Description:
Forum in astronomy/astrophysics research. (Moderated)
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The temperature of the Universe
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[[Mod. note -- The author probably meant to ask why the cosmic microwave
background radiation (CMBR, also known as CMB) has the same temperature
everywhere in the universe today.
-- jt]]
Can anyone explain why the Universe is everywhere the same
temperature. It seems to me that the expansion must be limited to the... more »
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Does Dark energy exist?
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Well, reading this blog at:
[link]
I stumbled upon this interesting paragraph:
(DE=Dark Energy)
<quote>
Indeed, DE may not even exist, resulting from integrating a supernova (SN) Ia photon's path across the universe without correctly adding the... more »
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The dark matter crisis
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Contrary to what I believed, the article of ESO that I pointed out last week is by far not the only serious article that cast doubts in the very existence of dark matter.
Another astronomer took a volume of 50Mpc around our galaxy, added all the masses of galaxies in that volume and obtained that... well, dark... more »
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superluminal possibility
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Various experiments over the years
have verified that no information travels faster than light
as appears to be the case in regards to recently negated experimental superluminal neutrino OPERA results.
In astrophysics, Blazar apparent superluminal jets are presently explained by difference in geometry of Jet vector and observer.... more »
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P. Kroupa (U Bonn): 'Standard Model of Cosmology Falsified'
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In Friday's batch of new preprints at arXiv.org is:
[link]
Title: "The dark matter crisis: falsification of the current standard
model of cosmology"
Author: Pavel Kroupa, Argelander Institute for Astronomy (U of Bonn)
Looks like a "must read" paper.
Do I detect some serious instability in the aged standard paradigm?... more »
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Helmut A. Abt: 'Many exoplanet systems probably captured'
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At the 220th Meeting of the AAS in Anchorage, 10-14 June, Helmut A.
Abt will give an oral presentation on whether exoplanet systems
typically form in the Laplacian manner (disks), or in "separate
condensations" followed by capture.
Reference: Bulletin of the AAS 44(4), 2012; session 04; talk # 121.02... more »
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Vindication of Definitive M-dwarf/Planet Prediction
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In the preprint of "The HARPS search ... XXXI. The M-dwarf sample" by
Bonfils et al,
[ [link] ] ,
Figure 1 and comments in section 8 clearly indicate an anomalously low
abundance of planets for M-dwarfs with masses below 0.25 solar mass.
The authors state: “It is striking that all planet-host stars are... more »
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