Astronomers have found almost 300 variable stars and figured out where they come from

Using data from NASA's Kepler space telescope, astronomers from the Pedagogical University of Krakow

Poland and other countries have discovered almost 300 variable stars in the open cluster NGC 6791 and its surroundings. Of these, 119 were newly discovered variables.

In total, the team identified 278 variablesstars, of which 119 were newly discovered variables. Among the entire sample, 17 binaries, 45 pulsators, and five unclassified ones were found to be members of NGC 6791. The remaining 28 binaries, 25 pulsators, and four unclassified and nine unidentified variables are either not members of the cluster or their membership has not yet been determined.

The charts show that mostThe identified variable stars in NGC 6791 are located on the main sequence. Also, according to the study, the metallicity among the identified cluster member variables is not the same. Astronomers speculate that this is due to the presence of multiple stellar populations within NGC 6791. However, a uniform spectroscopic study is needed to confirm.

Based on newly collected data, researchersIt was possible to derive fundamental parameters for NGC 6791. The results show that the cluster is 8.9 billion years old, has a metallicity of 0.26–0.28, and is located at a distance of about 13,500 light years.

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Cover photo: ESO/VVV consortium/D. Minniti