CHE SIGNIFICA SHELL STAR IN INGLESE
Stella di Shell
Una stella di shell, chiamata anche variabile Gamma Cassiopeiae, è una stella che ha uno spettro che presenta caratteristiche che indicano un disco circolare di gas che circonda la stella all'equatore. Esse presentano variazioni irregolari nella loro luminosità a causa del deflusso della materia. Le stelle delle conchiglie sono rotanti veloci, dando una spiegazione parziale sul meccanismo, ma le stelle delle conchiglie sono ancora considerate enigmatiche. Le stelle di Shell appartengono a tipi spettrali da O7.5 a F5, ma i loro spettri sono caratterizzati da linee di assorbimento enormemente allargate a causa della rotazione veloce e del disco che contribuisce anche ad altre peculiarità spettrali. Le velocità di rotazione sono di circa 200-250 km / s, non lontano dal punto in cui l'accelerazione rotazionale disturberebbe la stella. Gli spettri e le qualità generali delle stelle delle shell sono difficili da interpretare, poiché le caratteristiche spettrali normali sono sovrapposte con emissioni variabili, in modo che la classe di luminosità e la classe spettrale esatta possono essere facilmente interpretati male.
definizione di shell star nel dizionario inglese
La definizione di stella di shell nel dizionario è un tipo di stella, di solito di tipo spettrale da B a F, circondato da una shell gassosa.
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10 LIBRI IN INGLESE ASSOCIATI CON «SHELL STAR»
Scopri l'uso di
shell star nella seguente selezione bibliografica. Libri associati con
shell star e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Stellar Spectral Classification
There are A-type shell stars, even early-F shell stars, but their numbers are
relatively small. We term the type of shell star described in the paragraphs above
a classical A-type shell star. The mechanism producing these shells is still
unknown, ...
Richard O. Gray, Christopher J. Corbally,
2009
In 1952 Paul W. Merrill noted that it "is not a typical shell star, but rather an object
intermediate between an ordinary Be star and a planetary nebula. Perhaps it can
be thought of as a shell star whose outer atmosphere is extraordinarily ...
3
Mesoamerica After the Decline of Teotihuacan, A.D. 700-900
During this time disjunction occurs as the Teotihuacan star is transformed and
absorbed into a Maya star motif which becomes part of the Maya shell-star glyph
associated with death, war, sacrifice, and Venus. The shell-star glyph is often ...
Richard A. Diehl, Janet Catherine Berlo,
1989
4
An Introduction to Astrophysics
So whether a particular B star will appear as a normal B, a Be or a shell star
depends on the presence or absence of some particular entity surrounding the
star; that is the amount of material penetrated by the line of sight through the
envelope ...
5
Geological Survey of Canada, Open File 1945
It is interesting that one of the stars studied was a binary star, the companion of
the Wolf-Rayet being a shell star, a class to which we will come shortly. In
another of the stars studied she found that the shell was expanding at a rate of
3000 ...
6
Star Gods of the Maya: Astronomy in Art, Folklore, and Calendars
compound known as the “shell star,” which is associated with warfare (Fig. 5.70).
After studying twenty-five shell-star dates, Arthur Schlak (1996:186, table 1)
concluded that all refer to a time when Venus was moving slowly relative to the
Sun, ...
MODEL NAME Sportsman 314 Dart Nipigon Sportsman 315 315 Deluxe Shell
Star 08 Shell Star l/0 Caliente 0B Caliente l/O Shell Star 08 Shell Star l/O Corsair
05 Corsair l/0 Shell Star President SL 235 X SL 235 C LENGTH 13'9" 14'1" 14'1"
...
8
Spectroscopic Astrophysics: An Assessment of the ...
In a shell star, on the other hand, although the absolute strengths of some of the
lines are similar to those in supergiants, the continuous opacity is much reduced
and one can see through to the deeper layers of the star where the Stark ...
9
Triggered
Star Formation in a Turbulent Interstellar Medium ...
Dotted circle indicates the Cepheus flare shell, star symbols show the members
of the SU Cas association and other late B-early A type stars located at a
distance of about 250 pc. Positions of some molecular clouds are also indicated.
Bruce G. Elmegreen, Jan Palous,
2007
10
A Dictionary of Astronomy
Shell galaxies may be the result of a giant elliptical digesting a low-mass
companion galaxy. shell star A main-sequence star with a spectral type in the
range B-F whose spectrum contains prominent narrow absorption lines
originating in ...