Bubble Nebulae Around Ultra-luminous X
... luminosity of a stellar-mass compact object, assuming isotropic emission. The irregular variability, observed on time scales from seconds to years, suggests that ULXs are binary systems containing a compact object that is either a stellarmass black hole with beamed or super-Eddington emission or an ...
... luminosity of a stellar-mass compact object, assuming isotropic emission. The irregular variability, observed on time scales from seconds to years, suggests that ULXs are binary systems containing a compact object that is either a stellarmass black hole with beamed or super-Eddington emission or an ...
SIMBOL-X The
... assumed for the realization mirror shells based on single layer mirrors. The up grade of the method to the fabrication of multilayer mirrors is under development and funded by ASI • Different trade-offs must be evaluated… e.g. angular resolution / field of view / low energy response / time and energ ...
... assumed for the realization mirror shells based on single layer mirrors. The up grade of the method to the fabrication of multilayer mirrors is under development and funded by ASI • Different trade-offs must be evaluated… e.g. angular resolution / field of view / low energy response / time and energ ...
No Slide Title
... The Skylark research rocket • first test flight at Woomera in February 1957 • payload of 150 kg to 300 km • Sun, Moon and star-pointing versions from 1964 • Leicester group set up in 1960 with £13k grant to `study solar and stellar X-ray emission’ • PC on Sun in September 1961 (Sco X-1 also in view ...
... The Skylark research rocket • first test flight at Woomera in February 1957 • payload of 150 kg to 300 km • Sun, Moon and star-pointing versions from 1964 • Leicester group set up in 1960 with £13k grant to `study solar and stellar X-ray emission’ • PC on Sun in September 1961 (Sco X-1 also in view ...
X-ray Binaries and Cygnus X-1
... disk. Because of the internal friction caused by the spiraling particles, the disk heats up to millions of Kelvins and emits X-rays. There are three types compact objects: neutrons stars, white dwarfs, and black holes. In 1964, Cygnus X-1 was first discovered. It is the brightest X-ray source in the ...
... disk. Because of the internal friction caused by the spiraling particles, the disk heats up to millions of Kelvins and emits X-rays. There are three types compact objects: neutrons stars, white dwarfs, and black holes. In 1964, Cygnus X-1 was first discovered. It is the brightest X-ray source in the ...
The Main Features of the X
... Eridanus Enhancement: from the Orion superbubble, ~1200 ly across, being energized by stars in the Orion OB1 association Monogem Ring: a SNR in a low density region of the Galaxy, thus evolved into a low surface-brightness remnant The Crab: a SNR recorded in 1054 and now observed to contain a 33 ms ...
... Eridanus Enhancement: from the Orion superbubble, ~1200 ly across, being energized by stars in the Orion OB1 association Monogem Ring: a SNR in a low density region of the Galaxy, thus evolved into a low surface-brightness remnant The Crab: a SNR recorded in 1054 and now observed to contain a 33 ms ...
PowerPoint - Chandra X
... these stars. According to some theoretical models, large flares could produce strong turbulence in a planet-forming disk around a young star. Such turbulence might affect the position of rocky, Earth-like planets as they form and prevent them from rapidly migrating towards the young star. Therefore, ...
... these stars. According to some theoretical models, large flares could produce strong turbulence in a planet-forming disk around a young star. Such turbulence might affect the position of rocky, Earth-like planets as they form and prevent them from rapidly migrating towards the young star. Therefore, ...
Paul Green - Chandra X-Ray Observatory (CXC)
... Professor Philip Morrison of Cornell thinks the X rays may be generated when starlight picks up energy from high-speed electrons far out in space. Professor Minoru Oda of M.I.T. figures that the X rays come from a magnetic field surrounding the edges of the galactic nucleus. British Cosmologist Fred ...
... Professor Philip Morrison of Cornell thinks the X rays may be generated when starlight picks up energy from high-speed electrons far out in space. Professor Minoru Oda of M.I.T. figures that the X rays come from a magnetic field surrounding the edges of the galactic nucleus. British Cosmologist Fred ...
parents_weekend_2006 - Astronomy at Swarthmore College
... Cohen, who studies massive stars and stellar xrays, and Eric Jensen, who studies star and planet formation. Physics professor Michael Brown studies magnetic phenomena in his laboratory, with applications to the Sun. At any given time, we have roughly half-a-dozen students working with us. ...
... Cohen, who studies massive stars and stellar xrays, and Eric Jensen, who studies star and planet formation. Physics professor Michael Brown studies magnetic phenomena in his laboratory, with applications to the Sun. At any given time, we have roughly half-a-dozen students working with us. ...
Atomic Physics Explaining the Universe
... that IXO has been recommended for approximately $200M in technology development funding for this decade. ...
... that IXO has been recommended for approximately $200M in technology development funding for this decade. ...
poster
... Abstract. DG Tau is a classical T Tauri star showing an unusual X-ray spectrum, best described by two thermal components with different absorption columns. The soft X-rays are less absorbed than the hard X-rays, presumably coronal, component. This rules out stellar accretion as the origin of the sof ...
