Related papers: Three Temperate Neptunes Orbiting Nearby Stars

HAT-P-26b: A Low-Density Neptune-Mass Planet Transiting a K Star

We report the discovery of HAT-P-26b, a transiting extrasolar planet orbiting the moderately bright V=11.744 K1 dwarf star GSC 0320-01027, with a period P = 4.234516 +- 0.000015 d, transit epoch Tc = 2455304.65122 +- 0.00035 (BJD), and…

Earth and Planetary Astrophysics · Physics 2015-05-20 J. D. Hartman , G. Á. Bakos , D. M. Kipping , G. Torres , G. Kovács , R. W. Noyes , D. W. Latham , A. W. Howard , D. A. Fischer , J. A. Johnson , G. W. Marcy , H. Isaacson , S. N. Quinn , L. A. Buchhave , B. Béky , D. D. Sasselov , R. P. Stefanik , G. A. Esquerdo , M. Everett , G. Perumpilly , J. Lázár , I. Papp , P. Sári

The SOPHIE search for northern extrasolar planets VIII. A warm Neptune orbiting HD164595

High-precision radial velocity surveys explore the population of low-mass exoplanets orbiting bright stars. This allows accurately deriving their orbital parameters such as their occurrence rate and the statistical distribution of their…

Earth and Planetary Astrophysics · Physics 2015-09-02 B. Courcol , F. Bouchy , F. Pepe , A. Santerne , X. Delfosse , L. Arnold , N. Astudillo-Defru , I. Boisse , X. Bonfils , S. Borgniet , V. Bourrier , N. Cabrera , M. Deleuil , O. Demangeon , R. F. Díaz , D. Ehrenreich , T. Forveille , G. Hébrard , A. M. Lagrange , G. Montagnier , C. Moutou , J. Rey , N. C. Santos , D. Ségransan , S. Udry , Paul A. Wilson

The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert

To investigate the origin of the features discovered in the exoplanet population, the knowledge of exoplanets' mass and radius with a good precision is essential. In this paper, we report the discovery of three transiting exoplanets by the…

Earth and Planetary Astrophysics · Physics 2018-03-07 Olivier. D. S. Demangeon , F. Faedi , G. Hébrard , D. J. A. Brown , S. C. C. Barros , A. P. Doyle , P. F. L. Maxted , A. Collier Cameron , K. L. Hay , J. Alikakos , D. R. Anderson , D. J. Armstrong , P. Boumis , A. S. Bonomo , F. Bouchy , C. A. Haswell , C. Hellier , F. Kiefer , K. W. F. Lam , L. Mancini , J. McCormac , A. J. Norton , H. P. Osborn , E. Palle , F. Pepe , D. L. Pollacco , J. Prieto-Arranz , D. Queloz , D. Ségransan , B. Smalley , A. H. M. J. Triaud , S. Udry , R. West , P. J. Wheatley

Models of Neptune-Mass Exoplanets: Emergent Fluxes and Albedos

There are now many known exoplanets with Msin(i) within a factor of two of Neptune's, including the transiting planets GJ436b and HAT-P-11b. Planets in this mass-range are different from their more massive cousins in several ways that are…

Earth and Planetary Astrophysics · Physics 2014-11-20 David S. Spiegel , Adam Burrows , Laurent Ibgui , Ivan Hubeny , John A. Milsom

HAT-P-39b--HAT-P-41b: Three Highly Inflated Transiting Hot Jupiters

We report the discovery of three new transiting extrasolar planets orbiting moderately bright (V=11.1 to 12.4) F stars. The planets have periods of P = 2.6940 d to 4.4572 d, masses of 0.60 M_J to 0.80 M_J, and radii of 1.57 R_J to 1.73 R_J.…

