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"THE UNIVERSE AS SEEN BY ISO"
-----------------------------
Latest ISO results to be presented at an International meeting in Paris
- 20-23 October
Nearly 400 hundred infrared astronomers will attend a conference in
Paris from October the 20th to the 23rd to review and discuss the latest
results from the European Infrared Space Telescope, ISO. This will be
the first major scientific conference devoted to ISO since the end of
its in-orbit mission last May. Thus, it's a long-awaited occasion for
the scientists to come to conclusions and start picturing the infrared
face of the universe in detail.
The meeting, entitled "The Universe as seen by ISO", will be held at
UNESCO, Place de Fontenoy, 75007-PARIS where nearly 300 scientific
papers ranging over all fields of Astronomy, from Solar System to
Cosmology, will be presented and analysed by infrared astronomers.
Press interested in the ISO results presentations are invited to attend
the conference and to contact Monica Salomone, the ISO press
representative at the registration desk.
For further information, please contact: ESA Public Relations Division
Tel: +33(0)1.53.69.7155 Fax: +33(0)1.53.69.7690
Background The infrared universe is relatively poorly known because
infrared light comes from dusty and cold regions that are invisible to
other telescopes. ISO, the best infrared space telescope so far, finally
has swept away the dust and seen all the way through. ISO scientists,
therefore, are ready for surprises. The recent discovery by ISO of the
presence of water throughout the universe was already a hint of what is
still to come. More findings can be expected from this meeting, and a
few results are already summarized below.
Rings of Andromeda "ISO unveils the hidden rings of Andromeda "
The Andromeda galaxy, one of the closest companions of our own galaxy,
has been hiding from the astronomers' eyes one of its secrets: while
always considered a typical spiral galaxy, ISO sees it now as a
spectacular ringed galaxy. Andromeda is thus structured in multiple
concentric rings, made of very cold dust --at about -260 degree C--. The
cold dust cannot be seen by optical telescopes, that's the reason why
the rings have always remained hidden in the common views of the galaxy.
The new data suggest that Andromeda might be undergoing a transition
phase to become a ringed galaxy which would be seen as such also by
conventional telescopes in the distant future
Gravitational arcs "ISO detects the first known infrared bright
gravitational arcs and shows distant young galaxies in collision"
ISO has detected the first known infrared-bright gravitational arcs,
which may be the distorted and magnified images of distant young
galaxies in collision. Before ISO no gravitational arc had been detected
at these wavelengths, so these results make a nice victory for those
who, against all pessimistic predictions, bet on ISO's sensitivity to
detect gravitational arcs by infrared light. The newly-observed arcs
number more than thirty, and the galaxies they reveal are some of the
farthest objects ever seen in the mid-infrared. To all other telescopes
these objects have remained deeply obscured by dust. This means that ISO
is unveiling the hidden side of the early universe, the processes that
took place when the cosmos was about one third of its present age or
even younger.
Ring of organic matter ISO sees a ring of organic matter surrounding a
star"
A huge ring of organic matter surrounding a young star has been observed
by ISO. This kind of structure has never been detected before. With this
finding ISO shows again a clear example of how the stars and their
environment work as the Nature's chemical factories: not only water is
being produced there --as ISO demonstrated--, but also complex organic
molecules are present; these molecules are, essentially, the basic
building blocks of all living organisms.
More information on these results is available at the ESA Science
web-pages (http//www.sci.esa.int/iso) and the ISO web site:
http://www.iso.vilspa.esa.es.
About ISO ISO was put into orbit in November 1995, by an Ariane 44P
launcher from the European space base at Kourou in French Guiana. As an
unprecedented observatory for infrared astronomy, able to examine cool
and hidden places in the Universe, ISO successfully made more than
26,000 scientific observations. The liquid helium supply, used to cool
the telescope and instruments close to the absolute zero of temperature,
lasted almost a year longer than expected, but ran out on 8 April 1998
(see ESA Press Information Note No. 11-98 of 9 April).
Daily information from the meeting Daily updated information on the
results being presented in the conference will be available on the ESA
Science web pages : (http://www.sci.esa.int ) and the ISO web pages
(http://www.iso.vilspa.esa.es), where pictures and background
information on ISO are also available.
.
Greetings from Hans at Maarssenbroek ³~ The Netherlands
HomebBs : PI8WNO × .
E-Mail : pd0rdd@hj-lammers.demon.nl ××׶ Úп
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