ARDB 54

Recent analysis of ARDB 54 revealed that it belongs to the (thus far only few) A[e]SGs, being the first of its kind in the LMC [54]. Its position in the near-IR diagram supports this classification, although the object is displaced from the region of classical B[e]SGs in the WISE diagram, where it is located closer to the LBV region. Its luminosity of log *L*/*L* 4.4 [54] is too low to be considered as LBV candidate, and a bit too high to be considered as HAeBe star. From the latter, ARDB 54 is also offset in both color–color diagrams, so that a classification as A[e]SG seems to be the most reasonable, despite its exposed location in the WISE diagram, whose cause should be examined more closely.
