TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations
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KORTH, Judith; Priyanka CHATURVEDI; Hannu PARVIAINEN; Ilaria CARLEO; Michael ENDL; Eike W GUENTHER; Grzegorz NOWAK; Carina M PERSSON; Phillip J MACQUEEN; Alexander J MUSTILL; Juan CABRERA; William D COCHRAN; Jorge LILLO-BOX; David HOBBS; Felipe MURGAS; Michael GREKLEK-MCKEON; Hanna KELLERMANN; Guillaume HEBRARD; Akihiko FUKUI; Enric PALLE; Jon M JENKINS; Joseph D TWICKEN; Karen A COLLINS; Samuel N QUINN; Jan SUBJAK; Paul G BECK; Davide GANDOLFI; Savita MATHUR; Hans J DEEG; David W LATHAM; Simon ALBRECHT; David BARRADO; Isabelle BOISSE; Herve BOUY; Xavier DELFOSSE; Olivier DEMANGEON; Rafael A GARCIA; Artie P HATZES; Neda HEIDARI; Kai IKUTA; Petr KABATH; Heather A KNUTSON; John LIVINGSTON; Eder MARTIOLI; Maria MORALES-CALDERON; Giuseppe MORELLO; Norio NARITA; Jaume ORELL-MIQUEL; Hanna L M OSBORNE; Dinil B PALAKKATHARAPPIL; Viktoria PINTER; Seth REDFIELD; Howard M RELLES; Richard P SCHWARZ; Sara SEAGER; Avi SHPORER; Marek SKARKA; Gregor SRDOC; Monika STANGRET; Luis THOMAS; Van Eylen VINCENT; Noriharu WATANABE a Joshua N WINN
We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2 day orbit located interior to a previously known hot Jupiter, TOI-1408 b (P = 4.42 days, M = 1.86 ± 0.02 MJup, R = 2.4 ± 0.5 RJup) that exhibits grazing transits. The two planets are near 2:1 period commensurability, resulting in significant transit timing variations (TTVs) for both planets and transit duration variations for the inner planet. The TTV amplitude for TOI-1408 c is 15% of the planet's orbital period, marking the largest TTV amplitude relative to the orbital period measured to date. Photodynamical modeling of ground-based radial velocity (RV) observations and transit light curves obtained with the Transiting Exoplanet Survey Satellite and ground-based facilities leads to an inner planet radius of 2.22 ± 0.06 R⊕ and mass of 7.6 ± 0.2 M⊕ that locates the planet into the sub-Neptune regime. The proximity to the 2:1 period commensurability leads to the libration of the resonant argument of the inner planet. The RV measurements support the existence of a third body with an orbital period of several thousand days. This discovery places the system among the rare systems featuring a hot Jupiter accompanied by an inner low-mass planet.
KORTH, Judith; Priyanka CHATURVEDI; Hannu PARVIAINEN; Ilaria CARLEO; Michael ENDL; Eike W GUENTHER; Grzegorz NOWAK; Carina M PERSSON; Phillip J MACQUEEN; Alexander J MUSTILL; Juan CABRERA; William D COCHRAN; Jorge LILLO-BOX; David HOBBS; Felipe MURGAS; Michael GREKLEK-MCKEON; Hanna KELLERMANN; Guillaume HEBRARD; Akihiko FUKUI; Enric PALLE; Jon M JENKINS; Joseph D TWICKEN; Karen A COLLINS; Samuel N QUINN; Jan SUBJAK; Paul G BECK; Davide GANDOLFI; Savita MATHUR; Hans J DEEG; David W LATHAM; Simon ALBRECHT; David BARRADO; Isabelle BOISSE; Herve BOUY; Xavier DELFOSSE; Olivier DEMANGEON; Rafael A GARCIA; Artie P HATZES; Neda HEIDARI; Kai IKUTA; Petr KABATH; Heather A KNUTSON; John LIVINGSTON; Eder MARTIOLI; Maria MORALES-CALDERON; Giuseppe MORELLO; Norio NARITA; Jaume ORELL-MIQUEL; Hanna L M OSBORNE; Dinil B PALAKKATHARAPPIL; Viktoria PINTER; Seth REDFIELD; Howard M RELLES; Richard P SCHWARZ; Sara SEAGER; Avi SHPORER; Marek SKARKA; Gregor SRDOC; Monika STANGRET; Luis THOMAS; Van Eylen VINCENT; Noriharu WATANABE a Joshua N WINN. TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations. Astrophysical Journal Letters. BRISTOL: IOP Publishing Ltd, 2024, roč. 971, č. 2, s. 1-14. ISSN 2041-8205. Dostupné z: https://doi.org/10.3847/2041-8213/ad65fd.
