Binary stars in which oscillations can be studied in either or both components can provide powerful constraints on our understanding of stellar physics. The bright binary 12 Bootis (12 Boo) is a particularly promising system because the primary is roughly 60 per cent brighter than the secondary despite being only a few per cent more massive. Both stars have substantial surface convection zones and are therefore, presumably, solar-like oscillators. We report here the first detection of solar-like oscillations and ellipsoidal variations in the TESS light curve of 12 Boo. Though the solar-like oscillations are not clear enough to unambiguously measure individual mode frequencies, we combine global asteroseismic parameters and a precise fit to the spectral energy distribution (SED) to provide new constraints on the properties of the system that are several times more precise than values in the literature. The SED fit alone provides new effective temperatures, luminosities, and radii of 6115 +/- 45 K, 7.531 +/- 0.110 L-circle dot, and 2.450 +/- 0.045 R-circle dot for 12 Boo A and 6200 +/- 60 K, 4.692 +/- 0.095 L-circle dot, and 1.901 +/- 0.045 R-circle dot for 12 Boo B. When combined with our asteroseismic constraints on 12 Boo A, we obtain an age of 2.67(-0.16)(+0.12) Gyr, which is consistent with that of 12 Boo B.

Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis / Warrick H. Ball; Andrea Miglio; William J. Chaplin; Keivan G. Stassun; Rafael García; Lucia González-Cuesta; Savita Mathur; Thierry Appourchaux; Othman Benomar; Derek L. Buzasi; Chen Jiang; Cenk Kayhan; Sibel Örtel; Zeynep Çelik Orhan; Mutlu Yıldız; J. M. Joel Ong; Sarbani Basu. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - ELETTRONICO. - 516:3(2022), pp. 3709-3714. [10.1093/mnras/stac2212]

Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis

Andrea Miglio;
2022

Abstract

Binary stars in which oscillations can be studied in either or both components can provide powerful constraints on our understanding of stellar physics. The bright binary 12 Bootis (12 Boo) is a particularly promising system because the primary is roughly 60 per cent brighter than the secondary despite being only a few per cent more massive. Both stars have substantial surface convection zones and are therefore, presumably, solar-like oscillators. We report here the first detection of solar-like oscillations and ellipsoidal variations in the TESS light curve of 12 Boo. Though the solar-like oscillations are not clear enough to unambiguously measure individual mode frequencies, we combine global asteroseismic parameters and a precise fit to the spectral energy distribution (SED) to provide new constraints on the properties of the system that are several times more precise than values in the literature. The SED fit alone provides new effective temperatures, luminosities, and radii of 6115 +/- 45 K, 7.531 +/- 0.110 L-circle dot, and 2.450 +/- 0.045 R-circle dot for 12 Boo A and 6200 +/- 60 K, 4.692 +/- 0.095 L-circle dot, and 1.901 +/- 0.045 R-circle dot for 12 Boo B. When combined with our asteroseismic constraints on 12 Boo A, we obtain an age of 2.67(-0.16)(+0.12) Gyr, which is consistent with that of 12 Boo B.
2022
Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis / Warrick H. Ball; Andrea Miglio; William J. Chaplin; Keivan G. Stassun; Rafael García; Lucia González-Cuesta; Savita Mathur; Thierry Appourchaux; Othman Benomar; Derek L. Buzasi; Chen Jiang; Cenk Kayhan; Sibel Örtel; Zeynep Çelik Orhan; Mutlu Yıldız; J. M. Joel Ong; Sarbani Basu. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - ELETTRONICO. - 516:3(2022), pp. 3709-3714. [10.1093/mnras/stac2212]
Warrick H. Ball; Andrea Miglio; William J. Chaplin; Keivan G. Stassun; Rafael García; Lucia González-Cuesta; Savita Mathur; Thierry Appourchaux; Othman Benomar; Derek L. Buzasi; Chen Jiang; Cenk Kayhan; Sibel Örtel; Zeynep Çelik Orhan; Mutlu Yıldız; J. M. Joel Ong; Sarbani Basu
File in questo prodotto:
File Dimensione Formato  
Ball et al. - 2022 - Solar-like oscillations and ellipsoidal variations.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Creative commons
Dimensione 1.23 MB
Formato Adobe PDF
1.23 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/898611
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact