94 citations · 1.1k across the 65 of their papers we have counts for
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Universal depletion of metal-poor globular clusters in inner galaxy regions: Fossil record of black hole retention
Ali Rostami-Shirazi, Narges Rostami, Hosein Haghi +1
We analyzed the spatial distribution of globular cluster (GC) systems across 37 host galaxies in a two dimensional parameter space defined by projected galactocentric distance Rg a…
Massive Star Formation at Supersolar Metallicities: Constraints on the Initial Mass Function
Eda Gjergo, Zhiyu Zhang, Pavel Kroupa +6
Metals enhance the cooling efficiency of molecular clouds, promoting fragmentation. Consequently, increasing the metallicity may boost the formation of low-mass stars. Within the i…
Machine Learning Classification of COSMOS2020 Galaxies: Quiescent vs. Star-Forming
Vahid Asadi, Nima Chartab, Akram Hasani Zonoozi +4
Accurately distinguishing between quiescent and star-forming galaxies is essential for understanding galaxy evolution. Traditional methods, such as spectral energy distribution (SE…
Origin of High Dark Remnant Fractions in Milky Way Globular Clusters: The Crucial Role of Initial Black Hole Retention
Ali Rostami-Shirazi, Holger Baumgardt, Akram Hasani Zonoozi +2
Comparing the dynamical and stellar masses of Milky Way (MW) globular clusters (GCs) reveals a discrepancy exceeding a factor of two. Since this substantial invisible mass is conce…
Dark Star Clusters or Ultra-Faint Dwarf galaxies? Revisiting UMa3/U1
Ali Rostami-Shirazi, Hosein Haghi, Akram Hasani Zonoozi +1
Owing to sparse spectroscopic observations, the classification of faint satellites as either dark matter-dominated dwarf galaxies or self-gravitating star clusters remains unresolv…
Are the ONC, Pleiades, and Hyades snapshots of the same embedded cluster?
Ghasem Safaei, Hosein Haghi, Akram Hasani Zonoozi +1
Using direct -body simulations, we investigate the initial conditions and evolution of a star-forming region resembling the Orion Nebula Cluster (ONC) with the advanced \textsc{…
The effect of the environment-dependent stellar initial mass function on the baryonic Tully Fisher relation
Akram Hasani Zonoozi, Hosein Haghi, Pavel Kroupa +4
We investigate the impact of an environment-dependent galaxy-wide stellar initial mass function (gwIMF) on the baryonic Tully-Fisher relation (BTFR). The integrated galaxy-wide IMF…
Semi-supervised classification of stars, galaxies and quasars using K-means and random-forest approaches
Vahid Asadi, Hosein Haghi, Akram Hasani Zonoozi
Classifying stars, galaxies, and quasars is essential for understanding cosmic structure and evolution; however, the vast data from modern surveys make manual classification imprac…
Leveraging Machine Learning for Accurate and Fast Stellar Mass Estimation of Galaxies
Vahid Asadi, Akram Hasani Zonoozi, Hosein Haghi +4
Unveiling the evolutionary history of galaxies necessitates a precise understanding of their physical properties. Traditionally, astronomers achieve this through spectral energy di…
COSMOS-Web: Estimating Physical Parameters of Galaxies Using Self-Organizing Maps
Fatemeh Abedini, Ghassem Gozaliasl, Akram Hasani Zonoozi +38
The COSMOS-Web survey, with its unparalleled combination of multiband data, notably, near-infrared imaging from JWST's NIRCam (F115W, F150W, F277W, and F444W), provides a transform…
Stellar population synthesis models with a physically varying IMF
Akram Hasani Zonoozi, Hosein Haghi, Pavel Kroupa
Interpreting galactic luminosity requires assumptions about the galaxy-wide initial mass function (gwIMF), often assumed invariant in most stellar population synthesis (SPS) models…