Zobrazeno 1 - 10
of 193
pro vyhledávání: '"Neuhäuser, Ralph"'
Autor:
Neuhäuser, Ralph, Torres, Guillermo, Mugrauer, Markus, Neuhäuser, Dagmar L., Chapman, Jesse, Luge, Daniela, Cosci, Matteo
Publikováno v:
MNRAS 2022
After core hydrogen burning, massive stars evolve from blue-white dwarfs to red supergiants by expanding, brightening, and cooling within few millennia. We discuss a previously neglected constraint on mass, age, and evolutionary state of Betelgeuse a
Externí odkaz:
http://arxiv.org/abs/2207.04702
Publikováno v:
2020, MNRAS 501, L1-L6
Galactic novae and supernovae can be studied by utilizing historical observations, yielding explosion time, location on sky~etc. Recent publications by Hoffmann & Vogt present CVs, supernova remnants, planetary nebulae etc. as potential counterparts
Externí odkaz:
http://arxiv.org/abs/2012.06285
The detection of $\sim 1.5-3.2$ Myr old $^{60}$Fe on Earth indicates recent nearby core-collapse supernovae. For supernovae in multiple stars, the primary stars may become neutron stars, while former companions may become unbound and become runaway s
Externí odkaz:
http://arxiv.org/abs/1909.06850
Akademický článek
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Publikováno v:
Journal for the History of Astronomy 47, 136, 2016
From his observations of the A.D. 1572 super-nova and the A.D. 1577 comet, Tycho Brahe concluded that such transient celestial objects are outside the Earth's atmosphere, and he quoted the 9th century A.D. Persian astrologer and astronomer Abu Mashar
Externí odkaz:
http://arxiv.org/abs/1607.05032
Autor:
Neuhaeuser, Ralph, Neuhaeuser, Dagmar, Rada, Wafiq, Chapman, Jesse, Luge, Daniela, Kunitzsch, Paul
The recently published Yemeni observing report about SN 1006 from al-Yamani clearly gives AD 1006 Apr $17 \pm 2$ (mid-Rajab 396h) as first observation date. Since this is about 1.5 weeks earlier than the otherwise earliest reports (Apr 28 or 30) as d
Externí odkaz:
http://arxiv.org/abs/1607.02915
We present here an Arabic report about supernova 1006 (SN 1006) written by the famous Persian scholar Ibn Sina (Lat. Avicenna, AD 980-1037), which was not discussed in astronomical literature before. The short observational report about a new star is
Externí odkaz:
http://arxiv.org/abs/1604.03798
Hoyt & Schatten (1998) claim that Simon Marius would have observed the sun from 1617 Jun 7 to 1618 Dec 31 (Gregorian calendar) all days, except three short gaps in 1618, but would never have detected a sunspot -- based on a quotation from Marius in W
Externí odkaz:
http://arxiv.org/abs/1604.03724
We present the physical and geometrical parameters of the individual components of the close visual double-lined spectroscopic binary system Gliese 762.1, which were estimated using Al-Wardat's complex method for analyzing close visual binary systems
Externí odkaz:
http://arxiv.org/abs/1603.03852
Autor:
Neuhaeuser, Dagmar, Neuhaeuser, Ralph
The interpretation of the strong 14-C variation around AD 775 as one (or several) solar super-flare(s) by, e.g., Usoskin et al. (2013) is based on alleged aurora sightings in the mid AD 770s in Europe: A "red cross/crucifix" in AD 773/4/6 from the An
Externí odkaz:
http://arxiv.org/abs/1508.07955