Chandra Discovery of a Tree in the X-ray Forest towards PKS 2155-304 : the Local Filament ?

@inproceedings{Nicastro2001ChandraDO,
  title={Chandra Discovery of a Tree in the X-ray Forest towards PKS 2155-304 : the Local Filament ?},
  author={Fabrizio Nicastro and Andreas Zezas and Jeremy J. Drake and Martin S. Elvis and Fabrizio Fiore and Antonella Fruscione and Massimo Marengo and Smita Mathur and Stefano Bianchi},
  year={2001}
}
We present the first X-ray detection of resonant absorption from warm/hot local gas either in our Galaxy, or in the Intergalactic space surrounding our Galaxy, along the line of sight toward the blazar PKS 2155-304. The Chandra HRCS-LETG spectrum of this z=0.116 source clearly shows, at ≥ 5σ level, unresolved (FWHM ≤ 800 km s at a 2σ confidence level) OVIIK… CONTINUE READING