Telluric Lines on Stellar Spectra: Prospect for Earth’s Atmospheric Study

Astronomical spectroscopy aims to measure the spectrum of a celestial object(s). However, in the case of ground-based observation, the observed spectrum will not only present absorption or emission features from the astronomical object but also features caused by the Earth’s atmosphere, namely telluric absorption lines or telluric contamination. The telluric contamination is unwanted features in astronomy and is usually removed in the data processing. Nevertheless, they might be useful for Earth’s atmospheric study as the telluric lines will vary due to several causes (temperature, pressure, humidity, ozone content, etc.). We used spectroscopic data observed at the Bosscha Observatory, and applied spectral fitting by using the telluric transmission model. From the analysis of optical depth values, we detected variation in the telluric lines due to seasonal (monsoon). This demonstrates that stellar spectra from ground-based observation can also be used for atmospheric study.

Jenis	Karya Tulis Konfrensi
Publikasi	Journal of Physics: Conference Series