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    • Mehner, A.; Davidson, K.; Humphreys, R. M.; Walter, F. M.; Baade, D.; Wit, W. J. de; Martin, J.; Ishibashi, K.; Rivinius, T.; Martayan, C.; Ruiz González, María Teresa; Weis, K. (ESO, 2015)
      Aims. Every 5.5 years, eta Car's light curve and spectrum change remarkably across all observed wavelength bands. These so-called spectroscopic events are most likely caused by the close approach of a companion. We compare ...