Fig. 23
Same as Fig. 19 for B335. Top: H13CO+ (J = 1–0) line observed at Nobeyama (2″ ring width). Bottom: 13CO (J = 2–1) line observed with ALMA (0.′′1 ring width; 
, red line and symbols; μ1, black line and symbols; 
, blue line and symbols) The dashed lines in the top and bottom panels show the best simultaneous fit to the Nobeyama moment μ1 (beamwidth 5.′′0), and the ALMA moments 
and 
(beamwidth 0.′′31). The best fit is obtained for an infinite infall radius, a systemic velocity V sys = 8.29 km s−1, and a centralmass of 0.09 M⊙. The black dotted line in the bottom panel is not a fit, but the value of μ1 predicted by the best-fit model for the ALMA first-order moment.
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