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TY - JOUR AU - Privatus, Pius AU - Kanaka Rao, Pulapa V AU - Pappalardo, Cirino PY - 2024/12/02 Y2 - 2025/08/02 TI - Stellar Properties from a self-consistent Analysis JF - Tanzania Journal of Science JA - Tanz. J. Sci. VL - 50 IS - 4 SE - Physical Sciences DO - 10.4314/tjs.v50i4.14 UR - https://tjs.udsm.ac.tz/index.php/tjs/article/view/2206 SP - 898-911 AB - <p class="western" align="justify"><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">Galaxies’ spectral energy distribution (SED) has been explored through the use of spectral synthesis codes. Most of the codes so far are solely stellar and assume a negligible nebular contribution. Fitting Analysis using Differential Evolution Optimisation (FADO) is the first spectral synthesis tool to consider the nebular contribution. </span></span><span style="color: #000000;"><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">The study examines how the primary stellar attributes are affected when FADO is applied to the Max Planck Institute for Astrophysics and Johns Hopkins University (MPA-JHU) data, namely the star-formation rate, metallicity, and stellar mass. </span></span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">The findings show that nebular emission results in the change of the slope of the equation of </span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">"</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">the main sequence by 0.04 dex</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;"> "</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">,</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;"> and "</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;"> the vertical intercept by 0.3 dex</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;"> "</span></span><span style="font-family: Times New Roman, sans-serif;"><span style="font-size: small;">, and underestimates gas-phase metallicity of star-forming galaxies by 0.013.</span></span></p> ER -