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Author Carleo, I.; Gandolfi, D.; Barragan, O.; Livingston, J.H.; Persson, C.M.; Lam, K.W.F.; Vidotto, A.; Lund, M.B.; D'Angelo, C.V.; Collins, K.A.; Fossati, L.; Howard, A.W.; Kubyshkina, D.; Brahm, R.; Oklopcic, A.; Molliere, P.; Redfield, S.; Serrano, L.M.; Dai, F.; Fridlund, M.; Borsa, F.; Korth, J.; Esposito, M.; Diaz, M.R.; Nielsen, L.D.; Hellier, C.; Mathur, S.; Deeg, H.J.; Hatzes, A.P.; Benatti, S.; Rodler, F.; Alarcon, J.; Spina, L.; Santos, A.R.G.; Georgieva, I.; Garcia, R.A.; Gonzalez-Cuesta, L.; Ricker, G.R.; Vanderspek, R.; Latham, D.W.; Seager, S.; Winn, J.N.; Jenkins, J.M.; Albrecht, S.; Batalha, N.M.; Beard, C.; Boyd, P.T.; Bouchy, F.; Burt, J.A.; Butler, R.P.; Cabrera, J.; Chontos, A.; Ciardi, D.R.; Cochran, W.D.; Collins, K.I.; Crane, J.D.; Crossfield, I.; Csizmadia, S.; Dragomir, D.; Dressing, C.; Eigmuller, P.; Endl, M.; Erikson, A.; Espinoza, N.; Fausnaugh, M.; Feng, F.B.; Flowers, E.; Fulton, B.; Gonzales, E.J.; Grieves, N.; Grziwa, S.; Guenther, E.W.; Guerrero, N.M.; Henning, T.; Hidalgo, D.; Hirano, T.; Hjorth, M.; Huber, D.; Isaacson, H.; Jones, M.; Jordan, A.; Kabath, P.; Kane, S.R.; Knudstrup, E.; Lubin, J.; Luque, R.; Mireles, I.; Narita, N.; Nespral, D.; Niraula, P.; Nowak, G.; Palle, E.; Patzold, M.; Petigura, E.A.; Prieto-Arranz, J.; Rauer, H.; Robertson, P.; Rose, M.E.; Roy, A.; Sarkis, P.; Schlieder, J.E.; Segransan, D.; Shectman, S.; Skarka, M.; Smith, A.M.S.; Smith, J.C.; Stassun, K.; Teske, J.; Twicken, J.D.; Van Eylen, V.; Wang, S.R.; Weiss, L.M.; Wyttenbach, A.
Title The Multiplanet System TOI-421* Type
Year 2020 Publication Astronomical Journal Abbreviated Journal Astron. J.
Volume 160 Issue 3 Pages 23 pp
Keywords
Abstract We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Sectors 5 and 6. We performed ground-based follow-up observations-comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echelle Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution echelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements-and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. We discovered an additional radial velocity signal with a period of five days induced by the presence of a second planet in the system, which we also found to transit its host star. We found that the inner mini-Neptune, TOI-421 b, has an orbital period of P-b = 5.19672 +/- 0.00049 days, a mass of M-b = 7.17 +/- 0.66 M-circle plus, and a radius of R-b = R-circle plus, whereas the outer warm Neptune, TOI-421 c, has a period of P-c = 16.06819 +/- 0.00035 days, a mass of M-c = 16.42(-1.04)(+1.06)M(circle plus), a radius of R-c = 5.09(-0.15)(+0.16)R(circle plus), and a density of rho(c) = 0.685(-0.072)(+0.080) cm(-3). With its characteristics, the outer planet (rho(c) = 0.685(-0.0072)(+0.080) cm(-3)) is placed in the intriguing class of the super-puffy mini-Neptunes. TOI-421 b and TOI-421 c are found to be well-suited for atmospheric characterization. Our atmospheric simulations predict significant Ly alpha transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH4 in the atmosphere of TOI-421 c if equilibrium chemistry is assumed.
