Next Generation VLA Science White Paper
... Radio telescopes are essential to our understanding of “galaxy ecosytems,” here meaning the complex interplay of gas, stars, black holes, and dark matter in and around galaxies. They provide a main tool to study almost all phases of gas in galaxies: cool and cold gas (via emission and absorption lin ...
... Radio telescopes are essential to our understanding of “galaxy ecosytems,” here meaning the complex interplay of gas, stars, black holes, and dark matter in and around galaxies. They provide a main tool to study almost all phases of gas in galaxies: cool and cold gas (via emission and absorption lin ...
Part IV: Stars
... interior, photons can only travel a fraction of a millimeter before “colliding” with an electron and deflecting into a new direction. So photons bounce around at random and only slowly make their way out of the Sun. Mathematical models use the observed composition and mass of the Sun, along with the ...
... interior, photons can only travel a fraction of a millimeter before “colliding” with an electron and deflecting into a new direction. So photons bounce around at random and only slowly make their way out of the Sun. Mathematical models use the observed composition and mass of the Sun, along with the ...
Suppose you tried to determine where we are in the galaxy by
... a) We can't count enough stars to get a good result. b) Interstellar dust blocks our view. c) Black holes distort the light from distant regions, giving a false result. d) Light from far-away stars that have died block our view, giving a false result. ...
... a) We can't count enough stars to get a good result. b) Interstellar dust blocks our view. c) Black holes distort the light from distant regions, giving a false result. d) Light from far-away stars that have died block our view, giving a false result. ...
SPACETIME SINGULARITIES: The STORY of BLACK HOLES
... with the mass of the earth would have Rs ∼ 9mm! What this means is that we would have to cram the entire mass of the earth into a region of diameter less than 18mm (just over the size of a dime) before the gravitational field exerted by this mass would be strong enough to hold back light, and for it ...
... with the mass of the earth would have Rs ∼ 9mm! What this means is that we would have to cram the entire mass of the earth into a region of diameter less than 18mm (just over the size of a dime) before the gravitational field exerted by this mass would be strong enough to hold back light, and for it ...
Astronomy Assignment #1
... (due West) for all observers independent of their latitude. An observer in the northern hemisphere will see the celestial equator cross the local meridian looking south, while an observer in the southern hemisphere will see the celestial equator cross the local meridian looking north. The altitude o ...
... (due West) for all observers independent of their latitude. An observer in the northern hemisphere will see the celestial equator cross the local meridian looking south, while an observer in the southern hemisphere will see the celestial equator cross the local meridian looking north. The altitude o ...
6.1 Introduction
... A further example is provided by the relative element ratios in the atmospheres of stars that have evolved off the main sequence. In some cases, material deep in the stellar core is ‘dredged up’ to the surface. The composition of this gas can be quite different from that of the interstellar cloud fr ...
... A further example is provided by the relative element ratios in the atmospheres of stars that have evolved off the main sequence. In some cases, material deep in the stellar core is ‘dredged up’ to the surface. The composition of this gas can be quite different from that of the interstellar cloud fr ...
General Astrophysics And Comparative Planetology
... The TPF missions are designed for the purpose of studying extrasolar planetary systems; their high-contrast, high angular resolution capabilities make them many orders of magnitude more powerful than any other planned missions for this purpose. We include a discussion of comparative planetology in t ...
... The TPF missions are designed for the purpose of studying extrasolar planetary systems; their high-contrast, high angular resolution capabilities make them many orders of magnitude more powerful than any other planned missions for this purpose. We include a discussion of comparative planetology in t ...
12 Introduction to Cepheid Variable Stars Exercise
... periods of 25 cepheid variables in the Large and Small Magellanic Clouds. Miss Leavitt noted that when the cepheids were ordered by increasing period that the variable stars were also ordered by increasing brightness. Because both the Small Magellanic Cloud and the Large Magellanic Cloud are each a ...
... periods of 25 cepheid variables in the Large and Small Magellanic Clouds. Miss Leavitt noted that when the cepheids were ordered by increasing period that the variable stars were also ordered by increasing brightness. Because both the Small Magellanic Cloud and the Large Magellanic Cloud are each a ...
Article PDF - IOPscience
... stars should conform to the Oosterhoff dichotomy we observe for the MW field and cluster stars. The absence of an Oosterhoff dichotomy, along with differences in the chemical abundances (e.g., Shetrone et al. 2001, Helmi et al. 2006), thus seem to rule out the bright dwarf galaxies surrounding the M ...
... stars should conform to the Oosterhoff dichotomy we observe for the MW field and cluster stars. The absence of an Oosterhoff dichotomy, along with differences in the chemical abundances (e.g., Shetrone et al. 2001, Helmi et al. 2006), thus seem to rule out the bright dwarf galaxies surrounding the M ...
Isotopic composition of Hg and Pt in 5 slowly rotating HgMn stars *
... neither extreme overabundances of rare earths, nor signicant overabundances of Si. Their spectral lines do not show conspicuous intensity variations. Neither have strong Send oprint requests to : G. Mathys ? Based on observations obtained at the European Southern Observatory, La Silla, Chile (ESO ...
... neither extreme overabundances of rare earths, nor signicant overabundances of Si. Their spectral lines do not show conspicuous intensity variations. Neither have strong Send oprint requests to : G. Mathys ? Based on observations obtained at the European Southern Observatory, La Silla, Chile (ESO ...
