A105 Stars and Galaxies
... The bright, point-like source at the center of the image was produced by a huge X-ray flare in the vicinity of the supermassive black hole. ...
... The bright, point-like source at the center of the image was produced by a huge X-ray flare in the vicinity of the supermassive black hole. ...
Astronomy
... Learning Target: Be able to explain what causes various types of stellar explosions Question of the day: Once you have your test back, use your book, notes and each other to correctly describe star formation, using terms such as nuclear fusion, protostar, Ttauri star, interstellar cloud, fragmenting ...
... Learning Target: Be able to explain what causes various types of stellar explosions Question of the day: Once you have your test back, use your book, notes and each other to correctly describe star formation, using terms such as nuclear fusion, protostar, Ttauri star, interstellar cloud, fragmenting ...
! • Supermassive Black Holes (SMBH) at Work: Effects of
... type galaxies – Detect onset of winds – decrease in SZ signal – Detect hot halos of spirals!! see Andersen+11;Bogdan+13a,13b ...
... type galaxies – Detect onset of winds – decrease in SZ signal – Detect hot halos of spirals!! see Andersen+11;Bogdan+13a,13b ...
Life Cycle of Stars Powerpoint
... Black Holes • The gravity becomes so strong that nothing can escape, not even light. This is a black hole. • No light, radio waves, or any form of radiation can get out of a black hole. Astronomers can not see black holes directly. • Astronomers can detect black holes indirectly – Gas pulled in rot ...
... Black Holes • The gravity becomes so strong that nothing can escape, not even light. This is a black hole. • No light, radio waves, or any form of radiation can get out of a black hole. Astronomers can not see black holes directly. • Astronomers can detect black holes indirectly – Gas pulled in rot ...
NASA`s Chandra Sees Brightest Supernova Ever
... about 4000 km s−1 indicated by the H line, and might provide a natural explanation for the long duration and rise time of the SN because of time needed for energy to diffuse out of the massive envelope. However, Instead of 70 d, the observed peak luminosity would seem to require an age of 200-380 ...
... about 4000 km s−1 indicated by the H line, and might provide a natural explanation for the long duration and rise time of the SN because of time needed for energy to diffuse out of the massive envelope. However, Instead of 70 d, the observed peak luminosity would seem to require an age of 200-380 ...
PowerPoint Presentation - Neutron stars, pulsars and black holes
... than 100 times per second (the first was spinning 640 times per second) threw the field for a loop. When some millisecond pulsars were discovered in old star clusters it was even more confusing. • Eventually it was determined that all millisecond pulsars were in close binary systems and were `spun u ...
... than 100 times per second (the first was spinning 640 times per second) threw the field for a loop. When some millisecond pulsars were discovered in old star clusters it was even more confusing. • Eventually it was determined that all millisecond pulsars were in close binary systems and were `spun u ...
stellar remenants
... gravity field has distorted space-time. • Einstein’s theory of relativity helps explain this. ...
... gravity field has distorted space-time. • Einstein’s theory of relativity helps explain this. ...
White Dwarfs and Neutron Stars
... • Neutron stars can form powerful jets of matter and energy • Previously only thought possible with black holes • Binary system with neutron star gaining matter from white dwarf companion’s atmosphere in an accretion disk • Neutron star is tiny compared to white dwarf but is very dense and about 14 ...
... • Neutron stars can form powerful jets of matter and energy • Previously only thought possible with black holes • Binary system with neutron star gaining matter from white dwarf companion’s atmosphere in an accretion disk • Neutron star is tiny compared to white dwarf but is very dense and about 14 ...
29.3 – Stellar Evolution
... •No energy left for fusion •Loses its outer shell, revealing core •Core heats and illuminates expanding gases = planetary nebula •Gravity causes star to collapse inward •Hot, dense core of matter = white dwarf ...
... •No energy left for fusion •Loses its outer shell, revealing core •Core heats and illuminates expanding gases = planetary nebula •Gravity causes star to collapse inward •Hot, dense core of matter = white dwarf ...
Aug 2015 supplement - Hermanus Astronomy
... Astronomers trained ALMA on galaxies that were known to be seen only about 800 million years after the Big Bang. They were not looking for the light from stars, but instead for the faint glow of ionized carbon coming from the clouds of gas from which the stars were forming. They wanted to study the ...
... Astronomers trained ALMA on galaxies that were known to be seen only about 800 million years after the Big Bang. They were not looking for the light from stars, but instead for the faint glow of ionized carbon coming from the clouds of gas from which the stars were forming. They wanted to study the ...
Stellar evolution - Chandra X
... about them. X-ray data reveal extreme or violent conditions where gas has been heated to very high temperatures or particles have been accelerated to extremely high energies. These conditions can exist near collapsed objects such as white dwarfs, neutron stars, and black holes; in giant bubbles of h ...
