A New Approach to Find the Böhm-Vitense gap

RAMEZANI, Tahereh, Ernst PAUNZEN, Martin PIECKA and Michal KAJAN. A New Approach to Find the Böhm-Vitense gap. Bulgarian Astronomical Journal. Institute of Astronomy and NAO, 2024, vol. 41, No 2024, p. 3-18. ISSN 1313-2709.

Basic information

• Original name: A New Approach to Find the Böhm-Vitense gap
• Authors: RAMEZANI, Tahereh (364 Islamic Republic of Iran, belonging to the institution), Ernst PAUNZEN (40 Austria, belonging to the institution), Martin PIECKA (703 Slovakia) and Michal KAJAN (703 Slovakia, belonging to the institution).
• Edition: Bulgarian Astronomical Journal, Institute of Astronomy and NAO, 2024, 1313-2709.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10308 Astronomy
• Country of publisher: Bulgaria
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL URL
• Impact factor: Impact factor: 0.400 in 2022
• Organization unit: Faculty of Science
• UT WoS: 001266892300001
• Keywords in English: radiative transfer; convection; Hertzsprung–Russell and colour–magnitude diagrams; open clusters and associations: general
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

This paper discusses the Böhm-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.

Links

• GA23-07605S, research and development project: Name: Osud galaktických otevřených hvězdokup

Investor: Czech Science Foundation, The fate of Galactic open clusters