Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry

	Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry
	Ciceri, S.1; Mancini, L.1,2; Southworth, J.3; Lendl, M.4,5; Tregloan-Reed, J.3,6; Brahm, R.7,8; Chen, G.9,10; D'Ago, G.11,12,13; Dominik, M.14; Jaimes, R. Figuera 13,15
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-02-11
卷号	456 期号:1 页码:990-1002
关键词	planets and satellites: fundamental parameters stars: fundamental parameters stars: individual: WASP-45 stars: individual: WASP-46
ISSN号	0035-8711
通讯作者	Ciceri, S (reprint author), Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.
产权排序	第二十九完成单位
英文摘要	Accurate measurements of the physical characteristics of a large number of exoplanets are useful to strongly constrain theoretical models of planet formation and evolution, which lead to the large variety of exoplanets and planetary-system configurations that have been observed. We present a study of the planetary systems WASP-45 and WASP-46, both composed of a main-sequence star and a close-in hot Jupiter, based on 29 new high-quality light curves of transits events. In particular, one transit of WASP-45 b and four of WASP-46 b were simultaneously observed in four optical filters, while one transit of WASP-46 b was observed with the NTT obtaining a precision of 0.30 mmag with a cadence of roughly 3 min. We also obtained five new spectra of WASP-45 with the FEROS spectrograph. We improved by a factor of 4 the measurement of the radius of the planet WASP-45 b, and found that WASP-46 b is slightly less massive and smaller than previously reported. Both planets now have a more accurate measurement of the density (0.959 +/- 0.077 rho Jup instead of 0.64 +/- 0.30 rho Jup for WASP-45 b, and 1.103 +/- 0.052 rho Jup instead of 0.94 +/- 0.11 rho Jup for WASP-46 b). We tentatively detected radius variations with wavelength for both planets, in particular in the case of WASP-45 b we found a slightly larger absorption in the redder bands than in the bluer ones. No hints for the presence of an additional planetary companion in the two systems were found either from the photometric or radial velocity measurements.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	TRANSITING EXTRASOLAR PLANETS ; STELLAR EVOLUTION DATABASE ; HIGH-PRECISION PHOTOMETRY ; LIMB-DARKENING LAW ; LIGHT-CURVE ; TRANSMISSION SPECTRA ; ATMOSPHERE MODELS ; SURFACE GRAVITIES ; LOW-MASS ; TELESCOPE
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/456/1/990
语种	英语
WOS记录号	WOS:000368010000107
公开日期	2016-06-01
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9401]
专题	云南天文台_系外行星研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Max Planck Institute for Astronomy, Königstuhl 17, D-69117 – Heidelberg, Germany 2.INAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 – Pino Torinese, Italy 3.Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK 4.Austrian Academy of Sciences, Space Research Institute, Schmiedlstrasse 6, A-8042 Graz, Austria 5.Observatoire de Genève, Université de Genève, Chemin des maillettes 51, CH-1290 Sauverny, Switzerland 6.NASA Ames Research Center, Moffett Field, CA 94035, USA 7.Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 – Macul, Santiago, Chile 8.Millennium Institute of Astrophysics, Av. Vicuña Mackenna 4860, 7820436 – Macul, Santiago, Chile 9.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China 10.Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain
推荐引用方式 GB/T 7714	Ciceri, S.,Mancini, L.,Southworth, J.,et al. Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,456(1):990-1002.
APA	Ciceri, S..,Mancini, L..,Southworth, J..,Lendl, M..,Tregloan-Reed, J..,...&Wang XB.(2016).Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,456(1),990-1002.
MLA	Ciceri, S.,et al."Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multiband photometry".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 456.1(2016):990-1002.