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2008MNRAS.384.1649D - Mon. Not. R. Astron. Soc., 384, 1649-1656 (2008/March-2)
The periodicity of the η Carinae events.
DAMINELI A., HILLIER D.J., CORCORAN M.F., STAHL O., LEVENHAGEN R.S., LEISTER N.V., GROH J.H., TEODORO M., ALBACETE COLOMBO J.F., GONZALEZ F., ARIAS J., LEVATO H., GROSSO M., MORRELL N., GAMEN R., WALLERSTEIN G. and NIEMELA V.
Abstract (from CDS):
Spectroscopic data collected during the last 60 yr yield an average period of Pavg= 2020±4 d, consistent with the present-day period. The period cannot have changed by more than ΔP/P = 0.0007 since 1948. This confirms the previous claims of a true, stable periodicity, and gives strong support to the binary scenario. We have used the disappearance of the narrow component of Hei 6678 to define the epoch of the Cycle 11 minimum, T0= JD2452819.8. The next event is predicted to occur on 2009 January 11 (±2 d). The dates for the start of the minimum in other spectral features and broad-bands are very close to this date, and have well-determined time-delays from the Hei epoch.
Abstract Copyright: 2008 The Authors. Journal compilation © 2008 RAS
Journal keyword(s): stars: general - stars: individual: eta Carinae - stars: binary
Simbad objects: 6
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