A 25-year Chandra catalog of 100 Sgr A* X-ray flares confirms that brighter flares are spectrally harder and strengthens prior correlations with duration and fluence.
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pGMCA separation of Chandra data yields the first uncontaminated X-ray maps of Sgr A East, with spectral fits showing lower ionization age and higher electron density than prior reports.
An intermediate-mass companion to Sgr A* plus resonant relaxation in a depleting gas disk can simultaneously produce the observed orbits of S-stars, clockwise disk stars, and off-disk stars within their 6-15 Myr lifetimes.
Chaotic Cold Accretion reproduces the observed near-linear black hole mass-bolometric luminosity scaling (slope 0.91) in z>2 quasars while Bondi accretion underpredicts by ~2 dex.
A workshop report recommends anomaly detection on existing telescope data to search for technosignatures from advanced minds powered by supermassive black holes.
citing papers explorer
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The Demographics of Sagittarius A* X-ray Flares over 25 Years with Chandra
A 25-year Chandra catalog of 100 Sgr A* X-ray flares confirms that brighter flares are spectrally harder and strengthens prior correlations with duration and fluence.
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Isolating Sgr A East: The First Uncontaminated X-ray Maps of a Galactic Center Supernova Remnant
pGMCA separation of Chandra data yields the first uncontaminated X-ray maps of Sgr A East, with spectral fits showing lower ionization age and higher electron density than prior reports.
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The complex kinematics of the young stars orbiting the supermassive black hole in the Galactic center can be explained by the presence of an intermediate mass companion of Sgr A$^\star$
An intermediate-mass companion to Sgr A* plus resonant relaxation in a depleting gas disk can simultaneously produce the observed orbits of S-stars, clockwise disk stars, and off-disk stars within their 6-15 Myr lifetimes.
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Constraining AGN accretion physics with black hole mass-luminosity scaling relations
Chaotic Cold Accretion reproduces the observed near-linear black hole mass-bolometric luminosity scaling (slope 0.91) in z>2 quasars while Bondi accretion underpredicts by ~2 dex.
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The Dyson Minds 2025 Workshop: SETI around Black Holes
A workshop report recommends anomaly detection on existing telescope data to search for technosignatures from advanced minds powered by supermassive black holes.