Earth and Planetary Astrophysics · Physics 2015-06-05 J. D. Hartman , G. Á. Bakos , B. Béky , G. Torres , D. W. Latham , Z. Csubry , K. Penev , A. Shporer , B. J. Fulton , L. A. Buchhave , J. A. Johnson , A. W. Howard , G. W. Marcy , D. A. Fischer , G. Kovács , R. W. Noyes , G. A. Esquerdo , M. Everett , T. Szklenár , S. N. Quinn , A. Bieryla , R. P. Knox , P. Hinz , D. D. Sasselov , G. Fűrész , R. P. Stefanik , J. Lázár , I. Papp , P. Sári

The HARPS search for southern extra-solar planets V. A 14 Earth-masses planet orbiting HD 4308

We present here the discovery and characterisation of a very light planet around HD4308. The planet orbits its star in 15.56 days. The circular radial-velocity variation presents a tiny semi-amplitude of 4.1 m/s that corresponds to a…

Astrophysics · Physics 2009-11-11 S. Udry , M. Mayor , W. Benz , J. -L. Bertaux , F. Bouchy , C. Lovis , C. Mordasini , F. Pepe , D. Queloz , J. -P. Sivan

A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067

Planets with radii between that of the Earth and Neptune (hereafter referred to as sub-Neptunes) are found in close-in orbits around more than half of all Sun-like stars. Yet, their composition, formation, and evolution remain poorly…

Earth and Planetary Astrophysics · Physics 2023-11-30 R. Luque , H. P. Osborn , A. Leleu , E. Pallé , A. Bonfanti , O. Barragán , T. G. Wilson , C. Broeg , A. Collier Cameron , M. Lendl , P. F. L. Maxted , Y. Alibert , D. Gandolfi , J. -B. Delisle , M. J. Hooton , J. A. Egger , G. Nowak , M. Lafarga , D. Rapetti , J. D. Twicken , J. C. Morales , I. Carleo , J. Orell-Miquel , V. Adibekyan , R. Alonso , A. Alqasim , P. J. Amado , D. R. Anderson , G. Anglada-Escudé , T. Bandy , T. Bárczy , D. Barrado Navascues , S. C. C. Barros , W. Baumjohann , D. Bayliss , J. L. Bean , M. Beck , T. Beck , W. Benz , N. Billot , X. Bonfils , L. Borsato , A. W. Boyle , A. Brandeker , E. M. Bryant , J. Cabrera , S. Carrazco Gaxiola , D. Charbonneau , S. Charnoz , D. R. Ciardi , W. D. Cochran , K. A. Collins , I. J. M. Crossfield , Sz. Csizmadia , P. E. Cubillos , F. Dai , M. B. Davies , H. J. Deeg , M. Deleuil , A. Deline , L. Delrez , O. D. S. Demangeon , B. -O. Demory , D. Ehrenreich , A. Erikson , E. Esparza-Borges , B. Falk , A. Fortier , L. Fossati , M. Fridlund , A. Fukui , J. Garcia-Mejia , S. Gill , M. Gillon , E. Goffo , Y. Gomez Maqueo Chew , M. Güdel , E. W. Guenther , M. N. Günther , A. P. Hatzes , Ch. Helling , K. M. Hesse , S. B. Howell , S. Hoyer , K. Ikuta , K. G. Isaak , J. M. Jenkins , T. Kagetani , L. L. Kiss , T. Kodama , J. Korth , K. W. F. Lam , J. Laskar , D. W. Latham , A. Lecavelier des Etangs , J. P. D. Leon , J. H. Livingston , D. Magrin , R. A. Matson , E. C. Matthews , C. Mordasini , M. Mori , M. Moyano , M. Munari , F. Murgas , N. Narita , V. Nascimbeni , G. Olofsson , H. L. M. Osborne , R. Ottensamer , I. Pagano , H. Parviainen , G. Peter , G. Piotto , D. Pollacco , D. Queloz , S. N. Quinn , A. Quirrenbach , R. Ragazzoni , N. Rando , F. Ratti , H. Rauer , S. Redfield , I. Ribas , G. R. Ricker , A. Rudat , L. Sabin , S. Salmon , N. C. Santos , G. Scandariato , N. Schanche , J. E. Schlieder , S. Seager , D. Ségransan , A. Shporer , A. E. Simon , A. M. S. Smith , S. G. Sousa , M. Stalport , Gy. M. Szabó , N. Thomas , A. Tuson , S. Udry , A. M. Vanderburg , V. Van Eylen , V. Van Grootel , J. Venturini , I. Walter , N. A. Walton , N. Watanabe , J. N. Winn , T. Zingales

Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018

In 2016, Kepler/K2 detected a system of two sub-Neptunes transiting the star HD 224018, one of them showing a mono-transit event. In 2017, we began a spectroscopic follow-up with HARPS-N to measure the dynamical masses of the planets using…

Earth and Planetary Astrophysics · Physics 2025-10-15 M. Damasso , L. Naponiello , A. Anna John , J. A. Egger , M. Cretignier , A. Mortier , A. S. Bonomo , A. Collier Cameron , X. Dumusque , T. Wilson , L. Buchhave , B. Nicholson , M. Stalport , A. Ghedina , D. W. Latham , J. Livingston , L. Malavolta , A. Sozzetti , J. M. Jenkins , G. Mantovan , A. F. Martínez Fiorenzano , L. Palethorpe , R. Tronsgaard , S. Udry , C. A. Watson

The HARPS search for southern extra-solar planets. XXVII. Up to seven planets orbiting HD 10180: probing the architecture of low-mass planetary systems

Context. Low-mass extrasolar planets are presently being discovered at an increased pace by radial velocity and transit surveys, opening a new window on planetary systems. Aims. We are conducting a high-precision radial velocity survey with…

Earth and Planetary Astrophysics · Physics 2015-05-20 C. Lovis , D. Ségransan , M. Mayor , S. Udry , W. Benz , J. -L. Bertaux , F. Bouchy , A. C. M. Correia , J. Laskar , G. Lo Curto , C. Mordasini , F. Pepe , D. Queloz , N. C. Santos

The HARPS search for southern extra-solar planets. VI. A Neptune-mass planet around the nearby M dwarf Gl 581

We report the discovery of a Neptune-mass planet around Gl 581 (M3V, M = 0.31 Msol), based on precise Doppler measurements with the HARPS spectrograph at La Silla Observatory. The radial velocities reveal a circular orbit of period P =…

Astrophysics · Physics 2009-11-11 X. Bonfils , T. Forveille , X. Delfosse , S. Udry , M. Mayor , C. Perrier , F. Bouchy , F. Pepe , D. Queloz , J. -L. Bertaux

Discovery of a Cool Planet of 5.5 Earth Masses Through Gravitational Microlensing

In the favoured core-accretion model of formation of planetary systems, solid planetesimals accumulate to build up planetary cores, which then accrete nebular gas if they are sufficiently massive. Around M-dwarf stars (the most common stars…

Astrophysics · Physics 2010-01-07 J. -P. Beaulieu , D. P. Bennett , P. Fouque , A. Williams , M. Dominik , U. G. Jorgensen , D. Kubas , A. Cassan , C. Coutures , J. Greenhill , K. Hill , J. Menzies , P. D. Sackett , M. Albrow , S. Brillant , J. A. R. Caldwell , J. J. Calitz , K. H. Cook , E. Corrales , M. Desort , S. Dieters , D. Dominis , J. Donatowicz , M. Hoffman , S. Kane , J. -B. Marquette , R. Martin , P. Meintjes , K. Pollard , K. Sahu , C. Vinter , J. Wambsganss , K. Woller , K. Horne , I. Steele , D. Bramich , M. Burgdorf , C. Snodgrass , M. Bode , A. Udalski , M. Szymanski , M. Kubiak , T. Wieckowski , G. Pietrzynski , I. Soszynski , O. Szewczyk , L. Wyrzykowski , B. Paczynski , the MOA Collaboration

Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1

One focus of modern astronomy is to detect temperate terrestrial exoplanets well-suited for atmospheric characterisation. A milestone was recently achieved with the detection of three Earth-sized planets transiting (i.e. passing in front…

