Nuclear Interactions in Supernovae .
... • The hydrogen is burned in a runaway reaction, and an enormous amount of energy is released from all the hydrogen being fused in a short amount of time. • This causes an explosion on the surface of the dwarf, which doesn’t affect the star, but increases its brightness by 50,000 to 100,000 times tha ...
... • The hydrogen is burned in a runaway reaction, and an enormous amount of energy is released from all the hydrogen being fused in a short amount of time. • This causes an explosion on the surface of the dwarf, which doesn’t affect the star, but increases its brightness by 50,000 to 100,000 times tha ...
Unit 60 to 79
... b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events will not leave any remnant? a. Type I supernova b. Type II supernova c. Nova 8) The Sun will likely never become a nova ...
... b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events will not leave any remnant? a. Type I supernova b. Type II supernova c. Nova 8) The Sun will likely never become a nova ...
Stellar mass Black Holes
... (receive photons) from inside this surface; they cannot escape. • Even if some unknown quantum mechanical effect were to prevent the central singularity, there is STILL an event horizon, and light and any material object cannot escape. • Any matter which enters the event horizon cannot escape; it is ...
... (receive photons) from inside this surface; they cannot escape. • Even if some unknown quantum mechanical effect were to prevent the central singularity, there is STILL an event horizon, and light and any material object cannot escape. • Any matter which enters the event horizon cannot escape; it is ...
Here
... • Using a good high resolution spectrum, you can get a much better measurement of the spectral energy distribution. • The disadvantage is that the efficiency is lower (more photons are lost in the complex optics). Also, it is difficult to measure more than one star at a time (in contrast to the dire ...
... • Using a good high resolution spectrum, you can get a much better measurement of the spectral energy distribution. • The disadvantage is that the efficiency is lower (more photons are lost in the complex optics). Also, it is difficult to measure more than one star at a time (in contrast to the dire ...
Emission and Absorption Spectra
... C. the peak of star A’s spectrum would be at a shorter wavelength than star B and it would be redder D. the peak of star A’s spectrum would be at a longer wavelength than star B and it would be bluer E. the peak of star A’s spectrum would be at a longer wavelength than star B, but they would both ap ...
... C. the peak of star A’s spectrum would be at a shorter wavelength than star B and it would be redder D. the peak of star A’s spectrum would be at a longer wavelength than star B and it would be bluer E. the peak of star A’s spectrum would be at a longer wavelength than star B, but they would both ap ...
Formation of Stars
... molecular clouds. Within these molecular clouds, gas and dust is able to cool, slowly converting their energy-of-motion into infrared radiation, which then escapes into interstellar space. These contracting clumps are termed protostars. ...
... molecular clouds. Within these molecular clouds, gas and dust is able to cool, slowly converting their energy-of-motion into infrared radiation, which then escapes into interstellar space. These contracting clumps are termed protostars. ...
The Celestial E-Sphere
... for copies. In all cases where there has been feedback it has been very positive. Some of the lecturers and tutors at the OU expressed interest in using it for teaching on some of the Astronomy courses including S282. This further influenced the features that have been included. In particular, after ...
... for copies. In all cases where there has been feedback it has been very positive. Some of the lecturers and tutors at the OU expressed interest in using it for teaching on some of the Astronomy courses including S282. This further influenced the features that have been included. In particular, after ...
stars - allenscience
... These celestial objects are extremely dense (a lot of matter in a very small volume). ...
... These celestial objects are extremely dense (a lot of matter in a very small volume). ...
Integrative Studies 410 Our Place in the Universe
... • We study the subjects of our research for a tiny fraction of its lifetime • Sun’s life expectancy ~ 10 billion (1010) years • Careful study of the Sun ~ 370 years • We have studied the Sun for only 1/27 millionth of its lifetime! ...
... • We study the subjects of our research for a tiny fraction of its lifetime • Sun’s life expectancy ~ 10 billion (1010) years • Careful study of the Sun ~ 370 years • We have studied the Sun for only 1/27 millionth of its lifetime! ...
Stars and Galaxies
... The mass of a tremendously big supernova core can collapse to a point, forming a black hole Gravity is so strong not even light can escape Beyond a black hole’s event horizon gravity operates as it would before the mass collapsed Matter emitted by a star over its life time is recycled and can ...
... The mass of a tremendously big supernova core can collapse to a point, forming a black hole Gravity is so strong not even light can escape Beyond a black hole’s event horizon gravity operates as it would before the mass collapsed Matter emitted by a star over its life time is recycled and can ...
Ch.4 HW
... 2. What is the wavelength range for Radio? 3. Which has a higher velocity – visible light or X-rays? 4. Which kinds of electromagnetic radiation have more energy? 5. Star A is blue, Star B is yellow, and Star C is red. Which one of these is the hottest star? 6. Hill's toy gun emits blue light, Johns ...
... 2. What is the wavelength range for Radio? 3. Which has a higher velocity – visible light or X-rays? 4. Which kinds of electromagnetic radiation have more energy? 5. Star A is blue, Star B is yellow, and Star C is red. Which one of these is the hottest star? 6. Hill's toy gun emits blue light, Johns ...
Estimate the Kelvin-Helmholtz timescale for a 5 solar mass star on
... [A discussion along the following lines earns a few bonus marks: The collapse that occurs is not of the entire star, but only of the helium core. A fair estimate of the mass of this core is about 0.3 x the stellar mass (the Schoenberg-Chandrasekhar limit), and a fair estimate of the size of the core ...
... [A discussion along the following lines earns a few bonus marks: The collapse that occurs is not of the entire star, but only of the helium core. A fair estimate of the mass of this core is about 0.3 x the stellar mass (the Schoenberg-Chandrasekhar limit), and a fair estimate of the size of the core ...
Lecture 4 January 31 - Center for Astrophysics and Space
... Sun shrank steadily, with T rising until, about 10 million years after it started to form, it reached its current size There is a VERY fast increase in nuclear energy production above 1,000,000K. At 15,000,000K in the core nuclear power generated finally balanced the luminosity from the surface. Tha ...
... Sun shrank steadily, with T rising until, about 10 million years after it started to form, it reached its current size There is a VERY fast increase in nuclear energy production above 1,000,000K. At 15,000,000K in the core nuclear power generated finally balanced the luminosity from the surface. Tha ...