Searching for solar-like oscillations in pre-main sequence stars using APOLLO

Abstract

In recent years, our understanding of solar-like oscillations from main sequence to red giant stars has improved dramatically thanks to pristine data collected from space telescopes. One of the remaining open questions focuses around the observational identification of solar-like oscillations in pre-main sequence stars. We aim to develop an improved method to search for solar-like oscillations in pre-main sequence stars and apply it to data collected by the Kepler K2 mission. Our software APOLLO includes a novel way to detect low signal-to-noise ratio solar like oscillations in the presence of a high background level. By calibrating our method using known solar-like oscillators from the main Kepler mission, we apply it to T Tauri stars observed by Kepler K2 and identify several candidate pre-main sequence solar-like oscillators. We find that our method is robust even when applied to time-series of observational lengths as short as those obtained with the TESS satellite in one sector. We identify EPIC 205375290 as a possible candidate for solar-like oscillations in a pre-main sequence star with ${\nu }_{\max }\simeq 242\mu$Hz. We also derive EPIC 205375290's fundamental parameters to be $T_{\mathrm{eff}}$ = 3670$\pm$180 K, log $g$ = 3.85$\pm$0.3, $v$sin$i$ = 8 $\pm$ 1 km s${}^{-1}$, and about solar metallicity from a high-resolution spectrum obtained from the Keck archive.

14 pages, 13 figures

References in corpus (20)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• The K2 Mission: Characterization and Early results
• The APOKASC Catalog: An Asteroseismic and Spectroscopic Joint Survey of Targets in the Kepler Fields
• The connection between stellar granulation and oscillation as seen by the Kepler mission
• Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters
• EVEREST: Pixel Level Decorrelation of K2 Light curves
• Empirical, Accurate Masses and Radii of Single Stars with TESS and Gaia
• Asteroseismology of solar-type stars
• The asteroseismic potential of TESS: exoplanet-host stars
• Efficient Bayesian inference for multimodal problems in cosmology
• DIAMONDS: a new Bayesian Nested Sampling tool. Application to Peak Bagging of solar-like oscillations
• Automated preparation of Kepler time series of planet hosts for asteroseismic analysis
• Oscillating K giants with the WIRE satellite: determination of their asteroseismic masses
• The Asteroseismic Target List (ATL) for solar-like oscillators observed in 2-minute cadence with the Transiting Exoplanet Survey Satellite (TESS)
• Metallicity effect on stellar granulation detected from oscillating red giants in open clusters
• Asteroseismic stellar activity relations
• FliPer${}_{Class}$: In search of solar-like pulsators among TESS targets
• Non-LTE Modelling of the Structure and Spectra of the Hot Accretion Spots on the Surface of Young Stars
• Seismic evolution of low/intermediate mass PMS stars

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• The Flare-Activity of 2MASSJ16111534-1757214 in the Upper Scorpius association