Eta Carinae: Binarity Confirmed

Details Eta Carinae: Binarity Confirmed Eta Carinae: Binarity Confirmed

1999-12-17

arxiv.org/abs/astro-ph/9912387v1

Astronomy and Astrophysics

Astrophysics

13 pages, accepted by ApJ Letters (January 2000)

Scientific paper

10.1086/312441

We report the recovery of a spectroscopic event in eta Carinae in 1997/98 after a prediction by Damineli (1996). A true periodicity with P = 2020+-5 days (0.2% uncertainty) is obtained. The line intensities and the radial-velocity curve display a phase-locked behavior implying that the energy and dynamics of the event repeat from cycle to cycle. This rules out S Doradus oscillation or multiple shell ejection by an unstable star as the explanation of the spectroscopic events. A colliding-wind binary scenario is supported by our spectroscopic data and by X-ray observations. Although deviations from a simple case exist around periastron, intensive monitoring during the next event (mid 2003) will be crucial to the understanding of the system.

Affiliated with

Also associated with

No associations

Rating

Eta Carinae: Binarity Confirmed does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Eta Carinae: Binarity Confirmed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eta Carinae: Binarity Confirmed will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-244596