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7 papers · 2 filters
Limits to dynamic range in GHz-THz single-dish planetary spectra
J S Greaves
When bright solar-system objects are observed by GHz-THz regime telescopes, off-axis signals bounce around locally and re-enter the signal path with a time delay, causing sinusoida…
The Discovery and Evolution of a Possible New Epoch of Cometary Activity by the Centaur (2060) Chiron
Matthew M. Dobson, Megan E. Schwamb, Alan Fitzsimmons +24
Centaurs are small Solar System objects on chaotic orbits in the giant planet region, forming an evolutionary continuum with the Kuiper belt objects and Jupiter-family comets. Some…
Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
Lorenzo V. Mugnai, Mark R. Swain, Raissa Estrela +1
The challenge of inconsistent results from different data pipelines, even when starting from identical data, is a recognized concern in exoplanetary science. As we transition into…
Astrobiological Potential of Venus Atmosphere Chemical Anomalies and Other Unexplained Cloud Properties
Janusz J. Petkowski, Sara Seager, David H. Grinspoon +7
Long-standing unexplained Venus atmosphere observations and chemical anomalies point to unknown chemistry but also leave room for the possibility of life. The unexplained observati…
ARES VI: Viability of one-dimensional retrieval models for transmission spectroscopy characterization of exo-atmospheres in the era of JWST and Ariel
Adam Yassin Jaziri, William Pluriel, Andrea Bocchieri +10
Observed exoplanet transit spectra are usually retrieved using 1D models to determine atmospheric composition while planetary atmospheres are 3D. With the JWST and future space tel…
Stability of 20 Biogenic Amino Acids in Concentrated Sulfuric Acid: Implications for the Habitability of Venus' Clouds
Maxwell D. Seager, Sara Seager, William Bains +1
Scientists have long speculated about the potential habitability of Venus, not at the 700K surface, but in the cloud layers located at 48-60 km altitudes, where temperatures match…