6 papers
X-ray and optical decline of the intermediate mass black hole HLX-1
Roberto Soria, Maya Garbaccio Gili, Francesco Massaro +2
The paper presents new Hubble, Chandra, and Swift observations of the intermediate‑mass black hole candidate HLX‑1, showing a rapid X‑ray decline while the optical/UV emission fade…
statmorph-lsst: Quantifying and correcting morphological biases in galaxy surveys
Elizaveta Sazonova, Cameron R. Morgan, Michael Balogh +16
Quantitative morphology provides a key probe of galaxy evolution across cosmic time and environments. However, these metrics can be biased by changes in imaging quality - resolutio…
AGILE: an end-to-end Rubin-LSST simulation of AGNs, galaxies, and stars I. Software description and first data release
A. Viitanen, A. Bongiorno, I. Saccheo +37
Contemporary large-scale surveys such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) and Euclid present an unprecedented discovery potential for studying A…
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…
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).…
Multi-wavelength study of a hyperluminous X-ray source near NGC 6099: a strong IMBH candidate
Yi-Chi Chang, Roberto Soria, Albert K. H. Kong +3
We report on the intriguing properties of a variable X-ray source projected at the outskirts of the elliptical galaxy NGC 6099 ( Mpc). If truly located near NGC 6099…