Work

Ground- and space-based investigation of the intermediate-age open star cluster NGC 2126

Year: 2024

Type: article

Abstract: We performed ground-based, time-series observations of the intermediate-age open cluster NGC 2126 with the 1.3-meter Devasthal Fast Optical Telescope (ARIES) and discovered 112 variable stars in an 18 x 18 arcmin field. Among these, 11 stars were known variables, for which we performed TESS full-frame image photometry in three different sectors. There were 17 new member variables and 84 variable field stars. The eclipsing binary V551 Aur is a member of NGC 2126 with high probability and has a pulsating component. This star was studied in detail by means of a medium-resolution spectrum and TESS photometry. The light curve was analyzed using a binary model, which was then removed to investigate the pulsational variability. The new variable members were classified based on their position in the HR diagram, shape of the phase-folded light curves, period and amplitude of variability. We also modeled the light curves of other binary stars in the field to determine their orbital parameters.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.13667683

Authors: Dileep, Athul, Joshi, Santosh, Lata, Sneh, Lampens, Patricia, Zúñiga Fernández, Sebastián, De Cat, Peter, Mkrtichian, David

Institutions: M.J.P. Rohilkhand University, Aryabhatta Research Institute of Observational Sciences, Royal Observatory of Belgium, University of Liège, National Astronomical Research Institute of Thailand

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W6967976752

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