Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31642
DC Field | Value | Language |
---|---|---|
dc.contributor.author | CARLEO, Ilaria | en_US |
dc.contributor.author | Gandolfi, Davide | en_US |
dc.contributor.author | Barragán, Oscar | en_US |
dc.contributor.author | Livingston, John H. | en_US |
dc.contributor.author | Persson, Carina M. | en_US |
dc.contributor.author | Lam, Kristine W. F. | en_US |
dc.contributor.author | Vidotto, Aline | en_US |
dc.contributor.author | Lund, Michael B. | en_US |
dc.contributor.author | Villarreal D'Angelo, Carolina | en_US |
dc.contributor.author | Collins, Karen A. | en_US |
dc.contributor.author | Fossati, Luca | en_US |
dc.contributor.author | Schlieder, Joshua E. | en_US |
dc.contributor.author | Ségransan, Damien | en_US |
dc.contributor.author | Shectman, Stephen | en_US |
dc.contributor.author | Skarka, Marek | en_US |
dc.contributor.author | Smith, Alexis M. S. | en_US |
dc.contributor.author | Smith, Jeffrey C. | en_US |
dc.contributor.author | Stassun, Keivan | en_US |
dc.contributor.author | Teske, Johanna | en_US |
dc.contributor.author | Twicken, Joseph D. | en_US |
dc.contributor.author | Van Eylen, Vincent | en_US |
dc.contributor.author | Howard, Andrew W. | en_US |
dc.contributor.author | Wang, Sharon | en_US |
dc.contributor.author | Weiss, Lauren M. | en_US |
dc.contributor.author | Wyttenbach, Aurélien | en_US |
dc.contributor.author | Kubyshkina, Daria | en_US |
dc.contributor.author | Brahm, Rafael | en_US |
dc.contributor.author | Oklopčić, Antonija | en_US |
dc.contributor.author | Mollière, Paul | en_US |
dc.contributor.author | Redfield, Seth | en_US |
dc.contributor.author | Serrano, Luisa Maria | en_US |
dc.contributor.author | Dai, Fei | en_US |
dc.contributor.author | Fridlund, Malcolm | en_US |
dc.contributor.author | BORSA, Francesco | en_US |
dc.contributor.author | Korth, Judith | en_US |
dc.contributor.author | Esposito, Massimiliano | en_US |
dc.contributor.author | Díaz, Matías R. | en_US |
dc.contributor.author | Dyregaard Nielsen, Louise | en_US |
dc.contributor.author | Hellier, Coel | en_US |
dc.contributor.author | Mathur, Savita | en_US |
dc.contributor.author | Deeg, Hans J. | en_US |
dc.contributor.author | Hatzes, Artie P. | en_US |
dc.contributor.author | BENATTI, SERENA | en_US |
dc.contributor.author | Rodler, Florian | en_US |
dc.contributor.author | Alarcon, Javier | en_US |
dc.contributor.author | SPINA, LORENZO | en_US |
dc.contributor.author | Santos, Ângela R. G. | en_US |
dc.contributor.author | Georgieva, Iskra | en_US |
dc.contributor.author | García, Rafael A. | en_US |
dc.contributor.author | González-Cuesta, Lucía | en_US |
dc.contributor.author | Ricker, George R. | en_US |
dc.contributor.author | Vanderspek, Roland | en_US |
dc.contributor.author | Latham, David W. | en_US |
dc.contributor.author | Seager, Sara | en_US |
dc.contributor.author | Winn, Joshua N. | en_US |
dc.contributor.author | Jenkins, Jon M. | en_US |
dc.contributor.author | Albrecht, Simon | en_US |
dc.contributor.author | Batalha, Natalie M. | en_US |
dc.contributor.author | Beard, Corey | en_US |
dc.contributor.author | Boyd, Patricia T. | en_US |
dc.contributor.author | Bouchy, François | en_US |
dc.contributor.author | Burt, Jennifer A. | en_US |
dc.contributor.author | Butler, R. Paul | en_US |
dc.contributor.author | Cabrera, Juan | en_US |
dc.contributor.author | Chontos, Ashley | en_US |
dc.contributor.author | Ciardi, David R. | en_US |
dc.contributor.author | Cochran, William D. | en_US |
dc.contributor.author | Collins, Kevin I. | en_US |
dc.contributor.author | Crane, Jeffrey D. | en_US |
dc.contributor.author | Crossfield, Ian | en_US |
dc.contributor.author | Csizmadia, Szilard | en_US |
dc.contributor.author | Dragomir, Diana | en_US |
dc.contributor.author | Dressing, Courtney | en_US |
dc.contributor.author | Eigmüller, Philipp | en_US |
dc.contributor.author | Endl, Michael | en_US |
dc.contributor.author | Erikson, Anders | en_US |
dc.contributor.author | Espinoza, Nestor | en_US |
dc.contributor.author | Fausnaugh, Michael | en_US |
dc.contributor.author | Feng, Fabo | en_US |
dc.contributor.author | Flowers, Erin | en_US |
dc.contributor.author | Fulton, Benjamin | en_US |
dc.contributor.author | Gonzales, Erica J. | en_US |
dc.contributor.author | Grieves, Nolan | en_US |
