The star’s low metallicity and fairly high space velocity suggest that KOI-4878 is older than the Sun.
But I don't know how to calculate an estimation for the age.
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You probably want to look if it has been picked up by an asteroseismic survey. Given that its a KOI, this could be true. Ages from asteroseismology are the most accurate ones, particularly that this star is a G4. – AtmosphericPrisonEscape Oct 02 '19 at 23:22
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@AtmosphericPrisonEscape Where would one look for that? – B--rian Mar 12 '21 at 12:29
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1@B--rian: I would think the relevant archives should be those with accurately sampled photometric time series data, i.e. Corot, Kepler, Tess. But I see you already posted the link to the exoplanet archive, which does link all those info together, if available. If standard methods (isochrone fitting, seismology) would allow the age determination, I suspect it would already have been done. – AtmosphericPrisonEscape Mar 12 '21 at 12:38
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@AtmosphericPrisonEscape Thanks for the hints, made me realize that I do not understand the exoplanet archive well enough - all I see is that there is no obvious entry age. – B--rian Mar 12 '21 at 12:48
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According to Wikipedia on KOI-4878.01 nobody did yet calculate the age of that object, but says exactly what you quoted:
its low metallicity and fairly high space velocity suggest that KOI-4878 is older than the Sun.
This supposidely relies on the following sources:
- https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=KOI-4878&type=KEPLER_TARGET
- https://www.drewexmachina.com/2019/09/05/koi-4878-01-keplers-most-earth-like-planet-candidate/
A search with the keyword KOI-4878.01 on different publication databases like arXiv or scholar.google did not help either.
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- How do scientists determine the age of stars? focuses on the general question how to determine the age of a star.
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