... Abstract. DG Tau is a classical T Tauri star showing an unusual X-ray spectrum, best described by two thermal components with different absorption columns. The soft X-rays are less absorbed than the hard X-rays, presumably coronal, component. This rules out stellar accretion as the origin of the sof ...
DoAr21_AAS2005 - Astronomy at Swarthmore College
... New high-resolution spectroscopy: We obtained H-alpha data showing broad emission wings and night-to-night variability. We also measured v sin i ~ 80 km/s. There seem to be several indicators of circumstellar material including at least modest accretion. ...
... New high-resolution spectroscopy: We obtained H-alpha data showing broad emission wings and night-to-night variability. We also measured v sin i ~ 80 km/s. There seem to be several indicators of circumstellar material including at least modest accretion. ...
PowerPoint - Chandra X
... detected by Chandra are shown in gold, while optical data from ESO’s Very Large Telescope are shown in yellowwhite and blue, and infrared data from Spitzer are red. ...
... detected by Chandra are shown in gold, while optical data from ESO’s Very Large Telescope are shown in yellowwhite and blue, and infrared data from Spitzer are red. ...
PowerPoint - Chandra X
... The relatively strong X-ray luminosity of CoRoT-2A may be due to the interaction with the planet, which could have spun the star up, or enhanced its magnetic activity. ...
... The relatively strong X-ray luminosity of CoRoT-2A may be due to the interaction with the planet, which could have spun the star up, or enhanced its magnetic activity. ...
X Ray Astronomy
... instruments to detect x rays are taken to higher altitudes using balloons , rockets etc. ...
... instruments to detect x rays are taken to higher altitudes using balloons , rockets etc. ...
hotstar_xrays
... zones, magnetic fields, or the associated magnetic dynamo and corona that our sun has. Thus their discovery 20 years ago as relatively strong soft X-ray sources was a surprise. Hot stars do have strong radiation-driven winds. These winds are subject to a line-driving instability which can lead to sh ...
... zones, magnetic fields, or the associated magnetic dynamo and corona that our sun has. Thus their discovery 20 years ago as relatively strong soft X-ray sources was a surprise. Hot stars do have strong radiation-driven winds. These winds are subject to a line-driving instability which can lead to sh ...
PowerPoint - Chandra X
... solar system is shown in the image. The image is brighter to the upper right -- the side of the nebula nearest the Earth -- where there is less obscuring material to block the X-ray emission. NGC 7027 is the remains of a sun-like star that has ejected much of its mass to expose its hot core. The X-r ...
... solar system is shown in the image. The image is brighter to the upper right -- the side of the nebula nearest the Earth -- where there is less obscuring material to block the X-ray emission. NGC 7027 is the remains of a sun-like star that has ejected much of its mass to expose its hot core. The X-r ...
X-ray Astronomy
... • The temperature of the shock-heated gas ranges from 60 MK in the central regions to 3 MK on the horseshoe-shaped outer structure. "The Chandra image contains some puzzles for existing ideas of how a star can produce such hot and intense X-rays," says Prof. Kris Davidson of the University of Minnes ...
... • The temperature of the shock-heated gas ranges from 60 MK in the central regions to 3 MK on the horseshoe-shaped outer structure. "The Chandra image contains some puzzles for existing ideas of how a star can produce such hot and intense X-rays," says Prof. Kris Davidson of the University of Minnes ...
PowerPoint - Chandra X
... NGC 1068: An active galaxy about 50 million light years from Earth. Chandra X-ray Observatory ACIS/HETGS image. ...
... NGC 1068: An active galaxy about 50 million light years from Earth. Chandra X-ray Observatory ACIS/HETGS image. ...
X-ray astronomy
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects. X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites. X-ray astronomy is the space science related to a type of space telescope that can see farther than standard light-absorption telescopes, such as the Mauna Kea Observatories, via x-ray radiation.X-ray emission is expected from astronomical objects that contain extremely hot gasses at temperatures from about a million kelvin (K) to hundreds of millions of kelvin (MK). Although X-rays have been observed emanating from the Sun since the 1940s, the discovery in 1962 of the first cosmic X-ray source was a surprise. This source is called Scorpius X-1 (Sco X-1), the first X-ray source found in the constellation Scorpius. The X-ray emission of Scorpius X-1 is 10,000 times greater than its visual emission, whereas that of the Sun is about a million times less. In addition, the energy output in X-rays is 100,000 times greater than the total emission of the Sun in all wavelengths. Based on discoveries in this new field of X-ray astronomy, starting with Scorpius X-1, Riccardo Giacconi received the Nobel Prize in Physics in 2002. It is now known that such X-ray sources as Sco X-1 are compact stars, such as neutron stars or black holes. Material falling into a black hole may emit X-rays, but the black hole itself does not. The energy source for the X-ray emission is gravity. Infalling gas and dust is heated by the strong gravitational fields of these and other celestial objects.Many thousands of X-ray sources are known. In addition, the space between galaxies in galaxy clusters is filled with a very hot, but very dilute gas at a temperature between 10 and 100 megakelvins (MK). The total amount of hot gas is five to ten times the total mass in the visible galaxies.