Edasich dK star
Number of posts : 2289 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Substellar fourth body in NSVS 7453183 system 16th January 2023, 4:22 am | |
| Interesting system: circumternary brown dwarf at NSVS 7453183 A photometric study of NSVS 7453183: a probable quadruple system with long-term surface activity - Quote :
- The VRC light curves were regularly measured for the eclipsing binary NSVS 7453183 as a part of our long-term observational project for studying of low-mass eclipsing binaries with a short orbital period and surface activity. The TESS light curve solution in Phoebe results to the detached configuration, where the temperature of primary component was adopted to T1 = 4300 K according to the SED approximation. It gives us T2= 4080 ± 100 K for the secondary component. The spectral type of the primary component was estimated to be K6 and the photometric mass ratio was derived q=0.86. We confirm presence of the third body in this system, a stellar companion with a minimal mass 0.33 MSun orbiting the eclipsing pair with a short period about 425 days, and propose the next, fourth body with a longer orbiting period of about 12 years, probably a brown dwarf with the minimal mass of 50 MJup. The hierarchical structure ((1+1)+1)+1 of this quadruple system is assumed. Characteristics and temporal variations of the dark region on the surface of the primary component were estimated. The average migration speed of about 10 deg/month was found during years 2020-2022.
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Daniel SuperEarth
Number of posts : 272 Registration date : 2009-11-14
| Subject: Re: Substellar fourth body in NSVS 7453183 system 16th January 2023, 9:38 am | |
| There is a similar system Nearby Gliese 570, It won’t impress me until find exoplanets and not brown dwarf in this configuration. | |
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