A new model atom of nitrogen was developed using the energy levels of N I from laboratory measurements and also predicted in atomic structure calculations and the most up-to-date atomic […]
Spectroscopy
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Ceres, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Status Report
Photochemical Stability and Reactivity of Sodium Pyruvate: Implications for Organic Analysis on Ceres
The dwarf planet Ceres is a high-priority target for future solar system exploration within this decade. This is motivated by the detection of organics by NASA’s Dawn mission as well […]
![ChM diagram of M dwarfs in 47 Tucanae from JWS T-HS T photometry (grey dots). Spectroscopic targets observed with NIRSpec@JWS T are represented with filled coloured circles. Targets with no available mF322W2 from NIRCam@JWS T are plotted with ∆C F606W,F814W,F322W2=0.00 as empty circles. Different colors have been used for stars associated with different stellar populations on the ChM, specifically: first population (1P) stars are colored in red, second population ones have been colored in orange (2Pa), cyan (2Pb) and blue (2Pe). The [O/Fe] abundance vs. the ∆F606W,F814W and ∆C F606W,F814W,F322W2 values is shown in the upper and right panels, respectively. For each population, we plot the average values and the associated error. -- astro-ph.GA](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/06/A-JWST-project-on-47-Tucanae.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Interstellar, Status Report
A JWST Project on 47 Tucanae. NIRSpec Spectroscopy of Multiple Populations Among M dwarfs
We present the first spectroscopic estimates of the chemical abundance of M dwarf stars in a globular cluster (GC), namely 47 Tucanae. By exploiting NIRSpec on board the James Webb […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Windows Into Other Worlds: Pitfalls in the Physical Interpretation of Exoplanet Atmospheric Spectroscopy
Atmospheric spectroscopy provides a window into the properties of exoplanets. However, the physical interpretation of retrieved data and its implications for the internal properties of exoplanets remains nebulous.
![JWST MIRI/MRS spatially maps of the [NeIII]/[NeII] emission lines. From top left (clockwise): NGC 7469, NGC 3256-N, NGC 3256-S, VV114, IIZw96 and NGC 5728.The apertures shown in Figure 2 are shown here as well. -- astro-ph.GA](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/06/Polycyclic-Aromatic-Hydrocarbon-Emission.png?resize=1200%2C790&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report
Polycyclic Aromatic Hydrocarbon Emission In Galaxies As Seen With JWST
We present a systematic study of mid-infrared spectra of galaxies including star-forming galaxies and Active Galactic Nuclei observed with JWST MIRI-MRS and NIRSpec-IFU.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Observational Characteristics Of Circum-planetary-mass-object Disks In The Era Of James Webb Space Telescope
Recent observations have confirmed circumplanetary disks (CPDs) embedded in parental protoplanetary disks (PPDs). On the other hand, planetary-mass companions (PMCs) and planetary-mass objects (PMOs) are likely to harbor their own […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
HD 21520 b: A Warm Sub-Neptune Transiting A Bright G Dwarf
We report the discovery and validation of HD 21520 b, a transiting planet found with TESS and orbiting a bright G dwarf (V=9.2, Teff=5871±62 K, R⋆=1.04±0.02R⊙).
Posted inAstrochemistry, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
MINDS. A multi-instrument investigation into the molecule-rich JWST-MIRI spectrum of the DF Tau binary system
Most stars form in multiple systems whose properties can significantly impact circumstellar disk evolution. We investigate the physical and chemical properties of the equal-mass, small separation (~66 mas, ~9 au) […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
New Instrument To Search For Signs Of Life On Other Planets
The European Southern Observatory (ESO) has signed an agreement for the design and construction of ANDES, the ArmazoNes high Dispersion Echelle Spectrograph.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Status Report
Investigating Sulfur Chemistry In The HD 163296 Disk
Sulfur chemistry in the formation process of low-mass stars and planets remains poorly understood. The protoplanetary disks (PPDs) are the birthplace of planets and its distinctive environment provides an intriguing […]