Leiden 29 Nov 2001Harry van der Laan Symposium From Radio to X-ray Galaxy-Cluster-Galaxy From 1973  Lectures Ph D. thesis Radio Investigations of Cluster.

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Presentation transcript:

Leiden 29 Nov 2001Harry van der Laan Symposium From Radio to X-ray Galaxy-Cluster-Galaxy From 1973  Lectures Ph D. thesis Radio Investigations of Cluster of Galaxies Notion: “reality is the scientific system we operate”

Leiden 29 Nov 2001Harry van der Laan Symposium Die Phänomenologie des Geistes Hegel 1807: “ The true form in which reality exists can only be the scientific system of the reality” Let us now focus on the system

Leiden 29 Nov 2001Harry van der Laan Symposium 1976:Coma Cluster 610 MHz

Leiden 29 Nov 2001Harry van der Laan Symposium COMA CLUSTER 1415 MHz - Giant ellipticals - Head-tail - moving - Confinement ICM - Energy losses Diffusion -Static thermal press.  match X-ray

Leiden 29 Nov 2001Harry van der Laan Symposium cluster radio galaxies -RLF radio galaxies RLF Jaffe,Perola - dependency optical - fractions –chance - On-off - all are radio - identical environment

Leiden 29 Nov 2001Harry van der Laan Symposium HERCULES SUPERCLUSTER 1978

Leiden 29 Nov 2001Harry van der Laan Symposium 1981 EINSTEIN X-ray HvdL: NL input Haloes cD Galaxies Cooling flows Pressure driven Bondi- gravitational accretion

Leiden 29 Nov 2001Harry van der Laan Symposium Trivariate LF W. Bijleveld cDs- rich clusters - groups

Leiden 29 Nov 2001Harry van der Laan Symposium Search for condensations 1984 La Palma: Optical filaments Dumbbell galaxies mass kpc relative velocities

Leiden 29 Nov 2001Harry van der Laan Symposium 1985: Inauguracion de los Observatorios Astrofisicos de Canarias

Leiden 29 Nov 2001Harry van der Laan Symposium 1985: Inauguracion de los Observatorios Astrofisicos de Canarias El Rey D. Juan Carlos I : “ The prayer is that each man and each society must renounce interests that divide us and come together in others which, by overcoming difficulties, will make us greater and better day by day, linked in brotherhood beneath the same skies, conscious of the harmony of the peace of the galaxies ”

Leiden 29 Nov 2001Harry van der Laan Symposium 1989 ESO – LV support by HvdL galaxy catalogue only few % E 1990: spirals much more extinction 1998:ISO- SWS much more H 2 NGC K cm -2

Leiden 29 Nov 2001Harry van der Laan Symposium ROSAT COMA

Leiden 29 Nov 2001Harry van der Laan Symposium XMM- Newton mosaic EPIC- pn camera 5 arcsec

Leiden 29 Nov 2001Harry van der Laan Symposium Abell 1795 cD

Leiden 29 Nov 2001Harry van der Laan Symposium NGC Hubble

Leiden 29 Nov 2001Harry van der Laan Symposium 2001: XMM- M87 N1275 A1795 Isothermal No HI columns Low mass deposition rate in the centres Heating by AGN ergs/s Bondi accretion Self-regulating rs on- accretion off rs off- accretion on Böhringer et al- spectroscopy Fe L shell lines 1keV 1-2’ halo M87

Leiden 29 Nov 2001Harry van der Laan Symposium VLT ANTU ISAAC Narrow-band ~1% 2.07 mm EW > 50 A Confirming spectra needed Forming CD? 160 kpc Ly  ALL SIGNS OF PROTO- CLUSTER Z ~ 2.2 Kurk Miley Röttgering Venemans

Leiden 29 Nov 2001Harry van der Laan Symposium at z ~ 4.1Venemans et al. 7’ x 7’ VLT/FORS FIELD Red: receding Blue: approaching 21 Ly  Emitters  v ~ 400 km/s  Radio Galaxy Most distant structure of galaxies known Ancestor of rich cluster?

Leiden 29 Nov 2001Harry van der Laan Symposium

Leiden 29 Nov 2001Harry van der Laan Symposium Z= galaxy lensed by A2218 at z=0.18 Keck II spectroscopy Ly- alpha emitting I ~ 30 (unlensed) Magnification ~30 Size ~0.2 kpc ~10 6 M SUN Ellis, Santos, Kneib, Kuijken

Leiden 29 Nov 2001Harry van der Laan Symposium Wholeness and the implicate order The streaming river of developing knowledge David Bohm 1980: “ So, instead of supposing that older theories are falsified at a certain point in time, we merely say that man is continually developing new forms of insight, which are clear up to a point and then tend to become unclear. In this activity, there is evidently no reason to suppose that there is a or will be a final insight (corresponding to truth) or even a steady series of approximations to this”

Leiden 29 Nov 2001Harry van der Laan Symposium CFHT 12 K COMA cluster

Leiden 29 Nov 2001Harry van der Laan Symposium The future - ASTRO-WISE Large scale structure Superclusters Cosmic shear 10’s Terabytes of galaxy data Stop copying the Universe Static catalogues  Dynamic AVO System determines knowledge and reality VLT-Survey Telescope VST