@article{2472978, author = {Korth, Judith and Chaturvedi, Priyanka and Parviainen, Hannu and Carleo, Ilaria and Endl, Michael and Guenther, Eike W and Nowak, Grzegorz and Persson, Carina M and MacQueen, Phillip J and Mustill, Alexander J and Cabrera, Juan and Cochran, William D and LilloandBox, Jorge and Hobbs, David and Murgas, Felipe and GreklekandMcKeon, Michael and Kellermann, Hanna and Hebrard, Guillaume and Fukui, Akihiko and Palle, Enric and Jenkins, Jon M and Twicken, Joseph D and Collins, Karen A and Quinn, Samuel N and Subjak, Jan and Beck, Paul G and Gandolfi, Davide and Mathur, Savita and Deeg, Hans J and Latham, David W and Albrecht, Simon and Barrado, David and Boisse, Isabelle and Bouy, Herve and Delfosse, Xavier and Demangeon, Olivier and Garcia, Rafael A and Hatzes, Artie P and Heidari, Neda and Ikuta, Kai and Kabath, Petr and Knutson, Heather A and Livingston, John and Martioli, Eder and MoralesandCalderon, Maria and Morello, Giuseppe and Narita, Norio and OrellandMiquel, Jaume and Osborne, Hanna L M and Palakkatharappil, Dinil B and Pinter, Viktoria and Redfield, Seth and Relles, Howard M and Schwarz, Richard P and Seager, Sara and Shporer, Avi and Skarka, Marek and Srdoc, Gregor and Stangret, Monika and Thomas, Luis and Vincent, Van Eylen and Watanabe, Noriharu and Winn, Joshua N}, article_location = {BRISTOL}, article_number = {2}, doi = {https://doi.org/10.3847/2041-8213/ad65fd}, keywords = {Exoplanet dynamics; Hot Jupiters; Hot Neptunes; Transit timing variation method; Transit photometry; Radial velocity}, language = {eng}, issn = {2041-8205}, journal = {Astrophysical Journal Letters}, title = {TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations}, url = {https://iopscience.iop.org/article/10.3847/2041-8213/ad65fd}, volume = {971}, year = {2024} }
TY - JOUR ID - 2472978 AU - Korth, Judith - Chaturvedi, Priyanka - Parviainen, Hannu - Carleo, Ilaria - Endl, Michael - Guenther, Eike W - Nowak, Grzegorz - Persson, Carina M - MacQueen, Phillip J - Mustill, Alexander J - Cabrera, Juan - Cochran, William D - Lillo-Box, Jorge - Hobbs, David - Murgas, Felipe - Greklek-McKeon, Michael - Kellermann, Hanna - Hebrard, Guillaume - Fukui, Akihiko - Palle, Enric - Jenkins, Jon M - Twicken, Joseph D - Collins, Karen A - Quinn, Samuel N - Subjak, Jan - Beck, Paul G - Gandolfi, Davide - Mathur, Savita - Deeg, Hans J - Latham, David W - Albrecht, Simon - Barrado, David - Boisse, Isabelle - Bouy, Herve - Delfosse, Xavier - Demangeon, Olivier - Garcia, Rafael A - Hatzes, Artie P - Heidari, Neda - Ikuta, Kai - Kabath, Petr - Knutson, Heather A - Livingston, John - Martioli, Eder - Morales-Calderon, Maria - Morello, Giuseppe - Narita, Norio - Orell-Miquel, Jaume - Osborne, Hanna L M - Palakkatharappil, Dinil B - Pinter, Viktoria - Redfield, Seth - Relles, Howard M - Schwarz, Richard P - Seager, Sara - Shporer, Avi - Skarka, Marek - Srdoc, Gregor - Stangret, Monika - Thomas, Luis - Vincent, Van Eylen - Watanabe, Noriharu - Winn, Joshua N PY - 2024 TI - TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations JF - Astrophysical Journal Letters VL - 971 IS - 2 SP - 1-14 EP - 1-14 PB - IOP Publishing Ltd SN - 20418205 KW - Exoplanet dynamics KW - Hot Jupiters KW - Hot Neptunes KW - Transit timing variation method KW - Transit photometry KW - Radial velocity UR - https://iopscience.iop.org/article/10.3847/2041-8213/ad65fd N2 - We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2 day orbit located interior to a previously known hot Jupiter, TOI-1408 b (P = 4.42 days, M = 1.86 ± 0.02 MJup, R = 2.4 ± 0.5 RJup) that exhibits grazing transits. The two planets are near 2:1 period commensurability, resulting in significant transit timing variations (TTVs) for both planets and transit duration variations for the inner planet. The TTV amplitude for TOI-1408 c is 15% of the planet's orbital period, marking the largest TTV amplitude relative to the orbital period measured to date. Photodynamical modeling of ground-based radial velocity (RV) observations and transit light curves obtained with the Transiting Exoplanet Survey Satellite and ground-based facilities leads to an inner planet radius of 2.22 ± 0.06 R⊕ and mass of 7.6 ± 0.2 M⊕ that locates the planet into the sub-Neptune regime. The proximity to the 2:1 period commensurability leads to the libration of the resonant argument of the inner planet. The RV measurements support the existence of a third body with an orbital period of several thousand days. This discovery places the system among the rare systems featuring a hot Jupiter accompanied by an inner low-mass planet. ER -
KORTH, Judith; Priyanka CHATURVEDI; Hannu PARVIAINEN; Ilaria CARLEO; Michael ENDL; Eike W GUENTHER; Grzegorz NOWAK; Carina M PERSSON; Phillip J MACQUEEN; Alexander J MUSTILL; Juan CABRERA; William D COCHRAN; Jorge LILLO-BOX; David HOBBS; Felipe MURGAS; Michael GREKLEK-MCKEON; Hanna KELLERMANN; Guillaume HEBRARD; Akihiko FUKUI; Enric PALLE; Jon M JENKINS; Joseph D TWICKEN; Karen A COLLINS; Samuel N QUINN; Jan SUBJAK; Paul G BECK; Davide GANDOLFI; Savita MATHUR; Hans J DEEG; David W LATHAM; Simon ALBRECHT; David BARRADO; Isabelle BOISSE; Herve BOUY; Xavier DELFOSSE; Olivier DEMANGEON; Rafael A GARCIA; Artie P HATZES; Neda HEIDARI; Kai IKUTA; Petr KABATH; Heather A KNUTSON; John LIVINGSTON; Eder MARTIOLI; Maria MORALES-CALDERON; Giuseppe MORELLO; Norio NARITA; Jaume ORELL-MIQUEL; Hanna L M OSBORNE; Dinil B PALAKKATHARAPPIL; Viktoria PINTER; Seth REDFIELD; Howard M RELLES; Richard P SCHWARZ; Sara SEAGER; Avi SHPORER; Marek SKARKA; Gregor SRDOC; Monika STANGRET; Luis THOMAS; Van Eylen VINCENT; Noriharu WATANABE a Joshua N WINN. TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations. \textit{Astrophysical Journal Letters}. BRISTOL: IOP Publishing Ltd, 2024, roč.~971, č.~2, s.~1-14. ISSN~2041-8205. Dostupné z: https://doi.org/10.3847/2041-8213/ad65fd.