| CARLEO, Ilaria, Davide GANDOLFI, Oscar BARRAGAN, John H. LIVINGSTON, Carina M. PERSSON, Kristine W. F. LAM, Aline VIDOTTO, Michael B. LUND, Carolina Villarr D'ANGELO, Karen A. COLLINS, Luca FOSSATI, Andrew W. HOWARD, Daria KUBYSHKINA, Rafael BRAHM, Antonija OKLOPCIC, Paul MOLLIERE, Seth REDFIELD, Luisa Maria SERRANO, Fei DAI, Malcolm FRIDLUND, Francesco BORSA, Judith KORTH, Massimiliano ESPOSITO, Matias R. DIAZ, Louise Dyregaard NIELSEN, Coel HELLIER, Savita MATHUR, Hans J. DEEG, Artie P. HATZES, Serena BENATTI, Florian RODLER, Javier ALARCON, Lorenzo SPINA, Angela R. G. SANTOS, Iskra GEORGIEVA, Rafael A. GARCIA, Lucia GONZALEZ-CUESTA, George R. RICKER, Roland VANDERSPEK, David W. LATHAM, Sara SEAGER, Joshua N. WINN, Jon M. JENKINS, Simon ALBRECHT, Natalie M. BATALHA, Corey BEARD, Patricia T. BOYD, Francois BOUCHY, Jennifer A. BURT, R. Paul BUTLER, Juan CABRERA, Ashley CHONTOS, David R. CIARDI, William D. COCHRAN, Kevin I. COLLINS, Jeffrey D. CRANE, Ian CROSSFIELD, Szilard CSIZMADIA, Diana DRAGOMIR, Courtney DRESSING, Philipp EIGMULLER, Michael ENDL, Anders ERIKSON, Nestor ESPINOZA, Michael FAUSNAUGH, Fabo FENG, Erin FLOWERS, Benjamin FULTON, Erica J. GONZALES, Nolan GRIEVES, Sascha GRZIWA, Eike W. GUENTHER, Natalia M. GUERRERO, Thomas HENNING, Diego HIDALGO, Teruyuki HIRANO, Maria HJORTH, Daniel HUBER, Howard ISAACSON, Matias JONES, Andres JORDAN, Petr KABATH, Stephen R. KANE, Emil KNUDSTRUP, Jack LUBIN, Rafael LUQUE, Ismael MIRELES, Norio NARITA, David NESPRAL, Prajwal NIRAULA, Grzegorz NOWAK, Enric PALLE, Martin PATZOLD, Erik A. PETIGURA, Jorge PRIETO-ARRANZ, Heike RAUER, Paul ROBERTSON, Mark E. ROSE, Arpita ROY, Paula SARKIS, Joshua E. SCHLIEDER, Damien SEGRANSAN, Stephen SHECTMAN, Marek SKARKA, Alexis M. S. SMITH, Jeffrey C. SMITH, Keivan STASSUN, Johanna TESKE, Joseph D. TWICKEN, Vincent VAN EYLEN, Sharon WANG, Lauren M. WEISS a Aurelien WYTTENBACH. The Multiplanet System TOI-421: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary. Astronomical Journal. Bristol: IOP Publishing Ltd., 2020, roč. 160, č. 3, s. 1-23. ISSN 0004-6256. Dostupné z: https://dx.doi.org/10.3847/1538-3881/aba124. |
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@article{1731577,
author = {Carleo, Ilaria and Gandolfi, Davide and Barragan, Oscar and Livingston, John H. and Persson, Carina M. and Lam, Kristine W. F. and Vidotto, Aline and Lund, Michael B. and D'Angelo, Carolina Villarr and Collins, Karen A. and Fossati, Luca and Howard, Andrew W. and Kubyshkina, Daria and Brahm, Rafael and Oklopcic, Antonija and Molliere, Paul and Redfield, Seth and Serrano, Luisa Maria and Dai, Fei and Fridlund, Malcolm and Borsa, Francesco and Korth, Judith and Esposito, Massimiliano and Diaz, Matias R. and Nielsen, Louise Dyregaard and Hellier, Coel and Mathur, Savita and Deeg, Hans J. and Hatzes, Artie P. and Benatti, Serena and Rodler, Florian and Alarcon, Javier and Spina, Lorenzo and Santos, Angela R. G. and Georgieva, Iskra and Garcia, Rafael A. and GonzalezandCuesta, Lucia and Ricker, George R. and Vanderspek, Roland and Latham, David W. and Seager, Sara and Winn, Joshua N. and Jenkins, Jon M. and Albrecht, Simon and Batalha, Natalie M. and Beard, Corey and Boyd, Patricia T. and Bouchy, Francois and Burt, Jennifer A. and Butler, R. Paul and Cabrera, Juan and Chontos, Ashley and Ciardi, David R. and Cochran, William D. and Collins, Kevin I. and Crane, Jeffrey D. and Crossfield, Ian and Csizmadia, Szilard and Dragomir, Diana and Dressing, Courtney and Eigmuller, Philipp and Endl, Michael and Erikson, Anders and Espinoza, Nestor and Fausnaugh, Michael and Feng, Fabo and Flowers, Erin and Fulton, Benjamin and Gonzales, Erica J. and Grieves, Nolan and Grziwa, Sascha and