The Transiting Multi-planet System HD15337: Two Nearly
Equal-mass Planets Straddling the Radius Gap

J 2019

The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap

GANDOLFI, Davide; Luca FOSSATI; John H. LIVINGSTON; Keivan G. STASSUN; Sascha GRZIWA et al.

Základní údaje

Originální název

The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap

Autoři

GANDOLFI, Davide; Luca FOSSATI; John H. LIVINGSTON; Keivan G. STASSUN; Sascha GRZIWA; Oscar BARRAGAN; Malcolm FRIDLUND; Daria KUBYSHKINA; Carina M. PERSSON; Fei DAI; Kristine W. F. LAM; Simon ALBRECHT; Natalie BATALHA; Paul G. BECK; Anders Bo JUSTESEN; Juan CABRERA; Scott CARTWRIGHT; William D. COCHRAN; Szilard CSIZMADIA; Misty D. DAVIES; Hans J. DEEG; Philipp EIGMUELLER; Michael ENDL; Anders ERIKSON; Massimiliano ESPOSITO; Rafael A. GARCIA; Robert GOEKE; Lucia GONZALEZ-CUESTA; Eike W. GUENTHER; Artie P. HATZES; Diego HIDALGO; Teruyuki HIRANO; Maria HJORTH; Petr KABATH; Emil KNUDSTRUP; Judith KORTH; Jie LI; Rafael LUQUE; Savita MATHUR; Rodriguez Pilar MONTANES; Norio NARITA; David NESPRAL; Prajwal NIRAULA; Grzegorz NOWAK; Enric PALLE; Martin PAETZOLD; Jorge PRIETO-ARRANZ; Heike RAUER; Seth REDFIELD; Ignasi RIBAS; Marek SKARKA; Alexis M. S. SMITH; Pamela ROWDEN; Guillermo TORRES; Eylen Vincent VAN a Michael L. VEZIE

Vydání

ASTROPHYSICAL JOURNAL LETTERS, BRISTOL, IOP PUBLISHING LTD, 2019, 2041-8205

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Full Text

Impakt faktor

Impact factor: 8.201

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/19:00111913

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

planetary systems; planets and satellites: detection; planets and satellites: fundamental parameters; planets and satellites: individual (HD15337 b & c); stars: fundamental parameters

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 3. 2020 10:30, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We report the discovery of a super-Earth and a sub-Neptune transiting the star HD 15337 (TOI-402, TIC 120896927), a bright (V = 9) K1 dwarf observed by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 3 and 4. We combine the TESS photometry with archival High Accuracy Radial velocity Planet Searcher spectra to confirm the planetary nature of the transit signals and derive the masses of the two transiting planets. With an orbital period of 4.8 days, a mass of 7.51(-1.01)(+1.09) M-circle plus and a radius of 1.64 +/- 0.06 R-circle plus, HD 15337 b joins the growing group of short-period super-Earths known to have a rocky terrestrial composition. The sub-Neptune HD 15337 c has an orbital period of 17.2 days, a mass of 8.11(-1.69)(+1.82) M-circle plus, and a radius of 2.39 +/- 0.12 R-circle plus, suggesting that the planet might be surrounded by a thick atmospheric envelope. The two planets have similar masses and lie on opposite sides of the radius gap, and are thus an excellent testbed for planet formation and evolution theories. Assuming that HD 15337 c hosts a hydrogen-dominated envelope, we employ a recently developed planet atmospheric evolution algorithm in a Bayesian framework to estimate the history of the high-energy (extreme ultraviolet and X-ray) emission of the host star. We find that at an age of 150 Myr, the star possessed on average between 3.7 and 127 times the high-energy luminosity of the current Sun.

