Fig. 13
Location of TDGs on the BTFR. Vcirc is the circular velocity after correcting for pressure support (Eq. (2)). For star-dominated galaxies (McGaugh 2005) and gas-dominated ones (McGaugh 2012), Vcirc is measured along the flat part of the rotation curve. For TDGs, the shape of the rotation curve is uncertain, thus Vcirc may not correspond to the velocity along its flat part.
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