Super-Earth planet zips through the habitable zone of red dwarf star

Reference paper, A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508,, 30-June-2022. “Abstract We report the near-infrared radial velocity (RV) discovery of a super-Earth planet on a 10.77 d orbit around the M4.5 dwarf Ross 508 (Jmag = 9.1). Using precision RVs from the Subaru Telescope IRD (InfraRed Doppler) instrument, we derive a semi-amplitude of 3.92 +0.60/−0.58 ms^−1⁠, corresponding to a planet with a minimum mass m sini=4.00 +0.53/−0.55M⊕⁠..."

My observation. Using properties in the paper I calculated P = 1.0761E+01 or 10.761 day with e = 0. The abstract shows period is a "super-Earth planet on a 10.77 d orbit." Host star mass = 0.1774 Msun, exoplanet mass = 4.0045E+00 earth masses or 1.26E-2 Mjup. In 1 Gyr period, Ross 508 b could complete 3.3941E+10 or more than 33 billion revolutions around Ross 508 host star. The paper provides a system age spread of 1 to 10 Gyr - "We found no stellar companions at a separation wider than ∼0′′.1 from the central star. At separations exterior to 0′′.25 (rproj ∼ 2.8 au), the comparison of the contrast limits with the Baraffe et al. (2003) evolutionary models enables us to rule out companions that are more massive than 35 MJ or 70 MJ for an assumed system age of 1 Gyr or 10 Gyr, respectively."

I calculate mean density 5.3678 g cm^-3 for Ross 508 b using 4 earth mass and radius 1.6 earth radii.

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