Planet Hunters: The First Two Planet Candidates Identified by the
... that six of the ten were unlikely to be planet candidates. KIC 11904734 has a V-shaped transit and very large radius, suggesting an eclipsing binary star system. KIC 8043052 and KIC 12009347 have secondary occultations that are also consistent with eclipsing binary systems. KIC 4913000 and KIC 90978 ...
... that six of the ten were unlikely to be planet candidates. KIC 11904734 has a V-shaped transit and very large radius, suggesting an eclipsing binary star system. KIC 8043052 and KIC 12009347 have secondary occultations that are also consistent with eclipsing binary systems. KIC 4913000 and KIC 90978 ...
1. Chapter 10
... a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life on your island’s shores and to notice patterns in the objects in the ni ...
... a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life on your island’s shores and to notice patterns in the objects in the ni ...
Nucleosynthesis and the death of stars
... 4 H He + energy + neutrinos Mass of 4 H > Mass of 1 He •In every second, 600 million tons of hydrogen converts into helium to power the Sun •At this rate, the Sun can continue hydrogen fusion for more than 6 billion years. ...
... 4 H He + energy + neutrinos Mass of 4 H > Mass of 1 He •In every second, 600 million tons of hydrogen converts into helium to power the Sun •At this rate, the Sun can continue hydrogen fusion for more than 6 billion years. ...
sections 7-8 instructor notes
... The primary opacity source in the atmospheres of B and A-type stars is atomic hydrogen, which makes its presence obvious in the flux distributions of such stars with discrete discontinuities in the stellar continua at λ912Å (the Lyman discontinuity), λ3647Å (the Balmer discontinuity), and λ8206Å (t ...
... The primary opacity source in the atmospheres of B and A-type stars is atomic hydrogen, which makes its presence obvious in the flux distributions of such stars with discrete discontinuities in the stellar continua at λ912Å (the Lyman discontinuity), λ3647Å (the Balmer discontinuity), and λ8206Å (t ...
GG_CERN_0707
... Main Focus: Dwarf Spheroidals Low luminosity, low surface-brightness satellite galaxies, ‘classical’ L ~ 106L, V ~ 24 mag/sq Extremely gas-poor Apparently dark-matter dominated ~ 10km/s, 10 < ~ M/L <~ 100 Metal-poor, mean stellar metallicity < ~ –1.5 dex All contain old stars; extended ...
... Main Focus: Dwarf Spheroidals Low luminosity, low surface-brightness satellite galaxies, ‘classical’ L ~ 106L, V ~ 24 mag/sq Extremely gas-poor Apparently dark-matter dominated ~ 10km/s, 10 < ~ M/L <~ 100 Metal-poor, mean stellar metallicity < ~ –1.5 dex All contain old stars; extended ...
astrocoursespring2012lec4
... not only the universe today, but also the universe in the past. Using modern telescopes and computers, astronomers have studied numerous properties of globular clusters. Here are just some of the quantities that we can measure for globular clusters: •size (radius), •mass, •distance from galactic cen ...
... not only the universe today, but also the universe in the past. Using modern telescopes and computers, astronomers have studied numerous properties of globular clusters. Here are just some of the quantities that we can measure for globular clusters: •size (radius), •mass, •distance from galactic cen ...
NASA`s Spitzer Images Out-of-This
... "The fate of this black hole and others like it is an active area of research," said George Helou, deputy director of NASA's Spitzer Science Center at the California Institute of Technology in Pasadena. "Some theories hold that the black hole might quiet down and eventually enter a more dormant stat ...
... "The fate of this black hole and others like it is an active area of research," said George Helou, deputy director of NASA's Spitzer Science Center at the California Institute of Technology in Pasadena. "Some theories hold that the black hole might quiet down and eventually enter a more dormant stat ...
absolute brightness: The apparent brightness a star would have if it
... collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxies that exhibit rapidly variable emission from the radio through gamma-ray band. The radiation is predominantly from jets moving near the speed of light. Blazars are thought to be radio galaxies w ...
... collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxies that exhibit rapidly variable emission from the radio through gamma-ray band. The radiation is predominantly from jets moving near the speed of light. Blazars are thought to be radio galaxies w ...
absolute brightness: The apparent brightness a star would have if it
... collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxies that exhibit rapidly variable emission from the radio through gamma-ray band. The radiation is predominantly from jets moving near the speed of light. Blazars are thought to be radio galaxies w ...
... collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxies that exhibit rapidly variable emission from the radio through gamma-ray band. The radiation is predominantly from jets moving near the speed of light. Blazars are thought to be radio galaxies w ...
star - Cloudfront.net
... The star continues to collapse inward until it cannot be pressed down any further. b. What is left is an extremely dense core of matter known as a white dwarf. c. A white dwarf is about the size of Earth and still shines for billions of years before it cools completely. d. As it cools, a white dwarf ...
... The star continues to collapse inward until it cannot be pressed down any further. b. What is left is an extremely dense core of matter known as a white dwarf. c. A white dwarf is about the size of Earth and still shines for billions of years before it cools completely. d. As it cools, a white dwarf ...
