K2-280 b - a low density warm sub-Saturn around a mildly evolved star
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NOWAK, Grzegorz; Enric PALLE; Davide GANDOLFI; Hans J. DEEG; Teruyuki HIRANO; Oscar BARRAGAN; Masayuki KUZUHARA; Fei DAI; Rafael LUQUE; Carina M. PERSSON; Malcolm FRIDLUND; Marshall C. JOHNSON; Judith KORTH; John H. LIVINGSTON; Sascha GRZIWA; Savita MATHUR; Artie P. HATZES; Jorge PRIETO-ARRANZ; David NESPRAL; Diego HIDALGO; Maria HJORTH; Simon ALBRECHT; Vincent VAN EYLEN; Kristine W. F. LAM; William D. COCHRAN; Massimiliano ESPOSITO; Szilard CSIZMADIA; Eike W. GUENTHER; Petr KABATH; Pere BLAY; Rafael BRAHM; Andres JORDAN; Nestor ESPINOZA; Felipe ROJAS; Nuria CASASAYAS BARRIS; Florian RODLER; Roi ALONSO SOBRINO; Juan CABRERA; Ilaria CARLEO; Alexander CHAUSHEV; Jerome DE LEON; Philipp EIGMULLER; Michael ENDL; Anders ERIKSON; Akihiko FUKUI; Iskra GEORGIEVA; Lucia GONZALEZ-CUESTA; Emil KNUDSTRUP; Mikkel N. LUND; Pilar Montanes RODRIGUEZ; Felipe MURGAS; Norio NARITA; Prajwal NIRAULA; Martin PATZOLD; Heike RAUER; Seth REDFIELD; Ignasi RIBAS; Marek SKARKA; Alexis M. S. SMITH a Jano SUBJAK
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Monthly Notices of the Royal Astronomical Society, Oxford, Oxford University Press, 2020, 0035-8711
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.
NOWAK, Grzegorz; Enric PALLE; Davide GANDOLFI; Hans J. DEEG; Teruyuki HIRANO; Oscar BARRAGAN; Masayuki KUZUHARA; Fei DAI; Rafael LUQUE; Carina M. PERSSON; Malcolm FRIDLUND; Marshall C. JOHNSON; Judith KORTH; John H. LIVINGSTON; Sascha GRZIWA; Savita MATHUR; Artie P. HATZES; Jorge PRIETO-ARRANZ; David NESPRAL; Diego HIDALGO; Maria HJORTH; Simon ALBRECHT; Vincent VAN EYLEN; Kristine W. F. LAM; William D. COCHRAN; Massimiliano ESPOSITO; Szilard CSIZMADIA; Eike W. GUENTHER; Petr KABATH; Pere BLAY; Rafael BRAHM; Andres JORDAN; Nestor ESPINOZA; Felipe ROJAS; Nuria CASASAYAS BARRIS; Florian RODLER; Roi ALONSO SOBRINO; Juan CABRERA; Ilaria CARLEO; Alexander CHAUSHEV; Jerome DE LEON; Philipp EIGMULLER; Michael ENDL; Anders ERIKSON; Akihiko FUKUI; Iskra GEORGIEVA; Lucia GONZALEZ-CUESTA; Emil KNUDSTRUP; Mikkel N. LUND; Pilar Montanes RODRIGUEZ; Felipe MURGAS; Norio NARITA; Prajwal NIRAULA; Martin PATZOLD; Heike RAUER; Seth REDFIELD; Ignasi RIBAS; Marek SKARKA; Alexis M. S. SMITH a Jano SUBJAK. K2-280 b - a low density warm sub-Saturn around a mildly evolved star. Monthly Notices of the Royal Astronomical Society. Oxford: Oxford University Press, 2020, roč. 497, č. 4, s. 4423-4435. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa2077.
