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Asteroseismology of the a number of stellar populations within the globular cluster M4


Vol. 662
1. Letters to the Editor

Asteroseismology of the a number of stellar populations within the globular cluster M4

by M. Tailo, E. Corsaro, A. Miglio, J. Montalbán, Okay. Brogaard, A. P. Milone, A. Stokholm, G. Casali, A. Bragaglia 2022, A&A, 662, L7

The detection of solar-like oscillations in stellar clusters has an infinite potential, though it’s a difficult job, notably for globular clusters which can be far-off and affected by crowding. Among the many previous Galactic globular clusters, solely M4 is at the moment accessible to this sort of analysis. The authors have taken benefit of observations with the NASA Kepler satellite tv for pc to detect oscillations with an influence extra in 37 cluster members, the biggest pattern of solar-like oscillators in a globular cluster thus far, which incorporates each pink large department and pink horizontal department stars.

For the primary time, an asteroseismic characterization of the a number of stellar populations hosted on this cluster has been potential; the lots and radii estimated for these stars are in excellent settlement with the values obtained with extra classical strategies, and the authors verify that the distinction in mass amongst stars belonging to the cluster a number of populations is kind of small. Furthermore, the characterization of an excellent variety of pink horizontal department stars has offered strong affirmation that these objects lose a reasonably excessive quantity of mass, and that stellar mass loss in globular clusters appears to be a distinct phenomenon in comparison with that in youthful stellar associations.

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