Address [Carleo, Ilaria; Redfield, Seth] Wesleyan Univ, Astron Dept, Middletown, CT 06459 USA, Email: icarleo@wesleyan.edu
Corporate Author Thesis
Publisher Iop Publishing Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0004-6256 ISBN Medium
Area Expedition Conference
Notes WOS:000561609000001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1254
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Author Carleo, I.; Malavolta, L.; Desidera, S.; Nardiello, D.; Wang, S.; Turrini, D.; Lanza, A.F.; Baratella, M.; Marzari, F.; Benatti, S.; Biazzo, K.; Bieryla, A.; Brahm, R.; Bonavita, M.; Collins, K.A.; Hellier, C.; Locci, D.; Hobson, M.J.; Maggio, A.; Mantovan, G.; Messina, S.; Pinamonti, M.; Rodriguez, J.E.; Sozzetti, A.; Stassun, K.; Wang, X.Y.; Ziegler, C.; Damasso, M.; Giacobbe, P.; Murgas, F.; Parviainen, H.; Andreuzzi, G.; Barkaoui, K.; Berlind, P.; Bignamini, A.; Borsa, F.; Briceno, C.; Brogi, M.; Cabona, L.; Calkins, M.L.; Capuzzo-Dolcetta, R.; Cecconi, M.; Colon, K.D.; Cosentino, R.; Dragomir, D.; Esquerdo, G.A.; Henning, T.; Ghedina, A.; Goeke, R.F.; Gratton, R.; Horta, F.G.; Gupta, A.F.; Jenkins, J.M.; Jordan, A.; Knapic, C.; Latham, D.W.; Mireles, I.; Law, N.; Lorenzi, V.; Lund, M.B.; Maldonado, J.; Mann, A.W.; Molinari, E.; Palle, E.; Paegert, M.; Pedani, M.; Quinn, S.N.; Scandariato, G.; Seager, S.; Winn, J.N.; Wohler, B.; Zingales, T.
Title The GAPS programme at TNG Type
Year 2024 Publication Astronomy & Astrophysics Abbreviated Journal Astron. Astrophys.
Volume 682 Issue Pages A135
Keywords methods: observational; techniques: photometric; techniques: radial velocities; planets and satellites: detection; planets and satellites: gaseous planets; stars: fundamental parameters
Abstract Context. Different theories have been developed to explain the origins and properties of close-in giant planets, but none of them alone can explain all of the properties of the warm Jupiters (WJs, Porb = 10-200 days). One of the most intriguing characteristics of WJs is that they have a wide range of orbital eccentricities, challenging our understanding of their formation and evolution. Aims. The investigation of these systems is crucial in order to put constraints on formation and evolution theories. TESS is providing a significant sample of transiting WJs around stars bright enough to allow spectroscopic follow-up studies. Methods. We carried out a radial velocity (RV) follow-up study of the TESS candidate TOI-4515 b with the high-resolution spectrograph HARPS-N in the context of the GAPS project, the aim of which is to characterize young giant planets, and the TRES and FEROS spectrographs. We then performed a joint analysis of the HARPS-N, TRES, FEROS, and TESS data in order to fully characterize this planetary system. Results. We find that TOI-4515 b orbits a 1.2 Gyr-old G-star, has an orbital period of Pb = 15.266446 +/- 0.000013 days, a mass of Mb = 2.01 +/- 0.05 MJ, and a radius of Rb = 1.09 +/- 0.04 RJ. We also find an eccentricity of e = 0.46 +/- 0.01, placing this planet among the WJs with highly eccentric orbits. As no additional companion has been detected, this high eccentricity might be the consequence of past violent scattering events.
