Buoyancy glitches in pulsating stars revisited | Astronomy & Astrophysics (A&A)

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Volume 687 (July 2024)

A&A, 687 (2024) A100

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Table 2.

Parameters derived from the fit of the analytical expression for the Gaussian-like glitch (Eqs. (10) and (22)) to the period spacing derived from ASTER for the RGB model.

	P_s, min	ΔP_as (s)	A_G (10⁻⁶ rad/s)	$ω_{g}^{⋆}$ $\omega_{\rm g}^\star$ (10⁻⁶ rad/s)	Δ_g (10⁻⁶ rad/s)	δ	Reference
Periods’ fit	$14 967 . 183_{- 0.074}^{+ 0.076}$ $14\,967.183^{ +0.076}_{-0.074}$	$67 . 53443_{- 0.00035}^{+ 0.00034}$ $67.53443^{ +0.00034}_{-0.00035}$	$589 . 1_{- 4.3}^{+ 4.4}$ $589.1^{ +4.4}_{-4.3}$	$1730 . 6_{- 1.6}^{+ 1.6}$ $1730.6^{ +1.6}_{-1.6}$	$157 . 31_{- 0.55}^{+ 0.55}$ $157.31^{ +0.55}_{-0.55}$	$- 0 . 7936_{- 0.0069}^{+ 0.0069}$ $-0.7936^{ +0.0069}_{-0.0069}$	This work
Period spacings’ fit	–	$67 . 534_{- 0.005}^{+ 0.005}$ $67.534^{ +0.005}_{-0.005}$	$607_{- 25}^{+ 27}$ $607^{ +27}_{-25}$	$1747 . 3_{- 7.7}^{+ 7.6}$ $1747.3^{ +7.6}_{-7.7}$	$158 . 5_{- 3.4}^{+ 3.4}$ $158.5^{ +3.4}_{-3.4}$	$- 0 . 872_{- 0.034}^{+ 0.034}$ $-0.872^{ +0.034}_{-0.034}$	Cunha et al. (2019)

Estimated	–	–	380	1632	156	–	Cunha et al. (2019)

Notes.

The values shown correspond to the median of the distributions and the 68% confidence intervals. For comparison, the values of the glitch parameters and asymptotic period spacing inferred by fitting the period spacings, as well as the glitch parameters estimated directly from the ASTEC buoyancy frequency profile, are also shown.

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