首页> 外文OA文献 >Rayleigh Scattering in the Atmosphere of the Warm Exo-Neptune GJ 3470b
【2h】

Rayleigh Scattering in the Atmosphere of the Warm Exo-Neptune GJ 3470b

机译:温暖的Exo-Neptune GJ 3470b大气中的瑞利散射

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

GJ 3470b is a warm Neptune-size planet transiting an M dwarf star. Like the handful of other small exoplanets for which transmission spectroscopy has been obtained, GJ 3470b exhibits a flat spectrum in the near- and mid-infrared. Recently, a tentative detection of Rayleigh scattering in its atmosphere has been reported. This signal manifests itself as an observed increase of the planetary radius as a function of decreasing wavelength in the visible. We set out to verify this detection and observed several transits of this planet with the LCOGT network and the Kuiper telescope in four different bands (Sloan g, Sloan i, Harris B, and Harris V). Our analysis reveals a strong Rayleigh scattering slope, thus confirming previous results. This makes GJ 3470b the smallest known exoplanet with a detection of Rayleigh scattering. We find that the most plausible scenario is a hydrogen/helium-dominated atmosphere covered by clouds which obscure absorption features in the infrared and hazes which give rise to scattering in the visible. Our results demonstrate the feasibility of exoplanet atmospheric characterization from the ground, even with meter-class telescopes.
机译:GJ 3470b是一颗温暖的海王星大小的行星,正在掠过一颗M矮星。像获得透射光谱的少数其他小型系外行星一样,GJ 3470b在近红外和中红外也显示出平坦的光谱。最近,已经报道了对大气中瑞利散射的初步检测。该信号表现为观察到的行星半径的增加,该半径是可见光中波长减小的函数。我们着手验证这一发现,并使用LCOGT网络和柯伊伯望远镜在四个不同的波段(斯隆g,斯隆i,哈里斯B和哈里斯V)观察了该行星的几次穿越。我们的分析显示出很强的瑞利散射斜率,从而证实了先前的结果。这使得GJ 3470b成为已知的最小的系外行星,可以检测到瑞利散射。我们发现最合理的情况是氢气/氦气为主的大气层,上面覆盖着云层,这些云层遮挡了红外线的吸收特性,而雾霾则在可见光中引起了散射。我们的结果表明,即使使用米级望远镜,也可以从地面表征系外行星大气的可行性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号