review
... amount of matter and energy in the universe. If the matter has a density equal to the critical density W0 = 8x10-27 kg/m3 at present, then we would expect the universe to coast to zero expansion velocity in future. If less, universe expands forever; if more, universe recollapses to a big crunch. Pre ...
... amount of matter and energy in the universe. If the matter has a density equal to the critical density W0 = 8x10-27 kg/m3 at present, then we would expect the universe to coast to zero expansion velocity in future. If less, universe expands forever; if more, universe recollapses to a big crunch. Pre ...
PS #1 Solutions - Stars and Stellar Explosions 1. Opacity sources
... to Thompson scattering. We will carry out many related estimates during this course so it is important to become familiar with this process. Consider a star in hydrostatic equilibrium in which energy transport is by radiative diffusion. The star is composed of ionized hydrogen and is supported prima ...
... to Thompson scattering. We will carry out many related estimates during this course so it is important to become familiar with this process. Consider a star in hydrostatic equilibrium in which energy transport is by radiative diffusion. The star is composed of ionized hydrogen and is supported prima ...
9. Lectures on Star Formation.
... -The star’s mass remains largely constant. Stellar object has become visible in optical and near-infrared light. -Accretion is ongoing but at a much lower rate. -After about 5 million years from the start, the disk is mostly gone, and the Jovian planets can be formed. During this phase star can be p ...
... -The star’s mass remains largely constant. Stellar object has become visible in optical and near-infrared light. -Accretion is ongoing but at a much lower rate. -After about 5 million years from the start, the disk is mostly gone, and the Jovian planets can be formed. During this phase star can be p ...
Sample exam 2
... 1. Give a full bibliographic citation of one of the references you will be using on your poster. At a minimum, the citation should contain the names of the author(s), the title of the work or URL, and the publication date. 2. State “similar” or “different” when comparing a neutron with a proton. a. ...
... 1. Give a full bibliographic citation of one of the references you will be using on your poster. At a minimum, the citation should contain the names of the author(s), the title of the work or URL, and the publication date. 2. State “similar” or “different” when comparing a neutron with a proton. a. ...
Star formation Stars form out of dense, cold, often dusty, molecular
... and tends to blow away the gas… Most stars today probably form in environments similar to this. ...
... and tends to blow away the gas… Most stars today probably form in environments similar to this. ...
The Big Four:
... • Effects on matter/light outside the horizon – gravitational attraction of other bodies – “dark star” with mass 3M Sun • distinguish from normal star, white dwarf, neutron star ...
... • Effects on matter/light outside the horizon – gravitational attraction of other bodies – “dark star” with mass 3M Sun • distinguish from normal star, white dwarf, neutron star ...
Star
... Long range forces can exert influence outside Event Horizon 1. Gravity 2. Electric Force ...
... Long range forces can exert influence outside Event Horizon 1. Gravity 2. Electric Force ...
Astronomy Chapter 16 – The Milky Way Galaxy A. Main Ideas 1
... ⇒ Interstellar gas is the material from which stars form, and it is the repository (storage place) of matter blown off dying stars 5. Motion of Stars and Gas in the Milky Way Although all stars within the Milky Way move around its center, the paths followed by stars in the disk and halo are very dif ...
... ⇒ Interstellar gas is the material from which stars form, and it is the repository (storage place) of matter blown off dying stars 5. Motion of Stars and Gas in the Milky Way Although all stars within the Milky Way move around its center, the paths followed by stars in the disk and halo are very dif ...
Seyfert Galaxies - Otterbein University
... • there are ~ 100 billion galaxies in the observable Universe • measure distances to other galaxies using the periodluminosity relationship for Cepheid variables • Type I supernovae also used to measure distances – Predictable luminosity – a standard candle ...
... • there are ~ 100 billion galaxies in the observable Universe • measure distances to other galaxies using the periodluminosity relationship for Cepheid variables • Type I supernovae also used to measure distances – Predictable luminosity – a standard candle ...
PowerPoint Presentation - 21. Galaxy Evolution
... • With such a fast rate of star formation, the galaxy will use up its gas.. • in only a few 100 million years • starburst phase is temporary in light of fact that galaxy is billions of years old © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
... • With such a fast rate of star formation, the galaxy will use up its gas.. • in only a few 100 million years • starburst phase is temporary in light of fact that galaxy is billions of years old © 2004 Pearson Education Inc., publishing as Addison-Wesley ...
September Evening Skies
... Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dipper is easily detected. Much more difficult is the double star near Vega in Lyra. ...
... Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dipper is easily detected. Much more difficult is the double star near Vega in Lyra. ...
Hubble`s Law is the relation between the recession velocity of a
... In the spiral arms of galaxies, we see bright, blue, highly luminous O and B stars. Since these stars have very short lifetimes, we know that they can not have moved far from where they were born. We also see, strung out like beads along the arms, regions of ionized hydrogen, which are lit up from t ...
... In the spiral arms of galaxies, we see bright, blue, highly luminous O and B stars. Since these stars have very short lifetimes, we know that they can not have moved far from where they were born. We also see, strung out like beads along the arms, regions of ionized hydrogen, which are lit up from t ...
Star Formation Efficiency VS Environment
... Log HIPASS Peak Flux Vs Optical Apparent Magnitude for objects matched by velocities from NED and 6dF, educated guesses without velocity match and velocity matches where multiple galaxies match. ...
... Log HIPASS Peak Flux Vs Optical Apparent Magnitude for objects matched by velocities from NED and 6dF, educated guesses without velocity match and velocity matches where multiple galaxies match. ...
From ATLASGAL to SEDIGISM: Towards a Complete 3D View of the
... H II regions and MYSOs to the expected cluster luminosity, we find they are underluminous, indicating that the lower mass companions have yet to form and suggesting a scenario where the high mass stars in a cluster form first. Extended emission As a blind survey, ATLASGAL provides a unique dataset f ...
... H II regions and MYSOs to the expected cluster luminosity, we find they are underluminous, indicating that the lower mass companions have yet to form and suggesting a scenario where the high mass stars in a cluster form first. Extended emission As a blind survey, ATLASGAL provides a unique dataset f ...
Document
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
Astronomers Demonstrate the Global Internet Telescope
... (JIVE) in the Netherlands, where the 9 Terabits of data were fed in real-time into a specialised supercomputer, called a 'correlator', and combined. The same research networks were then used to deliver the final data product directly to the astronomers who formed the images. Until the network infras ...
... (JIVE) in the Netherlands, where the 9 Terabits of data were fed in real-time into a specialised supercomputer, called a 'correlator', and combined. The same research networks were then used to deliver the final data product directly to the astronomers who formed the images. Until the network infras ...
Lecture 7 Stars and Galaxies and Nebula, (Oh My!) Feb 18 2003
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
Ch16_MilkyWayGalaxy
... violently disturbed the center in the not-to-distant past • Deep within the core lies an incredibly small (10 AU diameter) radio source known as Sgr A* • A 5 ×106 M black hole may occupy the very center of the galaxy! ...
... violently disturbed the center in the not-to-distant past • Deep within the core lies an incredibly small (10 AU diameter) radio source known as Sgr A* • A 5 ×106 M black hole may occupy the very center of the galaxy! ...
Astronomy 10B List of Concepts– by Chapter
... • Cosmic Background radiation (CBR)? o Who discovered o Observed in which band? o When we look at the CBR, we see remains from o The CBR spectrum corresponds to which temperature? o The small variations in the CBR match what distribution? • GUT’s o Forces unify at temperatures o Which forces were un ...
... • Cosmic Background radiation (CBR)? o Who discovered o Observed in which band? o When we look at the CBR, we see remains from o The CBR spectrum corresponds to which temperature? o The small variations in the CBR match what distribution? • GUT’s o Forces unify at temperatures o Which forces were un ...
Open Problems - Lorentz Center
... • Lots of data out there: – Observers have quantified how satellite properties depend on • stellar mass • halo mass • redshift ...
... • Lots of data out there: – Observers have quantified how satellite properties depend on • stellar mass • halo mass • redshift ...
Interstellar clouds
... 9% Helium, and 1% dust grains. • It has an extremely low density of 1 atom per cm3, about 10 billionth the density of gas created by our best vacuums here on earth. ...
... 9% Helium, and 1% dust grains. • It has an extremely low density of 1 atom per cm3, about 10 billionth the density of gas created by our best vacuums here on earth. ...
Chapter 15
... • These population III stars may not be observable for three reasons – Only short-lived massive population III stars can form – consequently none are left today – Population III stars exist, but are masquerading as Pop II since their atmospheres have been contaminated by gas ejected when a more mass ...
... • These population III stars may not be observable for three reasons – Only short-lived massive population III stars can form – consequently none are left today – Population III stars exist, but are masquerading as Pop II since their atmospheres have been contaminated by gas ejected when a more mass ...
Stellar Formation 1) Solar Wind/Sunspots 2) Interstellar Medium 3) Protostars
... starts off very large (100s x radius of our Sun) ...
... starts off very large (100s x radius of our Sun) ...
Where do Stars Form ?
... Disks of matter accreted onto the protostar (“accretion disks”) often lead to the formation of jets (directed outflows; bipolar outflows): Herbig Haro Objects ...
... Disks of matter accreted onto the protostar (“accretion disks”) often lead to the formation of jets (directed outflows; bipolar outflows): Herbig Haro Objects ...