Address
Corporate Author Thesis
Publisher Place of Publication Editor Data Observatory
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:001164534300004 Approved
Call Number UAI @ alexi.delcanto @ Serial 1961
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Author Hobson, M.J.; Trifonov, T.; Henning, T.; Jordan, A.; Rojas, F.; Espinoza, N.; Brahm, R.; Eberhardt, J.; Jones, M.I.; Mekarnia, D.; Kossakowski, D.; Schlecker, M.; Pinto, M.T.; Miranda, P.J.T.; Abe, L.; Barkaoui, K.; Bendjoya, P.; Bouchy, F.; Buttu, M.; Carleo, I.; Collins, K.A.; Colon, K.D.; Crouzet, N.; Dragomir, D.; Dransfield, G.; Gasparetto, T.; Goeke, R.F.; Guillot, T.; Guenther, M.N.; Howard, S.; Jenkins, J.M.; Korth, J.; Latham, D.W.; Lendl, M.; Lissauer, J.J.; Mann, C.R.; Mireles, I.; Ricker, G.R.; Saesen, S.; Schwarz, R.P.; Seager, S.; Sefako, R.; Shporer, A.; Stockdale, C.; Suarez, O.; Tan, T.G.; Triaud, A.H.M.J.; Ulmer-Moll, S.; Vanderspek, R.; Winn, J.N.; Wohler, B.; Zhou, G.R.
Title Alert Results TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica 41 of 41 TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica Type
Year 2023 Publication Astronomical Journal Abbreviated Journal Astron. J.
Volume 166 Issue 5 Pages 201
Keywords MAGNETIC ACTIVITY; ERROR-CORRECTION; EXOPLANET YIELD; I-ARCHITECTURE; ASTEP 400; MODEL; TELESCOPE; SYSTEMS; JUPITER; CODE
Abstract We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr long transit, PEST, Hazelwood, and LCO; space photometry from NEOSSat; and radial velocities (RVs) from FEROS, HARPS, CORALIE, and CHIRON. Orbiting a late G-type star, TOI-199 b has a 104.854-0.002+0.001day period, a mass of 0.17 +/- 0.02 M J, and a radius of 0.810 +/- 0.005 R J. It is the first warm exo-Saturn with a precisely determined mass and radius. The TESS and ASTEP transits show strong transit timing variations (TTVs), pointing to the existence of a second planet in the system. The joint analysis of the RVs and TTVs provides a unique solution for the nontransiting companion TOI-199 c, which has a period of 273.69-0.22+0.26days and an estimated mass of 0.28-0.01+0.02MJ . This period places it within the conservative habitable zone.
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 0004-6256 ISBN Medium
Area Expedition Conference
Notes WOS:001098090800001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1933
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Author Nowak, G.; Palle, E.; Gandolfi, D.; Deeg, HJ.; Hirano, T.; Barragan, O.; Kuzuhara, M.; Dai, F.; Luque, R.; Persson, CM.; Fridlund, M.; Johnson, MC.; Korth, J.; Livingston, JH.; Grziwa, S.; Mathur, S.; Hatzes, AP.; Prieto-Arranz, J.; Nespral, D.; Hidalgo, D.; Hjorth, M.; Albrecht, S.; Van Eylen, V.; Lam, KWF.; Cochran, WD.; Esposito, M.; Csizmadia, S.; Guenther, EW.; Kabath, P.; Blay, P.; Brahm, R.; Jordan, A.; Espinoza, N.; Rojas, F.; Barris, NC.; Rodler, F.; Sobrino, RA.; Cabrera, J.; Carleo, I.; Chaushev, A.; de Leon, J.; Eigmuller, P.; Endl, M.; Erikson, A.; Fukui, A.; Georgieva, I.; Gonzalez-Cuesta, L.; Knudstrup, E.; Lund, MN.; Rodriguez, PM.; Murgas, F.; Narita, N.; Niraula, P.; Patzold, M.; Rauer, H.; Redfield, S.; Ribas, I.; Skarka, M.; Smith, AMS.; Subjak, J.
Title K2-280 b – a low density warm sub-Saturn around a mildly evolved star Type
Year 2020 Publication MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Abbreviated Journal Mon. Not. Roy. Astron. Soc.
