Chandra detection of a parsec scale wind in the Broad Line Radio Galaxy 3C 382

Abstract

We present unambiguous evidence for a parsec scale wind in the Broad-Line Radio Galaxy (BLRG) 3C 382, the first radio-loud AGN, with $R_{\mathrm{L}}={\log }_{10}(f_{5GHz}/f_{4400})>1$, whereby an outflow has been measured with X-ray grating spectroscopy. A 118 ks Chandra grating (HETG) observation of 3C 382 has revealed the presence of several high ionization absorption lines in the soft X-ray band, from Fe, Ne, Mg and Si. The absorption lines are blue-shifted with respect to the systemic velocity of 3C 382 by -840\pm60 km/s and are resolved by Chandra with a velocity width of 340\pm70 km/s. The outflow appears to originate from a single zone of gas of column density $N_{\mathrm{H}}=1.3\times 10^{21}$ cm${}^{-2}$ and ionization parameter $\log \xi =2.45$. From the above measurements we calculate that the outflow is observed on parsec scales, within the likely range from 10-1000 pc, i.e., consistent with an origin in the Narrow Line Region.

11 pages, accepted for publication in Astrophysical Journal Letters

References in corpus (4)

• On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium
• The remarkable X-ray spectrum of the Broad-Line Radio Galaxy 3C 445
• 3C 33: another case of photoionized soft X-ray emission in radio galaxies
• The nature of a broad line radio galaxy: Simultaneous RXTE and Chandra HETG observations of 3C 382

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