|   | 
Details
   web
Records
Author Jenkins, J.S.; Diaz, M.R.; Kurtovic, N.T.; Espinoza, N.; Vines, J.I.; Rojas, P.A.P.; Brahm, R.; Torres, P.; Cortes-Zuleta, P.; Soto, M.G.; Lopez, E.D.; King, G.W.; Wheatley, P.J.; Winn, J.N.; Ciardi, D.R.; Ricker, G.; Vanderspek, R.; Latham, D.W.; Seager, S.; Jenkins, J.M.; Beichman, C.A.; Bieryla, A.; Burke, C.J.; Christiansen, J.L.; Henze, C.E.; Klaus, T.C.; McCauliff, S.; Mori, M.; Narita, N.; Nishiumi, T.; Tamura, M.; de Leon, J.P.; Quinn, S.N.; Villasenor, J.N.; Vezie, M.; Lissauer, J.J.; Collins, K.A.; Collins, K.I.; Isopi, G.; Mallia, F.; Ercolino, A.; Petrovich, C.; Jordan, A.; Acton, J.S.; Armstrong, D.J.; Bayliss, D.; Bouchy, F.; Belardi, C.; Bryant, E.M.; Burleigh, M.R.; Cabrera, J.; Casewell, S.L.; Chaushev, A.; Cooke, B.F.; Eigmuller, P.; Erikson, A.; Foxell, E.; Gansicke, B.T.; Gill, S.; Gillen, E.; Gunther, M.N.; Goad, M.R.; Hooton, M.J.; Jackman, J.A.G.; Louden, T.; McCormac, J.; Moyano, M.; Nielsen, L.D.; Pollacco, D.; Queloz, D.; Rauer, H.; Raynard, L.; Smith, A.M.S.; Tilbrook, R.H.; Titz-Weider, R.; Turner, O.; Udry, S.; Walker, S.R.; Watson, C.A.; West, R.G.; Palle, E.; Ziegler, C.; Law, N.; Mann, A.W.
Title An ultrahot Neptune in the Neptune desert Type
Year 2020 Publication Nature Astronomy Abbreviated Journal Nat. Astron.
Volume 4 Issue 12 Pages 11481157
Keywords PLANETS; ATMOSPHERE; EXOPLANETS; ALGORITHM; EFFICIENT; DWARFS; STARS; TOOL
Abstract About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet(1,2). All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R-circle plus), or apparently rocky planets smaller than 2 R-circle plus. Such lack of planets of intermediate size (the `hot Neptune desert') has been interpreted as the inability of low-mass planets to retain any hydrogen/ helium (H/He) envelope in the face of strong stellar irradiation. Here we report the discovery of an ultrashort-period planet with a radius of 4.6 R-circle plus and a mass of 29 M-circle plus, firmly in the hot Neptune desert. Data from the Transiting Exoplanet Survey Satellite(3) revealed transits of the bright Sun-like star LTT 9779 every 0.79 days. The planet's mean density is similar to that of Neptune, and according to thermal evolution models, it has a H/He-rich envelope constituting 9.0(-2.9)(+2.7) % of the total mass. With an equilibrium temperature around 2,000 K, it is unclear how this `ultrahot Neptune' managed to retain such an envelope. Follow-up observations of the planet's atmosphere to better understand its origin and physical nature will be facilitated by the star's brightness (V-mag = 9.8).
Address [Jenkins, James S.; Diaz, Matias R.; Kurtovic, Nicolas T.; Vines, Jose I.; Rojas, Pablo A. Pena; Cortes-Zuleta, Pia] Univ Chile, Dept Astron, Las Condes, Chile, Email: jjenkins@das.uchile.cl
Corporate Author Thesis
Publisher Nature Research Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2397-3366 ISBN Medium
Area Expedition Conference
Notes WOS:000571722300001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1240
Permanent link to this record
 

 
Author Lendl, M.; Bouchy, F.; Gill, S.; Nielsen, L.D.; Turner, O.; Stassun, K.; Acton, J.S.; Anderson, D.R.; Armstrong, D.J.; Bayliss, D.; Belardi, C.; Bryant, E.M.; Burleigh, M.R.; Chaushev, A.; Casewell, S.L.; Cooke, B.F.; Eigmuller, P.; Gillen, E.; Goad, M.R.; Gunther, M.N.; Hagelberg, J.; Jenkins, J.S.; Louden, T.; Marmier, M.; McCormac, J.; Moyano, M.; Pollacco, D.; Raynard, L.; Tilbrook, R.H.; Udry, S.; Vines, J.I.; West, R.G.; Wheatley, P.J.; Ricker, G.; Vanderspek, R.; Latham, D.W.; Seager, S.; Winn, J.; Jenkins, J.M.; Addison, B.; Briceno, C.; Brahm, R.; Caldwell, D.A.; Doty, J.; Espinoza, N.; Goeke, B.; Henning, T.; Jordan, A.; Krishnamurthy, A.; Law, N.; Morris, R.; Okumura, J.; Mann, A.W.; Rodriguez, J.E.; Sarkis, P.; Schlieder, J.; Twicken, J.D.; Villanueva, S.; Wittenmyer, R.A.; Wright, D.J.; Ziegler, C.
