ultracam observations of pulsating sdB stars
... 0.2 M/ metal-poor - blue HB 0. - .05 M - EHB / sdB Problems: How does RGB star lose its entire H envelope? How does it still suffer Heflash? ...
... 0.2 M/ metal-poor - blue HB 0. - .05 M - EHB / sdB Problems: How does RGB star lose its entire H envelope? How does it still suffer Heflash? ...
Document
... with the Sun in its orbit around the center of the Galaxy • This region is inside a large bubble of hot interstellar gas called the Local Bubble. Here the gas temperature is about 1 million degrees Kelvin and the density is 1000 times less than average interstellar space. ...
... with the Sun in its orbit around the center of the Galaxy • This region is inside a large bubble of hot interstellar gas called the Local Bubble. Here the gas temperature is about 1 million degrees Kelvin and the density is 1000 times less than average interstellar space. ...
Black Holes: Edge of Infinity Jonathan McKinney
... •BH surrounded by disk •Stars can form in outer disk •10% are “active” with jets •Jets observed mostly in radio ...
... •BH surrounded by disk •Stars can form in outer disk •10% are “active” with jets •Jets observed mostly in radio ...
l13
... Expected neutrino flux for the SN at this distance (about 50 kpc) was 1013 m-2. How many detected ? Two experiments (Kamiokande and IMB) simultaneously detected neutrino burst, and the entire neutrino capture events last 12s. This occurred before the SN was optically detected (or could have become v ...
... Expected neutrino flux for the SN at this distance (about 50 kpc) was 1013 m-2. How many detected ? Two experiments (Kamiokande and IMB) simultaneously detected neutrino burst, and the entire neutrino capture events last 12s. This occurred before the SN was optically detected (or could have become v ...
Anomalous diffusion in generalised Ornstein
... If there are viscous forces acting, they cause a torque which speeds up material at higher radius, and slows material at smaller radius. Angular momentum is transferred from the centre to the outside of the disc. As the material at small radius slows, gravity draws it inwards. Viscous torque causes ...
... If there are viscous forces acting, they cause a torque which speeds up material at higher radius, and slows material at smaller radius. Angular momentum is transferred from the centre to the outside of the disc. As the material at small radius slows, gravity draws it inwards. Viscous torque causes ...
of the Sun
... • Both matter and anti-matter formed, but for some reason, there was a slight excess of matter. ...
... • Both matter and anti-matter formed, but for some reason, there was a slight excess of matter. ...
Supernova scrutiny: Astronomers look inside the heart of a dying
... These observations have helped astronomers rule out previous theories about how stars explode, but NuSTAR’s measurements have also raised further questions. The astronomers found that the map of titanium-44 recorded by the telescope does not match up with the map of iron created by other telescopes ...
... These observations have helped astronomers rule out previous theories about how stars explode, but NuSTAR’s measurements have also raised further questions. The astronomers found that the map of titanium-44 recorded by the telescope does not match up with the map of iron created by other telescopes ...
The Sun and Beyond - Valhalla High School
... The Milky Way- our home galaxy Milky Way Local GroupThe Milky Way is not an island universe, but a member of a small cluster of galaxies called the Local Group. The Local Group contains about 3 dozen known galaxies, clumped in two subgroups around two massive spiral galaxies -the Milky Way, a ...
... The Milky Way- our home galaxy Milky Way Local GroupThe Milky Way is not an island universe, but a member of a small cluster of galaxies called the Local Group. The Local Group contains about 3 dozen known galaxies, clumped in two subgroups around two massive spiral galaxies -the Milky Way, a ...
High-Speed Ballistic Stellar Interlopers
... indicates that the stars are traveling fast with respect to their surroundings—roughly five times faster than typical young stars. The interlopers were most likely ejected from massive star clusters. Assuming their youthful phase lasts only a million years and they are traveling 100,000 miles per ho ...
... indicates that the stars are traveling fast with respect to their surroundings—roughly five times faster than typical young stars. The interlopers were most likely ejected from massive star clusters. Assuming their youthful phase lasts only a million years and they are traveling 100,000 miles per ho ...
Star Formation in the Milky Way - HubbleSOURCE
... that a dark cloud should have to collapse on its own from self-gravity dominating internal pressure. ...
... that a dark cloud should have to collapse on its own from self-gravity dominating internal pressure. ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... Neutron stars are usually 10 kilometers acroos But more massive than the Sun Made almost entirely of neutrons Electrons and protons have fused together ...
... Neutron stars are usually 10 kilometers acroos But more massive than the Sun Made almost entirely of neutrons Electrons and protons have fused together ...
