What question did this study set out to answer?

Assess the capability of sparse Gaia Data Release 3 photometric time series to identify intermediate- to high-mass main-sequence pulsators, map empirical instability strips, and validate period-luminosity and rotation relationships.

June 10, 2022Astronomy and AstrophysicsOpen Access

GaiaData Release 3

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Authors

JRJ. De RidderInstitute of Astronomy VRV. RipepiAstronomical Observatory of Capodimonte CAC. AertsRadboud University Nijmegen

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Implication

Observational survey reveals broader stellar instability strips and rotation-damped pulsations in massive stars, demonstrating the utility of sparse all-sky photometry.

Key Points

Assess the capability of sparse Gaia Data Release 3 photometric time series to identify intermediate- to high-mass main-sequence pulsators, map empirical instability strips, and validate period-luminosity and rotation relationships.
Conducted Fourier analysis on 34-month Gaia DR3 photometric time series across O-, B-, A-, and F-type stars (mass >= 1.3 solar masses).
Obtained stellar astrophysical parameters from Gaia DR3 gspphot tables and projected rotational velocities (v sin i) from esphs catalogs.
Constructed period-luminosity relations for Delta Scuti stars using the Gaia photometric parallax method.
Accurately placed OBAF-type pulsators on the Hertzsprung-Russell diagram, revealing that empirical instability strips are wider than theoretical predictions and include fast-rotating gravity-mode pulsators outside predicted boundaries.
Established an empirical period-luminosity relation for Delta Scuti stars exhibiting distinct regimes based on oscillation period.
Demonstrated that increasing stellar rotational velocity significantly suppresses the dominant pulsation amplitude, while detecting dominant oscillation modes in approximately 100,000 stars across the sky.

Cite This Study

Ridder et al. (2022) studied this question.

synapsesocial.com/papers/6a1bc2e226cb5670aa9cd303 https://doi.org/10.1051/0004-6361/202243767

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Implication

Observational survey reveals broader stellar instability strips and rotation-damped pulsations in massive stars, demonstrating the utility of sparse all-sky photometry.

GaiaData Release 3

Discussion

Member takes

Implication

Key Points

Cite This Study

GaiaData Release 3

Discussion

Member takes

Implication

Key Points

Cite This Study

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