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Title: SHORT TIMESCALE VARIATIONS IN THE ATMOSPHERE OF ANTARES A

We analyze three years of high-resolution spectroscopic data and find radial velocity variations with a characteristic timescale of 100 ± 6 days that are nearly sinusoidal. Simultaneous variations in line-depth ratios imply temperature variations of up to 100 K. No photometric variation is seen on a 100 day timescale. The timescale of the variation and its resonant nature suggest solar-like oscillations driven by large-scale convection.
Authors:
;  [1]
  1. Department of Physics and Astronomy, Western University, London, ON (Canada)
Publication Date:
OSTI Identifier:
22270693
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 777; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; CONVECTION; OSCILLATIONS; PHOTOMETRY; RADIAL VELOCITY; RESOLUTION; STARS; VARIATIONS