The Intricate Role of Cold Gas and Dust in Galaxy Evolution at Early
... - idea: z>4 galaxy dust spectral energy distributions peak beyond 500 µm! ! can use (sub)mm colors to determine reasonable photometric redshifts! ! “red” sources are strong candidates for starbursts at the earliest epochs Systematic approach, but…how well does it work?! ...
... - idea: z>4 galaxy dust spectral energy distributions peak beyond 500 µm! ! can use (sub)mm colors to determine reasonable photometric redshifts! ! “red” sources are strong candidates for starbursts at the earliest epochs Systematic approach, but…how well does it work?! ...
ALMA_BoJun605_Gruppioni
... • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher background levels for CO excitation. • Diffe ...
... • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher background levels for CO excitation. • Diffe ...
Chapter 15, Galaxies
... they much further away from us than the stars? • Before the 1920s, there were no reliable methods of measuring the distance to the galaxies. Many people believed that the galaxies were located within the Milky Way… How do we measure the distance of objects far away in the universe, much farther than ...
... they much further away from us than the stars? • Before the 1920s, there were no reliable methods of measuring the distance to the galaxies. Many people believed that the galaxies were located within the Milky Way… How do we measure the distance of objects far away in the universe, much farther than ...
Nobel Prize in Physics 2002: Riccardo Giaconni
... Earth, as the atmosphere acts like an absorbing layer. It may sound strange since X-rays easily pass through our body (except the bones). Although the atmosphere is very tenuous compared to our body, the total thickness offered by it is much larger and X-rays suffer considerable absorption in it. Th ...
... Earth, as the atmosphere acts like an absorbing layer. It may sound strange since X-rays easily pass through our body (except the bones). Although the atmosphere is very tenuous compared to our body, the total thickness offered by it is much larger and X-rays suffer considerable absorption in it. Th ...
Beyond the Solar System By Patti Hutchison ANSWER THE
... the galaxies in the universe are spiral galaxies. A spiral galaxy looks like a twirling octopus. In the "arms" of the galaxy, new stars are formed. Some of them are very large. They cause the surrounding clouds of dust to glow brightly, also. Spiral galaxies are beautiful to see. New stars are not f ...
... the galaxies in the universe are spiral galaxies. A spiral galaxy looks like a twirling octopus. In the "arms" of the galaxy, new stars are formed. Some of them are very large. They cause the surrounding clouds of dust to glow brightly, also. Spiral galaxies are beautiful to see. New stars are not f ...
Determining Distances to Other Galaxies
... speed of ~100km/s. •Arm acts as gravitational well, slowing down the cloud. •Arm will alter orbits of gas/stars, causing them to move along arm ...
... speed of ~100km/s. •Arm acts as gravitational well, slowing down the cloud. •Arm will alter orbits of gas/stars, causing them to move along arm ...
“Breakthroughs” of the 20th Century
... the number of times that that breakthrough has been chosen, and the results are then listed in order, giving List 2. Both lists indicate that galaxies win clearly. The top two places in both lists go to the discovery that the Universe actually contains a huge number of galaxies, as opposed to just t ...
... the number of times that that breakthrough has been chosen, and the results are then listed in order, giving List 2. Both lists indicate that galaxies win clearly. The top two places in both lists go to the discovery that the Universe actually contains a huge number of galaxies, as opposed to just t ...
Pre-Lab
... formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the foreground stars of the Galaxy, they would be systems containing billions of stars. Kant's specul ...
... formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the foreground stars of the Galaxy, they would be systems containing billions of stars. Kant's specul ...
5th_state_of_matter - the Electric Universe!
... similarly transformed to vapour at 100°C (Fig.1). Much stronger zig-zag motion of the particles separates and ionises hydrogen and oxygen i.e. plasma comes into existence (above 13 000 K). Do all bodies fit one of these four states of matter even when strongly heated ? This year, the solar corona-pr ...
... similarly transformed to vapour at 100°C (Fig.1). Much stronger zig-zag motion of the particles separates and ionises hydrogen and oxygen i.e. plasma comes into existence (above 13 000 K). Do all bodies fit one of these four states of matter even when strongly heated ? This year, the solar corona-pr ...
Galaxy alignment within dark matter halos
... study of alignment dependence on galaxy color. AGN feedback are very important for the study of galaxy alignment dependence on color. The prediction of alignment from simulations are in good agreement with observations, indicating the theory of cosmic structure formation is correct for the spati ...
... study of alignment dependence on galaxy color. AGN feedback are very important for the study of galaxy alignment dependence on color. The prediction of alignment from simulations are in good agreement with observations, indicating the theory of cosmic structure formation is correct for the spati ...
14.1 Introduction - University of Cambridge
... particles in the box with that particular wave function. For bosons (e.g. photons), f (p) is unrestricted. But fermions (such as electrons with spin angular momentum h̄/2) obey Pauli exclusion principle, which states that: f (p) ≤ 1 . This criterion immediately imposes a restriction on how dense an ...
... particles in the box with that particular wave function. For bosons (e.g. photons), f (p) is unrestricted. But fermions (such as electrons with spin angular momentum h̄/2) obey Pauli exclusion principle, which states that: f (p) ≤ 1 . This criterion immediately imposes a restriction on how dense an ...
Galaxies
... call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Great Nebula in Andromeda” (M 31, at right) and found ...
... call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Great Nebula in Andromeda” (M 31, at right) and found ...
Stars and Galaxies
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
ASTR-264-Lecture
... Stars-a large, glowing ball of gas that generate heat and light through nuclear fusion Planet- a moderately large object that orbits a star; it shines by reflected light. Planets may be rockey, ice, or gaseous in composition. Moon (or satalite)- an object that orbits a planet note that terms Moons a ...
... Stars-a large, glowing ball of gas that generate heat and light through nuclear fusion Planet- a moderately large object that orbits a star; it shines by reflected light. Planets may be rockey, ice, or gaseous in composition. Moon (or satalite)- an object that orbits a planet note that terms Moons a ...
Stars and Galaxies
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
... The Big Bang theory predicts that these light elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. ...
hubble_refurb
... The Hubble Space Telescope’s newly repaired Advanced Camera for Surveys (ACS) has peered nearly 5 billion light years away to resolve intricate details in the galaxy cluster Abell 370. Abell 370 is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lens ...
... The Hubble Space Telescope’s newly repaired Advanced Camera for Surveys (ACS) has peered nearly 5 billion light years away to resolve intricate details in the galaxy cluster Abell 370. Abell 370 is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lens ...
An Ancient Universe
... Over a hundred of these stars are now known to have planets, just the way the Sun does. Some stars show evidence of being much older than the Sun, and some are just gathering together from the raw material of the galaxy. One of the nicest things about the universe is that it sends its information to ...
... Over a hundred of these stars are now known to have planets, just the way the Sun does. Some stars show evidence of being much older than the Sun, and some are just gathering together from the raw material of the galaxy. One of the nicest things about the universe is that it sends its information to ...
Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.