Part 1
... 11. At the center of the Sun, fusion converts hydrogen into (A) water and carbon dioxide. (B) plasma and smoke. (C) radiation and elements like carbon and nitrogen. (D) radioactive elements like uranium and plutonium. (E) helium, energy, and neutrinos. 12. In order to start nuclear fusion, a high t ...
... 11. At the center of the Sun, fusion converts hydrogen into (A) water and carbon dioxide. (B) plasma and smoke. (C) radiation and elements like carbon and nitrogen. (D) radioactive elements like uranium and plutonium. (E) helium, energy, and neutrinos. 12. In order to start nuclear fusion, a high t ...
Astronomy 100 Tuesday, Thursday 2:30
... Black Hole Sizes • A Black Hole with the mass of the Earth would have a radius of 0.009 meters • A Black Hole with the mass of the Sun would have a radius of 3 kilometers ...
... Black Hole Sizes • A Black Hole with the mass of the Earth would have a radius of 0.009 meters • A Black Hole with the mass of the Sun would have a radius of 3 kilometers ...
Milky Way Galaxy
... pull the remaining material closer together. The star will shrink. In fact, it may get to be only a few hundred kilometers wide! The star is then called a "white dwarf". It can stay like this for a long time. Eventually, it will stop producing any light at all. It is then called a "black dwarf" and ...
... pull the remaining material closer together. The star will shrink. In fact, it may get to be only a few hundred kilometers wide! The star is then called a "white dwarf". It can stay like this for a long time. Eventually, it will stop producing any light at all. It is then called a "black dwarf" and ...
Neutron Stars and Black Holes
... Waves have not yet been observed directly However, a neutron-star binary system has been observed Orbits are slowing at the rate predicted if gravity waves are carrying off the lost ...
... Waves have not yet been observed directly However, a neutron-star binary system has been observed Orbits are slowing at the rate predicted if gravity waves are carrying off the lost ...
Death of massive stars
... A black hole is just a dead star with a massive gravitational field. At a reasonably large distance, its gravity is no greater than that of a normal object of similar mass. If the Sun became a black hole, the planets’ orbits would not change at all. ...
... A black hole is just a dead star with a massive gravitational field. At a reasonably large distance, its gravity is no greater than that of a normal object of similar mass. If the Sun became a black hole, the planets’ orbits would not change at all. ...
White Dwarfs and Neutron Stars
... • What is the maximum mass of a white dwarf? • What are some of the properties of neutron stars? • Why do many neutron stars spin rapidly? • In what different forms does one find neutron stars? ...
... • What is the maximum mass of a white dwarf? • What are some of the properties of neutron stars? • Why do many neutron stars spin rapidly? • In what different forms does one find neutron stars? ...
White Dwarfs and Neutron Stars
... • What is the maximum mass of a white dwarf? • What are some of the properties of neutron stars? • Why do many neutron stars spin rapidly? • In what different forms does one find neutron stars? ...
... • What is the maximum mass of a white dwarf? • What are some of the properties of neutron stars? • Why do many neutron stars spin rapidly? • In what different forms does one find neutron stars? ...
14-1 Reading Questions: Neutron Stars
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
ASTRONOMY 157 – Stars and Galaxies - Syllabus
... Core collapse, H shell burning, expansion to red giant, helium flash, heavy element production ...
... Core collapse, H shell burning, expansion to red giant, helium flash, heavy element production ...
aas_gdemessieres - Astronomy at Swarthmore College
... about 2-3 radii. The Si XIII data suggest that the hottest material is nearest the star, but there are uncertainties in the photospheric EUV flux that may affect this result. ...
... about 2-3 radii. The Si XIII data suggest that the hottest material is nearest the star, but there are uncertainties in the photospheric EUV flux that may affect this result. ...
Name - MIT
... E) F type 37) For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequenc ...
... E) F type 37) For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequenc ...
Black Hole phenomena
... The Sun will not turn into a black hole. • It’s not massive enough for its force of gravity to overcome the natural pushback of atomic structure. • But if it did, its event horizon would have a radius of 3 km (compared to the 700000 km it is now) • The EH of the Earth as a BH would have a 9mm radi ...
