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

الأصل · EN

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 L = ₁₀(f 5GHz/f₄₄₀₀)>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±60 km/s and are resolved by Chandra with a velocity width of 340±70 km/s. The outflow appears to originate from a single zone of gas of column density N H = 1.3 × 10²¹ cm⁻² and ionization parameter ξ= 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.