Red Giants - Uplift North Hills Prep
... • Mass - hard to figure out, but there are binary stars • Age - exact age is hard, but can estimate ...
... • Mass - hard to figure out, but there are binary stars • Age - exact age is hard, but can estimate ...
Slide 1
... • Mass - hard to figure out, but there are binary stars • Age - exact age is hard, but can estimate ...
... • Mass - hard to figure out, but there are binary stars • Age - exact age is hard, but can estimate ...
15-3
... A star is born Stars are born in nebula (a vast cloud of gas and dust) 2. Gravity pulls gas together 3. When nuclear fusion takes place a star is born 4. The youngest stars are called protostars ...
... A star is born Stars are born in nebula (a vast cloud of gas and dust) 2. Gravity pulls gas together 3. When nuclear fusion takes place a star is born 4. The youngest stars are called protostars ...
Astroparticle physics 1. stellar astrophysics and solar neutrinos
... • Spectral line strengths following Saha law. ...
... • Spectral line strengths following Saha law. ...
Lecture 26 - Empyrean Quest Publishers
... A. reddening--preferential scattering-blue light (why sky is blue). B. absorption--this affects flux and measured distance. 2. Molecular Clouds--H2 molecules--dense MC are star formation regions (stellar nurseries like Orion Nebula). ...
... A. reddening--preferential scattering-blue light (why sky is blue). B. absorption--this affects flux and measured distance. 2. Molecular Clouds--H2 molecules--dense MC are star formation regions (stellar nurseries like Orion Nebula). ...
Stars II. Stellar Physics
... The solar convection is visible on the surface as the granulation. At the bright (high-T) center of each granule, gas is rising upward, and at the darker (lowerT) granule boundaries, it is sinking down again. The size of a granule seen from the Earth is typically 1”, corresponding to about 1000 km o ...
... The solar convection is visible on the surface as the granulation. At the bright (high-T) center of each granule, gas is rising upward, and at the darker (lowerT) granule boundaries, it is sinking down again. The size of a granule seen from the Earth is typically 1”, corresponding to about 1000 km o ...
Calculating_Main_Sequence_Lifetimes_StudentGuide
... stars having larger magnitudes. Don’t confuse the relative magnitude with absolute magnitude. The relative magnitude measures the brightness of a star as it appears in the sky and it depends on the brightness and on the distance; if we put a star at the distance of 10 Parsec (33 year light), its mag ...
... stars having larger magnitudes. Don’t confuse the relative magnitude with absolute magnitude. The relative magnitude measures the brightness of a star as it appears in the sky and it depends on the brightness and on the distance; if we put a star at the distance of 10 Parsec (33 year light), its mag ...
How Is a Star`s Color Related to Its Temperature?
... Rigel is blue, and Betelgeuse is red. Capella and our sun are yellow. In this activity you will make your own HertzsprungRussell diagram. You will see how star brightness, color, temperature, and class are related. Materials: Colored pencils (red, orange, yellow, blue) Procedure: 1. Study the star d ...
... Rigel is blue, and Betelgeuse is red. Capella and our sun are yellow. In this activity you will make your own HertzsprungRussell diagram. You will see how star brightness, color, temperature, and class are related. Materials: Colored pencils (red, orange, yellow, blue) Procedure: 1. Study the star d ...
29.3 – Stellar Evolution
... gases = planetary nebula •Gravity causes star to collapse inward •Hot, dense core of matter = white dwarf ...
... gases = planetary nebula •Gravity causes star to collapse inward •Hot, dense core of matter = white dwarf ...
Variable Stars: Pulsation, Evolution and applications to Cosmology
... At each t, star has a certain surface temperature and luminosity. Plot of (T,L) or ((B-V),V) as a function of time is a stellar evolutionary track on a HR diagram. HR diagram is the most important diagram in Astronomy. ...
... At each t, star has a certain surface temperature and luminosity. Plot of (T,L) or ((B-V),V) as a function of time is a stellar evolutionary track on a HR diagram. HR diagram is the most important diagram in Astronomy. ...
Final Review Questions. 1. Compare the atmospheric scale height of
... 18. Why is it that at T ∼ 107 K, the proton-proton chain and the CNO cycle produce roughly the same amount of energy, even though the CNO cycle requires much higher Gamov energies (and thus has much lower quantum tunneling probabilities)? 19. Why does the central temperature of the Sun increase slig ...
... 18. Why is it that at T ∼ 107 K, the proton-proton chain and the CNO cycle produce roughly the same amount of energy, even though the CNO cycle requires much higher Gamov energies (and thus has much lower quantum tunneling probabilities)? 19. Why does the central temperature of the Sun increase slig ...
Astronomy Test Review
... seen from Earth where as absolute magnitude is the brightness of a star from a standard distance. (10 parsecs) ...