... The Sun will not turn into a black hole. • It’s not massive enough for its force of gravity to overcome the natural pushback of atomic structure. • But if it did, its event horizon would have a radius of 3 km (compared to the 700000 km it is now) • The EH of the Earth as a BH would have a 9mm radi ...
Name
... For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequence 40) What is ...
... For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequence 40) What is ...
Name - MIT
... For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequence 40) What is ...
... For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequence 40) What is ...
April 15th
... • Type Ia supernovas make excellent standard candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
... • Type Ia supernovas make excellent standard candles because they have identical maximum luminosities • Their collapse and explosion occur the same way each time ...
Name
... A) The rate that visible light from the Sun is being absorbed by the Earth’s atmosphere B) The rate that gamma rays are hitting the Earth’s atmosphere C) The rate that hydrogen is being fused into helium in the Sun D) The rate that white dwarfs are being formed in the galaxy E) The rate that stars f ...
... A) The rate that visible light from the Sun is being absorbed by the Earth’s atmosphere B) The rate that gamma rays are hitting the Earth’s atmosphere C) The rate that hydrogen is being fused into helium in the Sun D) The rate that white dwarfs are being formed in the galaxy E) The rate that stars f ...
ppt
... M83 is a barred spiral galaxy with a starburst nucleus, located in the Centaurus A group, at a distance of 3.7 Mpc. It was observed by Chandra in 2000 April. About 55% of the total emission in the nuclear region is unresolved. About 80% of the unresolved nuclear emission can be attributed to hot the ...
... M83 is a barred spiral galaxy with a starburst nucleus, located in the Centaurus A group, at a distance of 3.7 Mpc. It was observed by Chandra in 2000 April. About 55% of the total emission in the nuclear region is unresolved. About 80% of the unresolved nuclear emission can be attributed to hot the ...
Lecture 16, AGN Evolution
... existence of energetic phenomena in the nuclei of galaxies that cannot be attributed directly to stars • AGN are classified based (in large part) on their luminosity in different wavebands (especially the optical and radio) ...
... existence of energetic phenomena in the nuclei of galaxies that cannot be attributed directly to stars • AGN are classified based (in large part) on their luminosity in different wavebands (especially the optical and radio) ...
X-ray emission and the incidence of magnetic fields in the massive
... field strength in a detection case, and provide upper limits for a nondetection. We sampled the 4-dimensional parameter space (i, β, φ, B) which describes a centered dipolar magnetic configuration. i is the projected angle of the rotation axis, β is the angle between the magnetic axis and the rotati ...
... field strength in a detection case, and provide upper limits for a nondetection. We sampled the 4-dimensional parameter space (i, β, φ, B) which describes a centered dipolar magnetic configuration. i is the projected angle of the rotation axis, β is the angle between the magnetic axis and the rotati ...
Stars - Red, Blue, Old, New pt.4
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
Astrophysical X-ray source
Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.There are a number of types of astrophysical objects which emit X-rays, from galaxy clusters, through black holes in active galactic nuclei (AGN) to galactic objects such as supernova remnants, stars, and binary stars containing a white dwarf (cataclysmic variable stars and super soft X-ray sources), neutron star or black hole (X-ray binaries). Some solar system bodies emit X-rays, the most notable being the Moon, although most of the X-ray brightness of the Moon arises from reflected solar X-rays. A combination of many unresolved X-ray sources is thought to produce the observed X-ray background. The X-ray continuum can arise from bremsstrahlung, either magnetic or ordinary Coulomb, black-body radiation, synchrotron radiation, inverse Compton scattering of lower-energy photons be relativistic electrons, knock-on collisions of fast protons with atomic electrons, and atomic recombination, with or without additional electron transitions.Furthermore, celestial entities in space are discussed as celestial X-ray sources. The origin of all observed astronomical X-ray sources is in, near to, or associated with a coronal cloud or gas at coronal cloud temperatures for however long or brief a period.