NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-18 T02:05:39 PDT
Help | Comment | NED Home

For refcode 1999A&A...341...58P:
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1999A&A...341...58P The Warm Absorber constrained by the coronal lines in Seyfert 1 galaxies. PORQUET D., DUMONT A.-M., COLLIN S., MOUCHET M. Received 6 August 1998/Accepted 6 October 1998 Abstract: We present results of the photoionization code IRIS, which calculates the spectrum emitted by the Warm Absorber (WA) in Seyfert 1 galaxies for a large grid of parameters (density, column density, ionization parameter...). We show that in Seyfert 1s, coronal lines ([FeX], [FeXI], [FeXIV]...), whose emission region shares common characteristics with the WA, could be formed in the WA. Unlike the absorption edges, such as those of OVII and OVIII observed in soft X-rays which are produced by the WA, these lines strongly constrain the physical parameters of the WA, especially the hydrogen density. Indeed, in order to avoid producing coronal line equivalent widths larger than observed, a high density (n_H_ >= 10^10^cm^-3^) is required for the WA in most cases. This result is obtained for the mean observed Seyfert 1 features, as well as for the case study of MCG-6-30-15. It implies that the distance of the WA from the incident radiation source is of the order of that of the Broad Line Region (BLR). Key words: galaxies: active - galaxies: individual: MCG -6-30-15 - galaxies: Seyfert - X-rays: galaxies
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home