We report discoveries of bow-shock nebulae, seen in Hα and [O iii] λ5007, around two cataclysmic variables (CVs): LS Pegasi and ASASSN-V J205457.73+515731.9 (ASASJ2054). Additionally, both stars lie near the edges of faint extended Hα-emitting…
Category: 2. Space
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Two More Bow Shocks and Off-center Hα Nebulae Associated with Nova-like Cataclysmic Variables ∗
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The Fraction of Polar-aligned Circumbinary Disks
Circumbinary gas disks that are misaligned to the binary orbital plane evolve toward either a coplanar or a polar-aligned configuration with respect to the binary host. The preferred alignment depends on the dynamics of the disk: whether it…
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KMT-2022-BLG-0086: Another Binary-lens Binary-source Microlensing Event
We present the analysis of a microlensing event KMT-2022-BLG-0086 of which the overall light curve is not described by a binary-lens single-source (2L1S) model, which suggests the existence of an extra lens or an extra source. We found that the…
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Ultradeep Imaging of Nearby Dwarf Irregular Galaxies: Young Objects in the Far Outer Disk
Ultradeep UBVI imaging of 10 nearby (≤7.8 Mpc) noninteracting dwarf irregular galaxies are used to examine their far outer stellar disks. The annulus between 26 mag arcsec−2 and 29 mag arcsec−2 in the V band is what we define as the far…
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Curiosity Blog, Sol 4588: Ridges and troughs
Written by Lucy Thompson, APXS Collaborator and Senior Research Scientist at the University of New Brunswick, Canada
Earth planning date: Wednesday, July 2, 2025
As we traverse the boxwork terrain, we are encountering a series of more…
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Interstellar Amorphous Ice Contains Tiny Crystals, New Research Reveals
Low-density amorphous ice is one of the most common solid materials in the Universe and a key material for understanding the many famous anomalies of liquid water. Yet, despite its significance and its discovery nearly 90 years ago, its…
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Lucy Provides Full View of Main-Belt Asteroid Donaldjohanson
NASA’s Lucy mission continues to analyze images collected during the spacecraft’s April 20, 2025 encounter with the carbonaceous asteroid Donaldjohanson.
Donaldjohanson as seen by NASA’s Lucy spacecraft from a range of about 2,700 km…
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