Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization

Luque, R.; Pallé, E.; Kossakowski, D.; Dreizler, S.; Kemmer, J.; Espinoza, N.; Burt, J.; Anglada-Escudé, G.; Béjar, V.J.S.; Caballero, J.A.; Collins, K.A.; Collins, K.I.; Cortés-Contreras, M.; Díez-Alonso, E.; Feng, F.; Hatzes, A.; Hellier, C.; Henning, T.; Jeffers, S.V.; Kaltenegger, L.; Kürster, M.; Madden, J.; Molaverdikhani, K.; Montes, D.; Narita, N.; Nowak, G.; Ofir, A.; Oshagh, M.; Parviainen, H.; Quirrenbach, A.; Reffert, S.; Reiners, A.; Rodríguez-López, C.; Schlecker, M.; Stock, S.; Trifonov, T.; Winn, J.N.; Zapatero Osorio, M.R.; Zechmeister, M.; Amado, P.J.; Anderson, D.R.; Batalha, N.E.; Bauer, F.F.; Bluhm, P.; Burke, C.J.; Butler, R.P.; Caldwell, D.A.; Chen, G.; Crane, J.D.; Dragomir, D.; Dressing, C.D.; Dynes, S.; Jenkins, J.M.; Kaminski, A.; Klahr, H.; Kotani, T.; Lafarga, M.; Latham, D.W.; Lewin, P.; McDermott, S.; Montañés-Rodríguez, P.; Morales, J.C.; Murgas, F.; Nagel, E.; Pedraz, S.; Ribas, I.; Ricker, G.R.; Rowden, P.; Seager, S.; Shectman, S.A.; Tamura, M.; Teske, J.; Twicken, J.D.; Vanderspeck, R.; Wang, S.X.; Wohler, B.

doi:10.1051/0004-6361/201935801

Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets (2020)
Journal Article
Hellier, Smalley, & Maxted. (2020). Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202038296

We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12 magnitude. The planet WASP-148b is a hot Jupiter of 0.... Read More about Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets.

TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet (2020)
Journal Article
Hellier. (2020). TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet. Astronomical Journal, https://doi.org/10.3847/1538-3881/ab9f95

The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (˜4 days) transiting planet around the bright (V = 7.9... Read More about TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet.

TIC 278956474: Two close binaries in one young quadruple system, identified by TESS (2020)
Journal Article
Hellier. (2020). TIC 278956474: Two close binaries in one young quadruple system, identified by TESS. Astrophysical Journal, https://doi.org/10.3847/1538-3881/ab9d20

We have identified a quadruple system with two close eclipsing binaries in TESS data. The object is unresolved in Gaia and appears as a single source at parallax 1.08~$\pm$0.01 mas. Both binaries have observable primary and secondary eclipses and wer... Read More about TIC 278956474: Two close binaries in one young quadruple system, identified by TESS.

Publisher Correction: A planet within the debris disk around the pre-main-sequence star AU Microscopii (2020)
Journal Article
Plavchan, P., Barclay, T., Gagné, J., Gao, P., Cale, B., Matzko, W., …Zilberman, P. (2020). Publisher Correction: A planet within the debris disk around the pre-main-sequence star AU Microscopii. Nature, 583(7818), E31-E31. https://doi.org/10.1038/s41586-020-2516-1

Correction to: Nature https://www.nature.com/articles/s41586-020-2400-zPublished online 24 June 2020 In Fig. 3 of this Article, the subscript ‘Sun’ symbols on both axis labels (R☉ and M☉) should have been subscript ‘Earth’ symbols (R⊕ and M⊕), as... Read More about Publisher Correction: A planet within the debris disk around the pre-main-sequence star AU Microscopii.

Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission (2020)
Journal Article
Carmichael, T. W., Quinn, S. N., Mustill, A. J., Huang, C., Zhou, G., Persson, C. M., …Latham, D. W. (in press). Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission. Astronomical Journal, 160(1), 53. https://doi.org/10.3847/1538-3881/ab9b84

We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P = 6.55604 ± 0.00016 days, a mass of Mb = 64.1 ± 1.9... Read More about Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission.

