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Where have I been ? November 4, 2007

Posted by dorigo in personal, travel.

Four days without blogging. An incredible feat, made possible by the less-than-optimal wireless connection provided by Vodafone. But indeed, I was much more in the mood for enjoying four days of vacation than discussing physics or other matters here…

I have collected in the slideshow below a few images that summarize the past few days I spent in Padola with my family. The weather was fantastic: clear, not cold, wonderfully crystalline skies day and night, for our whole stay. We exploited it with a few nice walks in the woods, and a couple of observing sessions at night – which included a real star-party we managed to organize in a nearby dark site.

In the pictures below you get to see:

  • DSC4516: Filippo and Ilaria on a trail, on Thursday afternoon.
  • DSC4527: Filippo tries a long jump.
  • DSC4534: The mountains toward the south, with punta Crissin, from woods close to Danta di Cadore.
  • DSC4538: On Thursday evening I spent a few hours in front of our house in Padola with my 16″ dob. I also fiddled with the camera to image the glorious comet… Here you see Perseus with comet 17P/Holmes through a nikkor 55mm f1.2 lens. 
  • DSC4545: On Friday we had a walk near Alpe Coltrondo. Here a peaceful exchange of snow took place between Filippo and Ilaria.
  • DSC4551: a view from the whereabouts of Alpe Coltrondo towards the north. 
  • DSC4553: Filippo carries up the slope some precious snow he fetched in a shady spot below, to build a couple of snowmen.
  • DSC4559: The snowmen with their makers.
  • DSC4566: On Friday evening I went to the star party at Casera Razzo. There, I met some ten other amateur astronomers, and we observed several faint objects as well as the usual showpieces. In the picture you see a view of Cygnus with the 55mm nikkor f1.2 lens. You can see part of the milky way and a hint of the North America nebula. Please note that the picture is of low quality because I only took it to monitor the sky darkness – with the pixel readings you can in fact obtain the average magnitude per squared arcsecond of the night sky…
  • DSC4579: on Saturday we hiked to Malga Nemes, a very nice and lonely path with wonderful landscapes. 
  • DSC4582: Mariarosa and Ilaria.
  • DSC4584: Mariarosa and Ilaria near a creek. The mountains on the background are at the border with Austria.
  • DSC4589: Filippo with the same background. 
  • DSC4591: another nice view of the mountains. On the right Col Quaterna’ (2504 m), whose top Filippo and I visited a couple of times.


1. Quantoken - November 5, 2007

Regarding the “most precise measurement” of top quark mass. From my own theory research I have long ago derived that the precise theoretical mass of the top quark is exactly:

2*PI^2*5^3 * M0 = 250 * PI^2 * M0

M0 is the fundamental mass unit so that the electron mass:

Me = alpha * M0 = M0 / 137.03599911

The precise value is 172.7804 GeV

Verify that using your calculator.

2. dorigo - November 5, 2007

Hi quantoken,

too lazy to verify the numbers, I trust you on that. To me, that 2×5^3 factor is no less mysterious than 172.7 or 137.03 though.

Given that you inserted one free parameter (250) to fit one data point (M_top), I see no particular reason to get excited. Try finding a single parameter and a single rule to fit m_e, m_mu, m_tau, and m_top together. That would be something.


3. Alejandro Rivero - November 5, 2007

Quantoken has some unability to express himself, but as far as I have seen he and some others orbit around traditional, well known equations but they seem not to know about them. Sometimes about large number Dirac hypothesis, involving newton and hubble constants; sometimes about electron self energy, involving a logarithm or an exponential of m/M, with M being the ultimate cutoff, Planck Mass. Sometimes, finally, about 1960 equations as in this case, where M0 is about one half of the mass of the pion, thus about 70 MeV. This was worked out by McGregor, who even had “70 MeV” in its car license plate.

4. dorigo - November 5, 2007

Hah! How much does it make in H.P.’s ?

About the formulas, yes, 70 MeV is quite an interesting number – around that value lie the muon mass, the pion mass, the strange quark mass. One day humanity will know – I have little doubt about that – but will we still be alive ? Oh well, hand me another beer…


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