dc.contributor.author | Grziwa, Sascha | en_US |
dc.contributor.author | Guenther, Eike W. | en_US |
dc.contributor.author | Guerrero, Natalia M. | en_US |
dc.contributor.author | Henning, Thomas | en_US |
dc.contributor.author | Hidalgo, Diego | en_US |
dc.contributor.author | Hirano, Teruyuki | en_US |
dc.contributor.author | Hjorth, Maria | en_US |
dc.contributor.author | Huber, Daniel | en_US |
dc.contributor.author | Isaacson, Howard | en_US |
dc.contributor.author | Jones, Matias | en_US |
dc.contributor.author | Jordán, Andrés | en_US |
dc.contributor.author | Kabáth, Petr | en_US |
dc.contributor.author | Kane, Stephen R. | en_US |
dc.contributor.author | Knudstrup, Emil | en_US |
dc.contributor.author | Lubin, Jack | en_US |
dc.contributor.author | Luque, Rafael | en_US |
dc.contributor.author | Mireles, Ismael | en_US |
dc.contributor.author | Narita, Norio | en_US |
dc.contributor.author | Nespral, David | en_US |
dc.contributor.author | Niraula, Prajwal | en_US |
dc.contributor.author | Nowak, Grzegorz | en_US |
dc.contributor.author | Palle, Enric | en_US |
dc.contributor.author | Pätzold, Martin | en_US |
dc.contributor.author | Petigura, Erik A. | en_US |
dc.contributor.author | Prieto-Arranz, Jorge | en_US |
dc.contributor.author | Rauer, Heike | en_US |
dc.contributor.author | Robertson, Paul | en_US |
dc.contributor.author | Rose, Mark E. | en_US |
dc.contributor.author | Roy, Arpita | en_US |
dc.contributor.author | Sarkis, Paula | en_US |
dc.date.accessioned | 2022-03-17T10:17:33Z | - |
dc.date.available | 2022-03-17T10:17:33Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0004-6256 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31642 | - |
dc.description.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 Echellé Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution Échelle 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<SUB>b</SUB> = 5.19672 ± 0.00049 days, a mass of M<SUB>b</SUB> = 7.17 ± 0.66 M<SUB>⊕</SUB>, and a radius of R<SUB>b</SUB> = ${2.68}_{-0.18}^{+0.19}$ R<SUB>⊕</SUB>, whereas the outer warm Neptune, TOI-421 c, has a period of P<SUB>c</SUB> = 16.06819 ± 0.00035 days, a mass of M<SUB>c</SUB> = ${16.42}_{-1.04}^{+1.06}$ M<SUB>⊕</SUB>, a radius of R<SUB>c</SUB> = ${5.09}_{-0.15}^{+0.16}$ R<SUB>⊕</SUB>, and a density of ρ<SUB>c</SUB> = ${0.685}_{-0.072}^{+0.080}$ g cm<SUP>-3</SUP>. With its characteristics, the outer planet (ρ<SUB>c</SUB> = ${0.685}_{-0.072}^{+0.080}$ g cm<SUP>-3</SUP>) 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 Lyα transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH<SUB>4</SUB> in the atmosphere of TOI-421 c if equilibrium chemistry is assumed. <SUP>*</SUP> Based on observations made with ESO Telescopes at the La Silla Observatory under programs ID 1102.C-0923, 0103.C-0874, 0103.C-0759, 0103.C-0442, and 60.A-970. Based on observations obtained with the Nordic Optical Telescope (NOT), operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos (ORM) of the Instituto de Astrofísica de Canarias (IAC). This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. This work makes use of observations from the LCOGT network. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Multiplanet System TOI-421: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary* | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-3881/aba124 | en_US |
dc.identifier.scopus | 2-s2.0-85093505241 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-3881/aba124 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85093505241 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 160 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 114 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTRONOMICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020AJ....160..114C | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0002-0810-3747 | - |
crisitem.author.orcid | 0000-0003-4830-0590 | - |
crisitem.author.orcid | 0000-0002-4638-3495 | - |
crisitem.author.orcid | 0000-0002-9760-6249 | - |
crisitem.journal.journalissn | 0004-6256 | - |
crisitem.journal.ance | E016224 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2004.10095.pdf | preprint | 4.7 MB | Adobe PDF | View/Open |
Carleo_2020_AJ_160_114.pdf | [Administrators only] | 10.14 MB | Adobe PDF |
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