Focus Week: Messengers of Supernova Explosions
... Texas A&M, Keiichi Maeda/IPMU). Recent developments in observational methods have led to the discovery of new types of supernovae, which are either extremely bright or faint (Peter ...
... Texas A&M, Keiichi Maeda/IPMU). Recent developments in observational methods have led to the discovery of new types of supernovae, which are either extremely bright or faint (Peter ...
Slide 1
... Denis A. Leahy, Sharon M. Morsink and Yi Chou The accreting millisecond pulsar XTE J1807-294 is studied through a pulse-shape modeling analysis. The model includes blackbody and Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing ...
... Denis A. Leahy, Sharon M. Morsink and Yi Chou The accreting millisecond pulsar XTE J1807-294 is studied through a pulse-shape modeling analysis. The model includes blackbody and Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing ...
powerpoint
... • Why is the sky dark at night? • If the universe were infinite and the density of galaxies was the same everywhere in the universe, then there should be a star in every single direction: the sky should be bright at night, but it is not. ...
... • Why is the sky dark at night? • If the universe were infinite and the density of galaxies was the same everywhere in the universe, then there should be a star in every single direction: the sky should be bright at night, but it is not. ...
Student Literacy
... Ancient Arabs, Egyptians, Babylonians and Greeks were well aware of the different stars. Many varied interpretations were written and reported by those different populations. They had observed that some stars could be connected like a dot-to-dot picture. Depending on what they thought the picture l ...
... Ancient Arabs, Egyptians, Babylonians and Greeks were well aware of the different stars. Many varied interpretations were written and reported by those different populations. They had observed that some stars could be connected like a dot-to-dot picture. Depending on what they thought the picture l ...
Solar System where_are_we
... has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). To represent this, the beautiful spiral galaxy Messier 74 was used, as it thought to be a similar galaxy to ours. ...
... has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). To represent this, the beautiful spiral galaxy Messier 74 was used, as it thought to be a similar galaxy to ours. ...
ASTR 220 Homework #7 Solutions
... calculated in part c is the period of the light waves. The period of 1.337301 s is the period of rotation of the pulsar. This is the how often the “beam” of the pulsar’s magnetic field is pointed toward the Earth. (e) If you had extremely sensitive hearing, would you be able to hear the pulses from ...
... calculated in part c is the period of the light waves. The period of 1.337301 s is the period of rotation of the pulsar. This is the how often the “beam” of the pulsar’s magnetic field is pointed toward the Earth. (e) If you had extremely sensitive hearing, would you be able to hear the pulses from ...
Research Powerpoint - University of Maryland: Department of
... Jets. Besides, he works on neutron telescope (LEND) flying on board of the NASA lunar mission (LRO). He is shown when testing the LEND instrument. ...
... Jets. Besides, he works on neutron telescope (LEND) flying on board of the NASA lunar mission (LRO). He is shown when testing the LEND instrument. ...
Earth Science, 10th edition Chapter 23: Beyond Our Solar System I
... 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravity lets no light escape 3. As matter is pulled into it a. Becomes very hot b. Emits x-rays ...
... 6. First one discovered in early 1970s a. Pulsar (pulsating radio source) b. Found in the Crab nebula (remnant of an A.D. 1054 supernova) C. Black hole 1. More dense than a neutron star 2. Intense surface gravity lets no light escape 3. As matter is pulled into it a. Becomes very hot b. Emits x-rays ...
Chapter 18 Notes - Valdosta State University
... of matter called plasma. Complete atoms do not exist, only a mixture of high speed nuclei and electrons that move about independently as particles do in a gas. The density of this plasma is 1.4 times that of water, so it is not like any gas we are familiar with on the Earth. ...
... of matter called plasma. Complete atoms do not exist, only a mixture of high speed nuclei and electrons that move about independently as particles do in a gas. The density of this plasma is 1.4 times that of water, so it is not like any gas we are familiar with on the Earth. ...
The Ultraluminous X-ray Source in Holmberg IX and its Environment
... due to collisional excitation by shocks, rather than by photoionization. We identify the optical counterpart to be a 22.8 mag blue star (MV = −5.0) belonging to a small stellar cluster. From isochrone fitting of our multi-colour photometry we determine a cluster age of some 60 Myr. We also discovered ...
... due to collisional excitation by shocks, rather than by photoionization. We identify the optical counterpart to be a 22.8 mag blue star (MV = −5.0) belonging to a small stellar cluster. From isochrone fitting of our multi-colour photometry we determine a cluster age of some 60 Myr. We also discovered ...