A planet within the debris disk around the pre-main-sequence star AU Microscopii. (2020)
Journal Article
Hellier. (2020). A planet within the debris disk around the pre-main-sequence star AU Microscopii. Nature, 497 - 500. https://doi.org/10.1038/s41586-020-2400-z

AU Microscopii (AU Mic) is the second closest pre-main-sequence star, at a distance of 9.79 parsecs and with an age of 22 million years1. AU Mic possesses a relatively rare2 and spatially resolved3 edge-on debris disk extending from about 35 to 210 a... Read More about A planet within the debris disk around the pre-main-sequence star AU Microscopii..

Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b (2020)
Journal Article
Cooke, B. F., Pollacco, D., Almleaky, Y., Barkaoui, K., Benkhaldoun, Z., Blake, J. A., …Alikakos, J. (2020). Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b. Astronomical Journal, 159(6), Article 255. https://doi.org/10.3847/1538-3881/ab88db

We report the discovery of two transiting exoplanets from the WASP survey, WASP-150b and WASP-176b. WASP-150b is an eccentric (e = 0.38) hot Jupiter on a 5.6 day orbit around a V = 12.03, F8 main-sequence host. The host star has a mass and radius of... Read More about Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b.

TOI-1338: TESS' First Transiting Circumbinary Planet (2020)
Journal Article
Kostov, V. B., Orosz, J. A., Feinstein, A. D., Welsh, W. F., Cukier, W., Haghighipour, N., …van der Straeten, T. (2020). TOI-1338: TESS' First Transiting Circumbinary Planet. Astronomical Journal, 159(6), https://doi.org/10.3847/1538-3881/ab8a48

We report the detection of the first circumbinary planet (CBP) found by Transiting Exoplanet Survey Satellite (TESS). The target, a known eclipsing binary, was observed in sectors 1 through 12 at 30 minute cadence and in sectors 4 through 12 at 2 min... Read More about TOI-1338: TESS' First Transiting Circumbinary Planet.

A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS (2020)
Journal Article
Hellier. (2020). A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/201937179

We report the detection of a transiting super-Earth-sized planet (R = 1.39 ± 0.09 R?) in a 1.4-day orbit around L 168-9 (TOI-134), a bright M1V dwarf (V = 11, K = 7.1) located at 25.15 ± 0.02 pc. The host star was observed in the first sector of the... Read More about A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS.

HATS-47b, HATS-48Ab, HATS-49b and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs (2020)
Journal Article
Hellier. (2020). HATS-47b, HATS-48Ab, HATS-49b and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs. Astronomical Journal, https://doi.org/10.3847/1538-3881/ab7821

We report the discovery of four transiting giant planets around K dwarfs. The planets HATS-47b, HATS-48Ab, HATS49b, and HATS-72b have masses of 0.369+ 0.0210.031MJ, 0.243+ 0.0300.022 MJ, 0.353+ 0.0270.038 MJ, and 0.1254. 0.0039 MJ, respectively, and... Read More about HATS-47b, HATS-48Ab, HATS-49b and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs.

LHS 1815b: The First Thick-disk Planet Detected by TESS (2020)
Journal Article
Gan, T., Shporer, A., Livingston, J. H., Collins, K. A., Mao, S., Trani, A. A., …Rojas-Ayala, B. (in press). LHS 1815b: The First Thick-disk Planet Detected by TESS. Astronomical Journal, 159(4), 160. https://doi.org/10.3847/1538-3881/ab775a

We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87... Read More about LHS 1815b: The First Thick-disk Planet Detected by TESS.

GJ 1252 b: A 1.2 R? Planet Transiting an M3 Dwarf at 20.4 pc (2020)
Journal Article
Hellier. (2020). GJ 1252 b: A 1.2 R? Planet Transiting an M3 Dwarf at 20.4 pc. Astrophysical Journal, https://doi.org/10.3847/2041-8213/ab7020

We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TES... Read More about GJ 1252 b: A 1.2 R? Planet Transiting an M3 Dwarf at 20.4 pc.

K2 Looks Toward WASP-28 and WASP-151 (2019)
Journal Article
Močnik, T., Hellier, C., & Anderson, D. R. (2020). K2 Looks Toward WASP-28 and WASP-151. Publications of the Astronomical Society of the Pacific, 132(1007), 014401. https://doi.org/10.1088/1538-3873/ab5598

By analyzing the short-cadence K2 photometry from the observing Campaign 12 we refine the system parameters of hot Jupiter WASP-28b and hot Saturn WASP-151b. We report the non-detection and corresponding upper limits for transit-timing and transit-du... Read More about K2 Looks Toward WASP-28 and WASP-151.

