3 papers
astro-ph.HE2026
X-ray and optical decline of the intermediate mass black hole HLX-1
Roberto Soria, Maya Garbaccio Gili, Francesco Massaro +2
HLX-1 is a prominent intermediate-mass black hole (IMBH) candidate, historically exhibiting recurrent X-ray outbursts with spectral state transitions analogous to those observed in…
astro-ph.GA2025
Supermassive black hole mass measurement in the spiral galaxy NGC 4736 Using JWST/NIRSpec stellar kinematics
Dieu D. Nguyen, Hai N. Ngo, Tinh Q. T. Le +12
We present accurate mass measurements of the central supermassive black hole (SMBH) in NGC 4736 (M 94).\ We used the ``gold-standard" stellar absorption features (CO band heads) at…
astro-ph.GA2025
Dot to dot: high- little red dots in - diagrams with galaxy-morphology-specific scaling relations
Alister W. Graham, Igor V. Chilingarian, Dieu D. Nguyen +3
The high redshift 'little red dots' (LRDs) detected with the James Webb Space Telescope are considered to be the cores of emerging galaxies that host active galactic nuclei (AGN).…