The Circumstellar Medium of Massive Stars in Motion
... either by dynamical interactions with other stars inside the cluster, or by the disruption of a binary system when one of its components explodes. These stars, known as runaways or exiles, move through the ISM supersonically and this modifies the otherwise spherical CSM to a roughly axisymmetric sol ...
... either by dynamical interactions with other stars inside the cluster, or by the disruption of a binary system when one of its components explodes. These stars, known as runaways or exiles, move through the ISM supersonically and this modifies the otherwise spherical CSM to a roughly axisymmetric sol ...
NASA FUSE Satellite Solves the Case of the Missing Deuterium
... unobservable solid form. The new FUSE data strongly support this theory. In regions that remain undisturbed for long periods, deuterium atoms systematically leave the gas phase and replace normal hydrogen atoms in dust grains. FUSE cannot detect this non-gaseous form, which explains the low detectio ...
... unobservable solid form. The new FUSE data strongly support this theory. In regions that remain undisturbed for long periods, deuterium atoms systematically leave the gas phase and replace normal hydrogen atoms in dust grains. FUSE cannot detect this non-gaseous form, which explains the low detectio ...
12 Stellar Evolution
... to a very different fate. Its path across the H–R diagram is essentially a straight line – it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
... to a very different fate. Its path across the H–R diagram is essentially a straight line – it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
The Milky Way Model - University of Chicago
... entire universe or was it just one of many “island universes” located within a much greater system? Eventually a famous astronomer, Edwin Hubble was able to use a powerful telescope to resolve the stars in these spiral nebulae - ending the debate - and measure the great distances to them using Cephe ...
... entire universe or was it just one of many “island universes” located within a much greater system? Eventually a famous astronomer, Edwin Hubble was able to use a powerful telescope to resolve the stars in these spiral nebulae - ending the debate - and measure the great distances to them using Cephe ...
in search of antimatter in the universe
... as they are estimated to have a radius of 0.5-2.5 pc.8 On calculating the number of stars in the Centaurus A jet, the number of planetary nebulae and supernovae should be about 15, comparable to the number of knots in the jet. As we have also found that objects with radii close to 2.5 pc may be brig ...
... as they are estimated to have a radius of 0.5-2.5 pc.8 On calculating the number of stars in the Centaurus A jet, the number of planetary nebulae and supernovae should be about 15, comparable to the number of knots in the jet. As we have also found that objects with radii close to 2.5 pc may be brig ...
presentation (PPT format)
... A century ago the astronomers thought that the entire universe was only thousand light-year and nothing was beyond the Milky Way Galaxy! M31: Andromeda and its satellites Look at : “The Local Group of Galaxies” ...
... A century ago the astronomers thought that the entire universe was only thousand light-year and nothing was beyond the Milky Way Galaxy! M31: Andromeda and its satellites Look at : “The Local Group of Galaxies” ...
Galaxies Galaxies M81
... This image shows the spiral galaxy NGC 4319 and the quasar Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness o ...
... This image shows the spiral galaxy NGC 4319 and the quasar Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness o ...
Type Ia Supernovae
... Ic have been attributed to these events. This thesis, however is dedicated to the second group of supernovae, the thermonuclear explosions of degenerate carbon and oxygen rich material and lacking hydrogen - called Type Ia supernovae (SNe Ia). White dwarf stars are formed at the end of a typical sta ...
... Ic have been attributed to these events. This thesis, however is dedicated to the second group of supernovae, the thermonuclear explosions of degenerate carbon and oxygen rich material and lacking hydrogen - called Type Ia supernovae (SNe Ia). White dwarf stars are formed at the end of a typical sta ...
File
... • can be classified by morphology (shapes and sizes) Three Main Types of Galaxies: • Ellipticals - galaxies are pure bulge, no disk component ...
... • can be classified by morphology (shapes and sizes) Three Main Types of Galaxies: • Ellipticals - galaxies are pure bulge, no disk component ...
White dwarf binary
... Low-mass stars with < 2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as carbon white dwarfs Very low-mass stars with < 0.5MSun never become hot enough to fuse helium nuclei, and end as helium white ...
... Low-mass stars with < 2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as carbon white dwarfs Very low-mass stars with < 0.5MSun never become hot enough to fuse helium nuclei, and end as helium white ...
Standing in Awe - Auckland Astronomical Society
... rather poorly condensed globular cluster NGC 5897. The stars are faint though easily resolved with smaller telescopes. Current studies allocate a distance of 44,800 light years from the Earth. ...
... rather poorly condensed globular cluster NGC 5897. The stars are faint though easily resolved with smaller telescopes. Current studies allocate a distance of 44,800 light years from the Earth. ...
aaswinter07ppt
... photosphere, and below the dust condensation radius. The flux density of the masers in these late-type stars typically have the same period as the optical or infrared pulsation period. In V838 Mon we have seen a steady rise in the flux density of the masers after their first detection to the present ...
... photosphere, and below the dust condensation radius. The flux density of the masers in these late-type stars typically have the same period as the optical or infrared pulsation period. In V838 Mon we have seen a steady rise in the flux density of the masers after their first detection to the present ...
DTU_9e_ch15
... galactic disk at visual wavelengths. However, hydrogen clouds can be detected beyond this dust by the 21-cm radio waves emitted by changes in the relative spins of electrons and protons in the clouds, as well as by other nonvisible emissions. ...
... galactic disk at visual wavelengths. However, hydrogen clouds can be detected beyond this dust by the 21-cm radio waves emitted by changes in the relative spins of electrons and protons in the clouds, as well as by other nonvisible emissions. ...
