X-ray source populations in star-forming galaxies

X-ray emission from star-forming galaxies

X-ray Source Populations in Galaxies

Today’s sensitive, high-resolution X-ray observations allow the study of populations of X-ray sources, in the luminosity range of Galactic X-ray binaries, in galaxies as distant as 20-30Mpc. The traditional astronomical tools of photometric diagrams and luminosity functions are now applied to these populations, providing a direct probe of the evolved binary component of different stellar popula...

Stellar populations in local star - forming galaxies . II . - Recent star

We present the integrated properties of the stellar populations in the Universidad Complutense de Madrid (UCM) Survey galaxies. Applying the techniques described in the first paper of this series, we derive ages, burst masses and metallicities of the newly-formed stars in our sample galaxies. The population of young stars is responsible for the Hα emission used to detect the objects in the UCM ...

Ultraluminous X-ray Source Correlations with Star-forming Regions

Maps of low-inclination nearby galaxies in Sloan Digitized Sky Survey u − g, g − r and r − i colors are used to determine whether Ultraluminous X-ray sources (ULXs) are predominantly associated with star-forming regions of their host galaxies. An empirical selection criterion is derived from colors of H ii regions in M81 and M101 that differentiates between the young, blue stellar component and...

Star Formation and X-ray Emission in Distant Star Forming Galaxies

About 45% of the point sources detected in the 2 Ms Chandra exposure of the HDF-N can be matched with moderately bright galaxies with z < 1.4 that have been studied by the Caltech Faint Galaxy Redshift Survey. Although the optical spectra of these galaxies appear normal, based on their X-ray properties ∼20% of them appear to contain weak AGNs. More than 90% of the X-ray photons detected by Chan...