Work

Fitting surface-independent phase shift differences

Year: 2024

Type: article

Abstract: With the great inference power asteroseismology brings to model fitting of stars, one of the greatest challenges is the asteroseismic surface effect. While it has previously been circumvented using combinations of individual frequencies, most often the frequency separation ratios, they are derived using several approximations, which decreases the precision of the inferred parameters. Here, we present the epsilon differences method, which relies on how specific combinations of individual frequencies cancel out the contribution from the surface, derived using less approximations than frequency separation ratios, and show how it performs in comparison to the established methods.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.13270426

Authors: Winther, Mark Lykke, Rørsted, Jakob Lysgaard, Roxburgh, Ian, Verma, Kuldeep, Cunha, Margarida S., Stokholm, Amalie

Institutions: Aarhus University, Queen Mary University of London, Indian Institute of Technology BHU, Centro de Astrofísica da Universidade do Porto, University of Birmingham

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: W6911848569

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