Microsoft Word
... region of Stock 8 have larger (H-K) excess in comparison to those located in the central region of Stock 8. The (H-K) excess, V/(V-I) and K/(H-K) CMDs indicate that these YSOs are younger than those located in the central region of Stock 8. The radio continuum, MSX, IRAS maps and the ratio of SII/Hα ...
... region of Stock 8 have larger (H-K) excess in comparison to those located in the central region of Stock 8. The (H-K) excess, V/(V-I) and K/(H-K) CMDs indicate that these YSOs are younger than those located in the central region of Stock 8. The radio continuum, MSX, IRAS maps and the ratio of SII/Hα ...
Document
... Understand that the sun is changing and will burn out over a lifespan of approximately 10 billion years.
Identify the sun as an average main sequence star that will expand to a red giant phase, and then collapse into a white dwarf.
As.6.2
Discuss why some stars end up as white ...
... Understand that the sun is changing and will burn out over a lifespan of approximately 10 billion years.
26.Meikle.Supernova_2002hh
... Supernova 2002hh was discovered in the galaxy NGC 6946 in Oct. 2002. It is a type II supernova, which means that it resulted from the collapse of the core of a massive star at the end of its lifetime. The objective of the observations is to understand the nature of the explosion mechanism and the p ...
... Supernova 2002hh was discovered in the galaxy NGC 6946 in Oct. 2002. It is a type II supernova, which means that it resulted from the collapse of the core of a massive star at the end of its lifetime. The objective of the observations is to understand the nature of the explosion mechanism and the p ...
Solutions - Yale Astronomy
... 4.b. A light-year is the distance that light travels in one year. Since Sirius is at a distance of 8.48 ly (see 4.a) it takes 8.48 years for light to travel from Sirius .(3pts) 4.c. Since Sirius is far away from the Earth (at distance d), we suppose that the hypothesized planet would be observed ver ...
... 4.b. A light-year is the distance that light travels in one year. Since Sirius is at a distance of 8.48 ly (see 4.a) it takes 8.48 years for light to travel from Sirius .(3pts) 4.c. Since Sirius is far away from the Earth (at distance d), we suppose that the hypothesized planet would be observed ver ...
The Southern Fall PDF - Treasures of the Southern Sky
... few obvious star-forming regions, and it emphasizes the very bright nucleus. NGC 3521 is superficially similar to Messier 63 and belongs to the class of compact bright galaxies recognized as lacking a welldefined spiral arm structure. Such galaxies have an appearance that is as remote from the “gran ...
... few obvious star-forming regions, and it emphasizes the very bright nucleus. NGC 3521 is superficially similar to Messier 63 and belongs to the class of compact bright galaxies recognized as lacking a welldefined spiral arm structure. Such galaxies have an appearance that is as remote from the “gran ...
HR Diagrams
... probably show a pattern, rising from the lower left corner (shorter, lighter people) toward the upper right corner (taller, heavier people). In the early 1900s, two astronomers, Eljinar Hertzsprung, from Denmark, and Henry Norris Russell, an American, made a similar plot using data they had for near ...
... probably show a pattern, rising from the lower left corner (shorter, lighter people) toward the upper right corner (taller, heavier people). In the early 1900s, two astronomers, Eljinar Hertzsprung, from Denmark, and Henry Norris Russell, an American, made a similar plot using data they had for near ...
Supermassive Black Holes in Inactive Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org
... are outlined in the article SUPERMASSIVE BLACK HOLES IN AGN. AGN engines are believed to be supermassive black holes (BHs) that accrete gas and stars and so transform gravitational potential energy into radiation. Expected BH masses are M• ~ 106–109.5M⊙. A wide array of phenomena can be understood w ...
... are outlined in the article SUPERMASSIVE BLACK HOLES IN AGN. AGN engines are believed to be supermassive black holes (BHs) that accrete gas and stars and so transform gravitational potential energy into radiation. Expected BH masses are M• ~ 106–109.5M⊙. A wide array of phenomena can be understood w ...
Project 4: The HR diagram. Open clusters
... technique involves getting images of the cluster through two filters, B and V in our case, reducing the data and plotting V versus (B‐V). ...
... technique involves getting images of the cluster through two filters, B and V in our case, reducing the data and plotting V versus (B‐V). ...
Chapter 16 - Astronomy
... 1. Observations in the early part of the 20th century revealed that the center of the Galaxy lies in the direction of Sagittarius. 2. Because the presence of dust and gas in the Galactic plane dims visible light from the nucleus, it wasn’t until the development of IR/radio and X-ray/gamma-ray astron ...
... 1. Observations in the early part of the 20th century revealed that the center of the Galaxy lies in the direction of Sagittarius. 2. Because the presence of dust and gas in the Galactic plane dims visible light from the nucleus, it wasn’t until the development of IR/radio and X-ray/gamma-ray astron ...
A Study of the Spiral Galaxy M101 Elizabeth City State University
... show examples of each type. Galaxies have an enormous range in mass and size as indicated in Table 1. Galaxies are separated by vast gulfs of space. For example, our own Milky Way is over 160,000 light years away from its nearest extragalactic neighbor, the Large Magellanic Cloud. Despite these larg ...
... show examples of each type. Galaxies have an enormous range in mass and size as indicated in Table 1. Galaxies are separated by vast gulfs of space. For example, our own Milky Way is over 160,000 light years away from its nearest extragalactic neighbor, the Large Magellanic Cloud. Despite these larg ...
Molecular Gas in Nearby Dwarf Galaxies:
... A CO survey of IRAS-detected, compact, nearby, northern dwarf galaxies out to VLSR=1000 km s-1, with rotational velocities under ~100 km s-1 Observed 121 central pointings with the Kitt Peak 12m Follow up of 30+ galaxies mapped using BIMA Fabian Walter’s OVRO sample ...
