Ultraluminous X-ray Sources in Andromeda Galaxy
... in which an accreting black hole generates X-ray luminosities in excess of 1039 erg/s. The nature of the companion star and the underlying physics of the accretion process is not yet established with certainty. In particular, whether or not the accretion is super/sub Eddington is an open question, a ...
... in which an accreting black hole generates X-ray luminosities in excess of 1039 erg/s. The nature of the companion star and the underlying physics of the accretion process is not yet established with certainty. In particular, whether or not the accretion is super/sub Eddington is an open question, a ...
Clase-06_Star_Formation - Departamento de Astronomía
... collapse of the core temperature continues rising and H becomes ionized (HII) free e- pressure starts to balance the collapse that eventually halts in the core convective proto-star reachs the Hayashi limit in the CM diagram and enter the hydrostatic equilibrium regime (becoming a T-Tauri star ...
... collapse of the core temperature continues rising and H becomes ionized (HII) free e- pressure starts to balance the collapse that eventually halts in the core convective proto-star reachs the Hayashi limit in the CM diagram and enter the hydrostatic equilibrium regime (becoming a T-Tauri star ...
MHD_of_Accretion_Disks
... (i.e., neutron star dimension) and the gas is emitting as a blackbody, then its temperature will be of order 10^7 K. It will be a plentiful sourceof keV photons, as compact x-ray sources indeed are. The surface temperature decreases as one moves outward in the disk. The local luminosity of a disk sc ...
... (i.e., neutron star dimension) and the gas is emitting as a blackbody, then its temperature will be of order 10^7 K. It will be a plentiful sourceof keV photons, as compact x-ray sources indeed are. The surface temperature decreases as one moves outward in the disk. The local luminosity of a disk sc ...
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv •
... Explanation: How could a galaxy become shaped like a ring? The rim of the blue galaxy pictured on the right is an immense ring-like structure 150,000 light years in diameter composed of newly formed, extremely bright, massive stars. That galaxy, AM 0644-741, is known as a ring galaxy and was caused ...
... Explanation: How could a galaxy become shaped like a ring? The rim of the blue galaxy pictured on the right is an immense ring-like structure 150,000 light years in diameter composed of newly formed, extremely bright, massive stars. That galaxy, AM 0644-741, is known as a ring galaxy and was caused ...
Modeling Time Dependent Winds - Center for Computational Sciences
... • Solar wind originates in open magnetic field lies in coronal holes • Stellar winds from stars rotating near break-up are denser and cooler in the equatorial plane • Winds from accretion disks vary strongly with distance in the disk from the central object • Stellar winds in X-ray binary systems di ...
... • Solar wind originates in open magnetic field lies in coronal holes • Stellar winds from stars rotating near break-up are denser and cooler in the equatorial plane • Winds from accretion disks vary strongly with distance in the disk from the central object • Stellar winds in X-ray binary systems di ...
superbubbles vs super-galactic winds
... all the energetics from the starburst. Being massive, although smaller in numbers, they also reinsert into the ISM, through their winds and SN explosions, almost 40% of the starburst original mass. And thus from a starburst with an initial mass of 106 M one has to expect a total of almost 4 ×105 M ...
... all the energetics from the starburst. Being massive, although smaller in numbers, they also reinsert into the ISM, through their winds and SN explosions, almost 40% of the starburst original mass. And thus from a starburst with an initial mass of 106 M one has to expect a total of almost 4 ×105 M ...
Monthly Target Matrix Excel
... Each month the sky presents us with a dazzling assortment of spectacular objects on which to train our telescopes: variable stars, nebulae, galaxies, and clusters of galaxies, to name a few. As the Earth makes its yearly trip aroundthe Sun, different objects slide into view in the nighttime sky. Any ...
... Each month the sky presents us with a dazzling assortment of spectacular objects on which to train our telescopes: variable stars, nebulae, galaxies, and clusters of galaxies, to name a few. As the Earth makes its yearly trip aroundthe Sun, different objects slide into view in the nighttime sky. Any ...
