The Milky Way - Chandra X
... Today we know that the Milky Way is our home galaxy - a vast rotating spiral of gas, dust, and hundreds of billions of stars. The Sun and its planetary system formed in the outer reaches of the Milky Way about 4.5 billion years ago. In the center of the galaxy is the bar-shaped galactic bulge which ...
... Today we know that the Milky Way is our home galaxy - a vast rotating spiral of gas, dust, and hundreds of billions of stars. The Sun and its planetary system formed in the outer reaches of the Milky Way about 4.5 billion years ago. In the center of the galaxy is the bar-shaped galactic bulge which ...
Stars and Galaxies PP 2013
... High mass supergiants may undergo a supernova, where the core suddenly collapses and explodes. A neutron star is what remains after the supernova. It is composed mainly of neutrons and is very dense. If it spins and releases radiation it is called a pulsar. ...
... High mass supergiants may undergo a supernova, where the core suddenly collapses and explodes. A neutron star is what remains after the supernova. It is composed mainly of neutrons and is very dense. If it spins and releases radiation it is called a pulsar. ...
Paper (pdf)
... Astronomical observations at all wavelengths have revealed the existence of numerous types of objects where extremely energetic and exotic phenomena occur. These include X-ray binaries and active galactic nuclei (AGN) among others, where accretion onto a compact object (collapsed star or massive bla ...
... Astronomical observations at all wavelengths have revealed the existence of numerous types of objects where extremely energetic and exotic phenomena occur. These include X-ray binaries and active galactic nuclei (AGN) among others, where accretion onto a compact object (collapsed star or massive bla ...
Barium Stars Observed with the Coude Echelle Spectrometer
... The optical counterpart of the pulsating X-ray source H 2252035 appeared to be an interesting object for optical astronomers also. In the X-ray domain it shows the same characterislics as other pulsars. Its X-ray emission is modulated with a period of about 805 s, the pulse amplitude being about 25 ...
... The optical counterpart of the pulsating X-ray source H 2252035 appeared to be an interesting object for optical astronomers also. In the X-ray domain it shows the same characterislics as other pulsars. Its X-ray emission is modulated with a period of about 805 s, the pulse amplitude being about 25 ...
ppt - UCL
... This upper limit in dP/dt=0 permits an unambiguous determination of the peaks in the Ch00 and R98 power spectra. Adding these to the linear square fit gives P0 = 8.39107 ± 0.00005 s, dP/dt = 2.7 10-13 ± 2.5 10-13 s/s. The 68, 90 and 99% ...
... This upper limit in dP/dt=0 permits an unambiguous determination of the peaks in the Ch00 and R98 power spectra. Adding these to the linear square fit gives P0 = 8.39107 ± 0.00005 s, dP/dt = 2.7 10-13 ± 2.5 10-13 s/s. The 68, 90 and 99% ...
Quasars - Ann Arbor Earth Science
... radio galaxy - a galaxy showing unusually strong radio emission, too intense to be produced by the normal processes of starbirth and stardeath. This may come only from the nucleus, or from a pair of more or less symmetric lobes stretching as far as a million light-years. Many show emission from je ...
... radio galaxy - a galaxy showing unusually strong radio emission, too intense to be produced by the normal processes of starbirth and stardeath. This may come only from the nucleus, or from a pair of more or less symmetric lobes stretching as far as a million light-years. Many show emission from je ...
B - Department of Physics and Astronomy
... D. They are burning helium into carbon and oxygen in a shell around their cores 4. In the process of helium shell fusion in low-mass stars near the end of their lives, the stars moves upward and to the right on the asymptotic giant branch of the Hertzsprung-Russell diagram. In this process, the star ...
... D. They are burning helium into carbon and oxygen in a shell around their cores 4. In the process of helium shell fusion in low-mass stars near the end of their lives, the stars moves upward and to the right on the asymptotic giant branch of the Hertzsprung-Russell diagram. In this process, the star ...
Frequency x Energy Spectral fitting is degenerate : timing
... The QPO in NGC 5408 X-1, can indicate the likely mass of the source by determining the likely GBH analogy. Done by Strohmayer & Mushotzky 2009 – type C LFQPO of GBHs. ...
... The QPO in NGC 5408 X-1, can indicate the likely mass of the source by determining the likely GBH analogy. Done by Strohmayer & Mushotzky 2009 – type C LFQPO of GBHs. ...
Credit: X-ray: NASA/CXC/UMass/D. Wang et al.; Optical: Caltech/SSC/S.Stolovy
... SGR A* CREDIT: NASA/UMASS/D. WANG ...
... SGR A* CREDIT: NASA/UMASS/D. WANG ...
Siriusposter
... white dwarfs. At these energies, white dwarfs are far brighter than most normal stars, and with ROSAT’s help we have been able to identify over 20 of these degenerate objects in binaries with bright, normal companions, just like the Sirius system. At optical wavelengths the white dwarfs are unresolv ...
... white dwarfs. At these energies, white dwarfs are far brighter than most normal stars, and with ROSAT’s help we have been able to identify over 20 of these degenerate objects in binaries with bright, normal companions, just like the Sirius system. At optical wavelengths the white dwarfs are unresolv ...
Physics 127 Descriptive Astronomy Homework #19 Key
... matter. Perhaps the most compelling is the rather flat rotational curve of the galaxy, i.e., the speeds at which stars and clouds orbit about our galactic center change little with increasing distance from our galactic center all the way out to the most remote objects we can detect. The necessary gr ...
... matter. Perhaps the most compelling is the rather flat rotational curve of the galaxy, i.e., the speeds at which stars and clouds orbit about our galactic center change little with increasing distance from our galactic center all the way out to the most remote objects we can detect. The necessary gr ...
