K2-98b: A 32 M⊕ NEPTUNE-SIZE PLANET IN A 10 DAY ORBIT TRANSITING AN F8 STAR

被引：23

作者：

Barragan, Oscar ^{[1
]}

Grziwa, Sascha

Gandolfi, Davide

Fridlund, Malcolm

Endl, Michael

Deeg, Hans J. ^{[2
,3
]}

Cagigal, Manuel P. ^{[14
,15
]}

Lanza, Antonino F.

Moroni, Pier G. Prada ^{[5
,7
,14
,16
]}

Smith, Alexis M. S. ^{[3
,9
,15
]}

Korth, Judith ^{[2
,4
,5
,10
]}

Bedell, Megan ^{[9
,13
,16
]}

Cabrera, Juan ^{[1
,6
,12
,17
]}

Cochran, William D. ^{[11
,13
]}

Cusano, Felice ^{[8
]}

Csizmadia, Szilard ^{[3
,5
,9
,15
]}

Eigmueller, Philipp ^{[4
,6
,7
,8
,17
]}

Erikson, Anders ^{[5
,8
,12
,16
]}

Guenther, Eike W. ^{[2
,7
,8
,10
,14
]}

Hatzes, Artie P. ^{[1
,2
,11
]}

Nespral, David

Paetzold, Martin

Prieto-Arranz, Jorge

Rauer, Heike

机构：

[1] Univ Torino, Dipartimento Fis, Via P Giuria 1, I-10125 Turin, Italy

[2] Univ Cologne, Rhein Inst Umweltforsch, Aachener Str 209, Cologne, Germany

[3] Heidelberg Univ, Zentrum Astron, D-69117 Heidelberg, Germany

[4] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[5] Onsala Space Observ, Chalmers Univ Technol, Dept Earth & Space Sci, S-43992 Onsala, Sweden

[6] Univ Texas, Dept Astron & McDonald Observ, Austin, TX 78712 USA

[7] Inst Astrof sica Canarias, San Cristobal la Laguna 38205, Spain

[8] Univ Laguna, Dept Astrof sica, San Cristobal la Laguna 38206, Spain

[9] Univ Cantabria, Dept Fis Aplicada, E-39005 Santander, Spain

[10] INAF Osservatorio Astrofisico Catania, Via S Sofia 78, Catania, Italy

[11] Univ Pisa, Phys Dept Fermi, Largo B Pontecorvo 3, Pisa, Italy

[12] Ist Nazl Fis Nucl, Largo B Pontecorvo 3, I-12489 Pisa, Italy

[13] Inst Planetary Res, German Aerosp Ctr, Rutherfordstr 2, D-12489 Berlin, Germany

[14] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA

[15] INAF, Osservatorio Astronomico Bologna, Via Ranzani, Bologna, Italy

[16] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany

[17] TU Berlin, Ctr Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany

来源：

ASTRONOMICAL JOURNAL | 2016年 / 152卷 / 06期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

planets and satellites: detection; planets and satellites: individual K2-98b (EPIC 211391664b); stars: fundamental parameters; HOT JUPITERS; SUPER-EARTHS; EXOPLANETS; MASS; CANDIDATES; SPECTROGRAPH; PARAMETERS; BINARIES; SEARCH; TOOL;

D O I：

10.3847/0004-6256/152/6/193

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M-star = 1.074 +/- 0.042 M-circle dot, R-star = 1.311(-0.048)(+0.083) R-circle dot, and age of 5.2(-1.0)(+1.2) Gyr We derive a planetary mass and radius of M-p = 32.2 +/- 8.1 M-circle plus and R-p = 4.3(-0.2)(+0.3) R-circle plus.K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in similar to 3 Gyr, due to the evolution of the latter toward the red giant branch.

引用

页数：9

共 4 条

[1] WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star
Smith, A. M. S.
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ASTRONOMY & ASTROPHYSICS, 2013, 552
[2] K2-31B, A GRAZING TRANSITING HOT JUPITER ON A 1.26-DAY ORBIT AROUND A BRIGHT G7V STAR
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Gandolfi, Davide
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Fridlund, Malcolm
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Montanes-Rodriguez, Pilar
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Sebastian, Daniel
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ASTRONOMICAL JOURNAL, 2016, 152 (05):
[3] Super-Earth of 8 M⊕ in a 2.2-day orbit around the K5V star K2-216
1600, EDP Sciences (618):
[4] Super-Earth of 8 M⊕ in a 2.2-day orbit around the K5V star K2-216
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ASTRONOMY & ASTROPHYSICS, 2018, 618

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