Joint formation of QSOs and spheroids: QSOs as clocks of star
... Key words: dust, extinction – galaxies: formation – quasars: general – cosmology: theory – dark matter – infrared: galaxies. ...
... Key words: dust, extinction – galaxies: formation – quasars: general – cosmology: theory – dark matter – infrared: galaxies. ...
The role of black holes in galaxy formation and evolution
... contain plenty of cold gas, which forms stars, whereas the gas in ellipticals is too hot to form stars. Thus, ellipticals lack the young blue stars that are usually seen in spirals, and are generally quite red. Spirals also have central bulges structurally resembling miniature ellipticals. Owing to ...
... contain plenty of cold gas, which forms stars, whereas the gas in ellipticals is too hot to form stars. Thus, ellipticals lack the young blue stars that are usually seen in spirals, and are generally quite red. Spirals also have central bulges structurally resembling miniature ellipticals. Owing to ...
charts_set_9
... Halo: stars and globular clusters swarm around center of Milky Way. Very elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. ...
... Halo: stars and globular clusters swarm around center of Milky Way. Very elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. ...
A Chandra Observation of the Massive Star-Forming
... from an evaporating gaseous globule (EGG) for the first time A significant population of X-ray emitting low mass stars (~700) detected, increasing the cluster known members by a factor of 40 ...
... from an evaporating gaseous globule (EGG) for the first time A significant population of X-ray emitting low mass stars (~700) detected, increasing the cluster known members by a factor of 40 ...
Stars 3
... Nebula. These include wisp-like structures that move outward away from the pulsar at half the speed of light, as well as a mysterious “halo” which remains stationary, but grows brighter then fainter over time. Also seen are the effects of two polar jets that move out along the rotation axis of the p ...
... Nebula. These include wisp-like structures that move outward away from the pulsar at half the speed of light, as well as a mysterious “halo” which remains stationary, but grows brighter then fainter over time. Also seen are the effects of two polar jets that move out along the rotation axis of the p ...
the printable Observing Olympics Object Info Sheet in pdf
... NGC6572 – A very bright 8.1 magnitude Planetary Nebula, located in Ophiuchus and discovered in 1825 by Friedrich George Wilhelm Von Struve. Visually at low power it will appear as a colored star but higher magnification will reveal its disk. It has a very high surface brightness and some observers r ...
... NGC6572 – A very bright 8.1 magnitude Planetary Nebula, located in Ophiuchus and discovered in 1825 by Friedrich George Wilhelm Von Struve. Visually at low power it will appear as a colored star but higher magnification will reveal its disk. It has a very high surface brightness and some observers r ...
Molecular Gas in Galactic Environments Abstracts (Poster)
... have questioned this ingrained classification. Most notably, the ATLAS3D survey of 260 ETGs within ∼40 Mpc found that 22% contain CO, a common tracer for molecular gas. The presence of cold molecular gas also implies the possibility for current star formation within these galaxies. Simulations do no ...
... have questioned this ingrained classification. Most notably, the ATLAS3D survey of 260 ETGs within ∼40 Mpc found that 22% contain CO, a common tracer for molecular gas. The presence of cold molecular gas also implies the possibility for current star formation within these galaxies. Simulations do no ...
Peer-reviewed Article PDF - e
... necessary that the density of DM should permanently increase from the center to periphery curve halo, Figure 1. Unusual properties of DM follow from this fact: visible matter must be attracted to DM, while the latter is to repel the visible matter because the density of DM in galaxy center is minima ...
... necessary that the density of DM should permanently increase from the center to periphery curve halo, Figure 1. Unusual properties of DM follow from this fact: visible matter must be attracted to DM, while the latter is to repel the visible matter because the density of DM in galaxy center is minima ...
The Probability and Effects of an Asteroid Impact with Earth
... V filter relative to that for the dark-adapted eye. ...
... V filter relative to that for the dark-adapted eye. ...
Far-ultraviolet and far-infrared bivariate luminosity function of galaxies:
... related to the star formation in galaxies, but in a very complicated manner. In order to disentangle the relation between FUV and FIR emissions, we estimate the UV-IR bivariate LF (BLF) of galaxies with GALEX and AKARI All-Sky Survey datasets. Recently, we developed a new mathematical method to cons ...
... related to the star formation in galaxies, but in a very complicated manner. In order to disentangle the relation between FUV and FIR emissions, we estimate the UV-IR bivariate LF (BLF) of galaxies with GALEX and AKARI All-Sky Survey datasets. Recently, we developed a new mathematical method to cons ...
Test 4 Review Clicker Questions
... b) small irregular galaxies that orbit the Milky Way. c) large molecular clouds in the disk of our Galaxy. d) the brightest ionized hydrogen regions in our Galaxy. e) spiral nebulae originally discovered ...
... b) small irregular galaxies that orbit the Milky Way. c) large molecular clouds in the disk of our Galaxy. d) the brightest ionized hydrogen regions in our Galaxy. e) spiral nebulae originally discovered ...
