Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

  title={Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)},
  author={J. Kemmer and Stephan Stock and Diana Kossakowski and A. Kaminski and Karan Molaverdikhani and Martin Schlecker and Jos{\'e} Antonio Caballero and Pedro J. Amado and Nicola Astudillo-Defru and Xavier Bonfils and David R. Ciardi and Karen A. Collins and N{\'e}stor Espinoza and A. Fukui and Teruyuki Hirano and Jon M. Jenkins and David W. Latham and Elisabeth C. Matthews and Norio Narita and Enric Pall{\'e} and Hannu Parviainen and Andreas Quirrenbach and Ansgar Reiners and Ignasi Ribas and George R. Ricker and Joshua E. Schlieder and Sara Seager and Roland K. Vanderspek and Joshua N. Winn and Jose M. Almenara and V{\'i}ctor B{\'e}jar and P. Bluhm and F. Bouchy and Padi T. Boyd and J. L. Christiansen and Carlos Cifuentes and Ryan Cloutier and Kevin I. Collins and M. Cort{\'e}s-Contreras and Ian J. M. Crossfield and Nicolas Crouzet and Jerome P. de Leon and D. D. Della-Rose and Xavier Delfosse and Stefan Dreizler and Emma Esparza-Borges and Zahra Essack and Thierry Forveille and Pedro Figueira and D. Galad{\'i}-Enr{\'i}quez and Tianjun Gan and Ana Glidden and Erica J. Gonzales and Pere Guerra and Hiroki Harakawa and A. P. Hatzes and Th. Henning and E. Herrero and Klaus W. Hodapp and Yasunori Hori and Steve B. Howell and Masahiro Ikoma and Keisuke Isogai and S. V. Jeffers and Martin K{\"u}rster and Kiyoe Kawauchi and T. Kimura and P'eter Klagyivik and Takeshi Kotani and Tomomi Kurokawa and N. Kusakabe and Masayuki Kuzuhara and Marina Lafarga and J. H. Livingston and Rafael Luque and Rachel A. Matson and Juan Carlos Morales and Mayuko Mori and Philip S. Muirhead and Felipe Murgas and Jun Nishikawa and Taku Nishiumi and Masashi Omiya and Sabine Reffert and C. Rodr{\'i}guez L{\'o}pez and Nuno C. Santos and P. Sch{\"o}fer and Richard P. Schwarz and Bernie Shiao and M. Tamura and Yuka Terada and Joseph D. Twicken and A. Ueda and S{\'e}bastien Vievard and Noriharu Watanabe and Mathias Zechmeister},
  journal={Astronomy \& Astrophysics},
We present the confirmation and characterisation of GJ 3473 b (G 50–16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary… 

The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc

We present the Transiting Exoplanet Survey Satellite (TESS) discovery of the LHS 1678 (TOI-696) exoplanet system, comprised of two approximately Earth-sized transiting planets and a likely

A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds

LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 pc. The primary star LTT 1445A (0.257 M ⊙) is known to host the transiting planet LTT 1445Ab with an orbital period

A More Precise Mass for GJ 1214 b and the Frequency of Multiplanet Systems Around Mid-M Dwarfs

We present an intensive effort to refine the mass and orbit of the enveloped terrestrial planet GJ 1214 b using 165 radial velocity (RV) measurements taken with the HARPS spectrograph over a period

Follow-Up and Validation of K2 and TESS Planetary Systems With Keck NIRC2 Adaptive Optics Imaging

High resolution imaging (HRI) is a critical part of the transiting exoplanet follow-up and validation process. HRI allows previously unresolved stellar companions and background blends to be

TOI-1634 b: An Ultra-short-period Keystone Planet Sitting inside the M-dwarf Radius Valley

Studies of close-in planets orbiting M dwarfs have suggested that the M-dwarf radius valley may be well explained by distinct formation timescales between enveloped terrestrials and rocky planets

An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685

Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS

Mass and density of the transiting hot and rocky super-Earth LHS 1478 b (TOI-1640 b)

One of the main objectives of the Transiting Exoplanet Survey Satellite (TESS) mission is the discovery of small rocky planets around relatively bright nearby stars. Here, we report the discovery and



Reports on Progress in Physics

IN spite of ‘blitzes’ and ‘black–outs’, of paper shortages and general war tension, vol. 7 of the Physical Society's “Reports on Progress in Physics” for the year 1940 has duly made its appearance,

Publications of the Astro

  • 2019

A Guide to NumPy (Trelgol

  • Publishing USA),
  • 2014

2020a) TOI-1235 b(a,b) TYC 4384–1735–1

  • Bluhm et al
  • 2020

2018, in Ground-Based and Airborne

  • 2018

TESS time series analysis

  • A&A,
  • 2018

From Cold to Hot Irradiated Gaseous Exoplanets: Fingerprints of Chemical Disequilibrium in Atmospheric Spectra

Almost all planetary atmospheres are affected by disequilibrium chemical processes. In this paper, we introduce our recently developed chemical kinetic model (ChemKM). We show that the results of our

The Impact of Solar-like Variability on the Detectability of Transiting Terrestrial Planets

Transit photometry is a promising method for discovering extrasolar planets as small as Earth from space-based photometers, and several near-term photometric missions are on the drawing board. In

From Cold to Hot Irradiated Gaseous Exoplanets: Toward an Observation-based Classification Scheme

A carbon-to-oxygen ratio (C/O) of around unity is believed to act as a natural separator of water- and methane-dominated spectra when characterizing exoplanet atmospheres. In this paper, we quantify