NGTS and WASP photometric recovery of a single-transit candidate from TESS (2019)
Journal Article
Hellier. (2019). NGTS and WASP photometric recovery of a single-transit candidate from TESS. Monthly Notices of the Royal Astronomical Society, 1548 - 1553. https://doi.org/10.1093/mnras/stz3212

The Transiting Exoplanet Survey Satellite (TESS) produces a large number of single-transit event candidates, since the mission monitors most stars for only ~27 d. Such candidates correspond to long-period planets or eclipsing binaries. Using the TESS... Read More about NGTS and WASP photometric recovery of a single-transit candidate from TESS.

WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b (2019)
Journal Article
Smalley, Hellier, & Maxted. (2019). WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b. Monthly Notices of the Royal Astronomical Society, 1479-1487. https://doi.org/10.1093/mnras/stz2713

We report on four new transiting hot Jupiters discovered by the WASP-South survey. WASP-178b transits a V = 9.9, A1V star with Teff = 9350 ± 150 K, the second-hottest transit host known. It has a highly bloated radius of 1.81 ± 0.09 RJup, in line wit... Read More about WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b.

WASP-169, WASP-171, WASP-175, and WASP-182: three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-South (2019)
Journal Article
Hellier, Smalley, & Maxted. (2019). WASP-169, WASP-171, WASP-175, and WASP-182: three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-South. Monthly Notices of the Royal Astronomical Society, 2478 -2487. https://doi.org/10.1093/mnras/stz2351

We present the discovery of four new giant planets from the Wide Angle Search for Planets-South (WASP-South), three hot Jupiters and one bloated sub-Saturn mass planet: WASP-169b, WASP-171b, WASP-175b, and WASP-182b. Besides the discovery photometry... Read More about WASP-169, WASP-171, WASP-175, and WASP-182: three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-South.

Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS (2019)
Journal Article
Hellier. (2019). Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS. Astronomical Journal, 141 - 141. https://doi.org/10.3847/1538-3881/ab36b5

Wide-field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.0... Read More about Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS.

WASP-180Ab: Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary (2019)
Journal Article
Temple, L. Y., Hellier, C., Anderson, D. R., Barkaoui, K., Bouchy, F., Brown, D. J. A., …Zouhair, B. (2019). WASP-180Ab: Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary. Monthly Notices of the Royal Astronomical Society, 490(2), 2467-2474. https://doi.org/10.1093/mnras/stz2632

We report the discovery and characterization of WASP-180Ab, a hot Jupiter confirmed by the detection of its Doppler shadow and by measuring its mass using radial velocities. We find the 0.9 ± 0.1 MJup, 1.24 ± 0.04 RJup planet to be in a misaligne... Read More about WASP-180Ab: Doppler tomography of an hot Jupiter orbiting the primary star in a visual binary.

WASP-166b: a bloated super-Neptune transiting a V = 9 star (2019)
Journal Article
Maxted, Hellier, & Smalley. (2019). WASP-166b: a bloated super-Neptune transiting a V = 9 star. Monthly Notices of the Royal Astronomical Society, 3067 -3075. https://doi.org/10.1093/mnras/stz1903

We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 MJup (1.9 MNep) and a bloated radius of 0.63 RJup. It transits a V = 9.36, F9V star in a 5.44-d orbit that is aligned with the stellar rotation axis (sky-projected obliqu... Read More about WASP-166b: a bloated super-Neptune transiting a V = 9 star.

Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization (2019)
Journal Article
Luque, R., Pallé, E., Kossakowski, D., Dreizler, S., Kemmer, J., Espinoza, N., …Wohler, B. (2019). Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization. Astronomy and Astrophysics, 628, Article A39. https://doi.org/10.1051/0004-6361/201935801

We report the detection of a transiting Earth-size planet around GJ 357, a nearby M2.5 V star, using data from the Transiting Exoplanet Survey Satellite (TESS). GJ 357 b (TOI-562.01) is a transiting, hot, Earth-sized planet (Teq = 525 ± 11 K) with a... Read More about Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization.

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