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arXiv 0710.0602astro-ph
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HAT-P-4 b:富含金属的低密度热木星

HAT-P-4b: A metal-rich low-density transiting hot Jupiter

G. Kovacs, G. A. Bakos, G. Torres, A. Sozzetti, D. W. Latham, R. W. Noyes, R. P. Butler, G. W. Marcy, D. A. Fischer, J. M. Fernandez, G. Esquerdo, D. D. Sasselo… 展开作者

G. Kovacs, G. A. Bakos, G. Torres, A. Sozzetti, D. W. Latham, R. W. Noyes, R. P. Butler, G. W. Marcy, D. A. Fischer, J. M. Fernandez, G. Esquerdo, D. D. Sasselov, R. P. Stefanik, A. Pal, J. Lazar, I. Papp, P. Sari

摘要:

我们描述了发现的HAT-P-4 b,一个低密度的太阳系外行星过境BD+36 2593,V = 11.2等轻微演变的金属丰富的晚F星。它的轨道周期为3.056536+/-0.000057 d,中天历元为2,454,245.8154 +/-0.0003(HJD)。基于高精度的光度和光谱数据,并通过使用凌日光变曲线建模,光谱分析和演化模型,我们得到以下行星参数:Mp= 0.68 +/- 0.04 MJ,Rp= 1.27 +/- 0.05 RJ,rho = 0.41 +/- 0.06 g cm-3和a = 0.0446 +/- 0.0012 AU。由于其相对较大的半径,加上其假定的母恒星的高金属丰度,这颗行星增加了解释膨胀的太阳系外行星的理论挑战。

英文摘要:

We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD+36 2593, a V = 11.2 mag slightly evolved metal-rich late F star. The planet's orbital period is 3.056536+/-0.000057 d with a mid-transit epoch of 2,454,245.8154 +/- 0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis and evolutionary models, we derive the following planet parameters: Mp= 0.68 +/- 0.04 MJ, Rp= 1.27 +/- 0.05 RJ, rho = 0.41 +/- 0.06 g cm-3 and a = 0.0446 +/- 0.0012 AU. Because of its relatively large radius, together with its assumed high metallicity of that of its parent star, this planet adds to the theoretical challenges to explain inflated extrasolar planets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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