Fourier-transform fits to four helium lines in LAMOST spectra give vsini for 479 Be-type stars, whose deconvolved rotation distribution peaks near 260 km/s with an estimated mean equatorial speed of 0.74 of critical.
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Investigation of projected rotational velocities of Be-type stars in LAMOST DR7
Fourier-transform fits to four helium lines in LAMOST spectra give vsini for 479 Be-type stars, whose deconvolved rotation distribution peaks near 260 km/s with an estimated mean equatorial speed of 0.74 of critical.