Earth and Planetary Astrophysics · Physics 2017-03-07 Michael Gillon , Amaury H. M. J. Triaud , Brice-Olivier Demory , Emmanuel Jehin , Eric Agol , Katherine M. Deck , Susan M. Lederer , Julien de Wit , Artem Burdanov , James G. Ingalls , Emeline Bolmont , Jeremy Leconte , Sean N. Raymond , Franck Selsis , Martin Turbet , Khalid Barkaoui , Adam Burgasser , Matthew R. Burleigh , Sean J. Carey , Aleksander Chaushev , Chris M. Copperwheat , Laetitia Delrez , Catarina S. Fernandes , Daniel L. Holdsworth , Enrico J. Kotze , Valerie Van Grootel , Yaseen Almleaky , Zouhair Benkhaldoun , Pierre Magain , Didier Queloz

Transit Timing Observations of the Extrasolar Hot-Neptune Planet GL 436b

Gliese 436 is an M dwarf with a mass of 0.45 Msun and hosts the extrasolar planet GL 436b [3, 6, 7, 2], which is currently the least massive transiting planet with a mass of ~23.17 Mearth [10], and the only planet known to transit an M…

Solar and Stellar Astrophysics · Physics 2009-11-13 Guy S. Stringfellow , Jeffrey L. Coughlin , Mercedes López-Morales , Andrew C. Becker , Tom Krajci , Fabio Mezzalira , Eric Agol

Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs

Zechmeister et al. (2009) surveyed 38 nearby M dwarfs from March 2000 to March 2007 with VLT2 and the UVES spectrometer. This data has recently been reanalyzed (Butler et al. 2019), yielding a significant improvement in the Doppler velocity…

Earth and Planetary Astrophysics · Physics 2020-01-10 Fabo Feng , R. Paul Butler , Stephen A. Shectman , Jeffrey D. Crane , Steve Vogt , John Chambers , Hugh R. A. Jones , Sharon Xuesong Wang , Johanna K. Teske , Jenn Burt , Matias R. Diaz , Ian B. Thompson

The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)

This paper reports on the detection of a planetary system with three Super-Earths orbiting HD40307. HD40307 is a K2V metal-deficient star at a distance of only 13 parsec, part of the HARPS GTO high-precision planet-search programme. The…

Astrophysics · Physics 2009-11-13 M. Mayor , S. Udry , C. Lovis , F. Pepe , D. Queloz , W. Benz , J. -L. Bertaux , F. Bouchy , C. Mordasini , D. Segransan

HD 191939 revisited: New and refined planet mass determinations, and a new planet in the habitable zone

HD 191939 (TOI-1339) is a nearby (d=54pc), bright (V=9mag), and inactive Sun-like star (G9 V) known to host a multi-planet transiting system. Ground-based spectroscopic observations confirmed the planetary nature of the three transiting…

Earth and Planetary Astrophysics · Physics 2023-01-04 J. Orell-Miquel , G. Nowak , F. Murgas , E. Palle , G. Morello , R. Luque , M. Badenas-Agusti , I. Ribas , M. Lafarga , N. Espinoza , J. C. Morales , M. Zechmeister , A. Alqasim , W. D. Cochran , D. Gandolfi , E. Goffo , P. Kabáth , J. Korth , J. Livingston , K. W. F. Lam , A. Muresan , C. M. Persson , V. Van Eylen

The inflated, eccentric warm Jupiter TOI-4914 b orbiting a metal-poor star, and the hot Jupiters TOI-2714 b and TOI-2981 b

Recent observations of giant planets have revealed unexpected bulk densities. Hot Jupiters, in particular, appear larger than expected for their masses compared to planetary evolution models, while warm Jupiters seem denser than expected.…

