Astronomy Scavenger Hunt Distances 1. What is the
... 21. Light travels as waves, and one property of waves is their wavelength. What is a typical wavelength for radio waves? 22. What is a typical wavelength for microwaves? 23. What is a typical wavelength for infrared waves? 24. What is a typical wavelength for visible light waves? 25. What is a typi ...
... 21. Light travels as waves, and one property of waves is their wavelength. What is a typical wavelength for radio waves? 22. What is a typical wavelength for microwaves? 23. What is a typical wavelength for infrared waves? 24. What is a typical wavelength for visible light waves? 25. What is a typi ...
Lecture 10a Neutron Star and Black Holes (Test 2 overview)
... Observing Black Holes • observe radiation from hot matter falling into black hole • observe orbit of normal star around “unseen” companion. Gives mass and if > 3xmass(Sun) then assume black hole (if smaller maybe neutron star) PHS 162 ...
... Observing Black Holes • observe radiation from hot matter falling into black hole • observe orbit of normal star around “unseen” companion. Gives mass and if > 3xmass(Sun) then assume black hole (if smaller maybe neutron star) PHS 162 ...
Paper 3 (pdf)
... The effective area estimate can be used to predict the minimum detectable polarization5 (MDP) for potential targets. Extragalactic sources such as the BL Lac object PKS 2155−304 are expected to be highly polarized in the soft X-ray band. In a 10,000 s observation of PKS 2155−304, this instrument cou ...
... The effective area estimate can be used to predict the minimum detectable polarization5 (MDP) for potential targets. Extragalactic sources such as the BL Lac object PKS 2155−304 are expected to be highly polarized in the soft X-ray band. In a 10,000 s observation of PKS 2155−304, this instrument cou ...
Powerpoint Presentation (large file)
... neutron stars produce novae and bursters • Material from an ordinary star in a close binary can fall onto the surface of the companion white dwarf or neutron star to produce a surface layer in which thermonuclear reactions can explosively ignite • Explosive hydrogen fusion may occur in the surface l ...
... neutron stars produce novae and bursters • Material from an ordinary star in a close binary can fall onto the surface of the companion white dwarf or neutron star to produce a surface layer in which thermonuclear reactions can explosively ignite • Explosive hydrogen fusion may occur in the surface l ...
STARS: how they are born, live and die
... The life and death of a low-mass star (cont.) When brand new, this degenerate star is quite hot and looks white (like Sirius B) or even blue in color, leading to the name white dwarf. The oldest “white dwarfs” in our galaxy, age about 12 billion years, have had enough time to cool down to temperatu ...
... The life and death of a low-mass star (cont.) When brand new, this degenerate star is quite hot and looks white (like Sirius B) or even blue in color, leading to the name white dwarf. The oldest “white dwarfs” in our galaxy, age about 12 billion years, have had enough time to cool down to temperatu ...
Lec10
... spacetime in such a way that time becomes infinitely long (as viewed by distant observer). The falling observer sees ordinary free fall in a finite time. ...
... spacetime in such a way that time becomes infinitely long (as viewed by distant observer). The falling observer sees ordinary free fall in a finite time. ...
HEIC0619: EMBARGOED UNTIL: 19:30 (CET)/01:30 PM EST 11
... nebula is ionised by the youngest (bluest) heavy stars in Pismis 24. The intense ultraviolet radiation from the blazing stars heats the gas surrounding the cluster and creates a bubble in NGC 6357. The team also managed to determine the mass of another massive star in Pismis 24: Pismis 24-17. Its ma ...
... nebula is ionised by the youngest (bluest) heavy stars in Pismis 24. The intense ultraviolet radiation from the blazing stars heats the gas surrounding the cluster and creates a bubble in NGC 6357. The team also managed to determine the mass of another massive star in Pismis 24: Pismis 24-17. Its ma ...
The Milky Way at Different Wavelengths
... In the Milky Way, extended soft X-ray emission is detected from hot, shocked gas. At the lower energies especially, the interstellar medium strongly absorbs X-rays, and cold clouds of interstellar gas are seen as shadows against background X-ray emission. Color variations indicate variations of abso ...
... In the Milky Way, extended soft X-ray emission is detected from hot, shocked gas. At the lower energies especially, the interstellar medium strongly absorbs X-rays, and cold clouds of interstellar gas are seen as shadows against background X-ray emission. Color variations indicate variations of abso ...
I`m using this stupid huge font
... Galaxy relaxes dynamically Black holes accrete stars, gas, and grow ...
... Galaxy relaxes dynamically Black holes accrete stars, gas, and grow ...
Black holes in binary systems and galatic nuclei
... radiopulsars or X-ray bursters of the first kind. All these properties are the evidences of the observed surface of NS. Therefore, in all 50 cases when the relativistic object shows evidences of the observed surface its mass does not exceed the value 3 M – absolute upper limit of the mass of NS pr ...
... radiopulsars or X-ray bursters of the first kind. All these properties are the evidences of the observed surface of NS. Therefore, in all 50 cases when the relativistic object shows evidences of the observed surface its mass does not exceed the value 3 M – absolute upper limit of the mass of NS pr ...
Second and Third Black Hole Lecture
... velocities of individual stars in the galactic center This allows a determination of the mass within given radii The inferred density of the central region is >1012M/pc3 ...
... velocities of individual stars in the galactic center This allows a determination of the mass within given radii The inferred density of the central region is >1012M/pc3 ...
Gravitational potential energy
... • Nuclear starbursts are actually circumnuclear and occur in many massive young clusters ...