Guenther, Eike W. and Guerrero, Natalia M. and Henning, Thomas and Hidalgo, Diego and Hirano, Teruyuki and Hjorth, Maria and Huber, Daniel and Isaacson, Howard and Jones, Matias and Jordan, Andres and Kabath, Petr and Kane, Stephen R. and Knudstrup, Emil and Lubin, Jack and Luque, Rafael and Mireles, Ismael and Narita, Norio and Nespral, David and Niraula, Prajwal and Nowak, Grzegorz and Palle, Enric and Patzold, Martin and Petigura, Erik A. and PrietoandArranz, Jorge and Rauer, Heike and Robertson, Paul and Rose, Mark E. and Roy, Arpita and Sarkis, Paula and Schlieder, Joshua E. and Segransan, Damien and Shectman, Stephen and Skarka, Marek and Smith, Alexis M. S. and Smith, Jeffrey C. and Stassun, Keivan and Teske, Johanna and Twicken, Joseph D. and Van Eylen, Vincent and Wang, Sharon and Weiss, Lauren M. and Wyttenbach, Aurelien},
article_location = {Bristol},
article_number = {3},
doi = {http://dx.doi.org/10.3847/1538-3881/aba124},
keywords = {Exoplanet astronomy; Exoplanet systems; Exoplanets; Mini Neptunes; Hot Neptunes; Fundamental parameters of stars; High resolution spectroscopy; Transit photometry; Radial velocity},
language = {eng},
issn = {0004-6256},
journal = {Astronomical Journal},
title = {The Multiplanet System TOI-421: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary},
url = {https://doi.org/10.3847/1538-3881/aba124},
volume = {160},
year = {2020}
}
TY - JOUR
ID - 1731577
AU - Carleo, Ilaria - Gandolfi, Davide - Barragan, Oscar - Livingston, John H. - Persson, Carina M. - Lam, Kristine W. F. - Vidotto, Aline - Lund, Michael B. - D'Angelo, Carolina Villarr - Collins, Karen A. - Fossati, Luca - Howard, Andrew W. - Kubyshkina, Daria - Brahm, Rafael - Oklopcic, Antonija - Molliere, Paul - Redfield, Seth - Serrano, Luisa Maria - Dai, Fei - Fridlund, Malcolm - Borsa, Francesco - Korth, Judith - Esposito, Massimiliano - Diaz, Matias R. - Nielsen, Louise Dyregaard - Hellier, Coel - Mathur, Savita - Deeg, Hans J. - Hatzes, Artie P. - Benatti, Serena - Rodler, Florian - Alarcon, Javier - Spina, Lorenzo - Santos, Angela R. G. - Georgieva, Iskra - Garcia, Rafael A. - Gonzalez-Cuesta, Lucia - Ricker, George R. - Vanderspek, Roland - Latham, David W. - Seager, Sara - Winn, Joshua N. - Jenkins, Jon M. - Albrecht, Simon - Batalha, Natalie M. - Beard, Corey - Boyd, Patricia T. - Bouchy, Francois - Burt, Jennifer A. - Butler, R. Paul - Cabrera, Juan - Chontos, Ashley - Ciardi, David R. - Cochran, William D. - Collins, Kevin I. - Crane, Jeffrey D. - Crossfield, Ian - Csizmadia, Szilard - Dragomir, Diana - Dressing, Courtney - Eigmuller, Philipp - Endl, Michael - Erikson, Anders - Espinoza, Nestor - Fausnaugh, Michael - Feng, Fabo - Flowers, Erin - Fulton, Benjamin - Gonzales, Erica J. - Grieves, Nolan - Grziwa, Sascha - Guenther, Eike W. - Guerrero, Natalia M. - Henning, Thomas - Hidalgo, Diego - Hirano, Teruyuki - Hjorth, Maria - Huber, Daniel - Isaacson, Howard - Jones, Matias - Jordan, Andres - Kabath, Petr - Kane, Stephen R. - Knudstrup, Emil - Lubin, Jack - Luque, Rafael - Mireles, Ismael - Narita, Norio - Nespral, David - Niraula, Prajwal - Nowak, Grzegorz - Palle, Enric - Patzold, Martin - Petigura, Erik A. - Prieto-Arranz, Jorge - Rauer, Heike - Robertson, Paul - Rose, Mark E. - Roy, Arpita - Sarkis, Paula - Schlieder, Joshua E. - Segransan, Damien - Shectman, Stephen - Skarka, Marek - Smith, Alexis M. S. - Smith, Jeffrey C. - Stassun, Keivan - Teske, Johanna - Twicken, Joseph D. - Van Eylen, Vincent - Wang, Sharon - Weiss, Lauren M. - Wyttenbach, Aurelien
PY - 2020
TI - The Multiplanet System TOI-421: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary
JF - Astronomical Journal
VL - 160
IS - 3
SP - 1-23
EP - 1-23
PB - IOP Publishing Ltd.
