ON THE SIX-YEAR PERIOD IN THE RADIAL VELOCITY OF ANTARES A

2013/01/10 by Teznie Pugh, David F. Gray · 1 citation
Physics and Astronomy · Engineering · #Stellar, planetary, and galactic studies #History and Developments in Astronomy #Astronomical Observations and Instrumentation

paper · doi:10.1088/0004-6256/145/2/38

openalex publication_date 2013/01/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

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.

Citations

• High resolution spectroscopy for Cepheids distancedetermination
• SHORT TIMESCALE VARIATIONS IN THE ATMOSPHERE OF ANTARES A
• The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog
• The Rotation of Arcturus and Active Longitudes on Giant Stars
• On the orbits of the spectroscopic binaries alpha Orionis and alpha Scorpii.
• The Radial Velocity Variations of a Orionis and a Scorpii
• Validation of the new Hipparcos reduction

Cited by

• Antares [wikipedia]