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Photometric Observations of the η Carinae 2009.0 Spectroscopic Event

Published online by Cambridge University Press:  02 January 2013

H. Landes  and
M. Fitzgerald
H. Landes*
Affiliation:
School of Physics, Monash University, VIC 3800, Australia
M. Fitzgerald
Affiliation:
School of Physics, Monash University, VIC 3800, Australia
*
BCorresponding author. Email: herschel.landes@sci.monash.edu.au
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Abstract

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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.

Keywords

binaries: generalstars: individual (η Carinae)stars: evolution
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 27 , Issue 3 , 2010 , pp. 374 - 377
Copyright
Copyright © Astronomical Society of Australia 2010

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