CHE SIGNIFICA SPECTRAL TYPE IN INGLESE
Classificazione stellare
Nell'astronomia, la classificazione stellare è la classificazione delle stelle basate sulle loro caratteristiche spettrali. La luce della stella viene analizzata dividendola con un prisma o una griglia di diffrazione in uno spettro che mostra l'arcobaleno di colori interspersi con linee di assorbimento. Ogni linea indica un ione di un certo elemento chimico, con la forza della linea che indica l'abbondanza di quel ione. L'abbondanza relativa dei diversi ioni varia con la temperatura della fotosfera. La classe spettrale di una stella è un breve codice che riassume lo stato di ionizzazione, dando una misura oggettiva della temperatura e della densità della fotosfera. La maggior parte delle stelle sono attualmente classificate sotto il sistema Morgan-Keenan utilizzando le lettere O, B, A, F, G, K, M, L, T e Y, una sequenza dal più caldo al più fresco. I tipi R e N sono stelle a base di carbonio e il tipo S è stelle a base di zirconio monossido. Ogni classe di lettere viene quindi suddivisa utilizzando una cifra numerica con 0 che è più calda e 9 è più fresca.
definizione di spectral type nel dizionario inglese
La definizione di tipo spettrale nel dizionario è uno dei vari gruppi in cui le stelle sono classificate in base a linee e bande spettrali caratteristiche. La classificazione più importante ha una serie di classi O, B, A, F, G, K, M, anche la serie è una scala di temperatura superficiale decrescente.
PAROLE IN INGLESE ASSOCIATE CON «SPECTRAL TYPE»
spectral type ·
spectral ·
type ·
stars ·
regulus ·
mnemonic ·
astronomy ·
stellar ·
classification ·
based ·
their ·
characteristics ·
light ·
from ·
star ·
analyzed ·
splitting ·
with ·
prism ·
diffraction ·
grating ·
into ·
spectrum ·
exhibiting ·
rainbow ·
colours ·
interspersed ·
absorption ·
lines ·
each ·
hyperphysics ·
surface ·
temperatures ·
determined ·
wien ·
displacement ·
this ·
poses ·
practical ·
difficulties ·
absolute ·
magnitude ·
luminosity ·
solar ·
luminosities ·
hertzsprung ·
russell ·
diagram ·
naap ·
although ·
tells ·
about ·
there ·
early ·
identifying ·
skyserver ·
however ·
will ·
still ·
able ·
obafgkm ·
find ·
approximate ·
telescope ·
without ·
meaningless ·
define ·
category ·
classifying ·
according ·
features ·
shape ·
function ·
wavelength ·
worlds ·
david ·
darling ·
which ·
assigned ·
scheme ·
today ·
evolved ·
devised ·
cosmos ·
divided ·
harvard ·
these ·
university ·
manchester ·
blue ·
graph ·
clicking ·
button ·
right ·
text ·
select ·
sirius ·
exoplaneten ·
bright ·
white ·
high ·
mass ·
they ·
energetic ·
several ·
times ·
brighter ·
than ·
reserves ·
hydrogen ·
fuel ·
simbad ·
coding ·
chapter ·
consists ·
parts ·
following ·
10 LIBRI IN INGLESE ASSOCIATI CON «SPECTRAL TYPE»
Scopri l'uso di
spectral type nella seguente selezione bibliografica. Libri associati con
spectral type e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Spectral Theory of Dynamical Systems
A finite or a cr-finite measure n, or the measure class of such a measure is called
the spectral type of E if there exists an x £ H such that nx : nx(B) = (E(B)x, x), B £ B
has the same null sets as n. A finite or a cr-finite measure /z, or the measure ...
Mahendra Ganpatrao Nadkarni,
1998
2
Stellar
Spectral Classification
This is done partly so that the change in the shape and slope of the continuum
can be seen as a function of spectral type and partly because consistency in
delineating the continuum, and so producing the rectification, is hard to achieve
for ...
Richard O. Gray, Christopher J. Corbally,
2009
3
Sky Catalogue 2000.0: Stars to magnitude 8.0
Each spectral type is divided into 10 subtypes, indicated by an appended number
from 0 to 9 (for example, AS). Occasionally, the subtypes have decimal
extensions, such as 60.5. The change in surface temperature corresponding to
adjacent ...
Alan Hirshfeld, Roger W. Sinnott, F. Ochsenbein,
1991
4
Spectral Classification and Multicolour Photometry
The observing list includes the several brightest single stars of each spectral type
, with emphasis on the latest types. The 8-color photometry will provide color
temperatures and 7(104) magnitudes in the infrared continuum, as well as
spectral ...
