Stars - RSM Home
... diagram where most stars lie, is called the main sequence. • Where is our sun? The main sequence is the location on the diagram where most stars lie ...
... diagram where most stars lie, is called the main sequence. • Where is our sun? The main sequence is the location on the diagram where most stars lie ...
- hoganshomepage
... Spectroscope: Used to measure the chemical composition of the stars. (also temperature and direction the star is moving in relation to the Earth.) How? Set up a spectroscope with different tubes; each gas has different spectras – light patterns. ...
... Spectroscope: Used to measure the chemical composition of the stars. (also temperature and direction the star is moving in relation to the Earth.) How? Set up a spectroscope with different tubes; each gas has different spectras – light patterns. ...
stars_2nd_edit
... Because of their small size these stars burn their fuel very slowly, which allows them to live a very long time. Some red dwarf stars will live trillions of years before they run out of fuel. ...
... Because of their small size these stars burn their fuel very slowly, which allows them to live a very long time. Some red dwarf stars will live trillions of years before they run out of fuel. ...
The Hertzsprung – Russell Diagram Star Data Table
... Danish astronomer Ejnar Hertzsprung and American astronomer Henry Russell discovered a relationship between the brightness of a star and the surface temperature of a star. The graph of a star’s absolute magnitude versus its temperature is called an ...
... Danish astronomer Ejnar Hertzsprung and American astronomer Henry Russell discovered a relationship between the brightness of a star and the surface temperature of a star. The graph of a star’s absolute magnitude versus its temperature is called an ...
Study Guide - Universe Exam key 2014-15 v2
... High mass stars :Nebula to protostar to main sequence to Super red giants then Supernova then Neutron star If it is an extremely high mass star it will end as a black hole. Low Mass Stars: Nebula to protostar to main sequence to red giant to white dwarf to black dwarf. ...
... High mass stars :Nebula to protostar to main sequence to Super red giants then Supernova then Neutron star If it is an extremely high mass star it will end as a black hole. Low Mass Stars: Nebula to protostar to main sequence to red giant to white dwarf to black dwarf. ...
Spectroscopic Investigation of Companion Stars in Herbig
... Herbig AeBe (HAEBE) binary systems are good environments for the study of pre-main sequence stellar evolution in companion stars whose mass may be significantly lower than that of the primary star. Measurements of the spectral type and surface gravity of the companion star in the system allow it to ...
... Herbig AeBe (HAEBE) binary systems are good environments for the study of pre-main sequence stellar evolution in companion stars whose mass may be significantly lower than that of the primary star. Measurements of the spectral type and surface gravity of the companion star in the system allow it to ...
Introduction to the HR Diagram
... of ~80 - 1000 days. Stars that have evolved to the giant branch are commonly referred to as red giants. Eventually these red giants will shrug off a planetary nebula and leave a white dwarf core remnant. There is no relationship among mass and luminosity on the giant branch. The Supergiant Branch: S ...
... of ~80 - 1000 days. Stars that have evolved to the giant branch are commonly referred to as red giants. Eventually these red giants will shrug off a planetary nebula and leave a white dwarf core remnant. There is no relationship among mass and luminosity on the giant branch. The Supergiant Branch: S ...
Stars: the Hertzsprung
... line from the upper left to the lower right. – Hotter is brighter – Cooler is dimmer • Red giant stars – Upper right hand corner (big, bright, and cool) • White dwarf stars – Lower left hand corner (small, dim, and hot) ...
... line from the upper left to the lower right. – Hotter is brighter – Cooler is dimmer • Red giant stars – Upper right hand corner (big, bright, and cool) • White dwarf stars – Lower left hand corner (small, dim, and hot) ...
PH507 - University of Kent
... 3. Taking Deneb to have a surface temperature of 8,500K and a radius of 200 solar radii, determine the present spectral class and luminosity class of Deneb. Investigate and state the stages through which Deneb is expected to progress. State the name of the pre-main-sequence track that Deneb would ha ...
... 3. Taking Deneb to have a surface temperature of 8,500K and a radius of 200 solar radii, determine the present spectral class and luminosity class of Deneb. Investigate and state the stages through which Deneb is expected to progress. State the name of the pre-main-sequence track that Deneb would ha ...
PH109 Exploring the Universe, Test 3, Fall 2001 Please indicate the
... c) it reappears later as neutrinos, d) it is resupplied to the Sun by meteoroid impacts 36. What do all main sequence stars have in common? a) they are all yellow, b) they are all consuming hydrogen in their cores c) they are located near the Sun in space, d) they are all among the most luminous sta ...
... c) it reappears later as neutrinos, d) it is resupplied to the Sun by meteoroid impacts 36. What do all main sequence stars have in common? a) they are all yellow, b) they are all consuming hydrogen in their cores c) they are located near the Sun in space, d) they are all among the most luminous sta ...
Properties of Stars and H
... What does apparent and actual magnitude measure? Luminosity or how bright the star is How can you tell temperature by color? From cold to hot: Red Yellow White Blue On the HR diagram, what stage are most stars in? Main Sequence ...