SN - 00046256
KW - Exoplanet astronomy
KW - Exoplanet systems
KW - Exoplanets
KW - Mini Neptunes
KW - Hot Neptunes
KW - Fundamental parameters of stars
KW - High resolution spectroscopy
KW - Transit photometry
KW - Radial velocity
UR - https://doi.org/10.3847/1538-3881/aba124
L2 - https://doi.org/10.3847/1538-3881/aba124
N2 - 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.
ER -
CARLEO, Ilaria, Davide GANDOLFI, Oscar BARRAGAN, John H. LIVINGSTON, Carina M. PERSSON, Kristine W. F. LAM, Aline VIDOTTO, Michael B. LUND, Carolina Villarr D'ANGELO, Karen A. COLLINS, Luca FOSSATI, Andrew W. HOWARD, Daria KUBYSHKINA, Rafael BRAHM, Antonija OKLOPCIC, Paul MOLLIERE, Seth REDFIELD, Luisa Maria SERRANO, Fei DAI, Malcolm FRIDLUND, Francesco BORSA, Judith KORTH, Massimiliano ESPOSITO, Matias R. DIAZ, Louise Dyregaard NIELSEN, Coel HELLIER, Savita MATHUR, Hans J. DEEG, Artie P. HATZES, Serena BENATTI, Florian RODLER, Javier ALARCON, Lorenzo SPINA, Angela R. G. SANTOS, Iskra GEORGIEVA, Rafael A. GARCIA, Lucia GONZALEZ-CUESTA, George R. RICKER, Roland VANDERSPEK, David W. LATHAM, Sara SEAGER, Joshua N. WINN, Jon M. JENKINS, Simon ALBRECHT, Natalie M. BATALHA, Corey BEARD, Patricia T. BOYD, Francois BOUCHY, Jennifer A. BURT, R. Paul BUTLER, Juan CABRERA, Ashley CHONTOS, David R. CIARDI, William D. COCHRAN, Kevin I. COLLINS, Jeffrey D. CRANE, Ian CROSSFIELD, Szilard CSIZMADIA, Diana DRAGOMIR, Courtney DRESSING, Philipp EIGMULLER, Michael ENDL, Anders ERIKSON, Nestor ESPINOZA, Michael FAUSNAUGH, Fabo FENG, Erin FLOWERS, Benjamin FULTON, Erica J. GONZALES, Nolan GRIEVES, Sascha GRZIWA, Eike W. GUENTHER, Natalia M. GUERRERO, Thomas HENNING, Diego HIDALGO, Teruyuki HIRANO, Maria HJORTH, Daniel HUBER, Howard ISAACSON, Matias JONES, Andres JORDAN, Petr KABATH, Stephen R. KANE, Emil KNUDSTRUP, Jack LUBIN, Rafael LUQUE, Ismael MIRELES, Norio NARITA, David NESPRAL, Prajwal NIRAULA, Grzegorz NOWAK, Enric PALLE, Martin PATZOLD, Erik A. PETIGURA, Jorge PRIETO-ARRANZ, Heike RAUER, Paul ROBERTSON, Mark E. ROSE, Arpita ROY, Paula SARKIS, Joshua E. SCHLIEDER, Damien SEGRANSAN, Stephen SHECTMAN, Marek SKARKA, Alexis M. S. SMITH, Jeffrey C. SMITH, Keivan STASSUN, Johanna TESKE, Joseph D. TWICKEN, Vincent VAN EYLEN, Sharon WANG, Lauren M. WEISS a Aurelien WYTTENBACH. The Multiplanet System TOI-421: A Warm Neptune and a Super Puffy Mini-Neptune Transiting a G9 V Star in a Visual Binary. \textit{Astronomical Journal}. Bristol: IOP Publishing Ltd., 2020, roč.~160, č.~3, s.~1-23. ISSN~0004-6256. Dostupné z: https://dx.doi.org/10.3847/1538-3881/aba124.
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