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Thread: Mysteries in Astronomy (my short list)

  1. #61
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    Quote Originally Posted by antoniseb View Post
    I think better still would be at the L4 & L5 points for Venus.
    Venus Equilateral? Whatever works, do it.
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    — Mark Twain, Life on the Mississippi (1883)

  2. #62
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    Here is another: What happened to Wilhelm Albrecht Oeltzen? He is known for the processing of a part of Friedrich Wilhelm August Argelander's Zones from 1849-1852 in Bonn Germany. Often these are labeled "A. Oe." or "AOe" in catalogs. This was a two step process, I am uncertain if the abbreviations differentiate the two projects. In 1875, he disappeared. I have been unable to find any reference to what he was doing at that time.

    Since the 1870s are an interesting time period, it would be no surprise that the man simply passed away of natural causes, far from home.

    Edit: Hey! It took me a while to research this, why don't I post the key highlights of that work?

    Born on Oct 2nd, 1824.
    Studied at University of Göttingen in 1846.
    First Assistant at Vienna Observatory 1849-1859, before moving to The Paris Observatory.
    The Oeltzen's catalogue of Argelander's Southern Zones. 1857-58.
    The Oeltzen's catalogue of Argelander's Northern Zones. 1851-52.
    Schwerd's Beobachtungen von Circumpolarsternen in mittleren Positionen published in 1856, with Friedrich Magnus Schwerd.
    "Disappeared" in 1875.
    Solfe

  3. #63
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    Back to the ANITA anomaly:

    https://arxiv.org/abs/1907.06308

    The pros and cons of beyond standard model interpretations of ANITA events
    L. A. Anchordoqui, I. Antoniadis, V. Barger, F. Cornet, C. García Canal, M. Gutiérrez, J. I. Illana, J. G. Learned, D. Marfatia, M. Masip, S. Pakvasa, S. Palomares-Ruiz, J. F. Soriano, T. J. Weiler (Submitted on 15 Jul 2019)

    The Antarctic Impulsive Transient Antenna (ANITA) experiment has observed two air shower events with energy ∼500 PeV emerging from the Earth with exit angles ∼30∘ above the horizon. As was immediately noted by the ANITA Collaboration, these events (in principle) could originate in the atmospheric decay of an upgoing τ-lepton produced through a charged current interaction of a ντ inside the Earth. However, the relatively steep arrival angles of these perplexing events create tension with the standard model (SM) neutrino-nucleon interaction cross section. Deepening the conundrum, the IceCube neutrino telescope and the Pierre Auger Observatory with substantially larger exposures to cosmic ντ's in this energy range have not observed any events. This lack of observation implies that the messenger particle (MP) giving rise to ANITA events must produce an air shower event rate at least a factor of 40 larger than that produced by a flux of τ-neutrinos to avoid conflicts with the upper limits reported by the IceCube and the Pierre Auger collaborations. In addition, the sensitivity of ANITA to MP-induced events must be comparable to or larger than those of IceCube and Auger to avoid conflict with the non-observation of any signal at these facilities. Beyond SM interpretations of ANITA events can be classified according to whether the MPs: (i) live inside the Earth, (ii) originate in neutrino-nucleon collisions inside the Earth, (iii) come from cosmological distances. In this communication we investigate the positive and negative facets of these three classes of models.
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    — Mark Twain, Life on the Mississippi (1883)

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