Charge-exchange X-ray emission of nearby star-forming galaxies

X-ray emission from star-forming galaxies

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...

Neutral Hydrogen Emission in Nearby X-ray-Selected Active Galaxies

We have searched for neutral hydrogen (H I) in 95 active galaxies using the 100-meter Green Bank Telescope. The sample includes only nearby active galaxies up to 220 Mpc away (redshifts up to 0.05). Our galaxies all contain Seyfert active galactic nuclei (AGN) detected in the hard X-ray (14-195 keV) by the Swift Gamma-ray Burst satellite’s Burst Alert Telescope (BAT) 22-month survey. The hard X...

An Integrated Spectrophotometric Survey of Nearby Star-Forming Galaxies

We present integrated optical spectrophotometry for a sample of 417 nearby galaxies. Our observations consist of spatially integrated, S/N = 10− 100 spectroscopy between 3600 and 6900 Å at ∼ 8 Å FWHM resolution. In addition, we present nuclear (2. 5 × 2. 5) spectroscopy for 153 of these objects. Our sample targets a diverse range of galaxy types, including starbursts, peculiar galaxies, interac...

Evolution of Star Forming and Active Galaxies in Nearby Clusters

We have used optical spectroscopy to investigate the active galaxy populations in a sample of 20 nearby Abell clusters. The targets were identified on the basis of 1.4 GHz radio emission, which identifies them as either AGN or galaxies forming stars at rates comparable to or greater than that of the Milky Way. The spectra were used to characterize the galaxies via their emission and absorption ...