5X_Measuring_galaxy_redshifts
... wavelength’, such that the Doppler shift is the same for all channels. Largescale variations are then filtered out (i.e. only spectral lines left). The spectrum is then ‘slid’ against a template prepared from a known bright galaxy or star, and a correlation function derived. The peaks in the functio ...
... wavelength’, such that the Doppler shift is the same for all channels. Largescale variations are then filtered out (i.e. only spectral lines left). The spectrum is then ‘slid’ against a template prepared from a known bright galaxy or star, and a correlation function derived. The peaks in the functio ...
Steps
... StePS will carry out a detailed analysis of: Stellar ages and metallicities Stellar masses Star formation rates and histories Gas metallicities, electron density, ionization parameter Dust attenuation Stellar velocity dispersion Gas kinematics Galaxy dynamical masses Gas outflows ...
... StePS will carry out a detailed analysis of: Stellar ages and metallicities Stellar masses Star formation rates and histories Gas metallicities, electron density, ionization parameter Dust attenuation Stellar velocity dispersion Gas kinematics Galaxy dynamical masses Gas outflows ...
Integrative Studies 410 Our Place in the Universe
... • After correcting for absorption by dust, it is possible to plot location of O- and B- (hot young stars) which tend to be concentrated in the spiral arms • Radio frequency observations reveal the distribution of hydrogen (atomic) and molecular clouds ...
... • After correcting for absorption by dust, it is possible to plot location of O- and B- (hot young stars) which tend to be concentrated in the spiral arms • Radio frequency observations reveal the distribution of hydrogen (atomic) and molecular clouds ...
Basics of chemical evolution
... Chemical evolution • The metal abundance of the gas, and of subsequent generations of stars, should increase in time. – if there is no gas infall from the outside ...
... Chemical evolution • The metal abundance of the gas, and of subsequent generations of stars, should increase in time. – if there is no gas infall from the outside ...
Warm gas in protoplanetary disks van der Plas, G. - UvA-DARE
... Planets are a by-product of star formation. A star forms as the result of the collapse of a large gas and dust cloud under its own gravity. As the cloud contracts, it starts spinning faster and faster, much like a figure skater making a pirouette whose spin-rate increases as he draws his arms closer ...
... Planets are a by-product of star formation. A star forms as the result of the collapse of a large gas and dust cloud under its own gravity. As the cloud contracts, it starts spinning faster and faster, much like a figure skater making a pirouette whose spin-rate increases as he draws his arms closer ...
The radial scale length of the Milky Way
... by choosing the most appropriate conditions for this task. This value is similar to typical values for other galaxies (de Grijs and van der Kruit, 1996; Peletier et al., 1994; de Jong, 1996). This value seems quite low when compared with the obtained values in the optical (see for instance van der K ...
... by choosing the most appropriate conditions for this task. This value is similar to typical values for other galaxies (de Grijs and van der Kruit, 1996; Peletier et al., 1994; de Jong, 1996). This value seems quite low when compared with the obtained values in the optical (see for instance van der K ...
AGN-Hubble
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
the star
... Such galaxies are oval in shape, have no discernible spiral structure, and little gas or dust. Reddish in color. Very few new stars being born. Elliptical galaxies come in all sizes from just a little larger than globular clusters to 10 times the mass of the Milky Way. The most common kind of galaxy ...
... Such galaxies are oval in shape, have no discernible spiral structure, and little gas or dust. Reddish in color. Very few new stars being born. Elliptical galaxies come in all sizes from just a little larger than globular clusters to 10 times the mass of the Milky Way. The most common kind of galaxy ...
Summary of recent research activities
... In the last couple of years I’ve been working on a few projects as PI, and at the same time I’ve continued collaborating with my expertise to other projects that were born in my pre-ESO years. Due to the limited space, it would not be possible to illustrate here all these research lines, so only som ...
... In the last couple of years I’ve been working on a few projects as PI, and at the same time I’ve continued collaborating with my expertise to other projects that were born in my pre-ESO years. Due to the limited space, it would not be possible to illustrate here all these research lines, so only som ...
OGT TYPE QUESTIONS
... years. The half-life of potassium-40 is 1.3 billion years. The half life of carbon-14 is 5,730 years. Therefore, the carbon-14 method would be adequate to date an object that was around 20,000 years old. ...
