TASTY: The Hidden Life of Stars: Embedded Beginnings to AGB Endings скачать в хорошем качестве

TASTY: The Hidden Life of Stars: Embedded Beginnings to AGB Endings

Full title: The Hidden Life of Stars: Embedded Beginnings to AGB Endings in the PHANGS-JWST Sample. I. Catalog of Mid-IR Sources Speaker: Hamid Hassani Abstract: We present a multiwavelength catalog of compact, mid-infrared–selected sources in 19 nearby galaxies, combining JWST NIRCam and MIRI imaging with HST UV–optical broadband data, Hα narrow-band observations, and ALMA CO maps. We identify 24,945 compact sources at 21 μm and 55,581 at 10 μm. Artificial star tests indicate 50% completeness limits of ≈5 μJy at 10 μm and ≈24 μJy at 21 μm. Compact sources detected at 21 μm contribute approximately 20% of the total galaxy emission in that band, but only ∼5% at 10 μm. Sources are classified using stellar evolution and population synthesis models, together with empirical classifications from the literature, including Hα-bright clusters, dust-embedded optically faint clusters, red supergiants, oxygen-rich and carbon-rich AGB stars, and rarer stellar populations. By uniformly sampling a wide range of star-forming environments with well-characterized selection effects, this catalog enables systematic studies of infrared-bright stellar populations. We find that Hα-faint sources account for only ∼10% of dusty, likely young clusters, implying that the infrared-bright but optically faint phase of cluster evolution is short relative to the Hα-bright stage. The 10 and 21 μm luminosity functions are well described by power laws and show similar slopes across individual galaxies. The 21 μm luminosity function is shallow (−1.7 ± 0.1) and correlates with both total SFR and SFR surface density, consistent with emission from short-lived (less than 5 Myr) star-forming regions, while the steeper 10 μm slope (−2.0 ± 0.1) more closely resembles that of young stellar clusters. All catalog products and analyses are supported by Neloura, a web-based platform for interactive FITS visualization, multi-HDU data exploration, catalog inspection, segmentation-mask overlay, intractive peak finding, and JWST completeness testing, enabling reproducible, multiwavelength analysis of large astronomical datasets.