The nature of powerful compact radio galaxies

Details The nature of powerful compact radio galaxies The nature of powerful compact radio galaxies

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...362..426v&link_type=abstract

Astronomy and Astrophysics, v.362, p.426-434 (2000)

Astronomy and Astrophysics

Astrophysics

10

Galaxies: Individual: Pks 1353-341, Pks 1814-637, Pks 1934-638, Radio Lines: Galaxies

Scientific paper

Three compact powerful radio galaxies, PKS 1353- 341, PKS 1814-637 and PKS 1934-638, have been imaged. The three galaxies seem to be giant ellipticals, the last two being bluer than normal gEs by 0.2-0.3 mag in B-I, which is expected if they are the result of recent merging. HI absorption has been detected in all three objects with very different characteristics. The broad absorption in PKS 1353 -341 probably takes place in a torus or a disk with a radius of at least a few tens of pc. For PKS 1814-637 the principal absorption is less broad and the disk radius more likely a few hundreds of pc. The absorption in PKS 1934-638 is very narrow and is probably due to gas not directly connected to the central engine. Data for a dozen of powerful radio galaxies with H I absorption are reviewed. Such absorption seems to be particularly common at high radio power. Based on observations obtained with the Australia Telescope and the 3.6m and NTT telescopes of ESO La Silla (Chile)

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