Alpha Centauri
... FAMOUS FOR: It’s the 3rd brightest star in the sky. And a member of the triple star system. ...
... FAMOUS FOR: It’s the 3rd brightest star in the sky. And a member of the triple star system. ...
Solutions to exercises
... (a) The most favourable contrast ratio occurs when the vertical distance between Jupiter’s curve and the Sun’s is minimized. The two curves are converging as they disappear off the right-hand side of the figure, so the most favourable contrast ratio occurs for wavelengths around (or greater than) 100 ...
... (a) The most favourable contrast ratio occurs when the vertical distance between Jupiter’s curve and the Sun’s is minimized. The two curves are converging as they disappear off the right-hand side of the figure, so the most favourable contrast ratio occurs for wavelengths around (or greater than) 100 ...
http://www.highpoint.edu/~afuller/PHY-1050
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements (some helium fuses to carbon to make oxygen). • All that remains is the exposed core of the star, called a white dwarf. • Degeneracy pressure supports the white dwarf ...
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements (some helium fuses to carbon to make oxygen). • All that remains is the exposed core of the star, called a white dwarf. • Degeneracy pressure supports the white dwarf ...
Statistical analysis of stellar evolution
... separate out groups of stars powered by different physical processes and at different stages of their lives. These groups include the main sequence, so named for its dominant position in a CMD, the evolved red giants, and the even older white dwarfs. Today the physical processes that govern stellar ...
... separate out groups of stars powered by different physical processes and at different stages of their lives. These groups include the main sequence, so named for its dominant position in a CMD, the evolved red giants, and the even older white dwarfs. Today the physical processes that govern stellar ...
cohen_paris_v2_may2009 - Astronomy at Swarthmore College
... Simulation/visualization courtesy R. Townsend Movie available at astro.swarthmore.edu/~cohen/presentations/apip09/rrm-o25-i75-b60-redt.avi ...
... Simulation/visualization courtesy R. Townsend Movie available at astro.swarthmore.edu/~cohen/presentations/apip09/rrm-o25-i75-b60-redt.avi ...
Chapter 17
... begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. When looking at just a few atoms, the gravitational force is nowhere near strong enough to overcome the random thermal motion. Even a massive cloud of ...
... begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. When looking at just a few atoms, the gravitational force is nowhere near strong enough to overcome the random thermal motion. Even a massive cloud of ...
Summary Of the Structure of the Milky Way
... nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allow astronomers to know the direction to the center of our gala ...
... nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allow astronomers to know the direction to the center of our gala ...
ch19
... • X rays are observed from hot gas above and below the Milky Way's disk. © 2014 Pearson Education, Inc. ...
... • X rays are observed from hot gas above and below the Milky Way's disk. © 2014 Pearson Education, Inc. ...
Condensates in Neutron Star Interiors
... later, in 1731, John Bevis discovered the supernova remnant, which was later christened the Crab nebula (or M1, the first entry in the Messier catalogue). Finally, in 1968, a radio wave source was discovered in the nebula which pulsates with a period of 33 ms. The source was characterized as a compa ...
... later, in 1731, John Bevis discovered the supernova remnant, which was later christened the Crab nebula (or M1, the first entry in the Messier catalogue). Finally, in 1968, a radio wave source was discovered in the nebula which pulsates with a period of 33 ms. The source was characterized as a compa ...
A brief review of double-pulsar system PSR J0737-3039
... Evolution of the double-pulsar system Consider a binary evolution scenario of two massive MS stars. After a first mass transfer stage, the primary (more massive star) form a NS in a core-collapse supernova (Type II) explosion. Under favorable conditions (small kick), the NS remains bound. As th ...
... Evolution of the double-pulsar system Consider a binary evolution scenario of two massive MS stars. After a first mass transfer stage, the primary (more massive star) form a NS in a core-collapse supernova (Type II) explosion. Under favorable conditions (small kick), the NS remains bound. As th ...
Abundances of RGB stars in NGC 6752 Grundahl
... star scatter in the [Ca/Fe] and [Ni/Fe] ratios is 0.025 dex. These observations can be interpreted as follows: The fact that Li disappears above the RGB bump (as also found for PopII field stars by Gratton et al. 2000) implies that the “physics” of cluster and field stars may be very similar, in the ...
