A New Approach to Find the Bohm-Vitense gap

Autor(en)

Tahereh Ramezani, Ernst Paunzen, Martin Piecka, Michal Kajan

Abstrakt

This paper discusses the Bohm-Vitense gap, a gap in the colours of stars that occurs when the atmosphere changes from radiative to convective in deep layers. We are using different algorithms for detecting gaps in colour-magnitude diagrams (CMDs), including the k-nearest neighbours (k-NN) and UniDip algorithms. We propose using a combination of the k-NN algorithm and the UniDip algorithm and manual verification to identify gaps unlikely to be of a statistical origin. Using the Gaia photometric system, i.e. BP - RP, we took the data of 130 star clusters and searched for gaps in the ranges of 0.40 to 0.47 mag, and 0.56 to 0.60 mag, respectively. We analysed all data statistically and identified the gaps in the individual clusters. Finally, we applied the kernel density estimator to see how the gaps are distributed.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Masaryk University

Journal

Bulgarian Astronomical Journal

Band

41

Anzahl der Seiten

16

ISSN

1313-2709

Publikationsdatum

07-2024

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/958cb0e4-e8ff-4da7-8e17-7bfae961226e