Results 21 to 30 of about 6,274 (132)
HST pre-imaging of a free-floating planet candidate microlensing event
Astronomy & AstrophysicsHigh-cadence microlensing observations uncovered a population of very short-timescale microlensing events, which are believed to be caused by the population of free-floating planets (FFPs) roaming the Milky Way.
Kapusta Mateusz +35 more
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Fitting and Comparing Galactic Foreground Models for Unbiased 21 cm Cosmology
The Astrophysical Journal, 2023 Accurate detection of the cosmological 21 cm global signal requires galactic foreground models that can remove power over 10 ^6 . Although foreground and global signal models unavoidably exhibit overlap in their vector spaces inducing bias error in the ...
Joshua J. Hibbard +4 more
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The Astrophysical JournalTotal solar eclipses (TSEs) provide a unique opportunity to observe the large-scale solar corona. The solar wind plays an important role in forming the large-scale coronal structure, and magnetohydrodynamic (MHD) simulations are used to reproduce it for ...
Yihua Li +8 more
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The Hubble Missing Globular Cluster Survey
Astronomy & AstrophysicsThe Hubble Missing Globular Cluster Survey has secured high-quality astro-photometric data in two bands for 34 clusters never observed with HST. When combined with Gaia astrometry, this dataset enables the investigation of the bulk motion and the ...
Rosignoli L. +17 more
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The Astronomical Journal, 2023 Orbital eccentricity is one of the basic planetary properties, whose distribution may shed light on the history of planet formation and evolution. Here, in a series of works on Planetary Orbit Eccentricity Trends (dubbed POET), we study the distribution ...
Dong-Sheng An +3 more
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Sequential Remote Brightenings and Co-spatial Fast Downflows during Two Successive Flares
The Astrophysical Journal, 2023 Remote brightenings often appear at the outskirts of the active regions of solar eruptive events. Nevertheless, their origin remains to be ascertained. In this study, we report imaging and spectroscopic observations of sequential remote brightenings with
B. T. Wang +4 more
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Observational Study of Recurrent Jets: Evolution of Magnetic Flux, Current, and Helicity
The Astrophysical JournalWe observed three recurrent blowout jets in an active region with the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory. Using Helioseismic Magnetic Imager data we found that the magnetic flux of an emerging negative pole increases
Chang Zhou +4 more
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A New Method for Determining the Wave Turbopause Based on SABER/TIMED Data
Remote SensingThe determination of the wave turbopause is vital for understanding the dynamics of atmospheric processes in the Mesosphere and Lower Thermosphere (MLT).
Zewei Wang +9 more
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The Astrophysical Journal, 2023 The formation and eruption mechanisms of multi-ribbon flares are extremely complicated, especially when the flare is associated with homologous eruptions in the same region.
Wentai Fu +4 more
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The Missing Symbiotic Stars: A Joint Analysis with Gaia, GALEX, and XMM-Newton Data
The Astrophysical JournalThe existence of a population of low-accretion-rate symbiotic stars (SySts), consisting of a giant star and a compact companion (usually a white dwarf), has been proposed recently. However, their population has not been fully understood. In this work, we
Xiao-jie Xu, Yong Shao, Xiang-Dong Li
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