MOST observations of the Herbig Ae {\delta}-Scuti star HD 34282

TL;DR

This study uses MOST satellite observations to analyze the pulsation frequencies of the Herbig Ae star HD 34282, identifying new frequencies and confirming previous ones, and modeling the star's pulsations to understand its internal structure.

Contribution

It provides new observational data on HD 34282's pulsation frequencies and links these to stellar models, extending understanding of Herbig Ae star pulsations.

Findings

22 frequencies observed, including 12 new discoveries

Pulsation spectrum extends to the acoustic cut-off frequency

Model analysis confirms radial p-mode frequencies

Abstract

MOST observations and model analysis of the Herbig Ae star HD 34282 (V1366 Ori) reveal {\delta}-Scuti pulsations. 22 frequencies are observed, 10 of which confirm those previously identified by Amado et al. (2006), and 12 of which are newly discovered in this work. We show that the weighted-average frequency in each group fits the radial p-mode frequencies of viable models. We argue that the observed pulsation spectrum extends just to the edge to the acoustic cut-off frequency and show that this also is consistent with our best-fitting models.