CHANDRA on ,
... The Chandra light curve shows a high variability but its analysis fails to detect any coherent periodicity up to a frequency of 0.05 Hz. Hardness ratio versus intensity analyses demonstrate that the relative contributions of the [1.5–3] Å, [3–6] Å, and [6–16] Å energy bands to the total flux change ...
... The Chandra light curve shows a high variability but its analysis fails to detect any coherent periodicity up to a frequency of 0.05 Hz. Hardness ratio versus intensity analyses demonstrate that the relative contributions of the [1.5–3] Å, [3–6] Å, and [6–16] Å energy bands to the total flux change ...
Document
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more precisely, to high-frequency-peaked BL Lac – HBL). ...
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more precisely, to high-frequency-peaked BL Lac – HBL). ...
AGN jets
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more precisely, to high-frequency-peaked BL Lac – HBL). ...
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more precisely, to high-frequency-peaked BL Lac – HBL). ...
The Radio and X-ray Jet
... In the radio it looks quite different, as can be seen in these three images, taken at different resolutions. It seems to have a jet of relativistic particles squirting out in both directions. ...
... In the radio it looks quite different, as can be seen in these three images, taken at different resolutions. It seems to have a jet of relativistic particles squirting out in both directions. ...
Supernova and Supernova Remnants lec 1-2
... From total luminosity derive M Ni that has been synthesized and thus the amount of Fe that has been produced. SNe Ia :the main producer of iron in the universe. Their ...
... From total luminosity derive M Ni that has been synthesized and thus the amount of Fe that has been produced. SNe Ia :the main producer of iron in the universe. Their ...
STUDY GUIDE FOR CHAPTER 1
... B. Different types of stars are in different regions. You should know what types they are and what regions of the H-R diagram they are found in. 1. Where are the supergiants? 2. Where are the white dwarfs? 3. The main sequence is where most of the stars are. a. What does it look like? b. For stars o ...
... B. Different types of stars are in different regions. You should know what types they are and what regions of the H-R diagram they are found in. 1. Where are the supergiants? 2. Where are the white dwarfs? 3. The main sequence is where most of the stars are. a. What does it look like? b. For stars o ...
vuorinen_neutron_stars
... 2. but not impossible if you systematically use 1st principles results at low and high density 3. Discovering massive stars places strong constraints on nuclear matter EoS due to tension with soft pQCD pressure 4. pQCD constraint useful even if no quark matter present in stars ...
... 2. but not impossible if you systematically use 1st principles results at low and high density 3. Discovering massive stars places strong constraints on nuclear matter EoS due to tension with soft pQCD pressure 4. pQCD constraint useful even if no quark matter present in stars ...
Cosmic Collisions ( 12 MB)
... not slowed by the impact, because it does not interact directly with itself or the gas except through gravity, and separates from the normal matter. The animation ends by dissolving into an image showing the hot gas seen with Chandra (pink) and the cluster mass as inferred by gravitational lensing ( ...
... not slowed by the impact, because it does not interact directly with itself or the gas except through gravity, and separates from the normal matter. The animation ends by dissolving into an image showing the hot gas seen with Chandra (pink) and the cluster mass as inferred by gravitational lensing ( ...
Goal: To understand how stars form.
... particles falling into the center (everything not lucky enough to start orbiting). • This creates heat from the kinetic energy of the infalling materials. • NOTE: kinetic energy is the energy of motion. If something stops moving, that energy has to go somewhere. In collisions like this it goes into ...
... particles falling into the center (everything not lucky enough to start orbiting). • This creates heat from the kinetic energy of the infalling materials. • NOTE: kinetic energy is the energy of motion. If something stops moving, that energy has to go somewhere. In collisions like this it goes into ...