... • Nuclear starbursts are actually circumnuclear and occur in many massive young clusters ...
Incredible Shrinking Stars
... smaller than the stellar core. The stellar core was rotating (because it was part of a rotating star). When the core collapses, the rotation is concentrated (sort of) in the neutron. Consequently, tbe neutron star ends up spinning very rapidly 4. The interior of a neutron star consists of neutrons. ...
... smaller than the stellar core. The stellar core was rotating (because it was part of a rotating star). When the core collapses, the rotation is concentrated (sort of) in the neutron. Consequently, tbe neutron star ends up spinning very rapidly 4. The interior of a neutron star consists of neutrons. ...
Stars and Their Life Cycles
... • Most massive stars become black holes when they die. • The dividing line between inside and outside a black hole is called the event horizon. • Quasars are galaxies with black holes at their center. The Milky Way Galaxy has a black hole at its center named Sagittarius A*. ...
... • Most massive stars become black holes when they die. • The dividing line between inside and outside a black hole is called the event horizon. • Quasars are galaxies with black holes at their center. The Milky Way Galaxy has a black hole at its center named Sagittarius A*. ...
Today`s Powerpoint
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
2-GW_MEPhI_2016_bisnovatyi
... Bisnovatyi-Kogan G.S. and Komberg B.V., 1974, Astron. Zh. 51,373 Reasons: 1. After 100 million years the optical star will become a white dwarf, mass transfer will be finished, and the system will be transparant to radio emission. 2. X ray pulsar is accelerating its rotation due to accretion, so aft ...
... Bisnovatyi-Kogan G.S. and Komberg B.V., 1974, Astron. Zh. 51,373 Reasons: 1. After 100 million years the optical star will become a white dwarf, mass transfer will be finished, and the system will be transparant to radio emission. 2. X ray pulsar is accelerating its rotation due to accretion, so aft ...
The Milky Way - Clive Gifford
... Just like the planets travel around the Sun, our Solar System travels around the centre of the Milky Way. It takes between 225 and 230 million years to complete an orbit. ...
... Just like the planets travel around the Sun, our Solar System travels around the centre of the Milky Way. It takes between 225 and 230 million years to complete an orbit. ...
Lecture notes 17: Active Galaxies
... dominated by non-thermal radiation and emission lines indicative of energetic processes with line widths indicating velocities of up to 10 000 km/s. Radio quiet quasars (QSO’s) are observed to associated with spiral galaxies while the radio loud quasars are found in elliptical galaxies. A large perc ...
... dominated by non-thermal radiation and emission lines indicative of energetic processes with line widths indicating velocities of up to 10 000 km/s. Radio quiet quasars (QSO’s) are observed to associated with spiral galaxies while the radio loud quasars are found in elliptical galaxies. A large perc ...
No Slide Title - Harvard-Smithsonian Center for Astrophysics
... • Cranmer (2009) modeled equatorial zones of T Tauri stars as a collection of closed loops, energized by “footpoint shaking” (via blob-impact surface turbulence). ...
... • Cranmer (2009) modeled equatorial zones of T Tauri stars as a collection of closed loops, energized by “footpoint shaking” (via blob-impact surface turbulence). ...
pasta Jos´e A. Pons , Daniele Vigan`o and Nanda Rea
... It has long been hoped that stringent constraints could be placed on the equation of state of dense matter from astrophysical measurements of neutron stars, the compact remnants of the explosion of massive stars. Up to the present time, however, despite important breakthrough discoveries [1, 2, 3] ...
... It has long been hoped that stringent constraints could be placed on the equation of state of dense matter from astrophysical measurements of neutron stars, the compact remnants of the explosion of massive stars. Up to the present time, however, despite important breakthrough discoveries [1, 2, 3] ...
Some Examples of Virtual Observatory Enabled Science What Are the Some Distinguishing
... Galaxy clusters contain galaxies, hot gas, and dark matter Can survey for each of these components using observations in different wavebands: 1. Optical • Look for an overdensity of galaxies in patches on the sky • Can use color information (clusters contain many red elliptical galaxies) • At higher ...
... Galaxy clusters contain galaxies, hot gas, and dark matter Can survey for each of these components using observations in different wavebands: 1. Optical • Look for an overdensity of galaxies in patches on the sky • Can use color information (clusters contain many red elliptical galaxies) • At higher ...
Solutions to test #2 taken on Monday
... 2. (13) Millions, Billions or One. This is an “order of magnitude” question. Pick the number (the order of magnitude) that is closest for each. a) ___one_____ Average distance (in parsecs) between stars. b) ____billions____ Current age of the Sun in years. c) ___millions_____ Length of time a star l ...
... 2. (13) Millions, Billions or One. This is an “order of magnitude” question. Pick the number (the order of magnitude) that is closest for each. a) ___one_____ Average distance (in parsecs) between stars. b) ____billions____ Current age of the Sun in years. c) ___millions_____ Length of time a star l ...
Sirius Astronomer - Orange County Astronomers
... last year and President this year. For those of you that know me, I'm not a very talkative person, especially when it comes to written correspondence. I'm usually brief and to the point. So, if this letter seems short, have a good laugh because it’s probably twice as long as my usual letters. OCA is ...
... last year and President this year. For those of you that know me, I'm not a very talkative person, especially when it comes to written correspondence. I'm usually brief and to the point. So, if this letter seems short, have a good laugh because it’s probably twice as long as my usual letters. OCA 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.