Earth and Planetary Astrophysics · Physics 2024-11-06 G. Mantovan , T. G. Wilson , L. Borsato , T. Zingales , K. Biazzo , D. Nardiello , L. Malavolta , S. Desidera , F. Marzari , A. Collier Cameron , V. Nascimbeni , F. Z. Majidi , M. Montalto , G. Piotto , K. G. Stassun , J. N. Winn , J. M. Jenkins , L. Mignon , A. Bieryla , D. W. Latham , K. Barkaoui , K. A. Collins , P. Evans , M. M. Fausnaugh , V. Granata , V. Kostov , A. W. Mann , F. J. Pozuelos , D. J. Radford , H. M. Relles , P. Rowden , S. Seager , T. -G. Tan , M. Timmermans , C. N. Watkins

Characterizing planetary systems with SPIRou: a temperate sub-Neptune exoplanet orbiting the nearby fully-convective star GJ 1289 and a candidate around GJ 3378

We report the discovery of two new exoplanet systems around fully convective stars, found from the radial-velocity (RV) variations of their host stars measured with the nIR spectropolarimeter CFHT/SPIRou over multiple years. GJ 3378 b is a…

Earth and Planetary Astrophysics · Physics 2024-08-28 C. Moutou , M. Ould-Elhkim , J. -F. Donati , P. Charpentier , C. Cadieux , X. Delfosse , E. Artigau , L. Arnold , C. Baruteau , A. Carmona , N. J. Cook , P. Cortes-Zuleta , R. Doyon , G. Hebrard , the SLS consortium

TOI-1231 b: A Temperate, Neptune-Sized Planet Transiting the Nearby M3 Dwarf NLTT 24399

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…

Earth and Planetary Astrophysics · Physics 2021-08-11 Jennifer A. Burt , Diana Dragomir , Paul Mollière , Allison Youngblood , Antonio García Muñoz , John McCann , Laura Kreidberg , Chelsea X. Huang , Karen A. Collins , Jason D. Eastman , Lyu Abe , Jose M. Almenara , Ian J. M. Crossfield , Carl Ziegler , Joseph E. Rodriguez , Eric E. Mamajek , Keivan G. Stassun , Samuel P. Halverson , Steven Jr. Villanueva , R. Paul Butler , Sharon Xuesong Wang , Richard P. Schwarz , George R. Ricker , Roland Vanderspek , David W. Latham , S. Seager , Joshua N. Winn , Jon M. Jenkins , Abdelkrim Agabi , Xavier Bonfils , David Ciardi , Marion Cointepas , Jeffrey D. Crane , Nicolas Crouzet , Georgina Dransfield , Fabo Feng , Elise Furlan , Tristan Guillot , Arvind F. Gupta , Steve B. Howell , Eric L. N. Jensen , Nicholas Law , Andrew W. Mann , Wenceslas Marie-Sainte , Rachel A. Matson , Elisabeth C. Matthews , Djamel Mékarnia , Joshua Pepper , Nic Scott , Stephen A. Shectman , Joshua E. Schlieder , François-Xavier Schmider , Daniel J. Stevens , Johanna K. Teske , Amaury H. M. J. Triaud , David Charbonneau , Zachory K. Berta-Thompson , Christopher J. Burke , Tansu Daylan , Thomas Barclay , Bill Wohler , C. E. Brasseur

HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star

IW ../submit_V2/abstract.txt ( Row 1 Col 1 6:48 Ctrl-K H for help We report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120+/-0.012MJ, a radius of 0.563+/-(0.046,0.034)RJ, and an orbital…

Earth and Planetary Astrophysics · Physics 2015-11-11 G. Á. Bakos , K. Penev , D. Bayliss , J. D. Hartman , G. Zhou , R. Brahm , L. Mancini , M. de Val-Borro , W. Bhatti , A. Jordán , M. Rabus , N. Espinoza , Z. Csubry , A. W. Howard , B. J. Fulton , L. A. Buchhave , S. Ciceri , T. Henning , B. Schmidt , H. Isaacson , R. W. Noyes , G. W. Marcy , V. Suc , A. R. Howe , A. S. Burrows , J. Lázár , I. Papp , P. Sári