SIMBAD references

2021AJ....162...87B - Astron. J., 162, 87-87 (2021/September-0)

TOI-1231 b: a temperate, Neptune-sized planet transiting the nearby M3 dwarf NLTT 24399.

BURT J.A., DRAGOMIR D., MOLLIERE P., YOUNGBLOOD A., GARCIA MUNOZ A., McCANN J., KREIDBERG L., HUANG C.X., COLLINS K.A., EASTMAN J.D., ABE L., ALMENARA J.M., CROSSFIELD I.J.M., ZIEGLER C., RODRIGUEZ J.E., MAMAJEK E.E., STASSUN K.G., HALVERSON S.P., VILLANUEVA S., BUTLER R.P., WANG S.X., SCHWARZ R.P., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., AGABI A., BONFILS X., CIARDI D., COINTEPAS M., CRANE J.D., CROUZET N., DRANSFIELD G., FENG F., FURLAN E., GUILLOT T., GUPTA A.F., HOWELL S.B., JENSEN E.L.N., LAW N., MANN A.W., MARIE-SAINTE W., MATSON R.A., MATTHEWS E.C., MEKARNIA D., PEPPER J., SCOTT N., SHECTMAN S.A., SCHLIEDER J.E., SCHMIDER F.-X., STEVENS D.J., TESKE J.K., TRIAUD A.H.M.J., CHARBONNEAU D., BERTA-THOMPSON Z.K., BURKE C.J., DAYLAN T., BARCLAY T., WOHLER B. and BRASSEUR C.E.

Abstract (from CDS):

We report the discovery of a transiting, temperate, Neptune-sized exoplanet orbiting the nearby (d = 27.5 pc), M3V star TOI-1231 (NLTT 24399, L 248-27, 2MASS J10265947-5228099). The planet was detected using photometric data from the Transiting Exoplanet Survey Satellite and followed up with observations from the Las Cumbres Observatory and the Antarctica Search for Transiting ExoPlanets program. Combining the photometric data sets, we find that the newly discovered planet has a radius of 3.65–0.15+0.16R⊕ and an orbital period of 24.246 days. Radial velocity measurements obtained with the Planet Finder Spectrograph on the Magellan Clay telescope confirm the existence of the planet and lead to a mass measurement of 15.5 ± 3.3 M⊕. With an equilibrium temperature of just 330 K, TOI-1231 b is one of the coolest small planets accessible for atmospheric studies thus far, and its host star's bright near-infrared brightness (J = 8.88, Ks = 8.07) makes it an exciting target for the Hubble Space Telescope and the James Webb Space Telescope. Future atmospheric observations would enable the first comparative planetology efforts in the 250-350 K temperature regime via comparisons with K2-18 b. Furthermore, TOI-1231's high systemic radial velocity (70.5 km s–1) may allow for the detection of low-velocity hydrogen atoms escaping the planet by Doppler, shifting the H I Lyα stellar emission away from the geocoronal and interstellar medium absorption features.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet astronomy - Transit photometry - Radial velocity - Mini Neptunes

Simbad objects: 16

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021AJ....162...87B and select 'bookmark this link' or equivalent in the popup menu