@article{1726397, author = {Nowak, Grzegorz and Palle, Enric and Gandolfi, Davide and Deeg, Hans J. and Hirano, Teruyuki and Barragan, Oscar and Kuzuhara, Masayuki and Dai, Fei and Luque, Rafael and Persson, Carina M. and Fridlund, Malcolm and Johnson, Marshall C. and Korth, Judith and Livingston, John H. and Grziwa, Sascha and Mathur, Savita and Hatzes, Artie P. and PrietoandArranz, Jorge and Nespral, David and Hidalgo, Diego and Hjorth, Maria and Albrecht, Simon and Van Eylen, Vincent and Lam, Kristine W. F. and Cochran, William D. and Esposito, Massimiliano and Csizmadia, Szilard and Guenther, Eike W. and Kabath, Petr and Blay, Pere and Brahm, Rafael and Jordan, Andres and Espinoza, Nestor and Rojas, Felipe and Casasayas Barris, Nuria and Rodler, Florian and Alonso Sobrino, Roi and Cabrera, Juan and Carleo, Ilaria and Chaushev, Alexander and de Leon, Jerome and Eigmuller, Philipp and Endl, Michael and Erikson, Anders and Fukui, Akihiko and Georgieva, Iskra and GonzalezandCuesta, Lucia and Knudstrup, Emil and Lund, Mikkel N. and Rodriguez, Pilar Montanes and Murgas, Felipe and Narita, Norio and Niraula, Prajwal and Patzold, Martin and Rauer, Heike and Redfield, Seth and Ribas, Ignasi and Skarka, Marek and Smith, Alexis M. S. and Subjak, Jano}, article_location = {Oxford}, article_number = {4}, doi = {https://doi.org/10.1093/mnras/staa2077}, keywords = {techniques: photometric; techniques: radial velocities; techniques: spectroscopic; planets and satellites: detection; stars: individual: (EPIC 216494238; K2-280)}, language = {eng}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, title = {K2-280 b - a low density warm sub-Saturn around a mildly evolved star}, url = {https://doi.org/10.1093/mnras/staa2077}, volume = {497}, year = {2020} }
TY - JOUR ID - 1726397 AU - Nowak, Grzegorz - Palle, Enric - Gandolfi, Davide - Deeg, Hans J. - Hirano, Teruyuki - Barragan, Oscar - Kuzuhara, Masayuki - Dai, Fei - Luque, Rafael - Persson, Carina M. - Fridlund, Malcolm - Johnson, Marshall C. - Korth, Judith - Livingston, John H. - Grziwa, Sascha - Mathur, Savita - Hatzes, Artie P. - Prieto-Arranz, Jorge - Nespral, David - Hidalgo, Diego - Hjorth, Maria - Albrecht, Simon - Van Eylen, Vincent - Lam, Kristine W. F. - Cochran, William D. - Esposito, Massimiliano - Csizmadia, Szilard - Guenther, Eike W. - Kabath, Petr - Blay, Pere - Brahm, Rafael - Jordan, Andres - Espinoza, Nestor - Rojas, Felipe - Casasayas Barris, Nuria - Rodler, Florian - Alonso Sobrino, Roi - Cabrera, Juan - Carleo, Ilaria - Chaushev, Alexander - de Leon, Jerome - Eigmuller, Philipp - Endl, Michael - Erikson, Anders - Fukui, Akihiko - Georgieva, Iskra - Gonzalez-Cuesta, Lucia - Knudstrup, Emil - Lund, Mikkel N. - Rodriguez, Pilar Montanes - Murgas, Felipe - Narita, Norio - Niraula, Prajwal - Patzold, Martin - Rauer, Heike - Redfield, Seth - Ribas, Ignasi - Skarka, Marek - Smith, Alexis M. S. - Subjak, Jano PY - 2020 TI - K2-280 b - a low density warm sub-Saturn around a mildly evolved star JF - Monthly Notices of the Royal Astronomical Society VL - 497 IS - 4 SP - 4423-4435 EP - 4423-4435 PB - Oxford University Press SN - 00358711 KW - techniques: photometric KW - techniques: radial velocities KW - techniques: spectroscopic KW - planets and satellites: detection KW - stars: individual: (EPIC 216494238 KW - K2-280) UR - https://doi.org/10.1093/mnras/staa2077 L2 - https://doi.org/10.1093/mnras/staa2077 N2 - 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. ER -
NOWAK, Grzegorz; Enric PALLE; Davide GANDOLFI; Hans J. DEEG; Teruyuki HIRANO; Oscar BARRAGAN; Masayuki KUZUHARA; Fei DAI; Rafael LUQUE; Carina M. PERSSON; Malcolm FRIDLUND; Marshall C. JOHNSON; Judith KORTH; John H. LIVINGSTON; Sascha GRZIWA; Savita MATHUR; Artie P. HATZES; Jorge PRIETO-ARRANZ; David NESPRAL; Diego HIDALGO; Maria HJORTH; Simon ALBRECHT; Vincent VAN EYLEN; Kristine W. F. LAM; William D. COCHRAN; Massimiliano ESPOSITO; Szilard CSIZMADIA; Eike W. GUENTHER; Petr KABATH; Pere BLAY; Rafael BRAHM; Andres JORDAN; Nestor ESPINOZA; Felipe ROJAS; Nuria CASASAYAS BARRIS; Florian RODLER; Roi ALONSO SOBRINO; Juan CABRERA; Ilaria CARLEO; Alexander CHAUSHEV; Jerome DE LEON; Philipp EIGMULLER; Michael ENDL; Anders ERIKSON; Akihiko FUKUI; Iskra GEORGIEVA; Lucia GONZALEZ-CUESTA; Emil KNUDSTRUP; Mikkel N. LUND; Pilar Montanes RODRIGUEZ; Felipe MURGAS; Norio NARITA; Prajwal NIRAULA; Martin PATZOLD; Heike RAUER; Seth REDFIELD; Ignasi RIBAS; Marek SKARKA; Alexis M. S. SMITH a Jano SUBJAK. K2-280 b - a low density warm sub-Saturn around a mildly evolved star. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford: Oxford University Press, 2020, roč.~497, č.~4, s.~4423-4435. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa2077.