HD 213885b: A transiting 1-d-period super-Earth with an Earth-like composition around a bright (V = 7.9) star unveiled by TESS
- Espinoza, N.
- Brahm, R.
- Henning, T.
- Jordán, A.
- Dorn, C.
- Rojas, F.
- Sarkis, P.
- Kossakowski, D.
- Schlecker, M.
- Díaz, M.R.
- Jenkins, J.S.
- Aguilera-Gomez, C.
- Jenkins, J.M.
- Twicken, J.D.
- Collins, K.A.
- Lissauer, J.
- Armstrong, D.J.
- Adibekyan, V.
- Barrado, D.
- Barros, S.C.C.
- Battley, M.
- Bayliss, D.
- Bouchy, F.
- Bryant, E.M.
- Cooke, B.F.
- Demangeon, O.D.S.
- Dumusque, X.
- Figueira, P.
- Giles, H.
- Lillo-Box, J.
- Lovis, C.
- Nielsen, L.D.
- Pepe, F.
- Pollacco, D.
- Santos, N.C.
- Sousa, S.G.
- Udry, S.
- Wheatley, P.J.
- Turner, O.
- Marmier, M.
- Ségransan, D.
- Ricker, G.
- Latham, D.
- Seager, S.
- Winn, J.N.
- Kielkopf, J.F.
- Hart, R.
- Wingham, G.
- Jensen, E.L.N.
- Hełminiak, K.G.
- Tokovinin, A.
- Briceño, C.
- Ziegler, C.
- Law, N.M.
- Mann, A.W.
- Daylan, T.
- Doty, J.P.
- Guerrero, N.
- Boyd, P.
- Crossfield, I.
- Morris, R.L.
- Henze, C.E.
- Chacon, A.D.
DOIAbstract
We report the discovery of the 1.008-d, ultrashort period (USP) super-Earth HD 213885b (TOI-141b) orbiting the bright (V= 7.9) star HD 213885 (TOI-141, TIC 403224672), detected using photometry from the recently launched TESS mission. Using FEROS, HARPS, and CORALIE radial velocities, we measure a precise mass of 8.8 ±0.6M⊙ for this 1.74±0.05R⊙ exoplanet, which provides enough information to constrain its bulk composition - similar to Earth's but enriched in iron. The radius, mass, and stellar irradiation of HD 213885b are, given our data, very similar to 55 Cancri e, making this exoplanet a good target to perform comparative exoplanetology of short period, highly irradiated super-Earths. Our precise radial velocities reveal an additional 4...