A transiting super-Earth close to the inner edge of the habitable zone of an M0 dwarf star

被引：5

作者：

Diaz Alonso, E. ^{[1
]}

Gonzalez Hernandez, J. I. ^{[2
,3
]}

Toledo-Padron, B. ^{[2
,3
]}

Suarez Gomez, S. L. ^{[4
]}

Suarez Mascareno, A. ^{[5
]}

Aguado, D. S. ^{[2
]}

Gonzalez Gutierrez, C. ^{[1
]}

Cabrera-Lavers, A. ^{[2
,6
]}

Carballido-Landeira, J. ^{[4
]}

Bonavera, L. ^{[4
]}

de Cos Juez, F. J. ^{[1
]}

Rebolo, R. ^{[2
,3
,7
]}

机构：

[1] Univ Oviedo, Dept Exploitat & Explorat Mines, E-33004 Oviedo, Spain

[2] Inst Astrofis Canarias, E-38205 Tenerife, Spain

[3] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[4] Univ Oviedo, Dept Fis, C Federico Garcia Lorca 18, E-33007 Oviedo, Spain

[5] Univ Geneva, Observ Astron, CH-1290 Versoix, Genova, Switzerland

[6] GRANTECAN, Cuesta San Jose S-N, E-38712 Brena Baja, La Palma, Spain

[7] CSIC, E-38712 Madrid, Spain

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 04期

基金：

瑞士国家科学基金会;

关键词：

techniques: photometric; techniques: spectroscopic; planets and satellites: detection; stars: individual: EPIC 249889081; K2-286; stars: low-mass; MAGNETIC ACTIVITY; RADIAL-VELOCITY; PLANET; MASS; ATMOSPHERE; ROTATION; SEARCH;

D O I：

10.1093/mnras/sty3467

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a super-Earth orbiting close to the inner edge of the habitable zone of the cool dwarf star K2-286 (EPIC 249889081), detected with data from the K2 mission in its 15th campaign. The planet has radius of 2.1 +/- 0.2 R-circle plus, near the 1.5-2.0 R-circle plus gap in the radii distribution. The equilibrium temperature is 347(-11)(+21) K, cooler than most of the small planets with wellmeasured masses, and the orbital period is 27.359 +/- 0.005 d. K2-286, located at a distance of 76.3 +/- 0.3 pc, is an M0V star with estimated effective temperature of 3926 +/- 100 K, less active than other M dwarf stars hosting exoplanets. The expected radial velocity semiamplitude induced by the planet on the star is 1.9(-1.2)(+1.3) ms(-1), and the amplitude of signals in transit transmission spectroscopy is estimated at 5.0 +/- 3.0 ppm. Follow-up observations for mass measurements and transit spectroscopy should be desirable for this relatively bright target (m(V) = 12.76, m(Ks) = 9.32) hosting a transiting super-Earth within the inner edge of the habitable zone.

引用

页码：5928 / 5937

页数：10

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