Spectroscopic Pulsational Frequency Identification and Mode Determination of {\gamma} Doradus Star HD 12901

TL;DR

This study identifies six pulsation frequencies and their modes in the { extgamma} Doradus star HD 12901 using multi-site spectroscopic data, supporting its use for testing stellar pulsation models.

Contribution

It provides the first detailed spectroscopic frequency and mode identification for HD 12901, highlighting its potential for testing non-radial pulsation theories.

Findings

Six frequencies identified in 1-2 c/d range.

Five frequencies confirmed with mode (l,m)=(1,1).

Star is a prime candidate for pulsation model testing.

Abstract

Using multi-site spectroscopic data collected from three sites, the frequencies and pulsational modes of the {\gamma} Doradus star HD 12901 were identified. A total of six frequencies in the range 1-2 c/d were observed, their identifications supported by multiple line-profile measurement techniques and previously-published photometry. Five frequencies were of sufficient signal-to-noise for mode identification and all five displayed similar three-bump standard deviation profiles which were fitted well with (l,m)=(1,1) modes. These fits had reduced chi-squared values of less than 18. We propose that this star is an excellent candidate to test models of non-radially pulsating {\gamma} Doradus stars as a result of the presence of multiple (1,1) modes.