Lectures 14 & 15 powerpoint (neutron stars & black holes)
... the companion star, forming an accretion disk. Heats up to a few million K. => Strong X-ray source! ...
... the companion star, forming an accretion disk. Heats up to a few million K. => Strong X-ray source! ...
Supernovae Gamma-Ray Bursts and and some of their uses
... as the optical depth changes with the expansion ...
... as the optical depth changes with the expansion ...
File
... • Hydrogen and most of the helium in the universe are primordial, that is they date from the earliest times. • All other elements in the universe are a result of stellar nucleosynthesis: they were formed by nuclear fusion in the heart of stars. (also by processes occurring in supernovae) ...
... • Hydrogen and most of the helium in the universe are primordial, that is they date from the earliest times. • All other elements in the universe are a result of stellar nucleosynthesis: they were formed by nuclear fusion in the heart of stars. (also by processes occurring in supernovae) ...
Hypervelocity Globular: A beacon of merging clusters Oleg Gnedin with Alexey Vikhlinin
... While measuring radial velocities of globular clusters around M87 in Virgo Cluster, Caldwell et al. (2014) found an outlier… A triple interaction with a binary black hole (slingshot) can lead to a very high ejection velocity. ...
... While measuring radial velocities of globular clusters around M87 in Virgo Cluster, Caldwell et al. (2014) found an outlier… A triple interaction with a binary black hole (slingshot) can lead to a very high ejection velocity. ...
CHAPTER 13 Neutron Stars and Black Holes Clickers
... Question 9 The equivalence between an accelerating windowless elevator in space and a stationary elevator in a gravity field is a prediction of Newton’s theory of gravity. explains why elevators don’t work in space. explains why E = mc2 is true. helps explain Einstein’s theory of gravity. e) All of ...
... Question 9 The equivalence between an accelerating windowless elevator in space and a stationary elevator in a gravity field is a prediction of Newton’s theory of gravity. explains why elevators don’t work in space. explains why E = mc2 is true. helps explain Einstein’s theory of gravity. e) All of ...
Sun and Other Stars Notes
... -When all H is gone a star gets brighter and over 100 million years grows to a red giant and moves to the cooler position on the HR Diagram -The Sun grows to 8 times the mass of the Sun- (considered a high mass star) -What happens when the core becomes all Helium? -The Helium shell flashes causes it ...
... -When all H is gone a star gets brighter and over 100 million years grows to a red giant and moves to the cooler position on the HR Diagram -The Sun grows to 8 times the mass of the Sun- (considered a high mass star) -What happens when the core becomes all Helium? -The Helium shell flashes causes it ...
PPTX
... During the day, the Sun moves from east to west across the sky. In which direction do the stars move after the Sun has set? (A) The stars are stationary; they don't move (B) West (C) East ...
... During the day, the Sun moves from east to west across the sky. In which direction do the stars move after the Sun has set? (A) The stars are stationary; they don't move (B) West (C) East ...
here - ESA Science
... time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended cold periods on Earth. Perhaps the densely-filled star and gas environment of the spiral arms have an eff ...
... time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended cold periods on Earth. Perhaps the densely-filled star and gas environment of the spiral arms have an eff ...
Document
... • Whether or not LMXBs form in the field (outside of globulars) is an open question – Keeping a binary bound after SN is a problem, ...
... • Whether or not LMXBs form in the field (outside of globulars) is an open question – Keeping a binary bound after SN is a problem, ...
Astro 3 Spring, 2004 (Prof
... The mass of a star determines its lifetime. High mass stars live short lives, while low mass stars live a long time. This is due to the fact that high mass stars burn their hydrogen much more quickly and efficiently than low mass stars. Some characteristic lifetimes are as follows: -- O Stars live ~ ...
... The mass of a star determines its lifetime. High mass stars live short lives, while low mass stars live a long time. This is due to the fact that high mass stars burn their hydrogen much more quickly and efficiently than low mass stars. Some characteristic lifetimes are as follows: -- O Stars live ~ ...
Astronomers Find Extremely Large Planet
... these disks extend many times farther than this local comparison suggests that planets, too, could extend well beyond the relatively close proximity observed in our solar system and others. “That would be good news for astronomers, because planets are notoriously difficult to detect near stars, whic ...
... these disks extend many times farther than this local comparison suggests that planets, too, could extend well beyond the relatively close proximity observed in our solar system and others. “That would be good news for astronomers, because planets are notoriously difficult to detect near stars, whic ...
newsletter - Thanet Astronomy Group
... of Cygnus and some of the brighter stars that make this constellation easy to to find. We also looked at many of the other interesting objects that can be found in Cygnus. The presentation was very well received with many members commenting on how useful it was. The next constellation we will tackle ...
... of Cygnus and some of the brighter stars that make this constellation easy to to find. We also looked at many of the other interesting objects that can be found in Cygnus. The presentation was very well received with many members commenting on how useful it was. The next constellation we will tackle ...
The Abundances of the Fe Group Elements in Three Early B Stars in
... The abundances of C and N are good indicators of the chemical evolution in a galaxy. The FUSE spectral region contains several lines of carbon and nitrogen, including resonance lines of C III and N III. The latter are not good for analysis as they are blended with the ISM features. In Fig. 4 we show ...
... The abundances of C and N are good indicators of the chemical evolution in a galaxy. The FUSE spectral region contains several lines of carbon and nitrogen, including resonance lines of C III and N III. The latter are not good for analysis as they are blended with the ISM features. In Fig. 4 we show ...
Stars in the night Sky - ScienceEducationatNewPaltz
... constellation may be visible in the early evening sky for two or three months after the date of its midnight culmination. After the date of its midnight culmination it will transit the meridian at an ever earlier time each evening, until eventually it will already be in the western sky when it fir ...
... constellation may be visible in the early evening sky for two or three months after the date of its midnight culmination. After the date of its midnight culmination it will transit the meridian at an ever earlier time each evening, until eventually it will already be in the western sky when it fir ...
1. Introduction
... In parallel with these developments, it has come to be realized that some, and probably very many, stars pulsate in more complicated manners than the Cepheids. In many instances more than one mode of oscillation is excited simultaneously in a star; these modes may include both radial overtones, in a ...
... In parallel with these developments, it has come to be realized that some, and probably very many, stars pulsate in more complicated manners than the Cepheids. In many instances more than one mode of oscillation is excited simultaneously in a star; these modes may include both radial overtones, in a ...
Stars, Galaxies, and the Universe Section 1 Distances to Stars
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.