带有LBT的HAT-P-32 b的透射光谱学：确认行星大气中的云/雾
Transmission spectroscopy of HAT-P-32b with the LBT: confirmation of clouds/hazes in the planetary atmosphere
摘要：
太阳系外行星凌日事件的光谱观测为研究行星大气的组成提供了机会。我们在LBT观测到了膨胀的热木星HAT-P-32 b的过境，并在3300到10000 AA的大气层中观察到了MODS。将目标星和参考星光谱的时间序列在两个宽带波长通道中进行分箱，由此构造差分凌日光变曲线。这些宽带光变曲线用于确认先前的传输参数测定。为了获得分辨率为R ~ 60的行星透射光谱，我们创建了一组62个窄带光变曲线，平均波长宽度约为100 AA。光谱被校正为附近M星的第三次光，其光谱在单独曝光中被解析。此外，我们还对主星进行了光度监测，以纠正星点的影响。HAT-P-32 b的透射光谱没有显示出来自Na和K的压力展宽吸收特征，这是由于行星大气中存在云或霾。这一结果与以前在同一行星上的研究一致。可以排除气相中TiO的存在。我们发现在钾（KI~7699 AA）的线芯中增加吸收的2.8 σ指示。未检测到Na和Ha的窄吸收特征。此外，还发现了从近红外到近紫外的蓝色波长不透明度增加的初步迹象，其幅度为两个刻度高度。如果通过后续观测得到证实，则可以用气溶胶引起米氏散射或引起气溶胶-气体尺度高度比低于1的瑞利散射来解释。
英文摘要：
Spectroscopic observations of a transit event of an extrasolar planet offer the opportunity to study the composition of the planetary atmosphere. We observed a transit of the inflated Hot Jupiter HAT-P-32b with MODS at the LBT to characterize its atmosphere from 3300 to 10000 AA. A time series of target and reference star spectra was binned in two broad-band wavelength channels, from which differential transit light curves were constructed. These broad-band light curves were used to confirm previous transit parameter determinations. To derive the planetary transmission spectrum with a resolution of R ~ 60, we created a chromatic set of 62 narrow-band light curves with an average wavelength width of about 100 AA. The spectrum was corrected for the third-light of a near-by M star, whose spectrum was resolved in the individual exposures. Additionally, we undertook a photometric monitoring campaign of the host star to correct for the influence of starspots. The transmission spectrum of HAT-P-32b shows no pressure-broadened absorption features from Na and K, which is interpreted by the presence of clouds or hazes in the planetary atmosphere. This result is in agreement to previous studies on the same planet. The presence of TiO in gas phase could be ruled out. We find a 2.8 sigma indication of increased absorption in the line core of potassium (KI~7699 AA). No narrow absorption features of Na and Halpha were detected. Furthermore, tentative indications were found for a slope of increasing opacity toward blue wavelengths from the near-IR to the near-UV with an amplitude of two scale heights. If confirmed by follow-up observations, it can be explained by aerosols either causing Mie scattering or causing Rayleigh scattering with an aerosol - gas scale height ratio below unity.
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。
