![arXiv:1505.07406v1 [hep-ph] 27 May 2015](http://s1.studyres.com/store/data/007750137_1-1343a5635a0dda57ac4b2d01226e2ce5-300x300.png)
arXiv:1505.07406v1 [hep-ph] 27 May 2015
... corresponds to the situation in the early Universe, when the number densities of different particle species, e.g., dark matter (DM) particles and photons, are universally distributed in space. That picture, comfortably accomodated in the ΛCDM cosmology supplemented by the short stage of an inflation ...
... corresponds to the situation in the early Universe, when the number densities of different particle species, e.g., dark matter (DM) particles and photons, are universally distributed in space. That picture, comfortably accomodated in the ΛCDM cosmology supplemented by the short stage of an inflation ...
... The comet raises hopes, dashes them, raises them again and then wafts off into history as a “coulda been”. Proving once again- if such proof is needed- that comets are the contrariest of creatures, Comet ISON made its dash into the glare of the Sun- seemed to hesitate long enough for us to assume th ...
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... the distance indicators relevant to each other. And this is what's known as the distance ladder. Locally, those will be various stellar types of indicators, say, based on pulsating stars or star clusters and things like that, then properties of nearby galaxies, using their scaling relations and so o ...
... the distance indicators relevant to each other. And this is what's known as the distance ladder. Locally, those will be various stellar types of indicators, say, based on pulsating stars or star clusters and things like that, then properties of nearby galaxies, using their scaling relations and so o ...
Chapter 1 - Pearson Education
... Some galaxies are fairly isolated, but many others congregate in groups. Our Milky Way, for example, is one of the two largest galaxies among about 40 galaxies in the Local Group. Groups of galaxies with more than a few dozen members are often called galaxy clusters. Basic Astronomical Objects, Unit ...
... Some galaxies are fairly isolated, but many others congregate in groups. Our Milky Way, for example, is one of the two largest galaxies among about 40 galaxies in the Local Group. Groups of galaxies with more than a few dozen members are often called galaxy clusters. Basic Astronomical Objects, Unit ...
Full-text PDF
... supernovae produce winds which redistribute energy, mass and heavy elements over large regions (Heckman et al. 1990; Martin 1999). Even stronger feedback is possible, in principle, from AGN (Begelman et al. 1991). In both cases the determining processes occur on very small scales and so have to be i ...
... supernovae produce winds which redistribute energy, mass and heavy elements over large regions (Heckman et al. 1990; Martin 1999). Even stronger feedback is possible, in principle, from AGN (Begelman et al. 1991). In both cases the determining processes occur on very small scales and so have to be i ...
distance
... Velocities and Distances to Galaxies We know Hubble’s guess wasn’t quite right. Those brightest specs in other galaxies are really clusters of stars, much brighter than single stars. ...
... Velocities and Distances to Galaxies We know Hubble’s guess wasn’t quite right. Those brightest specs in other galaxies are really clusters of stars, much brighter than single stars. ...
The Jansky Very Large Array – New Capabilities, New Science
... • Three of the four prior examples employed mm (PdBI) interferometer observations as well as VLA. • The rise of ALMA will strengthen this complementarity, with stellar scientific results. • New example – Wagg and Carilli combine VLA and ALMA for early forming galaxies: – Massive galaxies at z~2 must ...
... • Three of the four prior examples employed mm (PdBI) interferometer observations as well as VLA. • The rise of ALMA will strengthen this complementarity, with stellar scientific results. • New example – Wagg and Carilli combine VLA and ALMA for early forming galaxies: – Massive galaxies at z~2 must ...
Astronomy 160: Frontiers and Controversies in Astrophysics
... m − M = 5 log 10pc m − 5 = 5 log 105 m − 5 = 25 So the apparent magnitude of Sun-like stars at a distance of 106 parsecs is 30. c) The magnitude of the full Moon is around -14.5. How much brighter does the Sun appear than the Moon? The apparent magnitude of the full moon is -14.5. So we can use the ...
... m − M = 5 log 10pc m − 5 = 5 log 105 m − 5 = 25 So the apparent magnitude of Sun-like stars at a distance of 106 parsecs is 30. c) The magnitude of the full Moon is around -14.5. How much brighter does the Sun appear than the Moon? The apparent magnitude of the full moon is -14.5. So we can use the ...
Chapter 15 Stars, Galaxies, and Universe
... •Star systems – two or more stars together •Binary stars – two stars or double stars •One star brighter, more massive •Dimmer star’s gravity causes “wobble” •Eclipsing binary – one star blocks light from another star •Triple stars – 3 stars together •Found at least 500 other planets that revolve aro ...
... •Star systems – two or more stars together •Binary stars – two stars or double stars •One star brighter, more massive •Dimmer star’s gravity causes “wobble” •Eclipsing binary – one star blocks light from another star •Triple stars – 3 stars together •Found at least 500 other planets that revolve aro ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or gas clouds against distance from the center of the galaxy. If most of the galaxy’s mass were concentrated toward the center, orbital speed would decline as distance from ...
... associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or gas clouds against distance from the center of the galaxy. If most of the galaxy’s mass were concentrated toward the center, orbital speed would decline as distance from ...
What are Messier Objects? - Bowling Green State University
... Throughout the night as the earth rotates our sky changes, and so does the sky where we stand. The information that continues is the results of a Messier marathon. How many Messier objects can you see in one night? The answer is you never know for sure. If you ask yourself that question everyday, yo ...
