与 «SPECTRAL CLASS»相关的英语书籍
在以下的参考文献中发现
spectral class的用法。与
spectral class相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
Within each spectral class there are a further 10 subdivisions (types) labelled A0,
A1... A9, with temperature decreasing from A0 to A9. Table 5.3 shows the spectral
classes for some common stars. Table 5. 3 Important characteristics of spectral ...
2
Measuring the Universe: The Cosmological Distance Ladder
Kohlschiitter and Adams showed conclusively that, although stars in the same
spectral class have the same spectral lines, the width of the spectral lines
depends upon their luminosity. The spectral lines of a small star are broader and
fuzzier ...
Spectral class At first, astronomers didn't have a clue about what spectral types
meant, so they just grouped stars together (under the headings of Type A, Type B
, and so on) based on similarities in their spectra. Later, some astronomers ...
4
Horizons: Exploring the Universe
To do so you must know their spectral class, their luminosity class, and their
distance. Your census of the family of stars produces some surprising
demographic results. Your survey faces two problems. 1. The most luminous
stars are so rare ...
Michael Seeds, Dana Backman,
2011
5
Stellar Interiors: Physical Principles, Structure, and Evolution
The sun is a G2 spectral class star. Our Figure 4.8 shows spectra for the normal
range of classes for main sequence stars (and see accompanying discussion).
Our §4.7 briefly discusses the new classes L and T for dwarfs (luminosity class V
...
Carl J. Hansen, Steven D Kawaler, Virginia Trimble,
2004
6
The Physical Universe: An Introduction to Astronomy
... characteristics of the prominent spectral lines used to type stellar spectra.
Notice that spectral types are independent of interstellar reddening, and that finer
subdivisions are introduced by appending the numbers 0 to 9 to each spectral
class.
7
Cascade Resource(s) Management Plan (RMP): Environmental ...
The delineated photos were taken into the field and each spectral class was
labeled and ground checked for: 1. Physiography 7. Species Composition % 2.
Elevation 8. Range Site 3. Slope Z 9. Range Condition 4. Parent Material 10.
Surface ...
8
Proposed Cascade resource management plan and final ...
The delineated photos were taken into the field and each spectral class was
labeled and ground checked for: 1. Physiography 7. Species Composition % 2.
Elevation 8. Range Site 3. Slope % 9. Range Condition 4. Parent Material 10.
Surface ...
United States. Bureau of Land Management. Boise District Office,
1987
9
Draft Cascade Resource management plan and draft ...
The delineated photos were taken into the field and each spectral class was
labeled and ground checked for: 1. Physiography 7. Species Composition % 2.
Elevation 8. Range Site 3. Slope % 9. Range Condition 4. Parent Material 10.
Surface ...
United States. Bureau of Land Management, United States. Bureau of Land Management. Boise District Office,
1986
10
The Evolving Universe and the Origin of Life: The Search for ...
When the Balmer lines were hardly noticeable, the spectral class was registered
as M or evenO. It is easy to notice that stars are of different colors. Betelgeuse in
Orion is clearly red, while Sirius near to it in the sky shines blue. It was soon ...
Pekka Teerikorpi, Mauri Valtonen, K. Lehto,
2008
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Earth-like exoplanet discovered
Along with similarities in size and makeup, the star Kepler-452b orbits is very similar to the sun, with the same spectral class, which means it has the same mass, ... «UTA The Shorthorn, 七月 15»
Mizar — A Fresh Look at an Old Friend
The two components of Mizar A are both nearly identically-sized spectral class A stars. This image was made in the mid-1990s with an optical interferometer ... «Sky & Telescope, 三月 15»
Kepler-186f: How Astronomers Discovered an Earth-Sized Planet in …
Astronomers classify stars into the spectral classes: O, B, A, F, G, K, and M. The M spectral class stars in the main part of their life are the coolest, least luminous, ... «Decoded Science, 四月 14»
Nearby Brown Dwarf Captured in a Direct Image
Brown dwarfs are classified as spectral classes M, L, T, and Y and are ... Eventually we want to directly image and acquire the spectrum of Earth-like planets. «Universe Today, 一月 14»
Canopus: Amazingly Bright Star
Because the star's spectral class is not well studied, it is difficult to establish how far away Canopus is. Parallax measurements with the Hipparcos satellite have ... «Space.com, 九月 13»
Different Supernovae; Different Neutron Stars
These objects are a pair of stars formed by a hot B spectral class stars with hydrogen emission in their spectrum in a binary orbit with a neutron star. The neutron ... «Universe Today, 十一月 11»
Star of the Week: Alpheratz, in Andromeda, part of Great Square
The spectral class of this star is B9p. The B9 represents a star that is much hotter ... It is peculiar in the sense that its spectrum reveals an unexpected amount of ... «EarthSky, 十二月 10»
Astronomy Without A Telescope – Brown Dwarfs Are Magnetic Too
An exoplanet could easily outshine its host star in the radio spectrum if its ... stars in the K and M spectral classes (remembering the spectral class mantra Old ... «Universe Today, 七月 10»
Enigmatic star could emerge from its gassy cocoon
Two sets of blended spectral lines in the spectrum of Eta Carinae, seen with the ... it was seen as a hot, blue star, now known to have been of spectral class O. «Nature.com, 六月 10»
Deneb: A distant and very luminous star
Considering its spectral classification (A2), Deneb must have a surface temperature ... on the amount of electromagnetic radiation it produces) of the A-type stars. «EarthSky, 三月 10»