Astrophysical: Observational astronomy

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    Accurately constraining velocity information from spectral imaging observations using machine learning techniques
    Determining accurate plasma Doppler (line-of-sight) velocities from spectroscopic measurements is a challenging endeavour, especially when weak chromospheric...
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    BACCHUS Analysis of Weak Lines in APOGEE Spectra (BAWLAS)
    Elements with weak and blended spectral features in stellar spectra are challenging to measure and require specialized analysis methods to precisely measure...
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    Chromospheric Resonances above Sunspots and Potential Seismological Applications
    Oscillations in sunspot umbrae exhibit remarkable differences between the photosphere and chromosphere. We evaluate two competing scenarios proposed for...
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    Deciphering Solar Coronal Heating: Energizing Small-scale Loops through Surface Convection
    The solar atmosphere is filled with clusters of hot small-scale loops commonly known as coronal bright points (CBPs). These ubiquitous structures stand out in...
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    Ground-based Characterization of (98943) Torifune 2001 CC<SUB>21</SUB>, the Target of the Hayabusa2# Space Mission
    The near-Earth asteroid (98943) Torifune, previously designated 2001 CC 21, is the flyby target of the Hayabusa2 extended mission, nicknamed Hayabusa2# (Small...
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    Natural Night Sky Brightness during Solar Minimum
    In 2018, Solar Cycle 24 entered into a solar minimum phase. During this period, 11 million zenithal night sky brightness (NSB) data were collected at different...
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    The Changing Rotational Light-curve Amplitude of Varuna and Evidence for a Close-in Satellite
    From CCD observations carried out with different telescopes, we present short-term photometric measurements of the large trans-Neptunian object Varuna in 10...
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    The TESS-Keck Survey: Science Goals and Target Selection
    The Kepler and TESS missions have demonstrated that planets are ubiquitous. However, the success of these missions heavily depends on ground-based radial...
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    TOI-1696: A Nearby M4 Dwarf with a 3 R <SUB>⊕</SUB> Planet in the Neptunian Desert
    We present the discovery and validation of a temperate sub-Neptune around the nearby mid-M dwarf TIC 470381900 (TOI-1696), with a radius of 3.09 ± 0.11 R ⊕ and...