Gilbertson, WoodrowWoodrowGilbertsonLehmer, Bret D.Bret D.LehmerDoore, KeithKeithDooreEufrasio, Rafael T.Rafael T.EufrasioBasu-Zych, AntaraAntaraBasu-ZychBrandt, William N.William N.BrandtFragos, TassosTassosFragosGarofali, KristenKristenGarofaliKovlakas, KonstantinosKonstantinosKovlakasLuo, BinBinLuoTOZZI, PaoloPaoloTOZZIVito, FabioFabioVitoWilliams, Benjamin F.Benjamin F.WilliamsXue, YongquanYongquanXue2022-03-292022-03-2920220004-637Xhttp://hdl.handle.net/20.500.12386/31995The Chandra Deep Field-South and North surveys (CDFs) provide unique windows into the cosmic history of X-ray emission from normal (nonactive) galaxies. Scaling relations of normal-galaxy X-ray luminosity (L X) with star formation rate (SFR) and stellar mass (M ∗) have been used to show that the formation rates of low-mass and high-mass X-ray binaries (LMXBs and HMXBs, respectively) evolve with redshift across z ≈ 0-2 following L HMXB/SFR α(1 + z) and L LMXB/M ∗ α(1 + z)2-3. However, these measurements alone do not directly reveal the physical mechanisms behind the redshift evolution of X-ray binaries (XRBs). We derive star formation histories for a sample of 344 normal galaxies in the CDFs, using spectral energy distribution (SED) fitting of FUV-to-FIR photometric data, and construct a self-consistent, age-dependent model of the X-ray emission from the galaxies. Our model quantifies how X-ray emission from hot gas and XRB populations vary as functions of host stellar-population age. We find that (1) the ratio L X/M ∗ declines by a factor of ∼1000 from 0 to 10 Gyr and (2) the X-ray SED becomes harder with increasing age, consistent with a scenario in which the hot gas contribution to the X-ray SED declines quickly for ages above 10 Myr. When dividing our sample into subsets based on metallicity, we find some indication that L X/M ∗ is elevated for low-metallicity galaxies, consistent with recent studies of X-ray scaling relations. However, additional statistical constraints are required to quantify both the age and metallicity dependence of X-ray emission from star-forming galaxies.STAMPAenArticle10.3847/1538-4357/ac40492-s2.0-85125870605https://api.elsevier.com/content/abstract/scopus_id/85125870605https://iopscience.iop.org/article/10.3847/1538-4357/ac40492022ApJ...926...28GFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation