dtu7ech13 - Fort Thomas Independent Schools
... Cosmic rays are high-speed particles (mostly hydrogen and other atomic nuclei) in space. Many of them are believed to have been created as a result of ...
... Cosmic rays are high-speed particles (mostly hydrogen and other atomic nuclei) in space. Many of them are believed to have been created as a result of ...
Homework #1: Due in class Thursday February 2nd
... picture in the Chapter of the textbook titled `Our Star’). Why is this the case? Visible light and X-rays are both electromagnetic radiation, but X-rays have much shorter wavelengths (higher photon energies). Only extremely hot gases (millions of degrees) emit significant X-ray radiation, whereas vi ...
... picture in the Chapter of the textbook titled `Our Star’). Why is this the case? Visible light and X-rays are both electromagnetic radiation, but X-rays have much shorter wavelengths (higher photon energies). Only extremely hot gases (millions of degrees) emit significant X-ray radiation, whereas vi ...
Black Holes: The Ultimate Abyss from discovery channel
... Black Holes: The Ultimate Abyss from discovery channel MEDIA ...
... Black Holes: The Ultimate Abyss from discovery channel MEDIA ...
Stellar Notes
... since you can’t really SEE them, only their effect, its just a really solid theory. ...
... since you can’t really SEE them, only their effect, its just a really solid theory. ...
How the Universe Works Extreme Stars Name 1. When a star dies
... How the Universe Works Extreme Stars Name _______________ 1. When a star dies (gravity) (fusion) wins out. 2. The sun will run out of fuel in about (3) (7) (10) billion years. 3. When the sun runs out of hydrogen fuel, it will become a (red giant) (neutron star) (black hole). 4. Eventually, the heli ...
... How the Universe Works Extreme Stars Name _______________ 1. When a star dies (gravity) (fusion) wins out. 2. The sun will run out of fuel in about (3) (7) (10) billion years. 3. When the sun runs out of hydrogen fuel, it will become a (red giant) (neutron star) (black hole). 4. Eventually, the heli ...
Folie 1
... Superconducting type I protons (instead of type II) or neutrons are normal in the outer core ...
... Superconducting type I protons (instead of type II) or neutrons are normal in the outer core ...
High Energy Processes in Young Stellar Objects
... – Continuous emission, optically thin thermal bresmsstrahlung with associated ionized metal emisson lines from multitemperature plasmas with 1
... – Continuous emission, optically thin thermal bresmsstrahlung with associated ionized metal emisson lines from multitemperature plasmas with 1
Discovering X-ray Bright Neutron Stars for Current and Next-Generation
... A Swift INS Survey • Swift is an excellent platform for many-target surveys (Fox 04) • Rapid slewing give high duty cycle for short observations (c.f. Chandra, XMM) • Multiple targets per orbit • X-ray telescope – Better PSF than ROSAT PSPC – Similar sensitivity – Detect BSC sources in < 1 ksec ...
... A Swift INS Survey • Swift is an excellent platform for many-target surveys (Fox 04) • Rapid slewing give high duty cycle for short observations (c.f. Chandra, XMM) • Multiple targets per orbit • X-ray telescope – Better PSF than ROSAT PSPC – Similar sensitivity – Detect BSC sources in < 1 ksec ...
15compact2s
... Above the Limit If a stellar core has mass greater than the Chandrasehkar limit (1.4 Msun), electron degeneracy pressure cannot support it ...
... Above the Limit If a stellar core has mass greater than the Chandrasehkar limit (1.4 Msun), electron degeneracy pressure cannot support it ...
Harvey`s presentation
... of General Relativity Trace their evolution with cosmic time, their contribution to the energy output of the Universe and their effect on galaxy formation ...
... of General Relativity Trace their evolution with cosmic time, their contribution to the energy output of the Universe and their effect on galaxy formation ...
White Dwarf Stars
... we see pulses of radiation. Such objects are called pulsars. Not all neutron stars are observable as pulsars. • Pulsars were discovered by Anthony Hewish and Jocelyn ...
... we see pulses of radiation. Such objects are called pulsars. Not all neutron stars are observable as pulsars. • Pulsars were discovered by Anthony Hewish and Jocelyn ...
parents_weekend_2006 - Astronomy at Swarthmore College
... 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. ...
... 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. ...
White Dwarf Stars - University of California Observatories
... we see pulses of radiation. Such objects are called pulsars. Not all neutron stars are observable as pulsars. • Pulsars were discovered by Anthony Hewish and Jocelyn ...
... we see pulses of radiation. Such objects are called pulsars. Not all neutron stars are observable as pulsars. • Pulsars were discovered by Anthony Hewish and Jocelyn ...
Astronomy - The-A-List
... answer questions relating to orbital motions of binary and multiple star systems Use parallax, spectroscopic parallax, and the distance modulus to calculate distances to Type I and II Cepheids ...
... answer questions relating to orbital motions of binary and multiple star systems Use parallax, spectroscopic parallax, and the distance modulus to calculate distances to Type I and II Cepheids ...
PowerPoint - Chandra X
... With an age of about 200 million years this is the oldest isolated pulsar ever detected in X-rays. Among pulsar that have not been spun-up in a binary system, it is over 10 times older than the previous record holder with an X-ray detection. At a distance of 770 light years, it is one of the nearest ...
... With an age of about 200 million years this is the oldest isolated pulsar ever detected in X-rays. Among pulsar that have not been spun-up in a binary system, it is over 10 times older than the previous record holder with an X-ray detection. At a distance of 770 light years, it is one of the nearest ...
Black Holes in M83 - Astronomical Society of the Pacific
... • The X-ray characteristics imply this black hole must be 40-100 times the mass of the sun. • Evidence suggests that the companion star is a red giant several times the mass of the Sun that has expanded enough for the black hole to drag material from it to create a bluish accretion disk as it consum ...
... • The X-ray characteristics imply this black hole must be 40-100 times the mass of the sun. • Evidence suggests that the companion star is a red giant several times the mass of the Sun that has expanded enough for the black hole to drag material from it to create a bluish accretion disk as it consum ...
Galactic Neighborhood and (Chandra-enabled) X-ray Astrophysics Q. Daniel Wang
... Approach 2: Deep large-scale X-ray mapping: • Individual observations have to be deep to remove enough background sources, which causes the cosmic variance. • To check physical properties of hot plasma near outer boundaries if they are present. Mkn 231, 0.5 Ms ACIS 0.5-8 keV Veilleux et al. 201 ...
... Approach 2: Deep large-scale X-ray mapping: • Individual observations have to be deep to remove enough background sources, which causes the cosmic variance. • To check physical properties of hot plasma near outer boundaries if they are present. Mkn 231, 0.5 Ms ACIS 0.5-8 keV Veilleux et al. 201 ...
Universe, Earth, and The Solar System Characteristics of Stars
... A white dwarf is only about the size of the Earth but as much as mass as the sun. A neutron star is the remains of high-mass stars. A black hole is an object with gravity so strong that not even light can escape. These are usually formed from the death of the most massive stars. ...
... A white dwarf is only about the size of the Earth but as much as mass as the sun. A neutron star is the remains of high-mass stars. A black hole is an object with gravity so strong that not even light can escape. These are usually formed from the death of the most massive stars. ...
!
... Cygnus X-1 is believed to be a black hole. Give two examples of how astronomers can (sometimes) determine whether an X-ray-emitting object is a neutron star or black hole. (2 points)! ...
... Cygnus X-1 is believed to be a black hole. Give two examples of how astronomers can (sometimes) determine whether an X-ray-emitting object is a neutron star or black hole. (2 points)! ...
High Energy Astrophysics and Transient Science (or, a tale of radio
... In mid-2013 the infalling gas cloud will fall to within 36 light hours of the supermassive black hole and accretion (→ X-rays) should commence ...
... In mid-2013 the infalling gas cloud will fall to within 36 light hours of the supermassive black hole and accretion (→ X-rays) should commence ...
Chandra and NIR Observations of Galactic HII Regions
... detected with Chandra, with LX in the range 5.3´1030 – 1.8x1032 ergs s-1, LX/Lbol in the range 1.4x10-8 – 6.8x10-8, and kT from 0.49–0.96 keV. • The 2-Myr old O stars in NGC 6611 have relatively soft X-ray spectra and low LX/Lbol , like many nearby O stars whose winds are thought to drive instabilit ...
... detected with Chandra, with LX in the range 5.3´1030 – 1.8x1032 ergs s-1, LX/Lbol in the range 1.4x10-8 – 6.8x10-8, and kT from 0.49–0.96 keV. • The 2-Myr old O stars in NGC 6611 have relatively soft X-ray spectra and low LX/Lbol , like many nearby O stars whose winds are thought to drive instabilit ...
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.