... A CO survey of IRAS-detected, compact, nearby, northern dwarf galaxies out to VLSR=1000 km s-1, with rotational velocities under ~100 km s-1 Observed 121 central pointings with the Kitt Peak 12m Follow up of 30+ galaxies mapped using BIMA Fabian Walter’s OVRO sample ...
$doc.title
... effect of the large-scale structure or the outskirts of clusters of galaxies on the background sources (galaxies). These image distortions can then be inverted to map the mass distribution. ...
... effect of the large-scale structure or the outskirts of clusters of galaxies on the background sources (galaxies). These image distortions can then be inverted to map the mass distribution. ...
Exploration of the Milky Way and Nearby galaxies
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
Galaxies over the Latter Half of Cosmic Time
... Galaxies over the Latter Half of Cosmic Time Marc Davis and Sandra M. Faber Galaxies are the basic systems of the universe. Like diamonds strewn across the sky, their tiny points of light mark the cosmic landscape. They reveal its organization into superclusters of thousands of galaxies, which bord ...
... Galaxies over the Latter Half of Cosmic Time Marc Davis and Sandra M. Faber Galaxies are the basic systems of the universe. Like diamonds strewn across the sky, their tiny points of light mark the cosmic landscape. They reveal its organization into superclusters of thousands of galaxies, which bord ...
PPT - Wayne State University Physics and Astronomy
... Astronomical unit (AU): Earth-Sun distance (way too small to be useful). ...
... Astronomical unit (AU): Earth-Sun distance (way too small to be useful). ...
THE HR DIAGRAM
... began to classify stars based on spectral differences, and although these classes were known, their significance was not. Remember, knowledge about the existence of other galaxies, the Hubble redshift, quantum mechanics, and the fusion process generating stellar energy came in the thi ...
... began to classify stars based on spectral differences, and although these classes were known, their significance was not. Remember, knowledge about the existence of other galaxies, the Hubble redshift, quantum mechanics, and the fusion process generating stellar energy came in the thi ...
Star
... • By applying the Doppler Effect (the apparent change in wavelength of radiation caused by the motions of the source and the observer) to the light of galaxies, galactic motion can be determined. • Large Doppler shift indicates a high velocity • Small Doppler shift indicates a lower velocity • It wa ...
... • By applying the Doppler Effect (the apparent change in wavelength of radiation caused by the motions of the source and the observer) to the light of galaxies, galactic motion can be determined. • Large Doppler shift indicates a high velocity • Small Doppler shift indicates a lower velocity • It wa ...
DTU_9e_ch15
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
The Classification of Galaxies By Daniel Underwood Contents The
... References Zeilik & Gregory – Introductory Astronomy and Astrophysics, ...
... References Zeilik & Gregory – Introductory Astronomy and Astrophysics, ...
Stellar populations
... • About 400 known; ~18000 may exist in Galaxy • Gal. latitude b ≤ 5º in most cases, very few >10º • Open clusters are mainly young Popn I objects • Typically they contain a few hundred stars • The stars are coeval (of same age), at essentially same distance and of same metallicity • There is a sprea ...
... • About 400 known; ~18000 may exist in Galaxy • Gal. latitude b ≤ 5º in most cases, very few >10º • Open clusters are mainly young Popn I objects • Typically they contain a few hundred stars • The stars are coeval (of same age), at essentially same distance and of same metallicity • There is a sprea ...
Shining Light on the Stars: The Hertzsprung-Russell
... A star’s color is related to one of its most important properties: its surface temperature. Consider our three stars again. Red stars like Betelgeuse are the coolest with surface temperatures of about three or four thousand degrees Kelvin, where Kelvin degrees come from a temperature scale related t ...
... A star’s color is related to one of its most important properties: its surface temperature. Consider our three stars again. Red stars like Betelgeuse are the coolest with surface temperatures of about three or four thousand degrees Kelvin, where Kelvin degrees come from a temperature scale related t ...
Lectures 12 & 13 powerpoint (stellar death)
... Evolution of binary systems: Gravitational field of the stars combined with the rotation of the system define the “Roche surface.” Matter inside a star’s Roche surface is gravitationally bound to the star, but… Two ways in which matter can be transferred through L1; ...
... Evolution of binary systems: Gravitational field of the stars combined with the rotation of the system define the “Roche surface.” Matter inside a star’s Roche surface is gravitationally bound to the star, but… Two ways in which matter can be transferred through L1; ...
Beginning of the Universe Classwork Name: 6th Grade PSI Science
... Artist's idea of a black hole, with gas and dust swirling rapidly around it before being pulled in by its powerful gravitational field. You can't really see the black hole itself. Black holes are not really holes at all. They are the opposite of empty! Black holes have the most matter stuffed into t ...
... Artist's idea of a black hole, with gas and dust swirling rapidly around it before being pulled in by its powerful gravitational field. You can't really see the black hole itself. Black holes are not really holes at all. They are the opposite of empty! Black holes have the most matter stuffed into t ...
PPT - ALFALFA survey
... Schneider (2000). It was a drift-scan survey taken in a series of declination strips with the Arecibo 305-m telescope. The velocity limit of the ADBS is 8000 km/s (it is volume limited!). The full ADBS sample includes 265 galaxies over ~420 sq. ...
... Schneider (2000). It was a drift-scan survey taken in a series of declination strips with the Arecibo 305-m telescope. The velocity limit of the ADBS is 8000 km/s (it is volume limited!). The full ADBS sample includes 265 galaxies over ~420 sq. ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.