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arXiv 2204.03327astro-ph.EP
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五台热断路器的TESS断路器上的约束

Constraints on TESS albedos for five hot Jupiters

Martin Blažek, Petr Kabáth, Anjali A. A. Piette, Nikku Madhusudhan, Marek Skarka, Ján Šubjak, David R. Anderson, Henri M. J. Boffin, Claudio C. Cáceres, Neale P… 展开作者

Martin Blažek, Petr Kabáth, Anjali A. A. Piette, Nikku Madhusudhan, Marek Skarka, Ján Šubjak, David R. Anderson, Henri M. J. Boffin, Claudio C. Cáceres, Neale P. Gibson, Sergio Hoyer, Valentin D. Ivanov, Patricio M. Rojo

摘要:

对凌日系外行星掩星的光度观测可以对它们大气的热辐射和反射率产生重要的限制。我们分析测光测量和导出几何的$A_\mathrm{g}$($A_\mathrm{g}$)约束的五个热彗星观察TESS在光学:WASP-18 b,WASP-36 b,WASP-43 b,WASP-50 b和WASP-51 b。对于WASP-43 b,我们的结果得到了VLT/HAWK-I在$2.09~μ$ m近红外观测的补充。我们推导出WASP-50 b和WASP-51 b的第一个几何约束条件:分别为$A_\mathrm{g}<0.445$和$A_\mathrm{g}<0.368$。我们发现,WASP-43 b和WASP-18 b都符合低几何双折射率($A_\mathrm{g}<0.16$),即使它们位于热木星温度范围的两端,平衡温度分别为$\sim1400$ K和$\sim2500$ K。我们报告的自洽大气模型,解释宽带观测两颗行星从TESS,\HST,\Spitzer和VLT/HAWK-I。我们发现,这两个炎热的彗星的数据可以解释单独的热辐射和效率低下的昼夜能量再分配。这些数据不需要云/霾的光学散射,与观察到的低几何散射一致。

英文摘要:

Photometric observations of occultations of transiting exoplanets can place important constraints on the thermal emission and albedos of their atmospheres. We analyse photometric measurements and derive geometric albedo ($A_\mathrm{g}$) constraints for five hot Jupiters observed with TESS in the optical: WASP-18 b, WASP-36 b, WASP-43 b, WASP-50 b and WASP-51 b. For WASP-43 b, our results are complemented by a VLT/HAWK-I observation in the near-infrared at $2.09~μ$m. We derive the first geometric albedo constraints for WASP-50 b and WASP-51 b: $A_\mathrm{g}<0.445$ and $A_\mathrm{g}<0.368$, respectively. We find that WASP-43 b and WASP-18 b are both consistent with low geometric albedos ($A_\mathrm{g}<0.16$) even though they lie at opposite ends of the hot Jupiter temperature range with equilibrium temperatures of $\sim1400$ K and $\sim2500$ K, respectively. We report self-consistent atmospheric models which explain broadband observations for both planets from TESS, \HST, \Spitzer and VLT/HAWK-I. We find that the data of both hot Jupiters can be explained by thermal emission alone and inefficient day-night energy redistribution. The data do not require optical scattering from clouds/hazes, consistent with the low geometric albedos observed.

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