| Issue |
A&A
Volume 691, November 2024
|
|
|---|---|---|
| Article Number | L4 | |
| Number of page(s) | 6 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/202452215 | |
| Published online | 29 October 2024 | |
Letter to the Editor
The persistent Be enigma: The case of HD 212044
1
Observatório Nacional, MCTI, 20921-400 Rio de Janeiro, RJ, Brazil
2
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, 05509-090 São Paulo, SP, Brazil
3
Laboratório Nacional de Astrofísica, Rua Estados Unidos 154, 37504-364 Itajubá, MG, Brazil
4
Universidade Estadual de Ponta Grossa, 84030-900 Ponta Grossa, PR, Brazil
⋆ Corresponding author; alanwpereira@gmail.com
Received:
12
September 2024
Accepted:
3
October 2024
We present an analysis of the Be star HD 212044 that reveals intriguing correlations between photometric variations, circumstellar disk emission, and frequencies. Our findings, based on data from the Transiting Exoplanet Survey Satellite (TESS) mission, show an unexpectedly strong negative correlation between photometric brightness and Hα equivalent width, challenging the established understanding of the behavior of Be star seen at low inclination angles. Notably, beating episodes precede brightening events. This study suggests that the variability of HD 212044 may be due to additional mechanisms.
Key words: stars: emission-line, Be / stars: mass-loss / stars: oscillations
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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