SSM hardware
... Monitor known bright sources - sampling time few minutes - several samples/day; monitor for many months. ...
... Monitor known bright sources - sampling time few minutes - several samples/day; monitor for many months. ...
JSchreiberTalk3 - FSU High Energy Physics
... As universe expands, density enhancements either grew or dispersed. Smaller, more dense density enhancements first to collapse. These first “lumps” that broke free contained some H and He, but mostly dark matter. ...
... As universe expands, density enhancements either grew or dispersed. Smaller, more dense density enhancements first to collapse. These first “lumps” that broke free contained some H and He, but mostly dark matter. ...
Quiz on Chapter 11
... 11-26. A friend takes a ride on a spaceship to a distant star and returns to Earth. You and your friend were the same age when your friend left on the spaceship. When your friend returns she a) will be the same age as you. b) will be younger than you. X c) will be older than you. d) could be older o ...
... 11-26. A friend takes a ride on a spaceship to a distant star and returns to Earth. You and your friend were the same age when your friend left on the spaceship. When your friend returns she a) will be the same age as you. b) will be younger than you. X c) will be older than you. d) could be older o ...
8.4 White Dwarfs
... Loose protons and electrons near the surface of the neutron star will be sweep up and stream along the magnetic field lines towards the north and south magnetic poles of the neutron star. The magnetic axis of the neutron star does not necessarily have to be aligned with the rotation axis (like the ...
... Loose protons and electrons near the surface of the neutron star will be sweep up and stream along the magnetic field lines towards the north and south magnetic poles of the neutron star. The magnetic axis of the neutron star does not necessarily have to be aligned with the rotation axis (like the ...
Pulsars
... • only 8 pulsars associated with visible SNRs (pulsar lifetime 1-10million years, SNRs 10-100 thousand... so consistent) • but not all SN may produce pulsars!!! ...
... • only 8 pulsars associated with visible SNRs (pulsar lifetime 1-10million years, SNRs 10-100 thousand... so consistent) • but not all SN may produce pulsars!!! ...
Circumstellar interaction of supernovae and gamma-ray bursts
... Blast wave shock : Ejecta expansion speed is much higher than sound speed. Shocked CSM: Interaction of blast wave with CSM . CSM is accelerated, compressed, heated and shocked. ...
... Blast wave shock : Ejecta expansion speed is much higher than sound speed. Shocked CSM: Interaction of blast wave with CSM . CSM is accelerated, compressed, heated and shocked. ...
Galaxy classification
... Sometimes relativistic jets of hot plasma are formed by strong magnetic fields in the material around a rotating black hole. Nearly every nearby galaxy appears to have a super-massive black hole (∼10^6 to 10^9 M⊙ ) at its center Amongst the galaxies harboring a super-massive black hole, a small frac ...
... Sometimes relativistic jets of hot plasma are formed by strong magnetic fields in the material around a rotating black hole. Nearly every nearby galaxy appears to have a super-massive black hole (∼10^6 to 10^9 M⊙ ) at its center Amongst the galaxies harboring a super-massive black hole, a small frac ...
The nature of the ultraluminous X-ray sources inside galaxies and
... These are only some of the many cases which have now been found which provide strong circumstantial evidence that QSOs originate in the centers of active galaxies and are ejected from them. Evidence based on a sample of 39 X-ray emitting QSOs associated with active galaxies, including some of the ca ...
... These are only some of the many cases which have now been found which provide strong circumstantial evidence that QSOs originate in the centers of active galaxies and are ejected from them. Evidence based on a sample of 39 X-ray emitting QSOs associated with active galaxies, including some of the ca ...
The Milky Way - Indiana University Astronomy
... The dust is transparent to infrared light, and we can see through the gas and dust to observe the Galactic Center ...
... The dust is transparent to infrared light, and we can see through the gas and dust to observe the Galactic Center ...
Scales of the Universe
... The gas is heated by the motion through it of long lines of magnetic force, which act like whips. The gas is being “whipped”. ...
... The gas is heated by the motion through it of long lines of magnetic force, which act like whips. The gas is being “whipped”. ...
galaxies - GEOCITIES.ws
... its carbon into iron, but it does not possess enough outer pressure to do so. • The outer layers of the star drift off into space, and become what is called a planetary nebula. Its core collapses into a white dwarf star. ...
... its carbon into iron, but it does not possess enough outer pressure to do so. • The outer layers of the star drift off into space, and become what is called a planetary nebula. Its core collapses into a white dwarf star. ...
ii. star clusters
... 2. Outer layers expand to _____ RSUN 3. Instability - outer layers fluctuate 4. Shell finally ____________ into space 5. Hot, dense core *illuminates cool, rarefied shell - a ________ ________ Ex/ ________ Nebula (M57) ...
... 2. Outer layers expand to _____ RSUN 3. Instability - outer layers fluctuate 4. Shell finally ____________ into space 5. Hot, dense core *illuminates cool, rarefied shell - a ________ ________ Ex/ ________ Nebula (M57) ...
English Summary
... Furthermore, we have used the energy at radio and X-ray wavelengths to study how matter pours into the black hole (Chapter 4). Results show that in fact our sources accrete much less matter than quasars. Furthermore, the way the accretion proceeds is fundamentally different. In quasars accretion is ...
... Furthermore, we have used the energy at radio and X-ray wavelengths to study how matter pours into the black hole (Chapter 4). Results show that in fact our sources accrete much less matter than quasars. Furthermore, the way the accretion proceeds is fundamentally different. In quasars accretion is ...
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.