英国《Nature》目录要览：2010-04-01出版
时间：2010-04-02 阅读： 我要评论:
http://www.nature.com/nature/journal/v464/n7289/full/nature08893.html
----------------------
LETTERS
----------------------
Intense star formation within resolved compact regions in a galaxy at z =
2.3
pp733-736
Massive galaxies in the early Universe have been shown to be forming stars
at
high rates. Probing the properties of individual star-forming regions is
beyond
the resolution and sensitivity of existing telescopes. Here, however,
observations
are reported of the galaxy SMMJ2135-0102 at redshift z=2.3259, which has
been
gravitationally magnified by a factor of 32 by a galaxy cluster lens in the
foreground. The physics underlying star formation here is similar to that in
local galaxies, but the energetics are very different.
A. M. Swinbank et al.
doi:10.1038/nature08880
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08880.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08880.html
Generation of electron beams carrying orbital angular momentum pp737-739
Light beams can be engineered to carry orbital angular momentum, with
application as, for instance, optical 'spanners' - essentially a
'twisted' variant of the more familiar optical tweezers. Here it is shown
that it is, in principle, possible to engineer similar behaviour into an
electron beam. Such a beam could find use in a variety of spectroscopy and
microscopy techniques.
Masaya Uchida and Akira Tonomura
doi:10.1038/nature08904
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08904.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08904.html
Identification of Younger Dryas outburst flood path from Lake Agassiz to
the Arctic Ocean pp740-743
Our current concepts of abrupt climate change are influenced by
palaeoclimate
evidence for events such as the Younger Dryas cold interval, in which
massive
climate changes occurred essentially instantaneously. It is thought that an
injection of fresh water from the retreating Laurentide Ice Sheet altered
the
Atlantic meridional overturning circulation and triggered the Younger Dryas,
but convincing geological evidence has been elusive. Here, a major flood
event
that is chronologically consistent with the Younger Dryas has been
identified-through the MacKenzie River into the Arctic Ocean.
Julian B. Murton et al.
doi:10.1038/nature08954
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08954.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08954.html
No climate paradox under the faint early Sun pp744-747
It has been inferred that, during the Archaean eon, there must have been a
----------------------
LETTERS
----------------------
Intense star formation within resolved compact regions in a galaxy at z =
2.3
pp733-736
Massive galaxies in the early Universe have been shown to be forming stars
at
high rates. Probing the properties of individual star-forming regions is
beyond
the resolution and sensitivity of existing telescopes. Here, however,
observations
are reported of the galaxy SMMJ2135-0102 at redshift z=2.3259, which has
been
gravitationally magnified by a factor of 32 by a galaxy cluster lens in the
foreground. The physics underlying star formation here is similar to that in
local galaxies, but the energetics are very different.
A. M. Swinbank et al.
doi:10.1038/nature08880
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08880.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08880.html
Generation of electron beams carrying orbital angular momentum pp737-739
Light beams can be engineered to carry orbital angular momentum, with
application as, for instance, optical 'spanners' - essentially a
'twisted' variant of the more familiar optical tweezers. Here it is shown
that it is, in principle, possible to engineer similar behaviour into an
electron beam. Such a beam could find use in a variety of spectroscopy and
microscopy techniques.
Masaya Uchida and Akira Tonomura
doi:10.1038/nature08904
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08904.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08904.html
Identification of Younger Dryas outburst flood path from Lake Agassiz to
the Arctic Ocean pp740-743
Our current concepts of abrupt climate change are influenced by
palaeoclimate
evidence for events such as the Younger Dryas cold interval, in which
massive
climate changes occurred essentially instantaneously. It is thought that an
injection of fresh water from the retreating Laurentide Ice Sheet altered
the
Atlantic meridional overturning circulation and triggered the Younger Dryas,
but convincing geological evidence has been elusive. Here, a major flood
event
that is chronologically consistent with the Younger Dryas has been
identified-through the MacKenzie River into the Arctic Ocean.
Julian B. Murton et al.
doi:10.1038/nature08954
Abstract:
http://www.nature.com/nature/journal/v464/n7289/abs/nature08954.html
Article:
http://www.nature.com/nature/journal/v464/n7289/full/nature08954.html
No climate paradox under the faint early Sun pp744-747
It has been inferred that, during the Archaean eon, there must have been a
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