Three new Beta Cephei stars detected

phys.org | 8/7/2019 | Staff
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Top: K2 light curve of CD-28 12286 with the brightness variations in mmag. Bottom: LS-periodograms and frequencies identified by pre-whitening. Image credit: Burssens et al., 2019.

Using NASA's prolonged Kepler mission, known as K2, astronomers have identified three new Beta Cephei stars. The newly found trio is an important addition to the still short list of known stars of this type. The finding is detailed in a paper published August 7 on the arXiv pre-print server.

Beta - Cephei - β - Cep - Stars

Beta Cephei (β Cep) stars are massive, non-supergiant variable stars with spectral type O or B, exhibiting variations in photometric, radial velocity and line profile due to low-order pressure and gravity mode pulsations. Observations revealed that most stars of this class are of early B-type with masses ranging from 8.0 to 17 solar masses, characterized by their relatively high-frequency pulsations (typically between two to seven hours).

Studies of Beta Cepheids could help astronomers better understand the interiors of massive stars. One of the best methods to investigate this class of objects is asteroseismology. This technique provides a powerful way to study both the global and local physics of such objects. However, given that the list of known Beta Cepheids is still relatively short, any new detection of a star of this type is of high importance for researchers.

Team - Astronomers - Siemen - Burssens - Catholic

Now, a team of astronomers led by Siemen Burssens of Catholic University of Leuven (KU Leuven), reports the finding of three new Beta Cepheids. The discovery was made by analyzing the data from K2 exoplanet-hunting mission....
(Excerpt) Read more at: phys.org
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