Exoplanets and Stellar Physics

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High-contrast observations of brown dwarf companion HR 2562 B with the vector Apodizing Phase Plate coronagraph

(2021)

Authors:

Ben J Sutlieff, Alexander J Bohn, Jayne L Birkby, Matthew A Kenworthy, Katie M Morzinski, David S Doelman, Jared R Males, Frans Snik, Laird M Close, Philip M Hinz, David Charbonneau
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Hot planets around cool stars – two short-period mini-Neptunes transiting the late K-dwarf TOI-1260

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 505:4 (2021) 4684-4701

Authors:

IY Georgieva, CM Persson, O Barragán, G Nowak, M Fridlund, D Locci, E Palle, R Luque, I Carleo, D Gandolfi, SR Kane, J Korth, KG Stassun, J Livingston, EC Matthews, KA Collins, SB Howell, LM Serrano, S Albrecht, A Bieryla, CE Brasseur, D Ciardi, WD Cochran, KD Colon, IJM Crossfield, Sz Csizmadia, HJ Deeg, M Esposito, E Furlan, T Gan, E Goffo, E Gonzales, S Grziwa, EW Guenther, P Guerra, T Hirano, JM Jenkins, ELN Jensen, P Kabáth, E Knudstrup, KWF Lam, DW Latham, AM Levine, RA Matson, S McDermott, HLM Osborne, M Paegert, SN Quinn, S Redfield, GR Ricker, JE Schlieder, NJ Scott, S Seager, AMS Smith, P Tenenbaum, JD Twicken, R Vanderspek, V Van Eylen, JN Winn
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TOI-220 b: a warm sub-Neptune discovered by TESS

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 505:3 (2021) 3361-3379

Authors:

S Hoyer, D Gandolfi, DJ Armstrong, M Deleuil, L Acuña, JR de Medeiros, E Goffo, J Lillo-Box, E Delgado Mena, TA Lopez, A Santerne, S Sousa, M Fridlund, V Adibekyan, KA Collins, LM Serrano, P Cortés-Zuleta, SB Howell, H Deeg, A Aguichine, O Barragán, EM Bryant, BL Canto Martins, KI Collins, BF Cooke, RF Díaz, M Esposito, E Furlan, S Hojjatpanah, J Jackman, JM Jenkins, ELN Jensen, DW Latham, IC Leão, RA Matson, LD Nielsen, A Osborn, JF Otegi, F Rodler, S Sabotta, NJ Scott, S Seager, C Stockdale, PA Strøm, R Vanderspek, V Van Eylen, PJ Wheatley, JN Winn, JM Almenara, D Barrado, SCC Barros, D Bayliss, F Bouchy, PT Boyd, J Cabrera, WD Cochran, O Demangeon, JP Doty, X Dumusque, P Figueira, W Fong, S Grziwa, AP Hatzes, P Kabáth, E Knudstrup, J Korth, JH Livingston, R Luque, O Mousis, SE Mullally, HP Osborn, E Pallé, CM Persson, S Redfield, NC Santos, J Smith, J Šubjak, JD Twicken, S Udry, DA Yahalomi
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Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843

(2021)

Authors:

Nora L Eisner, Belinda A Nicholson, Oscar Barragán, Suzanne Aigrain, Chris Lintott, Laurel Kaye, Baptiste Klein, Grant Miller, Jake Taylor, Norbert Zicher, Lars A Buchhave, Douglas A Caldwell, Jonti Horner, Joe Llama, Annelies Mortier, Vinesh M Rajpaul, Keivan Stassun, Avi Sporer, Andrew Tkachenko, Jon M Jenkins, David W Latham, George R Ricker, Sara Seager, Joshua N Winn, Safaa Alhassan, Elisabeth ML Baeten, Stewart J Bean, David M Bundy, Vitaly Efremov, Richard Ferstenou, Brian L Goodwin, Michelle Hof, Tony Hoffman, Alexander Hubert, Lily Lau, Sam Lee, David Maetschke, Klaus Peltsch, Cesar Rubio-Alfaro, Gary M Wilson
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Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843

Monthly Notices of the Royal Astronomical Society, Volume 505, Issue 2, August 2021, Pages 1827–1840

Authors:

N L Eisner, B A Nicholson, O Barragán, S Aigrain, C Lintott, L Kaye, B Klein, G Miller, J Taylor, N Zicher, L A Buchhave, D A Caldwell, J Horner, J Llama, A Mortier, V M Rajpaul, K Stassun, A Sporer, A Tkachenko, J M Jenkins, D Latham, G Ricker, S Seager, J Winn, S Alhassan, E M L Baeten, S J Bean, D M Bundy, V Efremov, R Ferstenou, B L Goodwin, M Hof, T Hoffman, A Hubert, L Lau, S Lee, D Maetschke, K Peltsch, C Rubio-Alfaro, G M Wilson

Abstract:

We report on the discovery and validation of a two-planet system around a bright (V = 8.85 mag) early G dwarf (1.43  R⊙, 1.15  M⊙, TOI 2319) using data from NASA’s Transiting Exoplanet Survey Satellite (TESS). Three transit events from two planets were detected by citizen scientists in the month-long TESS light curve (sector 25), as part of the Planet Hunters TESS project. Modelling of the transits yields an orbital period of 11.6264+0.0022−0.0025 d and radius of 3.41+0.14−0.12 R⊕ for the inner planet, and a period in the range 19.26–35 d and a radius of 5.83+0.14−0.14 R⊕ for the outer planet, which was only seen to transit once. Each signal was independently statistically validated, taking into consideration the TESS light curve as well as the ground-based spectroscopic follow-up observations. Radial velocities from HARPS-N and EXPRES yield a tentative detection of planet b, whose mass we estimate to be 11.56+6.58−6.14 M⊕, and allow us to place an upper limit of 27.5 M⊕ (99 per cent confidence) on the mass of planet c. Due to the brightness of the host star and the strong likelihood of an extended H/He atmosphere on both planets, this system offers excellent prospects for atmospheric characterization and comparative planetology.
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