Colonization of the Milky Way The distances between the stars are
... how long it takes to get from one star to another. If a species had a strong planet grab instinct it could easily occupy every single planetary system in our entire galaxy within a billion years. They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machin ...
... how long it takes to get from one star to another. If a species had a strong planet grab instinct it could easily occupy every single planetary system in our entire galaxy within a billion years. They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machin ...
Radio-quiet Isolated Neutron Stars
... Detected in the RASS between 1990/09/14~1990/10/02. Identified with the 1992/10/16 PSPC data. No variability at levels greater than ~1% in 1hr, or <30% on timescale up to 15 years. ...
... Detected in the RASS between 1990/09/14~1990/10/02. Identified with the 1992/10/16 PSPC data. No variability at levels greater than ~1% in 1hr, or <30% on timescale up to 15 years. ...
Jeopardy - Cloudfront.net
... a. absorption spectrum of elements to the emission spectra of a star b. continuous spectrum of elements to the emission spectra of a star c. emission spectrum of elements to the absorption spectra of a star d. emission spectrum of elements to continuous spectra of a star ...
... a. absorption spectrum of elements to the emission spectra of a star b. continuous spectrum of elements to the emission spectra of a star c. emission spectrum of elements to the absorption spectra of a star d. emission spectrum of elements to continuous spectra of a star ...
Reach for the Stars – Div. B
... 1b. Hertzsprung-Russell (H-R) diagram is a way to represent the evolution of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives: Hydrogen fusing to Helium in the star’s core 3. Stars remain stable for long periods (on the main sequence) by ba ...
... 1b. Hertzsprung-Russell (H-R) diagram is a way to represent the evolution of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives: Hydrogen fusing to Helium in the star’s core 3. Stars remain stable for long periods (on the main sequence) by ba ...
Document
... form is of great importance, as it determines which types of material get accumulated into the planets. Resulting from frictional heating, the temperature decreases with the distance from the central star. Figure 2.2 shows the situation for the solar nebula. From the observed mean densities of the p ...
... form is of great importance, as it determines which types of material get accumulated into the planets. Resulting from frictional heating, the temperature decreases with the distance from the central star. Figure 2.2 shows the situation for the solar nebula. From the observed mean densities of the p ...
Southern cross Crux - The Southern Cross Crux, the Southern Cross
... Crux lies along the southern Milky Way. It is rich in star clusters, and includes the Coalsack dust cloud. NGC 4755 is called the Jewel Box cluster. It contains about 60 stars ranging in magnitude from 6 to 10. The Jewel Box is one of the brightest and youngest clusters known. The stars are mostly s ...
... Crux lies along the southern Milky Way. It is rich in star clusters, and includes the Coalsack dust cloud. NGC 4755 is called the Jewel Box cluster. It contains about 60 stars ranging in magnitude from 6 to 10. The Jewel Box is one of the brightest and youngest clusters known. The stars are mostly s ...
Review
... B) The gas planets are farther from the Sun than the four inner planets C) All the planets orbit in the same direction D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light ...
... B) The gas planets are farther from the Sun than the four inner planets C) All the planets orbit in the same direction D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light ...
Solar Lithium Mystery Solved
... conducted a survey of 500 stars, nearly 25% of which are like our own sun (Nature 2009, 462, 189). Seventy of the sunlike stars are known to have planetary systems. Most of the stars that host planets have on average one-tenth the amount of lithium of sunlike stars without planets. The researchers s ...
... conducted a survey of 500 stars, nearly 25% of which are like our own sun (Nature 2009, 462, 189). Seventy of the sunlike stars are known to have planetary systems. Most of the stars that host planets have on average one-tenth the amount of lithium of sunlike stars without planets. The researchers s ...
Section 4.4: Where did the elements come from?
... Right after the big bang, temperatures were so high that only energy could exist. As the universe expanded, it cooled and protons and neutrons, and electrons condensed out of the energy. Further cooling caused these particles to coalesce into hydrogen and helium atoms. Over time, huge clouds of hydr ...
... Right after the big bang, temperatures were so high that only energy could exist. As the universe expanded, it cooled and protons and neutrons, and electrons condensed out of the energy. Further cooling caused these particles to coalesce into hydrogen and helium atoms. Over time, huge clouds of hydr ...
Teacher Guide
... Emission spectrum – a spectrum of colored lines on a dark background. Also called a bright line spectrum. ...
... Emission spectrum – a spectrum of colored lines on a dark background. Also called a bright line spectrum. ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.