Catherine Zucker edited figures/Candid1_pos_vel/caption.tex  about 9 years ago

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\textit{Top}: Position-velocity diagram of CO, NH$_{3}$, and HCO$^+$ emission for filament 1. Blue background shows $^{12}$CO (1-0) emission integrated between $-1 < \textrm{b} < 1$ degrees \citep{Dame_2001}. Black dots show GRS sources associated with BC\_26.94-0.30. The black lines are fits to CO data for the Scutum-Centaurus arm, from \citet{Dame_2001} and \citet{Shane_1972}.\textit{Bottom}: Plane of the sky map integrated between 55-75 km/s, the approximate velocity range of the Scutum-Centaurus arm in the region around BC\_26.94-0.30. A trace of BC\_26.94-0.30, as it would appear as a mid-IR extinction feature, is superimposed on the CO emission map. The correlation between BC\_26.94-0.30's mid-IR extinction feature and the Scutum-Centaurus's arm most intense CO emission hints that BC\_26.94-0.30 may be a spine of Scutum as traced by lower density CO gas