Answers for the HST Scavenger Hunt
... Give a definition of these kinds of stars. Hot, dense remains of a low-mass star like our Sun that has exhausted its sources of fuel for thermonuclear fusion. What is a Wolf-Rayet Star? Massive stars, which are usually are surrounded by outflowing gas clouds. How is this star type different from whi ...
... Give a definition of these kinds of stars. Hot, dense remains of a low-mass star like our Sun that has exhausted its sources of fuel for thermonuclear fusion. What is a Wolf-Rayet Star? Massive stars, which are usually are surrounded by outflowing gas clouds. How is this star type different from whi ...
Sample pages 2 PDF
... telescope have been observed every few hundred years by humans and were recorded as long ago as 1054 by Chinese astronomers. Many more supernovae are observed, in our own and other galaxies, with telescopes. (There are two types of supernovae. This is a description of type II supernovae. Type I supe ...
... telescope have been observed every few hundred years by humans and were recorded as long ago as 1054 by Chinese astronomers. Many more supernovae are observed, in our own and other galaxies, with telescopes. (There are two types of supernovae. This is a description of type II supernovae. Type I supe ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
... Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
Getting to Know: Structure of the Universe
... A solar system is a star and the objects that orbit that star. Scientists have found several solar systems in our galaxy, many of which have planets surrounding them. If the Milky Way galaxy were the size of a quarter, the Sun would be the size of a single speck of dust on that quarter. The Sun and ...
... A solar system is a star and the objects that orbit that star. Scientists have found several solar systems in our galaxy, many of which have planets surrounding them. If the Milky Way galaxy were the size of a quarter, the Sun would be the size of a single speck of dust on that quarter. The Sun and ...
Astronomy news
... The accurate parallactic distance (500 Lyrs) of RX J1856 which was supplied by HST has allowed astronomers to use the brightness to estimate its radius. The estimated radius came out to be smaller than 10 km and this was taken as possible evidence that RX J1856 was an exotic object, known as a quark ...
... The accurate parallactic distance (500 Lyrs) of RX J1856 which was supplied by HST has allowed astronomers to use the brightness to estimate its radius. The estimated radius came out to be smaller than 10 km and this was taken as possible evidence that RX J1856 was an exotic object, known as a quark ...
14-1 Reading Questions: Neutron Stars
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
Chapter 14 Neutron Stars and Black holes
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
Chapter 14
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
... 19. Some X-ray novae emit bursts of energy and others do not. In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bur ...
ASTR 105 Intro Astronomy: The Solar System
... even light takes a lot of time to travel between the stars • This means that what we SEE in the distant universe is light that has traveled a long time. • Our image of the universe is a delayed image. In looking out into space, we are looking back in time! – The farther away we look in distance, ...
... even light takes a lot of time to travel between the stars • This means that what we SEE in the distant universe is light that has traveled a long time. • Our image of the universe is a delayed image. In looking out into space, we are looking back in time! – The farther away we look in distance, ...
MICROQUASARS - Osservatorio Astronomico di Roma-INAF
... LOW-POWER BHs OF ALL MASSES Radio-X-ray correlation in low-hard state mQSOs (Corbel et al. 02; Gallo, Fender & Pooley, 03; Maccarone et al.03) The power output of quiescent BHs is jet-dominated In high-soft X-ray state the radio jets are quenched. Also in AGN. ...
... LOW-POWER BHs OF ALL MASSES Radio-X-ray correlation in low-hard state mQSOs (Corbel et al. 02; Gallo, Fender & Pooley, 03; Maccarone et al.03) The power output of quiescent BHs is jet-dominated In high-soft X-ray state the radio jets are quenched. Also in AGN. ...
Galaxy Zoo: Pre and post‐workshop information
... Anisotropy Probe (WMAP) has been measuring temperature fluctuations as small as 0.0002 K in the left‐over radiation from the Big Bang (called the cosmic microwave background, CMB) since 2001. This is radiation that has cooled and expanded with space thus entering the microwave (long wavelength) regio ...
... Anisotropy Probe (WMAP) has been measuring temperature fluctuations as small as 0.0002 K in the left‐over radiation from the Big Bang (called the cosmic microwave background, CMB) since 2001. This is radiation that has cooled and expanded with space thus entering the microwave (long wavelength) regio ...
Stars
... magnetic field will radiate energy at radio wavelengths, but most of this radiation comes out along the poles of the pulsar. The radio emissions are like a searchlight and we only detect them when the searchlight passes over the Earth. There must be many more pulsars than we observe, since most of t ...
... magnetic field will radiate energy at radio wavelengths, but most of this radiation comes out along the poles of the pulsar. The radio emissions are like a searchlight and we only detect them when the searchlight passes over the Earth. There must be many more pulsars than we observe, since most of t ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.