The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to […]
astronomy
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Status Report
Parsec Scales Of Carbon Chain And Complex Organic Molecules In AFGL 2591 And IRAS 20126
(Abridged) There is a diverse chemical inventory in protostellar regions leading to the classification of extreme types of systems. Warm carbon chain chemistry sources, for one, are the warm and […]
Posted inAstrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Status Report
Reflected Spectroscopy Of Small Exoplanets III: Probing The UV Band To Measure Biosignature Gasses
Direct-imaging observations of terrestrial exoplanets will enable their atmospheric characterization and habitability assessment. Considering the Earth, the key atmospheric signatures for the biosphere is O2 and the photochemical product O3.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Space Weather & Heliophysics, Status Report
The CARMENES Search For Exoplanets Around M Dwarfs. Behaviour Of The Paschen Lines During Flares And Quiescence
The hydrogen Paschen lines are known activity indicators, but studies of them in M~dwarfs during quiescence are as rare as their reports in flare studies. This situation is mostly caused […]
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Imaging & Spectroscopy, Interstellar, Status Report
The Automated Reaction-Pathway Search reveals the Energetically Favorable Synthesis of Interstellar CH3OCH3 and HCOOCH3
Recent astronomical observations have shown that interstellar complex organic molecules (COMs) exist even in cold environments (∼10 K), while various interstellar COMs have conventionally been detected in the hot gas […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Revisiting Planetary Systems in Okayama Planet Search Program: A New Long-period planet, RV Astrometry Joint Analysis, And Multiplicity-metallicity Trend Around Evolved Stars
In this study, we revisit 32 planetary systems around evolved stars observed within the framework of the Okayama Planet Search Program and its collaborative framework of the EAPS-Net to search […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Radiation, Status Report
The Radiation Environments of Middle-Aged F-Type Stars
Far ultraviolet (FUV) emission lines from dwarf stars are important driving sources of photochemistry in planetary atmospheres. Properly interpreting spectral features of planetary atmospheres critically depends on the emission of […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report
Metrics For Optimizing Searches For Tidally Decaying Exoplanets
Tidal interactions between short-period exoplanets and their host stars drive orbital decay and have likely led to engulfment of planets by their stars.
Posted inAstronomy & Telescopes, SETI & Technosignatures, Status Report
A Search For Technosignatures Around 11,680 Stars With The Green Bank Telescope At 1.15-1.73 GHz
We conducted a search for narrowband radio signals over four observing sessions in 2020-2023 with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
TCF Periodogram’s High Sensitivity: A Method For Optimizing Detection Of Small Transiting Planets
We conduct a methodological study for statistically comparing the sensitivities of two periodograms for weak signal planet detection in transit surveys: the widely used Box-Least Squares (BLS) algorithm following light […]