Eclipsing Binary Stars as Astrophysical Laboratories
... fairly close to each other. So when we see them in the sky, most of the eclipsing binary pairs are much too far away to distinguish or resolve into two stars. They appear to our eyes, with our low resolution, as a single star. Even with powerful telescopes, the stars we study here at Juniata are not ...
... fairly close to each other. So when we see them in the sky, most of the eclipsing binary pairs are much too far away to distinguish or resolve into two stars. They appear to our eyes, with our low resolution, as a single star. Even with powerful telescopes, the stars we study here at Juniata are not ...
KIC 10449976: discovery of an extreme helium
... The helium-rich subdwarfs may be subdivided into an extremely helium-rich class (nHe > 80 per cent) and an intermediate heliumrich class (10 < nHe < 80 per cent) (Naslim et al. 2012). None of the extremely helium-rich groups are known to pulsate or to be members of a binary system, with two exceptio ...
... The helium-rich subdwarfs may be subdivided into an extremely helium-rich class (nHe > 80 per cent) and an intermediate heliumrich class (10 < nHe < 80 per cent) (Naslim et al. 2012). None of the extremely helium-rich groups are known to pulsate or to be members of a binary system, with two exceptio ...
ON STARS, THEIR EVOLUTION AND THEIR STABILITY
... By integrating equation (44), with suitable boundary conditions and for various initially prescribed values ofyo, we can derive the exact mass-radius relation, as well as the other equilibrium properties, of the degenerate configurations. The principal results of such calculations are illustrated in ...
... By integrating equation (44), with suitable boundary conditions and for various initially prescribed values ofyo, we can derive the exact mass-radius relation, as well as the other equilibrium properties, of the degenerate configurations. The principal results of such calculations are illustrated in ...
Curiosities of the Sky
... found by photography in Sagittarius. One of Barnard's earliest and most excellent photographs includes two of them, both in the star-cluster M8. The larger, which is roughly rectangular in outline, contains one little star, and its smaller neighbor is lune-shaped -surely a most singular form for su ...
... found by photography in Sagittarius. One of Barnard's earliest and most excellent photographs includes two of them, both in the star-cluster M8. The larger, which is roughly rectangular in outline, contains one little star, and its smaller neighbor is lune-shaped -surely a most singular form for su ...
Spectral analysis for the RV Tau star R Sct: In this section, we will
... observation. The dates used by astronomers and the AAVSO web site are Julian Dates (the AAVSO web site also provides a converter from calendar date to JD). Once at the AAVSO web site, you will see a box on the upper left labeled “Pick a Star”. Type the star name (R Sct in our case) into the box, cli ...
... observation. The dates used by astronomers and the AAVSO web site are Julian Dates (the AAVSO web site also provides a converter from calendar date to JD). Once at the AAVSO web site, you will see a box on the upper left labeled “Pick a Star”. Type the star name (R Sct in our case) into the box, cli ...
Spectral Classification of Stars
... "If, on the contrary, two stars should really be situated very near each other, and at the same time so far insulated as not to be materially affected by the attractions of neighbouring stars, they will then compose a separate system, and remain united by the bond of their own mutual gravitation tow ...
... "If, on the contrary, two stars should really be situated very near each other, and at the same time so far insulated as not to be materially affected by the attractions of neighbouring stars, they will then compose a separate system, and remain united by the bond of their own mutual gravitation tow ...
“From Planetesimals to Brown Dwarfs: What is a Planet
... history from planets in our Solar System, since their current orbits would have been inside the supergiant star that preceded the central pulsar. The next large group of (gas giant) exoplanets (well over 100 at this point), were discovered by the radial velocity variability they induce in their hos ...
... history from planets in our Solar System, since their current orbits would have been inside the supergiant star that preceded the central pulsar. The next large group of (gas giant) exoplanets (well over 100 at this point), were discovered by the radial velocity variability they induce in their hos ...
The Effects of Atmospheric Turbulence on Simulated
... accurate with filtration, the difference in the respective results would be small enough to be insignificant. Our results are very promising as the error from atmospheric turbulence is only one-fifth of a wavelength. When spread out over an image of 1000 pixels, the error per pixel is only 0.0002. This ...
... accurate with filtration, the difference in the respective results would be small enough to be insignificant. Our results are very promising as the error from atmospheric turbulence is only one-fifth of a wavelength. When spread out over an image of 1000 pixels, the error per pixel is only 0.0002. This ...
Observers` Forum - British Astronomical Association
... arcmin (over 6 times the diameter of the full Moon), wide field instruments will be needed if the nebula is to be captured without stitching individual frames together. The photograph shown here, the only one received so far by the Section, was taken by Bob Winter from rural Wales during 2010 Januar ...
... arcmin (over 6 times the diameter of the full Moon), wide field instruments will be needed if the nebula is to be captured without stitching individual frames together. The photograph shown here, the only one received so far by the Section, was taken by Bob Winter from rural Wales during 2010 Januar ...