Drawing Constellations
... tied to a rock along the coastline, dressed only in her jewelry. The monster would be along in due time to take his prize. – At that moment Perseus came flying by. He had just killed the Gorgon Medusa and was carrying the severed head back to Athene. To make a long story short, he saved her then tur ...
... tied to a rock along the coastline, dressed only in her jewelry. The monster would be along in due time to take his prize. – At that moment Perseus came flying by. He had just killed the Gorgon Medusa and was carrying the severed head back to Athene. To make a long story short, he saved her then tur ...
opportunities nuclear astrophysics
... Our understanding of these processes has developed greatly in the last 75 years. It was known early on that nuclear reactions must provide the energy for the sun. No other processes, chemical or gravitational, could yield the sun’s luminosity over its 4.6 billion-year life. More direct evidence for ...
... Our understanding of these processes has developed greatly in the last 75 years. It was known early on that nuclear reactions must provide the energy for the sun. No other processes, chemical or gravitational, could yield the sun’s luminosity over its 4.6 billion-year life. More direct evidence for ...
Institute for Structure and Nuclear Astrophysics
... Our understanding of these processes has developed greatly in the last 75 years. It was known early on that nuclear reactions must provide the energy for the sun. No other processes, chemical or gravitational, could yield the sun’s luminosity over its 4.6 billion-year life. More direct evidence for ...
... Our understanding of these processes has developed greatly in the last 75 years. It was known early on that nuclear reactions must provide the energy for the sun. No other processes, chemical or gravitational, could yield the sun’s luminosity over its 4.6 billion-year life. More direct evidence for ...
Downloadable Full Text
... The UFD Reticulum II (Ret II) was recently discovered with Dark Energy Survey data12,13 and confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abunda ...
... The UFD Reticulum II (Ret II) was recently discovered with Dark Energy Survey data12,13 and confirmed to be one of the most metal-poor galaxies known14. On 1-4 Oct 2015, we obtained high-resolution spectra of the nine brightest member stars in Ret II (see Table 1, Extended Data Figure 1). The abunda ...
What is the minimum size of a star that will go supernova? A. Half
... Two forces battle for dominance within a star, gravity and radiation pressure. When the forces balance, the star is stable. If gravity is pulling inward towards the center, in what direction is radiation pressure acting? Answer: Pushing away from center Without radiation pressure, the gr ...
... Two forces battle for dominance within a star, gravity and radiation pressure. When the forces balance, the star is stable. If gravity is pulling inward towards the center, in what direction is radiation pressure acting? Answer: Pushing away from center Without radiation pressure, the gr ...
Draco: The Dragon - Courtney Stookey
... The Constellation and Stars The Draco constellation is found in the northern hemisphere. Originally, it was charted by Ptolemy in the 2nd century. The constellation is found in an area that is 1083 square degrees. “It can be seen at latitudes between +90° and -15° and is best visible at 9 p.m. durin ...
... The Constellation and Stars The Draco constellation is found in the northern hemisphere. Originally, it was charted by Ptolemy in the 2nd century. The constellation is found in an area that is 1083 square degrees. “It can be seen at latitudes between +90° and -15° and is best visible at 9 p.m. durin ...
E3 – Stellar distances
... Cepheid variables • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a li ...
... Cepheid variables • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a li ...
M104: The Sombrero Galaxy
... The Sombrero resides about 30 million light-years away at the southern edge of the dense Virgo cluster of galaxies. The galaxy is so far away that the light we are seeing today began its journey toward Earth 30 million years ago, about the time our earliest known ape-like ancestors appeared on our p ...
... The Sombrero resides about 30 million light-years away at the southern edge of the dense Virgo cluster of galaxies. The galaxy is so far away that the light we are seeing today began its journey toward Earth 30 million years ago, about the time our earliest known ape-like ancestors appeared on our p ...
![Module 4.1 - The Scale of the Universe [slide 1] We now turn to](http://s1.studyres.com/store/data/002846843_1-9e0ec9d1a2abbbab3c0d406694bfc4e2-300x300.png)
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... observable from photometry. So are the fluxes. And the only remaining question is, can we find out the radius? We can, in a way, because if we integrate motion of the photosphere as traced by the radial velocity, we can find out how much the radius has been changing. So we have 3 equations in 3 unkn ...
... observable from photometry. So are the fluxes. And the only remaining question is, can we find out the radius? We can, in a way, because if we integrate motion of the photosphere as traced by the radial velocity, we can find out how much the radius has been changing. So we have 3 equations in 3 unkn ...
M104: The Sombrero Galaxy
... The Sombrero resides about 30 million light-years away at the southern edge of the dense Virgo cluster of galaxies. The galaxy is so far away that the light we are seeing today began its journey toward Earth 30 million years ago, about the time our earliest known ape-like ancestors appeared on our p ...
... The Sombrero resides about 30 million light-years away at the southern edge of the dense Virgo cluster of galaxies. The galaxy is so far away that the light we are seeing today began its journey toward Earth 30 million years ago, about the time our earliest known ape-like ancestors appeared on our p ...
History of supernova observation
The known history of supernova observation goes back to 185 CE, when, supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind. Several additional supernovae within the Milky Way galaxy have been recorded since that time, with SN 1604 being the most recent supernova to be observed in this galaxy.Since the development of the telescope, the field of supernova discovery has expanded to other galaxies. These occurrences provide important information on the distances of galaxies. Successful models of supernova behavior have also been developed, and the role of supernovae in the star formation process is now increasingly understood.