... What does apparent and actual magnitude measure? Luminosity or how bright the star is How can you tell temperature by color? From cold to hot: Red Yellow White Blue On the HR diagram, what stage are most stars in? Main Sequence ...
Variable Stars: Pulsation, Evolution and applications to Cosmology
... Luminsoity Class I: Supergiants, II: Bright giants, III: Giants, IV: Subgiants, V: Main Sequence Spectral Type: classifcation of stellar spectra, essentially a temperature sequence, OBAFGKM Sun is a G2V, Betelgeuse is a M5V Exercise ...
... Luminsoity Class I: Supergiants, II: Bright giants, III: Giants, IV: Subgiants, V: Main Sequence Spectral Type: classifcation of stellar spectra, essentially a temperature sequence, OBAFGKM Sun is a G2V, Betelgeuse is a M5V Exercise ...
What is the net result of the proton-proton chain? a. 2 protons make
... Evidence for stellar evolution comes from: a. Studies of molecules at close to absolute zero b. Tracking one star through time c. Plotting stars as they move about on the Hertzsprung-Russell diagram d. Studying different objects at different stages and piecing together an evolutionary picture e. Obs ...
... Evidence for stellar evolution comes from: a. Studies of molecules at close to absolute zero b. Tracking one star through time c. Plotting stars as they move about on the Hertzsprung-Russell diagram d. Studying different objects at different stages and piecing together an evolutionary picture e. Obs ...
Supernova
... – Short time period (few days) • These explosions used to be classified as novas or supernovas. – Based on absolute magnitude • They are now all called supernovas. ...
... – Short time period (few days) • These explosions used to be classified as novas or supernovas. – Based on absolute magnitude • They are now all called supernovas. ...
IB_Op_F_04 - Effectsmeister
... sequence stars . Does our Sun fit into this category? White dwarfs are hot dim stars while red giants are bright cool stars. Where (i.e. in which regions) should these two types of stars be in the diagram? Identify at least one red giant and one white dwarf.have low surface temperature and large neg ...
... sequence stars . Does our Sun fit into this category? White dwarfs are hot dim stars while red giants are bright cool stars. Where (i.e. in which regions) should these two types of stars be in the diagram? Identify at least one red giant and one white dwarf.have low surface temperature and large neg ...
The Future Sun
... stars than Pleiades. b. Most stars are one the main sequence. c. Perseus has small range of luminosity d. Some clusters have giants. ...
... stars than Pleiades. b. Most stars are one the main sequence. c. Perseus has small range of luminosity d. Some clusters have giants. ...
Chapter 28 – Stars and Galaxies
... 2. Stellar mass is expressed as multiples of the sun’s mass Betelgeuse’s mass – 20 solar masses F. Temperature and Color 1. Blue stars are hot 2. Red stars are cool G. Luminosity 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star w ...
... 2. Stellar mass is expressed as multiples of the sun’s mass Betelgeuse’s mass – 20 solar masses F. Temperature and Color 1. Blue stars are hot 2. Red stars are cool G. Luminosity 1. The actual brightness of the star is luminosity 2. If two stars have the same surface temperature, the larger star w ...
Star Classification
... Why are the stars in Orion’s Belt different colors? The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The ...
... Why are the stars in Orion’s Belt different colors? The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The ...
Expansion of the Universe
... The overall lifespan of a star is determined by its mass Stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence Massive stars need higher central temperatures and pressures to support themselves against gravitational collapse, and for this reason, fusion reaction ...
... The overall lifespan of a star is determined by its mass Stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence Massive stars need higher central temperatures and pressures to support themselves against gravitational collapse, and for this reason, fusion reaction ...
Characteristics of Stars
... appears to move because your eyes are not at exactly the same place, so each eye views the thumb from a different angle. Now hold your thumb at arm's length and repeat the experiment. Your thumb will still appear to shift, but will not appear to move as much as it did when it was closer. The same th ...
... appears to move because your eyes are not at exactly the same place, so each eye views the thumb from a different angle. Now hold your thumb at arm's length and repeat the experiment. Your thumb will still appear to shift, but will not appear to move as much as it did when it was closer. The same th ...
A Star is
... • The dark lines in the spectrum reveal the star’s composition and temperature. • Every element has a different spectra • Here are the spectra for some common elements: ...
... • The dark lines in the spectrum reveal the star’s composition and temperature. • Every element has a different spectra • Here are the spectra for some common elements: ...
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type). Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler). The sequence has been expanded with classes for other stars and star-like objects that do not fit in the classical system, such class D for white dwarfs and class C for carbon stars.In the MK system a luminosity class is added to the spectral class using Roman numerals. This is based on the width of certain absorption lines in the star's spectrum which vary with the density of the atmosphere and so distinguish giant stars from dwarfs. Luminosity class 0 or Ia+ stars for hypergiants, class I stars for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main-sequence stars, class sd for sub-dwarfs, and class D for white dwarfs. The full spectral class for the Sun is then G2V, indicating a main-sequence star with a temperature around 5,800K.