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Motivated by the challenges of calculating the dynamical masses of late-typegalaxies (LTGs) and the enormous amount of data from the Sloan Digital SkySurvey (SDSS), we calculate virial masses of a sample of approximately 126,000LTGs from the sixteenth data release of the SDSS. The virial mass estimationswere made considering Newtonian mechanics, virial equilibrium and velocitydispersion from stars and gas. The procedure gave as a result seven massestimations for each galaxy. The calculated masses were calibrated using asample of spiral galaxies with velocity rotation curves. Considering theresults from the calibration, we find that the correlation between virial anddynamical (rotation curve) masses is stronger for high inclination values.Therefore the calibration relies more on the available data for higherinclination angle galaxies. We also show that if we have a heterogeneous sampleof galaxies one must take into consideration the size and colour of thesegalaxies by using the following variables: Sersic index n, concentration indexand colour of the stars. For relatively smaller and bluer LTGs the gas velocitydispersion provides a more consistent mass calculation, while for LTGs that arerelatively larger and redder the stellar velocity dispersion provides a bettercorrelated mass calculation.

Virial masses of late type galaxies from the SDSS DR16