The group of galaxies around 3C 275.1

Details The group of galaxies around 3C 275.1 The group of galaxies around 3C 275.1

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...334..427k&link_type=abstract

Astronomy and Astrophysics, v.334, p.427-438 (1998)

Astronomy and Astrophysics

Astrophysics

3

Galaxies: Clusters: Individual: A 98, Quasars: Individual: 3C 275.1, Cooling Flows, Galaxies: Jets, Intergalactic Medium, Radio Continuum: Galaxies

Scientific paper

We have found that the quasar 3C275.1 is located at the centre of the gravitational well of a group of galaxies characterized by relativistic radial velocity and velocity dispersion equal to 124414 and 297 km s(-1) respectively. The temperature of the ICM gas calculated from the ,,beta " model is about 6.7 *10(6) K. We suggest that there is a cooling flow in the ICM at a deposition rate of about 140 M_{sunyr(-1}) . It supplies gas to the narrow-emission line region, in which the number density is equal to 0.4 and 2.3 cm(-3) for homogeneous region and clouds of radii of 10 kpc respectively. The 1.6 GHz European VLBI Network image of the quasar core shows the elongation of radio structure at a distance ~ 40 mas from the core with a position angle about 255(deg) . It may be the result of interactions between out-flowing plasma of the QSO and the nonuniform ionized gas emitting in forbidden [OII] and [OIII] emission lines. The non-collinearity of the radio structure of 3C 275.1 might be explained by an oblique shock of the plasma jet at the interface with the halo of a neighbouring galaxy or with clouds of ionized gas.

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