Galactic H i Column Densities toward Quasars and Active Galactic Nuclei

Details Galactic H i Column Densities toward Quasars and Active Galactic Nuclei Galactic H i Column Densities toward Quasars and Active Galactic Nuclei

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apjs..105..369m&link_type=abstract

Astrophysical Journal Supplement v.105, p.369

Astronomy and Astrophysics

Astronomy

168

Galaxy: Structure, Radio Lines: Ism, X-Rays: General

Scientific paper

We have determined accurate values of the Galactic neutral hydrogen column density, N_H_, toward 220 quasars and active galactic nuclei from 21 cm H I measurements made on the 140 Foot Telescope (42.7 m). Accurate values of N_H_ have now been obtained for the whole PG bright quasar sample and most quasars that have been observed by ROSAT and the Hubble Space Telescope through mid-1993. The spectra were corrected for stray 21 cm radiation yielding values of NH with a typical uncertainty of 1 x 1O^19^ cm^-2^ for high Galactic latitude directions. The H I column densities will be useful for correcting for interstellar opacity at UV and soft X-ray wavelengths, and for estimating the reddening and extinction toward these objects.

Affiliated with

Also associated with

No associations

Rating

Galactic H i Column Densities toward Quasars and Active Galactic Nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Galactic H i Column Densities toward Quasars and Active Galactic Nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic H i Column Densities toward Quasars and Active Galactic Nuclei will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1449664