Dwarf spheroidal galaxies as a research area focuses on low-luminosity, low-surface-brightness, pressure-supported galaxies that orbit larger hosts and provide key laboratories for testing galaxy formation and dark matter models. Studies center on their stellar kinematics, chemical abundance patterns, and star formation histories to infer dark matter halo structure, baryonic feedback processes, and environmental effects such as tidal stripping. This field integrates deep photometric surveys, high-resolution spectroscopy, and cosmological simulations to address small-scale structure challenges in ΛCDM, constrain the nature of dark matter, and refine models of hierarchical assembly and reionization-era galaxy evolution.
The absence of a signal could itself be a signal. This is the idea behind a new study published in the Journal of Cosmology and Astroparticle Physics, which aims to redefine how we search for dark matter, showing that it ...
Astronomy
8 hours ago
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By analyzing the data from the Pan-Andromeda Archaeological Survey (PandAS), European astronomers have discovered a new satellite of the Andromeda galaxy. The newfound object, which received the designation Andromeda XXXVI, ...
Using the Subaru Telescope's wide-field camera, astronomers have discovered a previously unknown structure surrounding a tiny satellite galaxy of the Milky Way. The newly discovered structure exhibits features resembling ...
Astronomy
Jan 14, 2026
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An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a decades-long debate about why galaxies spin faster than expected—and whether this behavior is caused by ...
Astronomy
Oct 27, 2025
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A cosmic dance could be the future of the Milky Way as it tracks a course to collide with neighboring galaxies, a University of Queensland survey has found. The paper is published in the Monthly Notices of the Royal Astronomical ...
Astronomy
Aug 11, 2025
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Astronomers have studied the globular cluster 47 Tucanae extensively, but still have many questions. It may have an intermediate mass black hole in its center like Omega Centauri is expected to have. There are reasons to ...
Astronomy
Jul 8, 2025
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Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), Chinese astronomers have detected a new ultra-faint dwarf galaxy, which turned out to be gas-rich. The finding was reported in a research paper published ...
By combining data from the DESI Legacy Imaging Surveys and the Gemini South telescope, astronomers have investigated three ultra-faint dwarf galaxies that reside in a region of space isolated from the environmental influence ...
Astronomy
Jan 15, 2025
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