SPORK That Spectrum: Increasing Detection Significances from High-Resolution Exoplanet Spectroscopy with Novel Smoothing Algorithms
arXiv:2108.12057 · doi:10.3847/1538-3881/ac6bfa
Abstract
Spectroscopic studies of planets outside of our own solar system provide some of the most crucial information about their formation, evolution, and atmospheric properties. In ground-based spectroscopy, the process of extracting the planet's signal from the stellar and telluric signal has proven to be the most difficult barrier to accurate atmospheric information. However, with novel normalization and smoothing methods, this barrier can be minimized and the detection significance dramatically increased over existing methods. In this paper, we take two examples of CRIRES emission spectroscopy taken of HD 209458 b and HD 179949 b and apply SPORK (SPectral cOntinuum Refinement for telluriKs) and iterative smoothing to boost the detection significance from 5.78 to 9.71 sigma and from 4.19 sigma to 5.90 sigma, respectively. These methods, which largely address systematic quirks introduced by imperfect detectors or reduction pipelines, can be employed in a wide variety of scenarios, from archival data sets to simulations of future spectrographs.
10 pages, 8 figures
References in corpus (40)
- The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
- Automated data reduction workflows for astronomy
- Correcting systematic effects in a large set of photometric lightcurves
- Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
- Sodium Absorption From the Exoplanetary Atmosphere of HD189733b Detected in the Optical Transmission Spectrum
- The signature of orbital motion from the dayside of the planet tau Bootis b
- Detection of water absorption in the day side atmosphere of HD 189733 b using ground-based high-resolution spectroscopy at 3.2 microns
- Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
- Retrieving Temperatures and Abundances of Exoplanet Atmospheres with High-Resolution Cross-Correlation Spectroscopy
- Ground-based detection of sodium in the transmission spectrum of exoplanet HD209458b
- Atomic iron and titanium in the atmosphere of the exoplanet KELT-9b
- Rotation and winds of exoplanet HD 189733 b measured with high-dispersion transmission spectroscopy
- Detection of carbon monoxide in the high-resolution day-side spectrum of the exoplanet HD 189733b
- Carbon monoxide and water vapor in the atmosphere of the non-transiting exoplanet HD 179949 b
- Five carbon- and nitrogen-bearing species in a hot giant planet's atmosphere
- High-Resolution Spectroscopic Detection of TiO and Stratosphere in the Day-side of WASP-33b
- The 4.5 m full-orbit phase curve of the hot Jupiter HD 209458b
- Hot Nights on Extrasolar Planets: Mid-IR Phase Variations of Hot Jupiters
- Near-IR Direct Detection of Water Vapor in Tau Boo b
- The High-Resolution Transmission Spectrum of HD 189733b Interpreted with Atmospheric Doppler Shifts from Three-Dimensional General Circulation Models
- A new Search for Carbon Monoxide Absorption in the Transmission Spectrum of the Extrasolar Planet HD 209458b
- A search for starlight reflected from upsilon And's innermost planet
- Evidence against a strong thermal inversion in HD 209458 b from high-dispersion spectroscopy
- A new upper limit on the reflected starlight from Tau Bootis b
- Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b
- A Sensitive Search for Methane in the Infrared Spectrum of Tau Bootis
- Water vapor detection in the transmission spectra of HD 209458 b with the CARMENES NIR channel
- A Significant Increase in Detection of High-Resolution Emission Spectra Using a Three-Dimensional Atmospheric Model of a Hot Jupiter
- HyDRA-H: Simultaneous Hybrid Retrieval of Exoplanetary Emission Spectra
- Non-Detection of L-band Line Emission from the Exo-Planet HD189733b
- On the Eccentricity Distribution of Short-Period Single-Planet Systems
- Evidence for the Direct Detection of the Thermal Spectrum of the Non-Transiting Hot Gas Giant HD 88133 b
- A Search for molecules in the atmosphere of HD 189733b
- Constraining Hot Jupiter Atmospheric Structure and Dynamics through Doppler Shifted Emission Spectra
- Exoplanet Atmospheres at High Spectral Resolution
- Detection of Water Vapor in the Thermal Spectrum of the Non-Transiting Hot Jupiter upsilon Andromedae b
- The ground-based H, K, and L-band absolute emission spectra of HD 209458b
- Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems
- A weak spectral signature of water vapour in the atmosphere of HD 179949 b at high spectral resolution in the L-band
- HD 75289Ab revisited - Searching for starlight reflected from a hot Jupiter