Photometric Observations of the η Carinae 2009.0 Spectroscopic Event

Photometric Observations of the η Carinae 2009.0 Spectroscopic Event

We have observed η Carinae over 34 nights between 2009 January 4 and 2009 March 27 covering the estimated timeframe for a predicted spectroscopic event related to a suspected binary system concealed within the homunculus nebula. A photometric minimum feature was confirmed to be periodic and comparis...

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Veröffentlicht in:Publications of the Astronomical Society of Australia 2010, Vol.27 (3), p.374-377
Hauptverfasser: Landes, H., Fitzgerald, M.
Format: Artikel
Sprache:eng
Schlagworte:
binaries
evolution
individual (η Carinae)
stars
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Zusammenfassung:We have observed η Carinae over 34 nights between 2009 January 4 and 2009 March 27 covering the estimated timeframe for a predicted spectroscopic event related to a suspected binary system concealed within the homunculus nebula. A photometric minimum feature was confirmed to be periodic and comparison to a previous event indicated that the period to within our error was 2022.6±1.0 d. Using the E-region standard star system, the apparent V magnitudes determined for the local comparison stars were HD 303308 8.14±0.02, HD 93205 7.77±0.03, and HD 93162 8.22±0.05. The latter star was found to be dimmer than previously reported.
ISSN:1323-3580
1448-6083
DOI:10.1071/AS09036