric Distance Total Extinction
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