Volume 497 Issue 4 Pages 4423-4435
Keywords techniques: photometric; techniques: radial velocities; techniques: spectroscopic; planets and satellites: detection; stars: individual: (EPIC 216494238, K2-280)
Abstract We present an independent discovery and detailed characterization of K2-280 b, a transiting low density warm sub-Saturn in a 19.9-d moderately eccentric orbit (e = 0.35(-0.04)(+0.05)) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280 b has a radius of R-b = 7.50 +/- 0.44 R-circle plus and a mass of M-b = 37.1 +/- 5.6 M-circle plus, yielding a mean density of rho(b) = 0.48(-0.10)(+0.13) g cm(-3). The host star is a mildly evolved G7 star with an effective temperature of T-eff = 5500 +/- 100 K, a surface gravity of log g(star) = 4.21 +/- 0.05 (cgs), and an iron abundance of [Fe/H] = 0.33 +/- 0.08 dex, and with an inferred mass of M-star = 1.03 +/- 0.03 M-circle dot and a radius of R-star = 1.28 +/- 0.07 R-circle dot. We discuss the importance of K2-280 b for testing formation scenarios of sub-Saturn planets and the current sample of this intriguing group of planets that are absent in the Solar system.
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 0035-8711 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1276
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Author Rodriguez, JE.; Quinn, SN.; Zhou, G.; Vanderburg, A.; Nielsen, LD.; Wittenmyer, RA.; Brahm, R.; Reed, PA.; Huang, CLX.; Vach, S.; Ciardi, DR.; Oelkers, RJ.; Stassun, KG.; Hellier, C.; Gaudi, BS.; Eastman, JD.; Collins, KA.; Bieryla, A.; Christian, S.; Latham, DW.; Carleo, I.; Wright, DJ.; Matthews, E.; Gonzales, EJ.; Ziegler, C.; Dressing, CD.; Howell, SB.; Tan, TG.; Wittrock, J.; Plavchan, P.; McLeod, KK.; Baker, D.; Wang, GV.; Radford, DJ.; Schwarz, RP.; Esposito, M.; Ricker, GR.; Vanderspek, RK.; Seager, S.; Winn, JN.; Jenkins, JM.; Addison, B.; Anderson, DR.; Barclay, T.; Beatty, TG.; Berlind, P.; Bouchy, F.; Bowen, M.; Bowler, BP.; Brasseur, CE.; Briceno, C.; Caldwell, DA.; Calkins, ML.; Cartwright, S.; Chaturvedi, P.; Chaverot, G.; Chimaladinne, S.; Christiansen, JL.; Collins, KI.; Crossfield, IJM.; Eastridge, K.; Espinoza, N.; Esquerdo, GA.; Feliz, DL.; Fenske, T.; Fong, W.; Gan, TJ.; Giacalone, S.; Gill, H.; Gordon, L.; Granados, A.; Grieves, N.; Guenther, EW.; Guerrero, N.; Henning, T.; Henze, CE.; Hesse, K.; Hobson, MJ.; Horner, J.; James, DJ.; Jensen, ELN.; Jimenez, M.; Jordan, A.; Kane, SR.; Kielkopf, J.; Kim, K.; Kuhn, RB.; Latouf, N.; Law, NM.; Levine, AM.; Lund, MB.; Mann, AW.; Mao, SD.; Matson, RA.; Mengel, MW.; Mink, J.; Newman, P.; O'Dwyer, T.; Okumura, J.; Palle, E.; Pepper, J.; Quintana, EV.; Sarkis, P.; Savel, AB.; Schlieder, JE.; Schnaible, C.; Shporer, A.; Sefako, R.; Seidel, JV.; Siverd, RJ.; Skinner, B.; Stalport, M.; Stevens, DJ.; Stibbards, C.; Tinney, CG.; West, RG.; Yahalomi, DA.; Zhang, H.
Title TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images Type
Year 2021 Publication Astronomical Journal Abbreviated Journal Astron. J.