Rhodri Evans - LA Flood Project
... call the “cosmic microwave background radiation”. This radiation was finally discovered in 1964, and since then advances in both theory and observations (such as the BICEP2 experiment mentioned above) now allow us to argue that we understand the physics of the Universe back to the briefest fraction ...
... call the “cosmic microwave background radiation”. This radiation was finally discovered in 1964, and since then advances in both theory and observations (such as the BICEP2 experiment mentioned above) now allow us to argue that we understand the physics of the Universe back to the briefest fraction ...
1 Research Experience for Cara Battersby I include very briefly here
... Jeremy Darling, Adam Ginsburg, Dr. Miranda Dunham and Dr. Steve Longmore – done while at the University of Colorado, Boulder. I have been working on this project off and on for the last two years, and will be submitting the first paper within the next month. This project involved extensive observati ...
... Jeremy Darling, Adam Ginsburg, Dr. Miranda Dunham and Dr. Steve Longmore – done while at the University of Colorado, Boulder. I have been working on this project off and on for the last two years, and will be submitting the first paper within the next month. This project involved extensive observati ...
スライド 1 - STScI
... shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma detection limit of the OGLE survey at I band, which is about 19.5 magnitude. Also, the left diagonal line shows the saturation limit of the OGLE surv ...
... shows the 10 sigma detection limit for our monitoring survey at K band, which is about 15.5 magnitude. The right diagonal line stands for the 10 sigma detection limit of the OGLE survey at I band, which is about 19.5 magnitude. Also, the left diagonal line shows the saturation limit of the OGLE surv ...
Tasks - ESA Science
... Observatories in Chile have presented ever deeper and more spectacular views of the Universe. However, Hubble and the ESO telescopes have not just provided stunning new images, they are also invaluable tools for astronomers. The telescopes have excellent spatial/angular resolution (image sharpness) ...
... Observatories in Chile have presented ever deeper and more spectacular views of the Universe. However, Hubble and the ESO telescopes have not just provided stunning new images, they are also invaluable tools for astronomers. The telescopes have excellent spatial/angular resolution (image sharpness) ...
W > 1 - The Open University
... Test your eyesight from a dark site by counting the number of naked eye stars that are visible. Seven should readily be seen. Keen vision will lead you into double figures. A test for moderate apertures is the nebulosity around some of the other brighter stars of the group, especially Merope. Nebula ...
... Test your eyesight from a dark site by counting the number of naked eye stars that are visible. Seven should readily be seen. Keen vision will lead you into double figures. A test for moderate apertures is the nebulosity around some of the other brighter stars of the group, especially Merope. Nebula ...
mslien~1
... From above the Jeans criterion can be derived as M c M J where the Jeans mass MJ is given by the RHS of ...
... From above the Jeans criterion can be derived as M c M J where the Jeans mass MJ is given by the RHS of ...
P1 topic 3 - WordPress.com
... Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By considering the evidence, discuss why one of these theories is preferred by most scientists. ...
... Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By considering the evidence, discuss why one of these theories is preferred by most scientists. ...
Recipes for ULX formation: necessary ingredients and garnishments
... Probably Yes. Models based on Bondi accretion from molecular clouds (Krolik 2005) cannot be ruled out in some cases, but are generally disfavoured by the low absorption seen in almost all ULX spectra (typically < 1021 cm−2 ) and low extinction in the surrounding stellar population. It is unlikely th ...
... Probably Yes. Models based on Bondi accretion from molecular clouds (Krolik 2005) cannot be ruled out in some cases, but are generally disfavoured by the low absorption seen in almost all ULX spectra (typically < 1021 cm−2 ) and low extinction in the surrounding stellar population. It is unlikely th ...
Presentazione di PowerPoint
... The detected maser spots have been fitted with two-dimensional elliptical Gaussians (intensities in the range: 0.3-17 Jy beam-1) A maser “feature” is considered real if it is detected in at least three contiguous channels (spectral FWHM > 0.3 km/s), with a position shift of the intensity peak from ...
... The detected maser spots have been fitted with two-dimensional elliptical Gaussians (intensities in the range: 0.3-17 Jy beam-1) A maser “feature” is considered real if it is detected in at least three contiguous channels (spectral FWHM > 0.3 km/s), with a position shift of the intensity peak from ...
Chapter 26: Stars, Galaxies, and the Universe Stars
... collapse shrinks the star's core to a white, glowing object about the size of Earth. A star at this point is called a white dwarf. Eventually, a white dwarf cools down and its light fades out. Supergiants and Supernovas A star that has much more mass than the Sun will end its life in a more dramatic ...
... collapse shrinks the star's core to a white, glowing object about the size of Earth. A star at this point is called a white dwarf. Eventually, a white dwarf cools down and its light fades out. Supergiants and Supernovas A star that has much more mass than the Sun will end its life in a more dramatic ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.