Molecular Gas in Galactic Environments Abstracts (Poster)
... we present new results on the UHV irradiation of cryogenic (22 K) multilayer films of CO2 and NH3 with 70 eV electrons, leading to CN, and other new bond formations. Mass resolved electron stimulated desorption yields of cations and anions are recorded as a function of electron fluence. The prompt d ...
... we present new results on the UHV irradiation of cryogenic (22 K) multilayer films of CO2 and NH3 with 70 eV electrons, leading to CN, and other new bond formations. Mass resolved electron stimulated desorption yields of cations and anions are recorded as a function of electron fluence. The prompt d ...
CENTRAL TEXAS COLLEGE
... provide a sense of the mystery and majesty of the universe. As with our ancestors back beyond recorded time, we can’t help but wonder what kind of Universe is this? What are its fundamental laws? How old is it? How big? What does it contain? How has it changed with time, and what may be its future? ...
... provide a sense of the mystery and majesty of the universe. As with our ancestors back beyond recorded time, we can’t help but wonder what kind of Universe is this? What are its fundamental laws? How old is it? How big? What does it contain? How has it changed with time, and what may be its future? ...
Physics of Star Formation: Milky Way and Beyond
... AU separations), such that the wide binaries show a preferred alignment with the semi-major axis of their parent core, whereas the tight binaries show no preferred orientations. We conduct several simple evolutionary models to explain the observed populations of binaries and individual stars, findi ...
... AU separations), such that the wide binaries show a preferred alignment with the semi-major axis of their parent core, whereas the tight binaries show no preferred orientations. We conduct several simple evolutionary models to explain the observed populations of binaries and individual stars, findi ...
The 2008 RBSE Journal - National Optical Astronomy Observatory
... A Double Radio Source Associated with a Galactic Nucleus (DRAGN) is a radio source that is produced by jets produced by active galactic nucleus that is not in the Milky Way. This happens when an accretion disk forms around a black hole and spins, converts gravitational and rotational energy into exc ...
... A Double Radio Source Associated with a Galactic Nucleus (DRAGN) is a radio source that is produced by jets produced by active galactic nucleus that is not in the Milky Way. This happens when an accretion disk forms around a black hole and spins, converts gravitational and rotational energy into exc ...
Chapter 25 - Haiku Learning
... Earth. The universe is incomprehensibly large. What is the nature of this vast universe? Do stars move, or do they remain in one place? Does the universe extend infinitely in all directions, or does it have boundaries? This chapter will answer these questions by examining the universe and the most nu ...
... Earth. The universe is incomprehensibly large. What is the nature of this vast universe? Do stars move, or do they remain in one place? Does the universe extend infinitely in all directions, or does it have boundaries? This chapter will answer these questions by examining the universe and the most nu ...
19_Testbank - Lick Observatory
... D) the region of space cleared by a powerful supernova E) a cloud of gas that can form a million or more stars Answer: A 17) Sound waves in space A) do not exist. B) travel so slowly that they are unnoticeable. C) travel much faster than sound on Earth but have such low density that they are inaudib ...
... D) the region of space cleared by a powerful supernova E) a cloud of gas that can form a million or more stars Answer: A 17) Sound waves in space A) do not exist. B) travel so slowly that they are unnoticeable. C) travel much faster than sound on Earth but have such low density that they are inaudib ...
Rest-frame Optical Spectra: A Window into Galaxy Formation at z~2
... yield key insights into the stellar and gaseous content of galaxies. • At z > 1.4, [OII] moves past ...
... yield key insights into the stellar and gaseous content of galaxies. • At z > 1.4, [OII] moves past ...
Super-solar Metal Abundances in Two Galaxies at ζ ∼ 3.57
... gamma-ray burst GRB 090323. The two systems, at redshift z = 3.5673 and z = 3.5774 (separation ∆v ≈ 660 km s−1 ), are dominated by the neutral gas in the interstellar medium of the parent galaxies. From the singly ionized zinc and sulfur, we estimate oversolar metallicities of [Zn/H] = +0.29 ± 0.10 ...
... gamma-ray burst GRB 090323. The two systems, at redshift z = 3.5673 and z = 3.5774 (separation ∆v ≈ 660 km s−1 ), are dominated by the neutral gas in the interstellar medium of the parent galaxies. From the singly ionized zinc and sulfur, we estimate oversolar metallicities of [Zn/H] = +0.29 ± 0.10 ...
distance
... Looks like the sum of many star spectra. More light from bright stars, less from faint stars. ← This is what we observe. ...
