13. The ‘Berlin’ Nefertiti Bust

Breger, Claudia

doi:10.1515/9781782386278-016

Cited by 1 publication

(2 citation statements)

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“…Therefore, the pulsation modes in δ Scuti stars correspond to specific Q values. According to Breger (1990) and Poro et al (2021), Q can be calculated by…”

Section: Pulsation Modesmentioning

confidence: 99%

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Period–Luminosity Relationship for δ Scuti Stars Revisited

Poro,

Jafarzadeh,

Harzandjadidi

et al. 2024

Res. Astron. Astrophys.

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The Gaia DR3 parallax approach was used to estimate the absolute parameters of 2375 $\delta$ Scuti stars from the ASAS catalog. The selected stars have a variety of observational characteristics, with a higher than 80\% probability of being $\delta$ Scuti stars. We have displayed all the stars in the Hertzsprung-Russell (H-R) diagram along with the $\delta$ Scuti instability strip, the Zero Age Main Sequence (ZAMS), and the Terminal-Age Main Sequence (TAMS). Then, we determined which fundamental and overtone modes each star belongs to using pulsation constant ($Q$) calculations. In addition, we evaluated the parameters in the $Q$ calculation equation using three machine learning methods, which showed that surface gravity and temperature have the greatest effect on its calculation. The Period-Luminosity ($P-L$) relationship of the $\delta$ Scuti stars was also revisited. Eventually, using least squares linear regression, we made four linear fits for fundamental and overtone modes and updated their relationships.

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“…Therefore, the pulsation modes in δ Scuti stars correspond to specific Q values. According to Breger (1990) and Poro et al (2021), Q can be calculated by…”

Section: Pulsation Modesmentioning

confidence: 99%

“…The calculation of the Q value greatly depends on the stellar parameters. Due to this dependence, Q values may have a fractional uncertainty of up to 18% (Breger 1990). The internal structure and evolution of δ Scuti stars can be studied using the Q value, although doing so requires precise measurements and careful interpretation.…”

Section: Pulsation Modesmentioning

confidence: 99%