Acting Out the Life Cycle of Stars - University of Texas Astronomy
... shoulder of Orion, Betelgeuse, is a red giant. e. For stars that are less than about 8 times the mass of the Sun, the envelope of the red giant will gradually float away into space (float away envelope students) as the core contracts (get cozy core students). The floating away gas that used to be th ...
... shoulder of Orion, Betelgeuse, is a red giant. e. For stars that are less than about 8 times the mass of the Sun, the envelope of the red giant will gradually float away into space (float away envelope students) as the core contracts (get cozy core students). The floating away gas that used to be th ...
Formation of a Black Hole in the Dark - CEA-Irfu
... the parent stellar association, including the progenitor of Cygnus X-1, were formed over a short time span (8). The main sequence star of higher mass found in Cyg OB3 has a spectral type O7 V and a mass of 40 MՎ (8). Because more massive stars evolve faster, the lower limit for the initial mass of t ...
... the parent stellar association, including the progenitor of Cygnus X-1, were formed over a short time span (8). The main sequence star of higher mass found in Cyg OB3 has a spectral type O7 V and a mass of 40 MՎ (8). Because more massive stars evolve faster, the lower limit for the initial mass of t ...
The Hidden Lives of Galaxies NSTA 2001
... stars) orbiting in a galaxy, we’d expect them to obey the same laws. As distance from the center of the galaxy increases, we should get to a point where almost all of the galaxy’s mass is inside the orbit of the furthest objects. At this point, the central mass would be practically constant, and we ...
... stars) orbiting in a galaxy, we’d expect them to obey the same laws. As distance from the center of the galaxy increases, we should get to a point where almost all of the galaxy’s mass is inside the orbit of the furthest objects. At this point, the central mass would be practically constant, and we ...
Stellar Evolution after the Main Sequence
... The Earth will vaporize. The Earth will melt into a cinder, but remain ...
... The Earth will vaporize. The Earth will melt into a cinder, but remain ...
Full Poster - Cool Cosmos
... moon rocks, astronomers must rely on collecting and analyzing the faint light from distant objects in order to study the cosmos. This fact is even more remarkable when you consider the vastness of space. Light may travel for billions of years before reaching our telescopes. Astronomy is primarily a ...
... moon rocks, astronomers must rely on collecting and analyzing the faint light from distant objects in order to study the cosmos. This fact is even more remarkable when you consider the vastness of space. Light may travel for billions of years before reaching our telescopes. Astronomy is primarily a ...
Powerpoint for today
... Composition unknown. Probably mostly exotic particles that don't interact with ordinary matter at all (except gravity). Some may be brown dwarfs, dead white dwarfs … Most likely it's a dark halo surrounding the Milky Way. ...
... Composition unknown. Probably mostly exotic particles that don't interact with ordinary matter at all (except gravity). Some may be brown dwarfs, dead white dwarfs … Most likely it's a dark halo surrounding the Milky Way. ...
Components of the Milky Way
... • Solar luminosity is Lsun = 3.9 x 1033 erg / s • Mass fraction of hydrogen in the Sun X = 0.7 • Stars leave the main sequence before all the hydrogen is exhausted - fraction consumed h = 0.1. ASTR 3730: Fall 2003 ...
... • Solar luminosity is Lsun = 3.9 x 1033 erg / s • Mass fraction of hydrogen in the Sun X = 0.7 • Stars leave the main sequence before all the hydrogen is exhausted - fraction consumed h = 0.1. ASTR 3730: Fall 2003 ...
R. Bender (ESO)
... formation processes that may have produced a large fraction of all stars in the universe, especially those in spheroids. ALMA will allow to probe the collapse of the first massive galaxy fragments before they have largely turned into stars. ALMA can detect molecular absorption lines in many quas ...
... formation processes that may have produced a large fraction of all stars in the universe, especially those in spheroids. ALMA will allow to probe the collapse of the first massive galaxy fragments before they have largely turned into stars. ALMA can detect molecular absorption lines in many quas ...
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.