TRIMOR - three-dimensional correlation technique to analyse multi-order spectra of triple stellar systems: application to HD 188753

Mazeh, T.; Tsodikovich, Yevgeny; Segal, Y.; Zucker, S.; Udry, S.; Mayor, M.

doi:10.1111/j.1365-2966.2009.15321.x

Cited by 27 publications

(24 citation statements)

References 57 publications

(117 reference statements)

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“…Appendix A provides the values of ρ and θ derived from the micrometric and interferometric measurements of HD 188753. In addition, the radial-velocity observations V obs used in this work can be found in Griffin (1977), Konacki (2005) and Mazeh et al (2009). The theoretical values in Eqs.…”

Section: Methods and Modelmentioning

confidence: 99%

“…In order to derive the radial velocities of the faintest star, Mazeh et al (2009) applied a three-dimensional (3D) correlation technique (TRIMOR) to the data obtained by Eggenberger et al (2007). In this study, we used the radialvelocity measurements from Griffin (1977), Konacki (2005) and Mazeh et al (2009).…”

Section: Figmentioning

confidence: 99%

“…the single star, while the grey line denotes the RV solution of the Bab sub-system. For comparison, we added the RV measurements from Griffin (1977), Konacki (2005) and Mazeh et al (2009), after having removed the 154-day modulation. The final orbital parameters determined from the best-fit solution are given in Table 2 .…”

Section: Orbit Of the Ab Systemmentioning

confidence: 99%

“…To demonstrate the capacity of their new algorithm, TRIMOR, Mazeh et al (2009) re-analysed the spectra of HD 188753 obtained by Eggenberger et al (2007). As a result, they derived the radial velocities of the three stars, allowing them to classify the close pair as a double-lined spectroscopic binary (SB2).…”

Section: Orbit Of the Bab Sub-systemmentioning

confidence: 99%

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Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler

Marcadon

Appourchaux

Marques

2018

A&A

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Context. The NASA Kepler space telescope has detected solar-like oscillations in several hundreds of single stars, thereby providing a way to determine precise stellar parameters using asteroseismology. Aims. In this work, we aim to derive the fundamental parameters of a close triple star system, HD 188753, for which asteroseismic and astrometric observations allow independent measurements of stellar masses. Methods. We used six months of Kepler photometry available for HD 188753 to detect the oscillation envelopes of the two brightest stars. For each star, we extracted the individual mode frequencies by fitting the power spectrum using a maximum likelihood estimation approach. We then derived initial guesses of the stellar masses and ages based on two seismic parameters and on a characteristic frequency ratio, and modelled the two components independently with the stellar evolution code CESTAM. In addition, we derived the masses of the three stars by applying a Bayesian analysis to the position and radial-velocity measurements of the system. Results. Based on stellar modelling, the mean common age of the system is 10.8 ± 0.2 Gyr and the masses of the two seismic components are M A = 0.99 ± 0.01 M ⊙ and M Ba = 0.86 ± 0.01 M ⊙ . From the mass ratio of the close pair, M Bb /M Ba = 0.767 ± 0.006, the mass of the faintest star is M Bb = 0.66 ± 0.01 M ⊙ and the total seismic mass of the system is then M syst = 2.51 ± 0.02 M ⊙ . This value agrees perfectly with the total mass derived from our orbital analysis, M syst = 2.51 +0.20 −0.18 M ⊙ , and leads to the best current estimate of the parallax for the system, π = 21.9 ± 0.2 mas. In addition, the minimal relative inclination between the inner and outer orbits is 10.9 • ± 1.5 • , implying that the system does not have a coplanar configuration.

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Section: Methods and Modelmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Orbit Of the Ab Systemmentioning

confidence: 99%

Section: Orbit Of the Bab Sub-systemmentioning

confidence: 99%

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Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler

Marcadon

Appourchaux

Marques

2018

A&A

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“…Despite our efforts, we did not detect any spectral signature of C0121-Ba, even when analyzing the data with TRIMOR (Mazeh et al 2009), an algorithm to analyze multi-order spectra of triple systems. This might indicate that Ba is a substantially hotter star, with spectral type A or even earlier.…”

Section: Todmor Analysis Of the Sophie Spectramentioning

confidence: 99%

CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary

Tal-Or

Santerne

Mazeh

et al. 2011

A&A

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This paper presents the case of CoRoT LRa02_E2_0121, which was initially classified as a Neptune-size transiting-planet candidate on a relatively wide orbit of 36.3 days. Follow-up observations were performed with UVES, Sandiford, SOPHIE, and HARPS. These observations revealed a faint companion in the spectra. To find the true nature of the system we derived the radial velocities of the faint companion using TODMOR -a two-dimensional correlation technique, applied to the SOPHIE spectra. Modeling the lightcurve with EBAS we discovered a secondary eclipse with a depth of ∼0.07%, indicating a diluted eclipsing binary. Combined MCMC modeling of the lightcurve and the radial velocities suggested that CoRoT LRa02_E2_0121 is a hierarchical triple system with an evolved G-type primary and an A-type:F-type grazing eclipsing binary. Such triple systems are difficult to discover.

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The Exoplanet Handbook

Perryman¹

2018

174

149

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TRIMOR - three-dimensional correlation technique to analyse multi-order spectra of triple stellar systems: application to HD 188753

Cited by 27 publications

References 57 publications

Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler

Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler

CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary

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