Asteroseismology of the GW Virginis stars SDSS J0349-0059 and VV 47

Abstract

We present an asteroseismological study of SDSS J0349-0059 and VV 47 aimed mainly at deriving their total mass on the basis of state-of-the-art PG 1159 evolutionary models. We compute adiabatic nonradial $g$-mode pulsation periods for PG 1159 evolutionary models with stellar masses ranging from $0.515$ to $0.741\ M_{\sun}$, that take into account the complete evolution of the progenitor stars. We first estimate a mean period spacing for both SDSS J0349-0059 and VV 47. By comparing the observed period spacing with the asymptotic period spacing we obtain $M_{\star}\sim 0.569\ M_{\sun}$ for SDSS J0349-0059 and $M_{\star}\sim 0.523\ M_{\sun}$ for VV 47. If we compare the observed period spacing with the average of the computed period spacings we found $M_{\star}\sim 0.535\ M_{\sun}$ for SDSS J0349-0059 and $M_{\star}\sim 0.528 M_{\sun}$ for VV 47. Searching for the best period fit we found, in the case of SDSS J0349-0059, an asteroseismological model with $M_{\star}= 0.542\ M_{\sun}$ and $T_{\mathrm{eff}}=91255$K. For VV 47, we could not find a unique and unambiguous asteroseismological model. Finally, for SDSS J0349-0059, we determined the rotation period as being $P_{\mathrm{rot}}=1/\Omega \sim 0.407$ days. The results presented in this work constitute a further step in the study of GW Vir stars through asteroseismology in the frame of fully evolutionary models of PG 1159 stars. In particular, once again it is shown the potential of asteroseismology to derive stellar masses of PG 1159 stars with an unprecedented precision.

arXiv comment13 pages, 16 figures, 6 tables. To be published in Astronomy and Astrophysics

References in corpus (23)

• Evolutionary and pulsational properties of white dwarf stars
• Pulsating White Dwarf Stars and Precision Asteroseismology
• The Element Abundances in Bare Planetary Nebula Central Stars and the Shell Burning in AGB Stars
• The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection
• Full evolutionary models for PG1159 stars. Implications for the helium-rich O(He) stars
• Asteroseismic inferences on GW Vir variable stars in the frame of new PG 1159 evolutionary models
• New nonadiabatic pulsation computations on full PG1159 evolutionary models: the theoretical GW Vir instability strip revisited
• Asteroseismological measurements on PG 1159-035, the prototype of the GW Vir variable stars
• The pulsation modes of the pre-white dwarf PG 1159-035
• Spectral analyses of eighteen hot H-deficient (pre-) white dwarfs from the Sloan Digital Sky Survey Data Release 4
• The born again (VLTP) scenario revisited: The mass of the remnants and implications for V4334 Sgr
• Asteroseismological constraints on the pulsating planetary nebula nucleus (PG1159-type) RX J2117.1+3412
• Asteroseismological constraints on the coolest GW Vir variable star (PG 1159-type)PG 0122+200
• Asteroseismological Observations of the Central Star of the Planetary Nebula NGC 1501
• The temporal changes of the pulsational periods of the pre-white dwarf PG 1159-035
• Asteroseismology of hot pre-white dwarf stars: the case of the DOV stars PG 2131+066 and PG 1707+427, and the PNNV star NGC 1501
• PG 2131+066: A Test of Pre-White Dwarf Asteroseismology
• On the possible existence of short-period g-mode instabilities powered by nuclear burning shells in post-AGB H-deficient (PG1159-type) stars
• Discovery of a new PG1159 (GW Vir) Pulsator
• On the systematics of asteroseismological mass determinations of PG1159 stars
• On the robustness of H-deficient post-AGB tracks
• The Nature of the Driving Mechanism in the Pulsating Hybrid PG 1159 Star Abell 43
• SDSS J0349-0059 is a GW Virginis star

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• Pulsating white dwarfs: new insights
• Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS: I. Asteroseismology of the GW Vir stars RX J2117+3412, HS 2324+3944, NGC 6905, NGC 1501, NGC 2371, and K 1-16
• First axion bounds from a pulsating helium-rich white dwarf star
• Probing the structure of Kepler ZZ Ceti stars with full evolutionary models-based asteroseismology
• Pulsating low-mass white dwarfs in the frame of new evolutionary sequences VI. Thin H-envelope sequences and asteroseismology of ELMV stars revisited
• Pulsating low-mass white dwarfs in the frame of new evolutionary sequences: V. Asteroseismology of ELMV white dwarf stars
• Photometric White Dwarf Rotation
• Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS VI. Asteroseismology of the GW Vir-type central star of the Planetary Nebula NGC 246
• On $\epsilon$-mechanism driven pulsations in VV 47
• Exploring the internal rotation of the extremely low-mass He-core white dwarf GD 278 with TESS asteroseismology