... star scatter in the [Ca/Fe] and [Ni/Fe] ratios is 0.025 dex. These observations can be interpreted as follows: The fact that Li disappears above the RGB bump (as also found for PopII field stars by Gratton et al. 2000) implies that the “physics” of cluster and field stars may be very similar, in the ...
Project 8 : Stellar Spectra: Classification
... Absorption lines occur when an electron absorbs energy from the spectrum to move up the energy levels in the atom. Since hydrogen has only one electron, this electron is usually in the ground state. But as the temperature rises, the average electron gains m ...
... Absorption lines occur when an electron absorbs energy from the spectrum to move up the energy levels in the atom. Since hydrogen has only one electron, this electron is usually in the ground state. But as the temperature rises, the average electron gains m ...
a changing cosmos - Whittier Union High School District
... and not really able to affect things around us much. But there are some types of events in our changing cosmos that could really mess things up badly for us. In fossil records, there are many instances of species going extinct—apparently unable to cope with some change in environment. At certain tim ...
... and not really able to affect things around us much. But there are some types of events in our changing cosmos that could really mess things up badly for us. In fossil records, there are many instances of species going extinct—apparently unable to cope with some change in environment. At certain tim ...
PDF only - at www.arxiv.org.
... DO Aql into the prototype of my 'F class' slow novae (Schaefer 2013; Strope, Schaefer, & Henden 2010; Pagnotta & Schaefer 2014). From this work, we know with very high confidence that DO Aql is a slow nova with a low-mass white dwarf that recurs only with a very long cycle of longer than a million y ...
... DO Aql into the prototype of my 'F class' slow novae (Schaefer 2013; Strope, Schaefer, & Henden 2010; Pagnotta & Schaefer 2014). From this work, we know with very high confidence that DO Aql is a slow nova with a low-mass white dwarf that recurs only with a very long cycle of longer than a million y ...
USRA - MSU Solar Physics
... Gamma ray bursts (GRBs) are the most energetic phenomena in the universe with the ability to outshine an entire galaxy one-thousand fold! As indicators of the deaths of the most massive stars, they provide insight into the creation of blackholes from stellar progenitors. This exciting field, however ...
... Gamma ray bursts (GRBs) are the most energetic phenomena in the universe with the ability to outshine an entire galaxy one-thousand fold! As indicators of the deaths of the most massive stars, they provide insight into the creation of blackholes from stellar progenitors. This exciting field, however ...
in search of antimatter in the universe
... But this is the brightness we would expect if the jet hits the ‘average star’. If we instead consider a much larger object, such as the gas shell of a supernova, then we obtain Figure 12. In this case, the emission line is just visible up to 600 parsecs, after which the brightness drops below 0.1 ph ...
... But this is the brightness we would expect if the jet hits the ‘average star’. If we instead consider a much larger object, such as the gas shell of a supernova, then we obtain Figure 12. In this case, the emission line is just visible up to 600 parsecs, after which the brightness drops below 0.1 ph ...
Eris is Pluto`s Twin This diagram shows the path of a faint star during
... telescopes. All three telescopes recorded a sudden drop in brightness as Eris blocked the light of the distant star. The combined observations from the two Chilean sites indicate that Eris is close to spherical. These measurements should accurately measure its shape and size as long as they are not ...
... telescopes. All three telescopes recorded a sudden drop in brightness as Eris blocked the light of the distant star. The combined observations from the two Chilean sites indicate that Eris is close to spherical. These measurements should accurately measure its shape and size as long as they are not ...
Brown et al. 2008 Studying Resolved Stellar
... boxes superimposed have been drawn to sample specific age ranges. The total magnitudes of this population are M_J ≈-17, M_K ≈-18. The simulation has been computed with the code ZVAR by G. Bertelli (priv. Comm.) ...
... boxes superimposed have been drawn to sample specific age ranges. The total magnitudes of this population are M_J ≈-17, M_K ≈-18. The simulation has been computed with the code ZVAR by G. Bertelli (priv. Comm.) ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.