Cold Gas at High Redshift: Proceedings of a Workshop by Colin A. Norman, Robert Braun (auth.), M. N. Bremer, P. P.

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By Colin A. Norman, Robert Braun (auth.), M. N. Bremer, P. P. van der Werf, H. J. A. Röttgering, C. L. Carilli (eds.)

Recent years have obvious expanding proof that the most epoch of galaxy formation within the universe might be at once available to statement. An­ gular fluctuations within the history relict radiation were detected by way of quite a few ground-based tools in addition to via the COBE satellite tv for pc, and recommend that the epoch of galaxy formation was once no longer so very early. mixed optical and radio experiences have chanced on galaxies at redshifts above 2. zero, platforms that at the very least superficially convey the features anticipated of enormous galaxies visible in simple terms almost immediately after their formation. And absorption strains within the spectra of quasars appear to be telling us that almost all chilly gasoline at early to intermediate cosmological epochs used to be in clouds having approximately galaxy sized lots. What varieties of new observations will most sensible support us learn this excessive redshift universe in destiny? What new tools should be wanted? those are questions that loom huge within the minds of the Dutch astronom­ ical group as we have a good time 25 years of operation of the Westerbork Synthesis Radio Telescope. get together of this Silver Jubilee has integrated a party (on 23 June, 1995), a commemorative quantity taking a look at either the historical past and the way forward for the power ("The Westerbork Observa­ tory, carrying on with experience in Radio Astronomy," Kluwer 1996), and a world workshop, held within the village of Hoogeveen on 28-30 August, 1995.

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Extra resources for Cold Gas at High Redshift: Proceedings of a Workshop Celebrating the 25th Anniversary of the Westerbork Synthesis Radio Telescope, held in Hoogeveen, The Netherlands, August 28–30, 1995

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1995). The cross marks the VLA radio source position. An extended component with a narrow line width is found in V=+45 km/s channel. optical light, suggesting the CO emitting region is very compact and arises close to the quasar. In CO, the relative brightnesses of the four images seen in the optical varies as a function of velocity and thus the CO enables one to "map" the molecules within the host galaxy, given a suitable model for the lensing. The model presented by Yun et al. (1995) places the molecular gas in a disk within 1 kpc of the quasar nucleus.

Thompson et aZ. 1995; Thompson & Djorgovski 1995). 6. Searches for Ha emission in the K-band are already underway and will obviously profit tremendously from the new generation of 8 m class telescopes equipped with large-format near-IR array cameras. Finally, one of the most exciting prospects is the possibility of finding high-red shift starburst galaxies through their redshifted dust emission. The order-of-magnitude increase of sensitivity that will be provided by the SCUBA instrument on the James Clerk Maxwell Telescope may enable the decisive breakthrough in searches for dusty high redshift starburst galaxies.

The H I morphology is radically different from the starlight, with a narrow tidal filament without any apparent optical feature stretching 150 kpc to the north and containing 2x 109 Me of atomic gas. This filament suggest a very old encounter age (",750 Myr) for this very young starburst ('" 20 Myr; Augarde & Lequeux 1985, A&A, 147,273). Back in the main body, there is over 4x10 9 M e of HI associated 50 J. E. HIBBARD AND M. S. YUN Figure 1. Arp 220 and Arp 299 HI DISTRIBUTION IN LIR GALAXIES Figure 2.

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