The Ultra-fast Outflows of PG 1211+143

Prior X-ray studies of the Narrow Line Seyfert 1 galaxy PG 1211+143 utilizing the XMM-Newton Reflection Gratings Spectrometer have revealed evidence for highly ionized, outflowing wind components with velocities on the order of 10% the speed of light. In this work we describe deep (430 ksec) X-ray observations with the higher spectral resolution Chandra High Energy Transmission Gratings that were performed contemporaneously with Hubble Space Telescope Cosmic Origins Spectrograph (HST-COS) and Jansky Very Large Array observations. We confirm the presence of an ultra-fast outflow with velocity ~6% of the speed of light in the PG 1211+143 rest frame, as well as the presence of narrow, low velocity fluorescent and He-like Fe emission lines (consistent with unresolved Fe features in recent NuSTAR observations of PG 1211+143). We use the multi-wavelength spectra to construct an ionizing spectral energy distribution for photoionization calculations, and successfully describe the outflow as a warm absorber with ionization parameter log₁₀ (ξ/erg s^-1) ~ 2.8 and column N_H ~3 × 10²¹ cm^-2. Furthermore, the UV spectra obtained with HST-COS reveal a broad, blue-shifted Lyman-alpha feature, also with an outflow velocity of ~0.06 c, which could be a potential counterpart to the X-ray ultra-fast outflow.