VizieR Online Data Catalog: RSGs in the LMC & sp. follow-up for LMC & SMC (Neugent+, 2020)

To calculate the binary fraction of the red supergiants (RSGs) in the LMC, we first identified a complete sample of RSGs in the LMC photometrically using 2MASS NIR colors and Gaia to confirm membership. This process is described in Section 2. Table 2 contains the coordinates, 2MASS J and K colors, and derived temperatures and luminosities for the 4090 RSGs in the LMC.

We obtained spectra of 63 candidates in the LMC. Of these, 25 were single RSGs and the remaining 38 were RSG+B binaries. We additionally observed 22 new candidates in the SMC and confirmed 14 as single RSGs and 8 as new RSG+B binaries. Candidate RSG + B-star binaries were observed with the Magellan Echellette instrument on the Baade 6.5m telescope at Las Campanas Observatory over two dedicated observing runs in 2019 and 2020 and an engineering run in 2019. See Section 3.2.

(4 data files).