SIMBAD references

2023MNRAS.519.5882S - Mon. Not. R. Astron. Soc., 519, 5882-5892 (2023/March-2)

The orbital kinematics of η Carinae over three periastra with a possible detection of the elusive secondary's motion.

STRAWN E., RICHARDSON N.D., MOFFAT A.F.J., IBRAHIM N., LANE A., PICKETT C., CHENE A.-N., CORCORAN M.F., DAMINELI A., GULL T.R., HILLIER D.J., MORRIS P., PABLO H., THOMAS J.D., STEVENS I.R., TEODORO M. and WEIGELT G.

Abstract (from CDS):

The binary η Carinae is the closest example of a very massive star, which may have formed through a merger during its Great Eruption in the mid-19th century. We aimed to confirm and improve the kinematics using a spectroscopic data set taken with the Cerro Tololo Inter-American Observatory 1.5-m telescope over the time period of 2008-2020, covering three periastron passages of the highly eccentric orbit. We measure line variability of H α and H β, where the radial velocity and orbital kinematics of the primary star were measured from the H β emission line using a bisector method. At phases away from periastron, we observed the He II 4686 emission moving opposite the primary star, consistent with a possible Wolf-Rayet companion, although with a seemingly narrow emission line. This could represent the first detection of emission from the companion.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: spectroscopic - binaries: spectroscopic - stars: individual: η Carinae - stars: massive - stars: variables: S Doradus - stars: winds, outflows

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 18

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2023MNRAS.519.5882S and select 'bookmark this link' or equivalent in the popup menu