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 visible expanding facts that the most epoch of galaxy formation within the universe might be at once obtainable to commentary. An gular fluctuations within the history relict radiation were detected by means of a number of ground-based tools in addition to by means of the COBE satellite tv for pc, and recommend that the epoch of galaxy formation used to be no longer so very early. mixed optical and radio reports have came across galaxies at redshifts above 2. zero, platforms that at the very least superficially express the features anticipated of enormous galaxies noticeable simply presently after their formation. And absorption traces within the spectra of quasars appear to be telling us that the majority chilly gasoline at early to intermediate cosmological epochs used to be in clouds having approximately galaxy sized lots. What types of new observations will top support us learn this excessive redshift universe in destiny? What new tools could 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 incorporated a birthday celebration (on 23 June, 1995), a commemorative quantity either the background and the way forward for the power ("The Westerbork Observa tory, carrying on with event in Radio Astronomy," Kluwer 1996), and a world workshop, held within the village of Hoogeveen on 28-30 August, 1995.
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Additional 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
62]. The HI kinematics suggest two separate components rotating in the same direction. ) remains close to the remnant suggests a retrograde-retrograde encounter between two gas-rich disks. There is an optical shell-like feature extending to the north anticorrelated with the gas in this region. 14]. This system has a single gas rich tail extending to the south with smooth kinematics, suggesting at least one gas rich progenitor experiencing a prograde encounter. There is a second optical tidal feature extending to the northeast from which we detect no H I, although this may be due to its more face-on orientation.
Coleman, P. A. W. A. M. Z. , Kriigel, E. 1994, A&A, 288, L33 Downes et al. 1992, ApJ, 398, L25 Eales et al. E. 1993, in Gravitational Lenses in the Universe, eds. Surdej et al. D. J. , lshiguro,M. I. 1991 in lAU Symposium No. Z. T. , Downes, D. Guelin. M. eau, S. J. & Tamblyn, P. , 412, 99 Rowan-Robinson et al. 1991, Nature, 351, 719 Rowan-Robinson et al. M. 1989. T. Z. P. B. T. Z. T. 1990, in Massive Stars in Starbursts, ed. C. Leitherer (Cambridge: Cambridge Univ. , Vanden Bout, P. S. M. Y.
1990) show that it is an advanced merger system. 8 X 10 10 M8 of molecular gas is found in the nuclear region (Scoville et al. 1991; Scoville et al. 1996). Like NGC 6240, Arp 220 is a bright emitter in the H2 vibrational lines. An image in this line is presented in Fig. 2, overlaid on the Hubble Space Telescope WFPCl F555W image by (Shaya et al. 1994). The H2 emission, discussed in more detail by Van der Werf & Israel (1996a) consists of two components: an extended component of faint emission following approximately the dust lane of Arp 220 and probably due to slow shocks or extended star formation in this region, and a compact component producing most of the H2 line emission.
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 by Colin A. Norman, Robert Braun (auth.), M. N. Bremer, P. P. van der Werf, H. J. A. Röttgering, C. L. Carilli (eds.)