... Throughout the night as the earth rotates our sky changes, and so does the sky where we stand. The information that continues is the results of a Messier marathon. How many Messier objects can you see in one night? The answer is you never know for sure. If you ask yourself that question everyday, yo ...
The Gaseous Halo of NGC 891 Edmund Hodges-Kluck Joel Bregman
... galaxies (Bregman & Pildis 1994) • Giant HI halo (109 M) • Halo has exceptional data sets at multiple wavelengths • Active star formation (4 M/yr; ...
... galaxies (Bregman & Pildis 1994) • Giant HI halo (109 M) • Halo has exceptional data sets at multiple wavelengths • Active star formation (4 M/yr; ...
in search of antimatter in the universe
... assume that thermalisation occurs instantaneously.4,7 Spiral galaxies do not often feature AGN, and so instead, we consider elliptical galaxies, which have stars evenly distributed throughout the volume of an ellipse. One such galaxy is Centaurus A, which is the closest galaxy to us with an AGN jet, ...
... assume that thermalisation occurs instantaneously.4,7 Spiral galaxies do not often feature AGN, and so instead, we consider elliptical galaxies, which have stars evenly distributed throughout the volume of an ellipse. One such galaxy is Centaurus A, which is the closest galaxy to us with an AGN jet, ...
Joint formation of QSOs and spheroids: QSOs as clocks of star
... galaxies are thought to have formed. Hubble Space Telescope observations, especially the HDF surveys, and ground-based observations with the new 10-metre-class telescopes, have opened to direct investigation also the early phases of galaxy formation. Exploration of the local Universe is also yieldin ...
... galaxies are thought to have formed. Hubble Space Telescope observations, especially the HDF surveys, and ground-based observations with the new 10-metre-class telescopes, have opened to direct investigation also the early phases of galaxy formation. Exploration of the local Universe is also yieldin ...
Chapter 5 The Evolutionary Paths Of Nearby Galaxies
... still a matter of debate whether these results imply a physical connection between AGN activity and suppression of the star formation in galaxies (e.g. Westoby et al., 2007; Georgakakis et al., 2008). In addition, though AGN feedback has been directly observed in the giant ellipticals in the centre ...
... still a matter of debate whether these results imply a physical connection between AGN activity and suppression of the star formation in galaxies (e.g. Westoby et al., 2007; Georgakakis et al., 2008). In addition, though AGN feedback has been directly observed in the giant ellipticals in the centre ...
Galaxies
... • Origin, early history, and fate of the Universe • Does the Universe have a beginning? An end? What physics processes “caused” the Universe to be what it is? Are other universes possible? Would they look like ours (have the ...
... • Origin, early history, and fate of the Universe • Does the Universe have a beginning? An end? What physics processes “caused” the Universe to be what it is? Are other universes possible? Would they look like ours (have the ...
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 ...
The Hydrogen 21-cm Emission Line
... The mapping surveys show that the hydrogen gas is distributed in a spiral pattern in a thin disk for almost the entire Galaxy Finding the structure of the Milky Way is not an easy task because the solar system is stuck inside the Galaxy and we can only look in all different directions. Our situation ...
... The mapping surveys show that the hydrogen gas is distributed in a spiral pattern in a thin disk for almost the entire Galaxy Finding the structure of the Milky Way is not an easy task because the solar system is stuck inside the Galaxy and we can only look in all different directions. Our situation ...
The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL)
... The Messenger 141 – September 2010 ...
... The Messenger 141 – September 2010 ...
Molecular Gas in Galactic Environments Abstracts (Poster)
... A High Resolution, Unobscured View of the Active Regions in (Ultra) Luminous Infrared Galaxies from a VLA 33 GHz Survey I will present a new survey of 33 GHz radio continuum emission from local U/LIRGs carried out using the Karl G. Jansky Very Large Array (VLA). This is the first such survey and it ...
... A High Resolution, Unobscured View of the Active Regions in (Ultra) Luminous Infrared Galaxies from a VLA 33 GHz Survey I will present a new survey of 33 GHz radio continuum emission from local U/LIRGs carried out using the Karl G. Jansky Very Large Array (VLA). This is the first such survey and it ...
Emission from dust in galaxies: Metallicity dependence
... especially, we present the metallicity dependence of our conversion law between SFR and LIR . This is possible since both f and can be estimated via the dust-to-gas ratio, which is related to metallicity. We have confirmed that the relation between the metallicity and the dust-to-gas ratio is appl ...
... especially, we present the metallicity dependence of our conversion law between SFR and LIR . This is possible since both f and can be estimated via the dust-to-gas ratio, which is related to metallicity. We have confirmed that the relation between the metallicity and the dust-to-gas ratio is appl ...
spectral lines as distant measurement tools
... was one of the founders of astronomical spectral-line analysis, especially for the solar spectrum by using the solar telescope and spectrograph still present at Museum Sterrenwacht Sonnenborgh in Utrecht. He also spent much effort on developing astronomy courses. His book on practical work contains ...
... was one of the founders of astronomical spectral-line analysis, especially for the solar spectrum by using the solar telescope and spectrograph still present at Museum Sterrenwacht Sonnenborgh in Utrecht. He also spent much effort on developing astronomy courses. His book on practical work contains ...
Galaxy Zoo
![](https://commons.wikimedia.org/wiki/Special:FilePath/Galaxyzoo.jpg?width=300)
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.