2 citations · 2 across the 11 of their papers we have counts for
12 papers
A Study on the Evolution of NGC6822. I. Investigating the Star Formation History through Evolved Stellar Populations
Fatemeh Khatamsaz, Mahdi Abdollahi, Atefeh Javadi +4
NGC6822 is an isolated dwarf irregular galaxy in the Local Group at a distance of 490 kpc . In this paper, we derived the star formation history (SFH) of NGC6822 employing a…
Systematic and Statistical Uncertainties in Cepheid PL Relations: Incorporating a Cross-Filter Random-Phase Mitigation Approach
Mahdi Abdollahi, Atefeh Javadi
The Period-Luminosity (PL) relation of Cepheid variable stars is a fundamental tool for measuring extragalactic distances and constraining the Hubble constant (H0). Achieving high…
The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies-VIII. A Census of Long-Period Variable Stars across the Andromeda Dwarf Satellite System
Hedieh Abdollahi, Atefeh Javadi, Jacco Th. van Loon +6
We present a comprehensive catalog, in the Sloan and Harris filters, of long-period variable (LPV) stars in the spheroidal dwarf satellites of the Andromeda galaxy, based o…
Metallicity Effects on Machine Learning Classification of Dusty Stellar Sources in the Magellanic Clouds
Sepideh Ghaziasgar, Mahdi Abdollahi, Atefeh Javadi +4
Differences in metallicity between the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC) offer an opportunity to examine whether environmental metallicity affects t…
Mitigating Random-Phase Sampling Noise in the Cepheid Period-Luminosity Relation: A Cross-Filter Consistency Approach
Mahdi Abdollahi, Atefeh Javadi, Barry F. Madore +2
The Period-Luminosity (PL) relation is usually derived using time-averaged magnitudes, which require multiple-epoch observations to determine periods and adequately sample the ligh…
Comparison of Photometric and Spectroscopic Labels in Classifying Dusty Stellar Sources Using Machine Learning in the Magellanic Clouds
Sepideh Ghaziasgar, Mahdi Abdollahi, Atefeh Javadi +4
Dusty stellar sources, including young stellar objects (YSOs) and evolved stars such as oxygen- and carbon-rich AGBs (OAGBs, CAGBs), red supergiants (RSGs), and post-AGB stars (PAG…
Dusty stellar sources classification by implementing machine learning methods based on spectroscopic observations in the Magellanic Clouds
Sepideh Ghaziasgar, Mahdi Abdollahi, Atefeh Javadi +7
Dusty stellar point sources are a significant stage in stellar evolution and contribute to the metal enrichment of galaxies. These objects can be classified using photometric and s…
Machine Learning Classification of Young Stellar Objects and Evolved Stars in the Magellanic Clouds Using the Probabilistic Random Forest Classifier
Sepideh Ghaziasgar, Mahdi Abdollahi, Atefeh Javadi +4
The Magellanic Clouds (MCs) are excellent locations to study stellar dust emission and its contribution to galaxy evolution. Through spectral and photometric classification, MCs ca…
Star Formation History of the Local Group Dwarf Irregular Galaxy, NGC 6822
Fatemeh Khatamsaz, Mahdi Abdollahi, Hedieh Abdollahi +2
NGC 6822 is an isolated dwarf irregular galaxy in the local group at a distance of 490 kpc. In this paper, we present the star formation history (SFH) within a field with a radius…
Deciphering Galactic Halos: A Detailed Review of Star Formation in NGC 5128 (Cen A)
Mahdi Abdollahi, Sima Taefi Aghdam, Atefeh Javadi +6
NGC 5128 (Centaurus A), the closest giant elliptical galaxy outside the Local Group to the Milky Way, is one of the brightest extragalactic radio sources. It is distinguished by a…
Detection of the Long Period Variable Stars of And II Dwarf Satellite galaxy
Hedieh Abdollahi, Atefeh Javadi, Jacco Th. van Loon +5
We conducted an extensive study of the spheroidal dwarf satellite galaxies around the Andromeda galaxy to produce an extensive catalog of LPV stars. The optical monitoring project…
The Complex Star Formation History of the Halo of NGC 5128 (Cen A)
Sima Taefi Aghdam, Atefeh Javadi, Seyedazim Hashemi +6
NGC 5128 (Cen A) is the nearest giant elliptical galaxy and one of the brightest extragalactic radio sources in the sky, boasting a prominent dust lane and jets emanating from its…