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Spectroscopic Observations of Obscured Populations in the Inner Galaxy: 2MASS-GC02, Terzan 4, and the 200 km s−1 stellar peak

  • Authors: Andrea Kunder, Riley E. Crabb, Victor P. Debattista, Andreas J. Koch-Hansen, and Brianna M. Huhmann

2021 The Astronomical Journal 162 86.

  • Provider: AAS Journals

Caption: Figure 6.

The Galactocentric velocities of the APOGEE DR16 observations along the plane at negative longitudes along the plane (top) are compared to the APOGEE DR12/DR14 observations at positive longitudes (bottom). For the (l, b) = (−5.8, 0) field, our new AAT observations have been folded in. No strong ∼−200 km s−1 counterfeature to the (l, b) = (5.8, 0) field is apparent. The arrows indicate where the expected high VGSR would be if these stars were part of a kiloparsec-sized nuclear disk. Right: The Galactocentric velocities of the APOGEE observations in off-axis fields and along the plane where there should be no apparent nuclear feature.

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