Characterizing the Low‐Redshift Intergalactic Medium toward PKS 1302−102

Characterizing the Low-redshift Intergalactic Medium towards Pks1302–102

We present a detailed analysis of the intergalactic metal-line absorption systems in the archival HST/STIS and FUSE ultraviolet spectra of the low-redshift quasar PKS1302–102 (zQSO = 0.2784). We supplement the archive data with CLOUDY ionization models and a survey of galaxies in the quasar field. There are 15 strong Lyα absorbers with column densities logNHI > 14. Of these, six are associated ...

Probing the Intergalactic Medium–galaxy Connection toward Pks 0405 123. I. Ultraviolet Spectroscopy and Metal-line Systems

We present results from an analysis of FUSE spectroscopy of the zem 1⁄4 0:57 quasar PKS 0405 123. We focus on the intervening metal-line systems identified along the sight line and investigate their ionization mechanism, ionization state, and chemical abundances. Including Hubble Space Telescope STIS spectroscopy, we survey the entire sight line and identify six O vi absorbers to a 3 equivalent...

Confirming the Detection of an Intergalactic X-ray Absorber toward Pks 2155-304

We present new observations on PKS 2155-304 with the Chandra Low Energy Transmission Grating Spectrometer (LETG), using the Advanced CCD Imaging Spectrometer (ACIS). We confirm the detection of an absorption line plausibly identified as O VIII Lyα from the warm-hot intergalactic medium associated with a small group of galaxies along the line of sight, as originally reported by Fang et al. 2002 ...

Intergalactic Medium

Simulations of the Intergalactic Medium

I present a review by epoch of baryons in the intergalac-tic medium (IGM), from the first star until today. Recent observations indicate a protracted period of reionization, suggesting multiple populations of reionizers; detection of these z ∼ > 6 sources is a key goal that is now coming within reach. The optical Lyman alpha forest (2 ∼ < z ∼ < 4) is well-described by the Fluctuating Gunn-Peter...