HAT-P-26 is a K-type main-sequence star located about 466 light-years (143 parsecs) away in the constellation of Virgo. A survey in 2015 did not find any stellar companions in orbit around it, [4] although a red dwarf companion with a temperature 4000 +100 −350 K …

2024年10月25日 · HAT-P-26 b is a Neptune-like exoplanet that orbits a K-type star. Its mass is 22.2481 Earths, it takes 4.2 days to complete one orbit of its star, and is 0.0479 AU from its star. Its discovery was announced in 2010.

2017年5月12日 · Using data from the Hubble and Spitzer Space Telescopes from 0.5 to 5 micrometers, we conducted a detailed atmospheric study of the transiting Neptune-mass exoplanet HAT-P-26b. We detected prominent H 2 O absorption bands with a maximum base-to-peak amplitude of 525 parts per million in the transmission spectrum.

2 天之前 · We present a new and extended transmission spectrum of the warm Neptune HAT-P-26b spanning wavelengths between 0.29 - 5.0 microns. This spectrum is derived from new HST STIS G430L observations from the PanCET program, a reanalysis of the previously published HST STIS G750L data, along with the previously published HST WFC3 IR G102 and G141 data, and the two Spitzer IRAC photometric points at 3 ...

2017年5月11日 · Using data from the Hubble and Spitzer Space Telescopes from 0.5 to 5 microns, we conducted a detailed atmospheric study of the transiting Neptune-mass exoplanet HAT-P-26b. We detected prominent H2O absorption bands with a maximum base-to-peak amplitude of 525ppm in the transmission spectrum.

detailed atmospheric study of the transiting Neptune-mass exoplanet HAT-P-26b. We detected prominent H 2O absorption bands with a maximum base-to-peak amplitude of 525 parts per million in the transmission spectrum. Using the water abundance as a proxy for metallicity, we measured HAT-P-26b’s atmospheric heavy element content (4:8þ21:5 4:0 ...

2 天之前 · The focus of this study is the warm Neptune-sized exoplanet HAT-P-26b discovered in 2011 (Hartman et al., 2011).This planet lies in a 4.23 day orbit with R p = 6.33 R ⊕ and M p = 18.6 M ⊕ and a low gravity log g p = 2.65 cm s-2.The low gravity in combination with the planet’s temperature (T eq = 1001 K) contributes to a large atmospheric scale …

2017年5月18日 · 研究人员分析了哈勃太空望远镜和斯皮策太空望远镜获得的hat-p-26b观测数据，从望远镜视角观测到这颗行星掠过主恒星前方。 在“凌日”过程中该行星大气层过滤了某些恒星光线波长，从而使研究小组能够识别HAT-P-26b大气层中的漩涡分子。

HAT-P-26b: A Neptune-mass exoplanet with a well-constrained heavy element abundance

2017年5月11日 · A study combining observations from NASA’s Hubble and Spitzer space telescopes reveals that the distant planet HAT-P-26b has a primitive atmosphere composed almost entirely of hydrogen and helium. Located about 437 light-years away, HAT-P-26b orbits a star roughly twice as old as the sun.