Adaptive optical feedforward linearization of optical transceiver for radio over fiber communication link by Neo, Yun Sheng

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The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M-circle dot stellar mass limit by Crowther, P.A., Schnurr, O., Hirschi, R., Yusof, N., Parker, R.J., Goodwin, S.P., Abu Kassim, H.

“…Spectroscopic analyses of hydrogen-rich WN 5-6 stars within the young star clusters NGC 3603 and R136 are presented, using archival Hubble Space Telescope and Very Large Telescope spectroscopy, and high spatial resolution near-IR photometry, including Multi-Conjugate Adaptive Optics Demonstrator (MAD) imaging of R136. We derive high stellar temperatures for the WN stars in NGC 3603 (T-* similar to 42 +/- 2 kK) and R136 (T-* similar to 53 +/- 3 kK) plus clumping-corrected mass-loss rates of 2-5 x 10(-5) M-circle dot yr(-1) which closely agree with theoretical predictions from Vink et al. …”