EPJ Web Conf.
Volume 152, 2017Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|Number of page(s)||2|
|Section||The spectroscopic perspective|
|Published online||08 September 2017|
Photometric and spectroscopic variability of the B5IIIe star HD171219
1 Universidade Estadual de Ponta Grossa, Av. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa, Brazil
2 Universidade de São Paulo/IAG, rua do Matão, 1226 - Cidade Universitária, 05508-900, São Paulo, Brazil
3 Royal Observatory of Belgium, 3 avenue circulaire, B1180 Brussels, Belgium
Published online: 8 September 2017
We analyzed the Be star HD171219, observed with the CoRoT satellite during a 77.56 day run, in order to determine its physical and pulsation characteristics. Highresolution ground-based spectroscopic observations with HARPS and SOPHIE were also obtained during the month preceding the CoRoT observations. Twenty frequencies have been detected in the object, some of them compatible with non-radial g-modes, including a quintuplet centered around 1.113 c/d (12.88 μHz) identified as a pulsation of degree ℓ ∼ 2. The star underwent at least 6 small outbursts during the CoRoT observations. The relative intensity of the main frequencies varied after each outburst suggesting that the stability of the star and the feeding of the envelope are linked to the pulsation regime ().
© The Authors, published by EDP Sciences, 2017
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