... Looks like the sum of many star spectra. More light from bright stars, less from faint stars. ← This is what we observe. ...
WORD - Astrophysics
... A very large optical-infrared telescope will allow us to derive the important processes of galaxy formation and evolution in the full range of environments. Several complementary lines of attack are possible, directly connecting present-day Universe with the high redshift Universe, where the old sta ...
... A very large optical-infrared telescope will allow us to derive the important processes of galaxy formation and evolution in the full range of environments. Several complementary lines of attack are possible, directly connecting present-day Universe with the high redshift Universe, where the old sta ...
3.1 Radio Astronomy Research Results For much of PY 2010, radio
... AGES Virgo cluster data, and is taking up a post-doctoral position at Arecibo. An NSF REU student, Tim Taber, will present his work on UGC2082 at the winter AAS. An AGES objective is to investigate the number of low mass gas rich dwarf galaxies that reside around isolated galaxies and within galaxy ...
... AGES Virgo cluster data, and is taking up a post-doctoral position at Arecibo. An NSF REU student, Tim Taber, will present his work on UGC2082 at the winter AAS. An AGES objective is to investigate the number of low mass gas rich dwarf galaxies that reside around isolated galaxies and within galaxy ...
Curtis/Shapley Debate – 1920 - Tufts Institute of Cosmology
... simpler explanation for certain `retrograde' motions of the planets than the Ptolemaic geocentric theory but encountered stiff resistance from those who felt it was heretical to move humanity so far from the center of the universe. The Italian Scientist Galileo Galilei greatly supported Copernicus's ...
... simpler explanation for certain `retrograde' motions of the planets than the Ptolemaic geocentric theory but encountered stiff resistance from those who felt it was heretical to move humanity so far from the center of the universe. The Italian Scientist Galileo Galilei greatly supported Copernicus's ...
IR Universe
... enhancement along a great circle above the galactic plane. This enhancement is caused by galaxies in the Local Supercluster. Reddish sources, the infrared cirrus, are extremely cold material close to us in our own Galaxy. Black areas were not surveyed by IRAS. ...
... enhancement along a great circle above the galactic plane. This enhancement is caused by galaxies in the Local Supercluster. Reddish sources, the infrared cirrus, are extremely cold material close to us in our own Galaxy. Black areas were not surveyed by IRAS. ...
2_ISM - UCT Astronomy Department
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
Video Lesson Information Astronomy: Observations & Theories Astronomy 1
... important for the study of stars and their mass–luminosity relation. Lesson 9 - Stellar Births The study of stellar evolution is presented by examining the birth of stars. Different types of nebulae are introduced and the necessary ingredients to produce a star: dust, gas, gravity, and maybe a littl ...
... important for the study of stars and their mass–luminosity relation. Lesson 9 - Stellar Births The study of stellar evolution is presented by examining the birth of stars. Different types of nebulae are introduced and the necessary ingredients to produce a star: dust, gas, gravity, and maybe a littl ...
arXiv:1505.07406v1 [hep-ph] 27 May 2015
... The great expectation we have of a quantum theory of gravity is that it will be able to tame the singularities arising in General Relativity. In particular, it should provide us with a consistent, non-singular scenario for the initial stages of our universe. It is hoped that this goal can be achieve ...
... The great expectation we have of a quantum theory of gravity is that it will be able to tame the singularities arising in General Relativity. In particular, it should provide us with a consistent, non-singular scenario for the initial stages of our universe. It is hoped that this goal can be achieve ...
ch19
... We are located in the disk of our galaxy and this is why the disk appears as a band of stars across the sky. Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appea ...
... We are located in the disk of our galaxy and this is why the disk appears as a band of stars across the sky. Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appea ...
Joint formation of QSOs and spheroids: QSOs as clocks of star
... are possibly higher in more luminous QSOs (Hamann & Ferland 1993, 1999). This is reminiscent of the mass – metallicity relationship in the local ellipticals, and can be naturally explained by taking into account the correlation between QSOs and host galaxy luminosities expected on the basis the obse ...
