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A multiphase study of classical Cepheids in the Magellanic Clouds- Models and Observations

Published online by Cambridge University Press:  06 February 2024

Kerdaris Kurbah Open the ORCID record for Kerdaris Kurbah [Opens in a new window] ,
Shashi M. Kanbur ,
Sukanta Deb ,
Susmita Das Open the ORCID record for Susmita Das [Opens in a new window] ,
Mami Deka Open the ORCID record for Mami Deka [Opens in a new window] ,
Anupam Bhardwaj Open the ORCID record for Anupam Bhardwaj [Opens in a new window] ,
Hugh Riley Randal  and
Selim Kalici
Kerdaris Kurbah*
Affiliation:
Department of Physics, Cotton University, Guwahati, Assam, 781001, India
Shashi M. Kanbur
Affiliation:
Department of Physics, State University of New York, Oswego, NY 23126, USA
Sukanta Deb
Affiliation:
Department of Physics, Cotton University, Guwahati, Assam, 781001, India
Susmita Das
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary
Mami Deka
Affiliation:
Department of Physics, Cotton University, Guwahati, Assam, 781001, India
Anupam Bhardwaj
Affiliation:
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, I-801301, Napoli, Italy
Hugh Riley Randal
Affiliation:
Department of Physics, State University of New York, Oswego, NY 23126, USA
Selim Kalici
Affiliation:
Department of Physics, State University of New York, Oswego, NY 23126, USA
*
email: kerdarisbahkur@gmail.com
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Abstract

This work presents the study of multiphase relations of classical Cepheids in the Magellanic Clouds for short periods (log P < 1) and long periods (log P > 1). From the analysis, it has been found that the multiphase relations obtained using the models as well as observations are highly dynamic with pulsational phase. The multiphase relations for short and long periods are found to display contrasting behaviour for both LMC and SMC. It has been observed that the multiphase relations obtained using the models agree better with the observations in the PC plane in most phases in comparison to the PL plane. Multiphase relations obtained using the models display a clear distinction among different convection sets in most phases. Comparison of models and observations in the multiphase plane is one way to test the models with the observations and to constrain the theory of stellar pulsation.

Keywords

starsvariableCepheids-galaxiesMagellanic Clouds-methodsdata analysis-methodsstatistical
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S376: At the crossroads of astrophysics and cosmology: Period–luminosity relations in the 2020s , December 2022 , pp. 267 - 274
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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