Transit timing variation and transmission spectroscopy analyses of the hot Neptune GJ3470b

被引：33

作者：

Awiphan, S. ^{[1
]}

Kerins, E. ^{[1
]}

Pichadee, S. ^{[2
]}

Komonjinda, S. ^{[2
]}

Dhillon, V. S. ^{[3
,4
]}

Rujopakarn, W. ^{[5
,6
]}

Poshyachinda, S. ^{[7
]}

Marsh, T. R. ^{[8
]}

Reichart, D. E. ^{[9
]}

Ivarsen, K. M. ^{[9
]}

Haislip, J. B. ^{[9
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England

[2] Chiang Mai Univ, Dept Phys & Mat Sci, Fac Sci, Chiang Mai 50200, Thailand

[3] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

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

[5] Chulalongkorn Univ, Dept Phys, Fac Sci, 254 Phayathai Rd, Bangkok 10330, Thailand

[6] Univ Tokyo, Univ Tokyo Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[7] Natl Astron Res Inst Thailand, 191 Siriphanich Bldg,Huay Kaew Rd, Chiang Mai 50200, Thailand

[8] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[9] Univ North Carolina Chapel Hill, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 463卷 / 03期

基金：

美国国家科学基金会;

关键词：

techniques: photometric; eclipses; planets and satellites: atmospheres; planets and satellites: individual: GJ 3470b; stars: late-type; planetary systems; MULTIPLE-PLANET SYSTEMS; LOW-DENSITY PLANETS; EXOPLANET GJ 1214B; LOW-MASS STARS; EMISSION-SPECTRUM; SUPER-EARTHS; M DWARF; ATMOSPHERE; CONFIRMATION; PHOTOMETRY;

D O I：

10.1093/mnras/stw2148

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

GJ3470b is a hot Neptune exoplanet orbiting an M dwarf and the first sub-Jovian planet to exhibit Rayleigh scattering. We present transit timing variation (TTV) and transmission spectroscopy analyses of multiwavelength optical photometry from 2.4-m and 0.5-m telescopes at the Thai National Observatory, and the 0.6-m PROMPT-8 telescope in Chile. Our TTV analysis allows us to place an upper mass limit for a second planet in the system. The presence of a hot Jupiter with a period of less than 10 d or a planet with an orbital period between 2.5 and 4.0 d are excluded. Combined optical and near-infrared transmission spectroscopy favour an H/He-dominated haze (mean molecular weight 1.08 +/- 0.20) with high particle abundance at high altitude. We also argue that previous near-infrared data favour the presence of methane in the atmosphere of GJ3470b.

引用

页码：2574 / 2582

页数：9

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