Volume 161 Issue 4 Pages 194
Keywords Exoplanet astronomy; Exoplanet migration; Exoplanet detection methods; Exoplanets; Transits; Radial velocity; Direct imaging
Abstract We present the discovery and characterization of five hot and warm Jupiters-TOI-628 b (TIC 281408474; HD 288842), TOI-640 b (TIC 147977348), TOI-1333 b (TIC 395171208, BD+47 3521A), TOI-1478 b (TIC 409794137), and TOI-1601 b ( TIC 139375960)-based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The five planets were identified from the full-frame images and were confirmed through a series of photometric and spectroscopic follow-up observations by the TESS Follow-up Observing Program Working Group. The planets are all Jovian size (R-P = 1.01-1.77 R-J) and have masses that range from 0.85 to 6.33 M-J. The host stars of these systems have F and G spectral types (5595 <= T-eff <= 6460 K) and are all relatively bright (9.5 < V < 10.8, 8.2 < K < 9.3), making them well suited for future detailed characterization efforts. Three of the systems in our sample (TOI-640 b, TOI-1333 b, and TOI-1601 b) orbit subgiant host stars (log g < 4.1). TOI-640 b is one of only three known hot Jupiters to have a highly inflated radius (R-P > 1.7 R-J, possibly a result of its host star's evolution) and resides on an orbit with a period longer than 5 days. TOI-628 b is the most massive, hot Jupiter discovered to date by TESS with a measured mass of 6.31(-0.30)(+) (0.28) M-J and a statistically significant, nonzero orbital eccentricity of e = 0.074(-0.022)(+) (0.021). This planet would not have had enough time to circularize through tidal forces from our analysis, suggesting that it might be remnant eccentricity from its migration. The longest-period planet in this sample, TOI-1478 b (P = 10.18 days), is a warm Jupiter in a circular orbit around a near-solar analog. NASA's TESS mission is continuing to increase the sample of well-characterized hot and warm Jupiters, complementing its primary mission goals.
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 0004-6256 ISBN Medium
Area Expedition Conference
Notes WOS:000632893600001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1358
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Author Sedaghati, E.; MacDonald, R.J.; Casasayas-Barris, N.; Hoeijmakers, H.J.; Boffin, H.M.J.; Rodler, F.; Brahm, R.; Jones, M.; Sanchez-Lopez, A.; Carleo, I.; Figueira, P.; Mehner, A.; Lopez-Puertas, M.
Title A spectral survey of WASP-19b with ESPRESSO Type
Year 2021 Publication Monthly Notices Of The Royal Astronomical Society Abbreviated Journal Mon. Not. Roy. Astron. Soc.
Volume 505 Issue 1 Pages 435-458
Keywords methods: data analysis; techniques: spectroscopic; planets and satellites: atmospheres; planets and satellites: individual: WASP-19b; stars: activity; stars: individual: WASP-19
Abstract High-resolution precision spectroscopy provides a multitude of robust techniques for probing exoplanetary atmospheres. We present multiple VLT/ESPRESSO transit observations of the hot-Jupiter exoplanet WASP-19b with previously published but disputed atmospheric features from low resolution studies. Through spectral synthesis and modelling of the Rossiter-McLaughlin (RM) effect we calculate stellar, orbital and physical parameters for the system. From narrow-band spectroscopy we do not detect any of Hi, Fei, Mgi, Cai, Nai, and Ki neutral species, placing upper limits on their line contrasts. Through cross-correlation analyses with atmospheric models, we do not detect Fei and place a 3 sigma upper limit of on its mass fraction, from injection and retrieval. We show the inability to detect the presence of H2O for known abundances, owing to lack of strong absorption bands, as well as relatively low S/N ratio. We detect a barely significant peak (3.02 +/- 0.15 sigma) in the cross-correlation map for TiO, consistent with the sub-solar abundance previously reported. This is merely a hint for the presence of TiO and does not constitute a confirmation. However, we do confirm the presence of previously observed enhanced scattering towards blue wavelengths, through chromatic RM measurements, pointing to a hazy atmosphere. We finally present a reanalysis of low-resolution transmission spectra of this exoplanet, concluding that unocculted starspots alone cannot explain previously detected features. Our reanalysis of the FORS2 spectra of WASP-19b finds a similar to 100x sub-solar TiO abundance, precisely constrained to , consistent with the TiO hint from ESPRESSO. We present plausible paths to reconciliation with other seemingly contradicting results.
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 0035-8711 ISBN Medium
Area Expedition Conference
Notes WOS:000671453100031 Approved
Call Number UAI @ alexi.delcanto @ Serial 1438
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