Ch. Fehrenbach, B.E. Westerlund,
1973
5
Handbook of Dynamical Systems: Volume 1B
The maximal spectral type of the restriction of a representation to any closed
invariant subspace is absolutely continuous with respect to the maximal spectral
type of the representation. 1.4.2. Correlation coefi'icients. Similarly to the case of
a ...
A. Katok, B. Hasselblatt,
2005
6
Introduction to Astronomical Photometry
54 g-v, 62 U-BvsB-y,71 B- V vs MK spectral type, 78 U-Bvs MK spectral type, 78 U
- B vs B- V interstellar law PER and CYG, 82 U— B vs B- V black-body positions,
86 U—BvsB—V synchrotron radiation, 90 Mc vs B2 - YI position of binaries, ...
7
Spectroscopic Astrophysics: An Assessment of the ...
tracks of stars are displayed, it is necessary to have single- valued relations
between spectral type and Te on the one hand and between Mv and iliboi or
radius on the other hand. It has been possible to show that the dominant factor
which ...
8
Astronomy: A Physical Perspective
not the absolute magnitudes. If we know the absolute magnitude for one spectral
type, then we can find the distance modulus for stars of that spectral type in the
cluster. The distance modulus is the same for all the stars in the cluster, so we
can ...
9
Horizons: Exploring the Universe
If a main-sequence star has a luminosity of 400 L}, what is its spectral type? (Hint:
See Figure 8-10 or 8-11.) 7. If a star has an apparent magnitude equal to its
absolute magnitude, how far away is it in parsecs? In light-years? 8. An O8 V star
...
Michael Seeds, Dana Backman,
2011
10
Asymptotic Giant Branch Stars
A practical definition of a PAGB star using the central star properties is by means
of spectral type and luminosity class, see, e.g., [125]. The location of PAGBs in
the HR diagram as derived from evolutionary calculations suggests spectral
types ...
Harm J. Habing, Hans Olofsson,
2004
10 NOTIZIE DOVE SI INCLUDE IL TERMINE «SPECTRAL TYPE»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
spectral type nel contesto delle seguenti notizie.
Magnetospherically driven optical and radio aurorae at the end of …
LSR J1835 + 3259 is a dwarf star of spectral type M8.5 with a bolometric luminosity 10−3.4 times that of the Sun, located at a distance of 5.67 ± 0.02 pc (ref. 4). «Nature.com, lug 15»
Subscribe to the newsletter
It can't tell much except the diameter of the planet and its orbital period, and spectral type of its parent star. Anything else such as its mass is informed guesswork ... «Science 2.0, lug 15»
Finding a star to call home
We live on a rocky little planet perfectly situated around a middle-aged G2 spectral type yellow star. In many ways, a very boring and ordinary star, but with an ... «The Conversation AU, feb 15»
New Kepler Discovery: Five Alien Planets in Ancient Star System …
KOI-3158 is a bright, high-proper motion, main-sequence star of spectral type K0. Its overabundance of alpha elements and peculiar kinematics make it a ... «The Daily Galaxy, gen 15»
The coolest stars
Since the temperature of a star can determine its visual color, this category scheme is known as spectral type. The main categories of spectral type are M, K, G, F, ... «Phys.Org, set 14»
Astronomers: Two Goldilocks Exoplanets in Gliese 581 System Just …
Gliese 581 is a main sequence red star with spectral type M3V located in the constellation Libra, about 20 light-years from Earth. Beginning in 2005 ... «Sci-News.com, lug 14»
Brown Dwarfs: Failed Stars Resembling Planets
Stars are classified by their spectral type, or the energy they radiate. Brown ... L dwarfs and T dwarfs are both identified by the elements seen in their spectrum. «Space.com, dic 13»
Data Mining For Red Dwarfs
Yet we actually live in a “sea of red dwarfs” — faint “dwarfs” of the M stellar spectral type that have masses typically less than half that of our own sun. «Forbes, lug 13»
Black Hole Secrets: Revealing The S-Star
These stars are color-coded to represent their spectral type: Early-type (young) ... shown in orange, and those with unknown spectral type are shown in magenta. «Universe Today, mag 13»
The Nearest Stars to Earth (Infographic)
Of all the stars closer than 15 light-years, only two are spectral type G, similar to our sun: Alpha Centauri A and Tau Ceti. The majority are M-type red dwarf stars. «Space.com, dic 12»