ground-based astronomy Archives

Various reduction steps applied for an individual ESPRESSO order of DS1. (a) Before telluric removal with molecfit. (b) After telluric removal with molecfit and shifted to the stellar rest frame. (c) Each spectrum is placed on a common blaze function (see Sect. 2.4). (d) Residuals after division through by the mean out-of-transit spectrum, weighted on their uncertainties. This panel shows the final data product used in the molecfit preprocessing analysis. (e) Residuals after division through by the mean out-of-transit spectrum, weighted on their uncertainties, and subtraction of the SysRem model. This panel shows the final data product used in the SysRem preprocessing analysis. It is worth noting that for this procedure, we do not perform any preceding telluric removal (i.e., Sect. 2.4, Step (2)). (f) A magnification of panel (e) showing the wavelength shifts caused by each injected model. The planetary velocity curve for P2 is shown as a white dashed curve, whereas the slower moving planet’s (P12) velocity curve is shown as a white dotted curve. -- astro-ph.EP

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Assessing Methods for Telluric Removal On Atmospheric Retrievals of High-resolution Optical Exoplanetary Transmission Spectra

by Keith CowingOctober 29, 2024October 29, 2024

Recent advancements in ultra-stable ground-based high-resolution spectrographs have propelled ground-based astronomy to the forefront of exoplanet detection and characterisation. Retrieving accurate atmospheric parameters depends on accurate modelling and removal of […]

ground-based astronomy

Assessing Methods for Telluric Removal On Atmospheric Retrievals of High-resolution Optical Exoplanetary Transmission Spectra

Sugar Erythrulose Discovered In Interstellar Space

Sample Return: Minimizing Decompression And Warming During Deep Seawater Collection Increases Abundance And Activity Of Autochthonous Bacteria And Archaea

Sample Return From Earth’s Deep Biosphere

NASA Spaceline Current Awareness List #1,207 10 July 2026 (Space Life Science Research Results)

The Sun’s Chemical Peculiarity: Disentangling Galactic Chemical Evolution And Planetary Engulfment In Solar Twins