Protostellar/PMS Mass Infall Luminosity Problem
... mass, as in the Herschel Orion Protostar Survey (HOPS, Manoj et al. 2013; Fisher et al. 2013; Stutz et al. 2013) ...
... mass, as in the Herschel Orion Protostar Survey (HOPS, Manoj et al. 2013; Fisher et al. 2013; Stutz et al. 2013) ...
Chapter 10
... 1. Discuss our local neighborhoods in space including the names and approximate sizes of our own objects, and the names of and approximate distances to our nearest neighbors. Neighborhoods include planets, stars, galactic arms, galaxies, galaxy clusters, superclusters, and universes. 2. What does th ...
... 1. Discuss our local neighborhoods in space including the names and approximate sizes of our own objects, and the names of and approximate distances to our nearest neighbors. Neighborhoods include planets, stars, galactic arms, galaxies, galaxy clusters, superclusters, and universes. 2. What does th ...
Senior thesis - University of Texas Astronomy Home Page
... right. Calculations and figure courtesy of Mike Montgomery white dwarf, slight changes in temperature and pressure cause the fluid to vertically move up or down. In attempting to correct for this motion, this rising or sinking fluid will tend to “overshoot” its equilibrium point due to its own momen ...
... right. Calculations and figure courtesy of Mike Montgomery white dwarf, slight changes in temperature and pressure cause the fluid to vertically move up or down. In attempting to correct for this motion, this rising or sinking fluid will tend to “overshoot” its equilibrium point due to its own momen ...
Stars
... Stars can differ from the Sun by : Mass, age , Metallicity, Y Convective core Rotation ...
... Stars can differ from the Sun by : Mass, age , Metallicity, Y Convective core Rotation ...
The first carbon-enhanced metal-poor star found in the Sculptor
... spheroidal galaxies around the Milky Way. Here we present detailed abundances from ESO VLT/UVES high-resolution spectroscopy for ET0097, the first CEMP star found in the Sculptor dwarf spheroidal, which is one of the best studied dwarf galaxies in the Local Group. This star has [Fe/H] = −2.03 ± 0.10 ...
... spheroidal galaxies around the Milky Way. Here we present detailed abundances from ESO VLT/UVES high-resolution spectroscopy for ET0097, the first CEMP star found in the Sculptor dwarf spheroidal, which is one of the best studied dwarf galaxies in the Local Group. This star has [Fe/H] = −2.03 ± 0.10 ...
FREE Sample Here
... 26. Assume the size of the Sun is represented by a baseball with the Earth is about 15 meters (150 million km or 8 light minutes) away. How far away, to scale, would the nearest stars to the Sun be? Pick the closest answer. a. About the distance between New York and Boston. (330 km) b. 100 meters aw ...
... 26. Assume the size of the Sun is represented by a baseball with the Earth is about 15 meters (150 million km or 8 light minutes) away. How far away, to scale, would the nearest stars to the Sun be? Pick the closest answer. a. About the distance between New York and Boston. (330 km) b. 100 meters aw ...
Aryabhatta Research Institute of Observational Sciences
... rates of observed species with heliocentric distance. Emission bands of NH, CN, CH, C2 , C3 and NaI were studied in these comets. It was found that with heliocentric distance, gas production rate does not vary while C2 and CN production rates show variation (Sanwal et al. 2004). ...
... rates of observed species with heliocentric distance. Emission bands of NH, CN, CH, C2 , C3 and NaI were studied in these comets. It was found that with heliocentric distance, gas production rate does not vary while C2 and CN production rates show variation (Sanwal et al. 2004). ...
Homework #3, AST 1002
... Which of the following is (are) correct? (a) If one star is five magnitudes greater than another star, it is 100 times fainter than that second star. (b) The absolute magnitude is the apparent magnitude that a star would have at a distance of 1000 parsec. (c) Comets have very elliptical orbits. The ...
... Which of the following is (are) correct? (a) If one star is five magnitudes greater than another star, it is 100 times fainter than that second star. (b) The absolute magnitude is the apparent magnitude that a star would have at a distance of 1000 parsec. (c) Comets have very elliptical orbits. The ...
Institute for Astrophysical Research Seminar Series
... Heidi Newberg (RPI) Will the real stellar halo please stand up? ...
... Heidi Newberg (RPI) Will the real stellar halo please stand up? ...
A radiogenic heating evolution model for cosmochemically Earth
... recycling approximation (IRA), which states that stellar lifetimes are negligible relative to the timescale of gas consumption, and the instantaneous mixing approximation (IMA), which assumes that stellar ejecta are mixed instantaneously in the ISM. Together, these assumptions imply that short-lived ...
... recycling approximation (IRA), which states that stellar lifetimes are negligible relative to the timescale of gas consumption, and the instantaneous mixing approximation (IMA), which assumes that stellar ejecta are mixed instantaneously in the ISM. Together, these assumptions imply that short-lived ...
Astronomy Astrophysics Detailed abundances of a large sample of giant stars in... and in the Sagittarius nucleus
... delay between individual bursts is required, to allow the replenishing of a gas pool up to some critical threshold. Multiple (even relatively recent) episodes of star formation in these objects carry a strong resemblance to what is found for dwarf galaxies in the local universe (e.g. Tolstoy et al. ...
... delay between individual bursts is required, to allow the replenishing of a gas pool up to some critical threshold. Multiple (even relatively recent) episodes of star formation in these objects carry a strong resemblance to what is found for dwarf galaxies in the local universe (e.g. Tolstoy et al. ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.