| Title: |
Improved period estimates of RR Lyrae stars using multitapering and the F-test |
| Authors: |
Su, Jianing; Eadie, Gwendolyn; Patil, Aarya; Springford, Aaron |
| Contributors: |
Campante, Tiago L. |
| Publisher Information: |
Zenodo |
| Publication Year: |
2024 |
| Collection: |
Zenodo |
| Description: |
Obtaining period estimates of RR Lyrae variables often requires a multi-step process (e.g., Lomb-Scargle periodogram followed by refinement steps to converge on the best estimate of the period). We have discovered a new technique to acquire accurate pulsation frequencies for RR Lyrae stars in a more efficient and reliable way. The method uses mtNUFFT, an extension of the Thomson multitaper power spectrum estimator to quasi-even time-sampling, along with the F variance ratio test, to estimate the periods. We introduce this approach and demonstrate its effectiveness on a sample of 44 RR Lyrae stars from TESS. Overall, the F variance ratio test outperforms the Lomb-Scargle periodogram in both accuracy and computational efficiency. In particular, we see obvious improvements on period estimates in the phase-folded light curves of the RR Lyrae stars compared to literature values. The software for our new approach is available in an open-source software package, which should be useful not only for RR Lyrae variables, but also for other studies of stellar pulsations. |
| Document Type: |
text |
| Language: |
unknown |
| Relation: |
arXiv:2209.15027; arXiv:2405.18509; https://zenodo.org/communities/tasc8-kasc15/; https://zenodo.org/records/14187199; oai:zenodo.org:14187199; https://doi.org/10.5281/zenodo.14187199 |
| DOI: |
10.5281/zenodo.14187199 |
| Availability: |
https://doi.org/10.5281/zenodo.14187199; https://zenodo.org/records/14187199 |
| Rights: |
Creative Commons Attribution 4.0 International ; cc-by-4.0 ; https://creativecommons.org/licenses/by/4.0/legalcode |
| Accession Number: |
edsbas.6EB46240 |
| Database: |
BASE |