SIMBAD references

2013AJ....145...38P - Astron. J., 145, 38 (2013/February-0)

On the six-year period in the radial velocity of Antares A.


Abstract (from CDS):

We examine the century-long historical data and compare it with our new radial-velocity measurements to determine an improved period. We find a period of 2167±5 days (5.93±0.01 years). Both orbital motion and pulsation are considered as possible causes of the velocity variation. Temperature variations we deduce from line-depth ratios support the pulsation hypothesis. A temperature minimum occurs in 2009, 70 days after the radial-velocity minimum. We deduce a radius change of 19%±4% from an integration of the radial-velocity curve and predict a visual magnitude variation ∼0.2 from the radius and temperature variation.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - stars: individual: α Sco A - stars: oscillations, including pulsations - stars: variables: general - techniques: radial velocities - techniques: spectroscopic

Simbad objects: 5

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