Návaznosti

EF16_027/0008360, projekt VaV

Název: Postdoc@MUNI

Citovat

@article{1596986,
   author = {Gandolfi, Davide and Fossati, Luca and Livingston, John H. and Stassun, Keivan G. and Grziwa, Sascha and Barragan, Oscar and Fridlund, Malcolm and Kubyshkina, Daria and Persson, Carina M. and Dai, Fei and Lam, Kristine W. F. and Albrecht, Simon and Batalha, Natalie and Beck, Paul G. and Justesen, Anders Bo and Cabrera, Juan and Cartwright, Scott and Cochran, William D. and Csizmadia, Szilard and Davies, Misty D. and Deeg, Hans J. and Eigmueller, Philipp and Endl, Michael and Erikson, Anders and Esposito, Massimiliano and Garcia, Rafael A. and Goeke, Robert and GonzalezandCuesta, Lucia and Guenther, Eike W. and Hatzes, Artie P. and Hidalgo, Diego and Hirano, Teruyuki and Hjorth, Maria and Kabath, Petr and Knudstrup, Emil and Korth, Judith and Li, Jie and Luque, Rafael and Mathur, Savita and Montanes, Rodriguez Pilar and Narita, Norio and Nespral, David and Niraula, Prajwal and Nowak, Grzegorz and Palle, Enric and Paetzold, Martin and PrietoandArranz, Jorge and Rauer, Heike and Redfield, Seth and Ribas, Ignasi and Skarka, Marek and Smith, Alexis M. S. and Rowden, Pamela and Torres, Guillermo and Van, Eylen Vincent and Vezie, Michael L.},
   article_location = {BRISTOL},
   article_number = {2},
   doi = {https://doi.org/10.3847/2041-8213/ab17d9},
   keywords = {planetary systems; planets and satellites: detection; planets and satellites: fundamental parameters; planets and satellites: individual (HD15337 b & c); stars: fundamental parameters},
   language = {eng},
   issn = {2041-8205},
   journal = {ASTROPHYSICAL JOURNAL LETTERS},
   title = {The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap},
   url = {https://iopscience.iop.org/article/10.3847/2041-8213/ab17d9/meta},
   volume = {876},
   year = {2019}
}

TY  - JOUR
ID  - 1596986
AU  - Gandolfi, Davide - Fossati, Luca - Livingston, John H. - Stassun, Keivan G. - Grziwa, Sascha - Barragan, Oscar - Fridlund, Malcolm - Kubyshkina, Daria - Persson, Carina M. - Dai, Fei - Lam, Kristine W. F. - Albrecht, Simon - Batalha, Natalie - Beck, Paul G. - Justesen, Anders Bo - Cabrera, Juan - Cartwright, Scott - Cochran, William D. - Csizmadia, Szilard - Davies, Misty D. - Deeg, Hans J. - Eigmueller, Philipp - Endl, Michael - Erikson, Anders - Esposito, Massimiliano - Garcia, Rafael A. - Goeke, Robert - Gonzalez-Cuesta, Lucia - Guenther, Eike W. - Hatzes, Artie P. - Hidalgo, Diego - Hirano, Teruyuki - Hjorth, Maria - Kabath, Petr - Knudstrup, Emil - Korth, Judith - Li, Jie - Luque, Rafael - Mathur, Savita - Montanes, Rodriguez Pilar - Narita, Norio - Nespral, David - Niraula, Prajwal - Nowak, Grzegorz - Palle, Enric - Paetzold, Martin - Prieto-Arranz, Jorge - Rauer, Heike - Redfield, Seth - Ribas, Ignasi - Skarka, Marek - Smith, Alexis M. S. - Rowden, Pamela - Torres, Guillermo - Van, Eylen Vincent - Vezie, Michael L.
PY  - 2019
TI  - The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap
JF  - ASTROPHYSICAL JOURNAL LETTERS
VL  - 876
IS  - 2
SP  - 1-12
EP  - 1-12
PB  - IOP PUBLISHING LTD
SN  - 20418205
KW  - planetary systems
KW  - planets and satellites: detection
KW  - planets and satellites: fundamental parameters
KW  - planets and satellites: individual (HD15337 b &
KW  - c)
KW  - stars: fundamental parameters
UR  - https://iopscience.iop.org/article/10.3847/2041-8213/ab17d9/meta
L2  - https://iopscience.iop.org/article/10.3847/2041-8213/ab17d9/meta
N2  - We report the discovery of a super-Earth and a sub-Neptune transiting the star HD 15337 (TOI-402, TIC 120896927), a bright (V = 9) K1 dwarf observed by the Transiting Exoplanet Survey Satellite (TESS) in Sectors 3 and 4. We combine the TESS photometry with archival High Accuracy Radial velocity Planet Searcher spectra to confirm the planetary nature of the transit signals and derive the masses of the two transiting planets. With an orbital period of 4.8 days, a mass of 7.51(-1.01)(+1.09) M-circle plus and a radius of 1.64 +/- 0.06 R-circle plus, HD 15337 b joins the growing group of short-period super-Earths known to have a rocky terrestrial composition. The sub-Neptune HD 15337 c has an orbital period of 17.2 days, a mass of 8.11(-1.69)(+1.82) M-circle plus, and a radius of 2.39 +/- 0.12 R-circle plus, suggesting that the planet might be surrounded by a thick atmospheric envelope. The two planets have similar masses and lie on opposite sides of the radius gap, and are thus an excellent testbed for planet formation and evolution theories. Assuming that HD 15337 c hosts a hydrogen-dominated envelope, we employ a recently developed planet atmospheric evolution algorithm in a Bayesian framework to estimate the history of the high-energy (extreme ultraviolet and X-ray) emission of the host star. We find that at an age of 150 Myr, the star possessed on average between 3.7 and 127 times the high-energy luminosity of the current Sun.
ER  -

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