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Mrinal Kanti Das, Naveen Kumar Bhatraju & Santosh Joshi

Analysis of HD 73045 light curve data

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Open Access

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Mots-clés : astronomie, astrophysique, étoiles, photométrie, variabilité

Abstract

In this work we analyzed the Kepler light curve data of HD 73045. The raw data has been smoothened using standard filters. The power spectrum has been obtained by using a fast Fourier transform routine. It shows the presence of more than one period. In order to take care of any non-stationary behavior, we carried out a wavelet analysis to obtain the wavelet power spectrum. In addition, to identify the scale invariant structure, the data has been analyzed using a multifractal detrended fluctuation analysis. Further to characterize the diversity of embedded patterns in the HD 73045 flux time series, we computed various entropy-based complexity measures e.g. sample entropy, spectral entropy and permutation entropy. The presence of periodic structure in the time series was further analyzed using the visibility network and horizontal visibility network model of the time series. The degree distributions in the two network models confirm such structures.

Keywords : astronomy, astrophysics, photometry, stars, variability

Para citar este artículo

Mrinal Kanti Das, Naveen Kumar Bhatraju & Santosh Joshi, «Analysis of HD 73045 light curve data», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 158 - 162 URL : https://popups.uliege.be:443/0037-9565/index.php?id=7616.

Acerca de: Mrinal Kanti Das

Institute of Informatics and Communication, University of Delhi South Campus, New Delhi, India, dasmkd11@gmail.com

Acerca de: Naveen Kumar Bhatraju

CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi 110007, India

Acerca de: Santosh Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India