Title TOI-222: a single-transit TESS candidate revealed to be a 34-d eclipsing binary with CORALIE, EulerCam, and NGTS Type
Year 2020 Publication Monthly Notices Of The Royal Astronomical Society Abbreviated Journal Mon. Not. Roy. Astron. Soc.
Volume 492 Issue 2 Pages 1761-1769
Keywords techniques: photometric; stars: individual: TOI-222; planetary systems
Abstract We report the period, eccentricity, and mass determination for the Transiting Exoplanet Survey Satellite (TESS) single-transit event candidate TOI-222, which displayed a single 3000 ppm transit in the TESS 2-min cadence data from Sector 2. We determine the orbital period via radial velocity measurements (P = 33.9 d), which allowed for ground-based photometric detection of two subsequent transits. Our data show that the companion to TOI-222 is a low-mass star, with a radius of 0.18(-0.10)(+0.39) R-circle dot and a mass of 0.23 +/- 0.01 M-circle dot. This discovery showcases the ability to efficiently discover long-period systems from TESS single-transit events using a combination of radial velocity monitoring coupled with high-precision ground-based photometry.
Address [Lendl, Monika; Bouchy, Francois; Nielsen, Louise D.; Turner, Oliver; Hagelberg, Janis; Marmier, Maxime; Udry, Stephane] Univ Geneva, Observ Geneve, 51 Ch Maillettes, CH-1290 Sauverny, Switzerland, Email: monika.lendl@unige.ch
Corporate Author Thesis
Publisher Oxford Univ Press Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0035-8711 ISBN Medium
Area Expedition Conference
Notes WOS:000512297600016 Approved
Call Number UAI @ eduardo.moreno @ Serial 1107
Permanent link to this record
 

 
Author Smith, AMS.; Acton, JS.; Anderson, DR.; Armstrong, DJ.; Bayliss, D.; Belardi, C.; Bouchy, F.; Brahm, R.; Briegal, JT.; Bryant, EM.; Burleigh, MR.; Cabrera, J.; Chaushev, A.; Cooke, BF.; Costes, JC.; Csizmadia, S.; Eigmuller, P.; Erikson, A.; Gill, S.; Gillen, E.; Goad, MR.; Gunther, MN.; Henderson, BA.; Hogan, A.; Jordan, A.; Lendl, M.; McCormac, J.; Moyano, M.; Nielsen, LD.; Rauer, H.; Raynard, L.; Tilbrook, RH.; Turner, O.; Udry, S.; Vines, JI.; Watson, CA.; West, RG.; Wheatley, PJ.
Title NGTS-14Ab: a Neptune-sized transiting planet in the desert Type
Year 2021 Publication Astronomy & Astrophysics Abbreviated Journal Astron. Astrophys.
Volume 646 Issue Pages A183
Keywords planetary systems; planets and satellites: detection; planets and satellites: individual: NGTS-14Ab; binaries: general
Abstract Context. The sub-Jovian, or Neptunian, desert is a previously identified region of parameter space where there is a relative dearth of intermediate-mass planets with short orbital periods.Aims. We present the discovery of a new transiting planetary system within the Neptunian desert, NGTS-14.Methods. Transits of NGTS-14Ab were discovered in photometry from the Next Generation Transit Survey (NGTS). Follow-up transit photometry was conducted from several ground-based facilities, as well as extracted from TESS full-frame images. We combine radial velocities from the HARPS spectrograph with the photometry in a global analysis to determine the system parameters.Results. NGTS-14Ab has a radius that is about 30 per cent larger than that of Neptune (0.444 +/- 0.030 R-Jup) and is around 70 per cent more massive than Neptune (0.092 +/- 0.012 M-Jup). It transits the main-sequence K1 star, NGTS-14A, with a period of 3.54 days, just far away enough to have maintained at least some of its primordial atmosphere. We have also identified a possible long-period stellar mass companion to the system, NGTS-14B, and we investigate the binarity of exoplanet host stars inside and outside the Neptunian desert using Gaia.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0004-6361 ISBN Medium
Area Expedition Conference
Notes WOS:000624671800002 Approved
Call Number UAI @ alexi.delcanto @ Serial 1352
Permanent link to this record