... seen from Earth where as absolute magnitude is the brightness of a star from a standard distance. (10 parsecs) ...
Stellar Evolution
... time it loses some gases in the outer shell and gets smaller in mass. Eventually the star becomes a white dwarf. Instead of being made of only carbon it can be made of many different elements. ...
... time it loses some gases in the outer shell and gets smaller in mass. Eventually the star becomes a white dwarf. Instead of being made of only carbon it can be made of many different elements. ...
Review Quiz No. 17
... The radius in the interior of a star where fusion processes can no longer take place. The point in time of a star’s life when nuclear fusion of hydrogen into helium ceases. The point in time of a star’s life when nuclear fusion processes cease alltogether. The point in a rotating star cluster beyond ...
... The radius in the interior of a star where fusion processes can no longer take place. The point in time of a star’s life when nuclear fusion of hydrogen into helium ceases. The point in time of a star’s life when nuclear fusion processes cease alltogether. The point in a rotating star cluster beyond ...
MULTIPLE CHOICE. Choose the one alternative that best
... has a hotter surface temperature? Explain your answers. ...
... has a hotter surface temperature? Explain your answers. ...
2009 Assessment Schedule (90764)
... A small hot object has same luminosity with smaller surface area, so higher surface temperature – gives idea of smaller surface area (or size) therefore higher temperature. ...
... A small hot object has same luminosity with smaller surface area, so higher surface temperature – gives idea of smaller surface area (or size) therefore higher temperature. ...
Parallax
... layers to expand and cool Star becomes a giant Helium nuclei fuse to form a core of Carbon ...
... layers to expand and cool Star becomes a giant Helium nuclei fuse to form a core of Carbon ...
Module 3: Exploring Other Stars Assignment 5: Estimating
... age, astronomers have found it’s much more accurate to represent the spectrum as a plot of intensity versus wavelength. This is what the applet in the last module was doing for a theoretical blackbody. In the document Module3_spectra.pdf you see the digital spectra of six real stars. The actual spec ...
... age, astronomers have found it’s much more accurate to represent the spectrum as a plot of intensity versus wavelength. This is what the applet in the last module was doing for a theoretical blackbody. In the document Module3_spectra.pdf you see the digital spectra of six real stars. The actual spec ...
Stars Notes - Yonkers Public Schools
... size of Earth) • Hot • Low in luminosity (due to their small size) • Planetary nebula: The resulting glowing halo of gases that forms when a white dwarf’s layers give off visible light • Black dwarfs – dead stars ...
... size of Earth) • Hot • Low in luminosity (due to their small size) • Planetary nebula: The resulting glowing halo of gases that forms when a white dwarf’s layers give off visible light • Black dwarfs – dead stars ...
Second
... • Determine the variables that define a star, e.g., L, P(r), r(r). • Using physics, establish an equal number of equations that relate the variables. Using boundary conditions, these equations can be solved exactly and uniquely. • Observe some of the boundary conditions, e.g. L, R…. and use the eqns ...
... • Determine the variables that define a star, e.g., L, P(r), r(r). • Using physics, establish an equal number of equations that relate the variables. Using boundary conditions, these equations can be solved exactly and uniquely. • Observe some of the boundary conditions, e.g. L, R…. and use the eqns ...
Morning Announcements
... The reason is that there is a connection between temperature and total energy output, which is described by the Stefan-Boltzmann law. There are two important aspects to remember: • The total amount of light energy that a star emits — called the luminosity (L), and measured by the absolute magnitude ...
... The reason is that there is a connection between temperature and total energy output, which is described by the Stefan-Boltzmann law. There are two important aspects to remember: • The total amount of light energy that a star emits — called the luminosity (L), and measured by the absolute magnitude ...
Physics@Brock - Brock University
... Big Bang created hydrogen and some helium, along with a slew of other subatomic particles and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions ( ...
... Big Bang created hydrogen and some helium, along with a slew of other subatomic particles and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions ( ...
Lec7_2D
... blackbody law, hot things emit more light. But a star’s brightness also depends on its size – the larger the area, the more light that is emitted. The relationship between luminosity, radius, and temperature is ...
... blackbody law, hot things emit more light. But a star’s brightness also depends on its size – the larger the area, the more light that is emitted. The relationship between luminosity, radius, and temperature is ...
Lecture 24: High Mass Star Formation Astro 6890/8980 Prof. Tom
... with a disk. Must overcome magnetic pressure, resulting in magnetospheric accretion for low mass stars. Must overcome photon pressure for high mass stars. ...
... with a disk. Must overcome magnetic pressure, resulting in magnetospheric accretion for low mass stars. Must overcome photon pressure for high mass stars. ...