RXJ1716.6+6708: a protocluster at z=0.81?
| dc.creator | Gioia, Isabella M. | |
| dc.date | 1999-10-13 | |
| dc.date.accessioned | 2026-07-07T02:33:49Z | |
| dc.date.available | 2026-07-07T02:33:49Z | |
| dc.description | At z=0.809, RXJ1716.6+6708 is the second most distant X-ray selected cluster so far published and the only one with a large number of spectroscopically determined cluster member velocities. The optical morphology of RXJ1716.6+6708 resembles an inverted S-shape filament with the X-rays coming from the midpoint of the filament. The ROSAT HRI contours have an elongated shape that roughly coincide with the weak lensing contours. ASCA measures a low temperature, kT=5.7 keV. Keck-II LRIS spectra indicate a very high velocity dispersion, of sigma(v)=1522 km/s. While the temperature is commensurate with its X-ray luminosity, its velocity dispersion is much higher than expected from the sigma(v)-T(X) relationship of present-day clusters with comparable X-ray luminosity. RXJ1716.6+6708 could be an example of a protocluster, where matter is flowing along filaments and the X-ray flux is maximum at the impact point of the colliding streams of matter. | |
| dc.description | 5 pages, 2 jpeg files. To appear in "Clustering At High Redshift" Marseille (France), Jun 29 to Jul 2 1999 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9910232 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9910232 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14998 | |
| dc.subject | Astrophysics | |
| dc.title | RXJ1716.6+6708: a protocluster at z=0.81? | |
| dc.type | text |