Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Heinz Tiersch"'
Publikováno v:
Astronomische Nachrichten: News in Astronomy and Astrophysics. 319:235-238
We have completed an investigation (preliminary results for which were reported in Oleak et al. 1995) into the shapes of Shakhbazian compact groups of galaxies. Ellipticites for 299 groups in the Shakhbazian survey have been examined using the techni
Publikováno v:
Astronomische Nachrichten: A Journal on all Fields of Astronomy. 317:239-257
Publikováno v:
Astronomische Nachrichten. 316:143-148
The characteristics of galaxies within galaxy groups are investigated as a function of the surroundings. It is shown that the relative number of the galaxies with different morphological type is correlated with the number of members within the group,
Publikováno v:
Astronomische Nachrichten. 316:381-385
A sample of galaxy groups is investigated for the occurence of Seyfert objects within them. The velocity dispersion in groups with Seyfert galaxies is significantly larger than in groups without Seyfert galaxies. But there was not found any correlati
Publikováno v:
Astronomische Nachrichten. 315:11-61
Publikováno v:
Astronomische Nachrichten: A Journal on all Fields of Astronomy. 314:317-360
Compact groups of galaxies are fruitful laboratories to study such processes as dynamical friction, tidal interaction, collision, and galaxy mergers. The largest survey of compact galaxy groups is the one of Shakhbazian, Petrosian, Baier, Tiersch. A
Publikováno v:
Astronomische Nachrichten: A Journal on all Fields of Astronomy. 312:149-160
The structure of the centre of the galaxy cluster A 1795 and its surroundings, representing different cluster components, has been investigated in several wavelength ranges. A preferred orientation deviating about 10–20° from the north-south direc
Publikováno v:
Astronomische Nachrichten: A Journal on all Fields of Astronomy. 311:89-97
A detailed reinvestigation of the Coma cluster basing on enlarged observational material of number density distributions and radial velocities of galaxies as well as radio and x-ray data is performed and supports our previous conclusion that this clu
Publikováno v:
Astrophysics. 38:364-366
The characteristics of galaxies within the galaxy groups are investigated from the point of view of the influence of the surroundings.
Publikováno v:
Symposium - International Astronomical Union. 161:623-625
X-ray emission has been detected from 12 compact groups of galaxies of the Shakhbazian catalogue (out of 27 investigated groups) with the ROSAT PSPC all-sky survey. The groups Shkh 30 (Shakhbazian 1973) and Shkh 360 (Petrosian 1978) are presented her