... about them. X-ray data reveal extreme or violent conditions where gas has been heated to very high temperatures or particles have been accelerated to extremely high energies. These conditions can exist near collapsed objects such as white dwarfs, neutron stars, and black holes; in giant bubbles of h ...
Searching for the Most Distant Black Holes in the Early
... – should be strong X-ray sources (from hot gas) – should be strong infrared sources (from hot dust) – should have very faint (or none) optical emission ...
... – should be strong X-ray sources (from hot gas) – should be strong infrared sources (from hot dust) – should have very faint (or none) optical emission ...
COSMOLOGY 1 An Introduction to the Universe
... striking "planetary nebula", much like the nebulae seen around the remnants of other stars. The carbon core will eventually cool and become a white dwarf, the dense dim remnant of a once bright star. ...
... striking "planetary nebula", much like the nebulae seen around the remnants of other stars. The carbon core will eventually cool and become a white dwarf, the dense dim remnant of a once bright star. ...
Stellar Evolution
... Sunlike stars: With a mass between .4 and 4 solar masses, use fusion to combine hydrogen into helium.When they run out of hydrogen (6 trillion to 310 million years), the outer layers of the star expand into a “red giant” while the core contracts and starts to fuse helium into carbon and oxygen. The ...
... Sunlike stars: With a mass between .4 and 4 solar masses, use fusion to combine hydrogen into helium.When they run out of hydrogen (6 trillion to 310 million years), the outer layers of the star expand into a “red giant” while the core contracts and starts to fuse helium into carbon and oxygen. The ...
Things that Go Bump in the Night – Lecture Notes
... having a very deep gravitational potential well ...
... having a very deep gravitational potential well ...
Pulsars
... • Pulsating X-ray sources / X-ray pulsators - compact objects (generally neutron stars) in binary systems Accrete matter from normal star companion (P ~ 10s, dP/dt < 0) ...
... • Pulsating X-ray sources / X-ray pulsators - compact objects (generally neutron stars) in binary systems Accrete matter from normal star companion (P ~ 10s, dP/dt < 0) ...
QSOs . Continuum Radiation Energy Source
... Small oval is the point source Sagittarius A* = center of galaxy ...
... Small oval is the point source Sagittarius A* = center of galaxy ...
Black Holes - Troy University
... If two stars orbit close enough to each other, mass gets pulled from one and falls (accretes) onto the other. The smaller the target object, the faster the gas moves and the hotter it gets. ...
... If two stars orbit close enough to each other, mass gets pulled from one and falls (accretes) onto the other. The smaller the target object, the faster the gas moves and the hotter it gets. ...
Lecture 17: General Relativity and Black Holes
... (a) Stars near the center of the galaxy have very small orbits and very high orbital speeds (b) X-ray flares detected from Sag A* have very short variation timescales. (c) Infrared observations indicate there is a bar at the galactic center. (d) is a very strong source of X-ray and synchrotron emiss ...
... (a) Stars near the center of the galaxy have very small orbits and very high orbital speeds (b) X-ray flares detected from Sag A* have very short variation timescales. (c) Infrared observations indicate there is a bar at the galactic center. (d) is a very strong source of X-ray and synchrotron emiss ...
SSS in young stellar populations: progenitors of the
... • Be stars are non-giant B stars which show emission lines in their spectra • Are known to be rapidly rotating, at 70-90% of breakup velocity (Townsend et al., 2004) • Emission lines believed to arise in decretion disk which forms due to massive rotation • Evidence that rapid rotation is due to CBE ...
... • Be stars are non-giant B stars which show emission lines in their spectra • Are known to be rapidly rotating, at 70-90% of breakup velocity (Townsend et al., 2004) • Emission lines believed to arise in decretion disk which forms due to massive rotation • Evidence that rapid rotation is due to CBE ...
A-105 Homework 1
... 2. (1 pt.) How can the contraction of an inert helium core trigger the ignition of a hydrogen-fusion shell? ...
... 2. (1 pt.) How can the contraction of an inert helium core trigger the ignition of a hydrogen-fusion shell? ...
What does X-ray light show us?
... also produced by such violent events as supernova explosions or the destruction of atoms, and by less dramatic events, such as the decay of radioactive material in space. Things like supernova explosions (the way massive stars die), neutron stars and pulsars, and black holes are all sources of celes ...
... also produced by such violent events as supernova explosions or the destruction of atoms, and by less dramatic events, such as the decay of radioactive material in space. Things like supernova explosions (the way massive stars die), neutron stars and pulsars, and black holes are all sources of celes ...
Fitting X-ray Spectra with Imperfect Models
... •Soft X-rays: corona, jet, shock •Absorption by: ISM, disk, accretion stream, nebula ...
... •Soft X-rays: corona, jet, shock •Absorption by: ISM, disk, accretion stream, nebula ...
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.