Description:
Forum in astronomy/astrophysics research. (Moderated)
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AAS Journals
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We had an interesting discussion on publications not long ago. Here
is a recent article by our AAS President with some information on the
state of AAS journals and an idea for the future:
[link]
(I'm not expressing any opinion on the merits of the idea, only... more »
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WASP-79b: Hot Jupiter in Near-Polar Orbit
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See: [link] From Conclusions: "Conventional planetary forma-
tion models, such as core-accretion, do not pre-
dict Jovian type planets orbiting within 0.1AU
from their host star to be in highly misaligned or-
bits (Ohta et al. 2005; Winn et al. 2005). Yet
the WASP-79 planetary system joins a growing... more »
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WIMPS?
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There are no (within 95% CL)
WIMP annihilation cross sections and decay lifetimes
as measured by FERMI LAT
that could contribute to dark matter.
[link]
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Orbital rescue "tug"... how practical?
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Hi... I am not at all versed in the complexities, energy
requirements, and economics of spacecraft orbits,
either near-earth or within the overall Lagrange
orbital zoo. But the recent demise of the Kepler
spacecraft mission leads me to ask a naive question.
What would it take to develop one or more Space-... more »
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Reply to moderator's suggestion
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Back in 2005 there was no indication among mainstream researchers that
a supernova event was anything other than the demise of a star whereas
presently that perception has altered,albeit slowly,towards a more
productive line of investigation where,in certain circumstances, the
progenitor star is not destroyed but lives on.A more adventurous... more »
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Speed Of Light
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Fermi Lab (Phil Adamson) reports with their MINOS experiment
with its 735-kilometer baseline
(duplicating the OPERA experiment with scrupulous care
in controlling measuring apparatus factors)
that neutrinos travel at the speed of light,
to an accuracy of one part in a million.
The experimentally determined speed of light... more »
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open-access journals, fake & genuine
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I (and I suspect many s.a.r readers) now get a steady dribble of
unsolicited E-mails advertising new open-access journals I've never
heard of. My general reaction is that genuine journals don't need to
send out spam to persuade authors to submit papers.
In this context, there's an interesting article on fake journals in... more »
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Planck 21 March 2013
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Planck 2013 results. XVI. Cosmological parameters document:
[link]
is excellent. It shows the state of art in cosmology at its highest level.
What makes this document so powerfull is that it is easy to go to the underlying documents (using the links) to get more specific information.... more »
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WMAP and Planck comparision
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It is noted that Planck data (no error bars)
does not fall within the WMAP(9yr) error bars
although none of this was known a few years ago,
the similarity is remarkable.
WMAP(9yr) Planck
H0 (km/s/Mpc) 69.7 2.4 67.15
Omega_b 0.0462 0.0026 0.049... more »
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