Periodic low-amplitude variations in the brightness of Proxima Centauri

Details Periodic low-amplitude variations in the brightness of Proxima Centauri Periodic low-amplitude variations in the brightness of Proxima Centauri

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..487b&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 687, p. 487-493.

Astronomy and Astrophysics

Astronomy

14

Flare Stars, Light Curve, Periodic Variations, Variable Stars, Astronomical Photometry, Centaurus Constellation, Hubble Space Telescope, Photosphere, Starspots, Stellar Flares, Stellar Magnitude, Stellar Rotation

Scientific paper

Using data acquired with Fine Guidance Sensor No. 3 on board the Hubble Space Telescope we find that the brightness of Proxima Centauri varies with an amplitude of 0.01 mag and a period P = 41.6 +/- 0.6 days. We interpret this variation as rotational modulation of star spots or bright regions in the photosphere of Proxima Cen. In a total of 89.36 min of monitoring over 212 days, we detected one major flare and three post-flare brightenings.

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