... are possibly higher in more luminous QSOs (Hamann & Ferland 1993, 1999). This is reminiscent of the mass – metallicity relationship in the local ellipticals, and can be naturally explained by taking into account the correlation between QSOs and host galaxy luminosities expected on the basis the obse ...
Emission from dust in galaxies: Metallicity dependence
... a random-walk process of photons. Next, we define an optical depth of dust grains for Lyα photons over the length of lpath as τdust . It is estimated as τdust ∼ πa2 lpath ndust , where a is the size of grains and ndust is their number density. Here, we will discuss whether the Lyα photons have a cha ...
... a random-walk process of photons. Next, we define an optical depth of dust grains for Lyα photons over the length of lpath as τdust . It is estimated as τdust ∼ πa2 lpath ndust , where a is the size of grains and ndust is their number density. Here, we will discuss whether the Lyα photons have a cha ...
In 1929, the astronomer Edwin Hubble observed that the light from
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
The Milky Way Model - University of Chicago
... entire universe or was it just one of many “island universes” located within a much greater system? Eventually a famous astronomer, Edwin Hubble was able to use a powerful telescope to resolve the stars in these spiral nebulae - ending the debate - and measure the great distances to them using Cephe ...
... entire universe or was it just one of many “island universes” located within a much greater system? Eventually a famous astronomer, Edwin Hubble was able to use a powerful telescope to resolve the stars in these spiral nebulae - ending the debate - and measure the great distances to them using Cephe ...
argo and other tidal structures around the milky way
... sample was limited to −25◦ < b < +25◦ , in order to avoid the Magellanic Clouds. The solar position is X = −8 kpc, Y = 0 kpc. A number of known structures can be seen in these plots: The Monoceros stream, Sagittarius, the TriAnd and Perseus systems (Rocha-Pinto et al. 2004). The large southern hemis ...
... sample was limited to −25◦ < b < +25◦ , in order to avoid the Magellanic Clouds. The solar position is X = −8 kpc, Y = 0 kpc. A number of known structures can be seen in these plots: The Monoceros stream, Sagittarius, the TriAnd and Perseus systems (Rocha-Pinto et al. 2004). The large southern hemis ...
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of the photo sphere. Come towards us and go away from us. So we can measure stellar temperatures using colors or spectroscopy. We can measure velocity of the pulsating photosphere using spectroscopy ...
... therefore, luminosity must change. If we observe stars spectroscopically, we can observe the velocity of the photo sphere. Come towards us and go away from us. So we can measure stellar temperatures using colors or spectroscopy. We can measure velocity of the pulsating photosphere using spectroscopy ...
Galaxies
... • Most distant supernovas are dimmer then expected (2011 Nobel Prize) • Shows rate of expansion of Universe is increasing • “Dark energy” used to explain, though no one quite knows what this is PHYS 162 Lecture 13a ...
... • Most distant supernovas are dimmer then expected (2011 Nobel Prize) • Shows rate of expansion of Universe is increasing • “Dark energy” used to explain, though no one quite knows what this is PHYS 162 Lecture 13a ...
The Origin and Evolution of Dust in Galaxies
... around stars is affected not only by the metallicities of the parent galaxies but also by elements formed inside stars, in particular, carbon Amorphous carbon, PAHs ...
... around stars is affected not only by the metallicities of the parent galaxies but also by elements formed inside stars, in particular, carbon Amorphous carbon, PAHs ...
Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally ""milky"", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few thousand (103) stars to giants with one hundred trillion (1014) stars, each orbiting their galaxy's own center of mass. Galaxies are categorized according to their visual morphology, including elliptical, spiral, and irregular. Many galaxies are thought to have black holes at their active centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than our own Sun. As of July 2015, EGSY8p7 is the oldest and most distant galaxy with a light travel distance of 13.2 billion light-years from Earth, and observed as it existed 570 million years after the Big Bang. Previously, as of May 2015, EGS-zs8-1 was the most distant known galaxy, estimated to have a light travel distance of 13.1 billion light-years away and to have 15% of the mass of the Milky Way.Approximately 170 billion (1.7 × 1011) to 200 billion (2.0 × 1011) galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs (or megaparsecs). The space between galaxies is filled with a tenuous gas with an average density less than one atom per cubic meter. The majority of galaxies are gravitationally organized into associations known as galaxy groups, clusters, and superclusters. At the largest scale, these associations are generally arranged into sheets and filaments that are surrounded by immense voids.