... years. The half-life of potassium-40 is 1.3 billion years. The half life of carbon-14 is 5,730 years. Therefore, the carbon-14 method would be adequate to date an object that was around 20,000 years old. ...
Hands-On Radio Astronomy Mapping the Milky Way
... It took astronomers a long time to figure out what our Galaxy really looks like. One would like to be able to embark on a spaceship and see the Galaxy from outside. Unfortunately, traveling in and around the Galaxy is (and will always be) out of the question because of the huge distances. We are con ...
... It took astronomers a long time to figure out what our Galaxy really looks like. One would like to be able to embark on a spaceship and see the Galaxy from outside. Unfortunately, traveling in and around the Galaxy is (and will always be) out of the question because of the huge distances. We are con ...
R and FUV Observations of Star Formation in
... hot ICM. The gas at a few x107 K and ~25 K are related. This is consistent with gas cooling from the hot ICM to molecular gas and forming stars. This correlation is not destroyed, and possibly even maintained by heating? ...
... hot ICM. The gas at a few x107 K and ~25 K are related. This is consistent with gas cooling from the hot ICM to molecular gas and forming stars. This correlation is not destroyed, and possibly even maintained by heating? ...
Goals of the day Clickers Order of Magnitude Astronomy
... • Local group = several million light-years =106 ly • Observable universe = 14 billion light-years = 1.4 x 1010 ly ...
... • Local group = several million light-years =106 ly • Observable universe = 14 billion light-years = 1.4 x 1010 ly ...
Bildungskonzepte von Galaxien - uni
... supported by pressure, stars condensing out, falling toward centre to hot for stars to form From angular momenta observations: galaxy were not in its present state of equilibrium at the time of first star formation Rate of collapse: since there are highly eccentric orbits rapid collapse w.r. ...
... supported by pressure, stars condensing out, falling toward centre to hot for stars to form From angular momenta observations: galaxy were not in its present state of equilibrium at the time of first star formation Rate of collapse: since there are highly eccentric orbits rapid collapse w.r. ...
LIGO Star Chart
... Although Andromeda is so far away that it takes light almost 3 million years to reach us, the distance between the two galaxies is getting smaller. Andromeda is moving toward the Milky Way at about 700,000 miles per hour! The best explanation for this is that the Milky Way and Andromeda are in fact ...
... Although Andromeda is so far away that it takes light almost 3 million years to reach us, the distance between the two galaxies is getting smaller. Andromeda is moving toward the Milky Way at about 700,000 miles per hour! The best explanation for this is that the Milky Way and Andromeda are in fact ...
Galaxy Classification - VCI
... Spiral Galaxies Like our own Milky Way, all spiral galaxies have a nuclear bulge, and at least 2 spiral or propeller-shaped arms, with a halo of gas, dust, stars, and globular clusters. Spiral galaxies are classified as Sa, Sb, or Sc depending on the size of the nucleus & how tightly the arms are ...
... Spiral Galaxies Like our own Milky Way, all spiral galaxies have a nuclear bulge, and at least 2 spiral or propeller-shaped arms, with a halo of gas, dust, stars, and globular clusters. Spiral galaxies are classified as Sa, Sb, or Sc depending on the size of the nucleus & how tightly the arms are ...
Goals of the day Clickers Order of Magnitude Astronomy
... • Local group = several million light-years =106 ly • Observable universe = 14 billion light-years = 1.4 x 1010 ly ...
... • Local group = several million light-years =106 ly • Observable universe = 14 billion light-years = 1.4 x 1010 ly ...
Other Galaxies, their Distances, and the Expansion of the Universe
... Survey Question You see a car on the other side of the road coming towards you with their lights on. When the car is twice as close (that is, at half the original distance), how much brighter are the headlights? ...
... Survey Question You see a car on the other side of the road coming towards you with their lights on. When the car is twice as close (that is, at half the original distance), how much brighter are the headlights? ...
here
... measure the speed of light. His attempt involved two observers positioned in two towers that were about 10km apart. The idea was that the first observer opens a shutter in a lantern and then as soon as the second observer sees the light from the first lantern, opens his shutter. Galileo would then m ...
... measure the speed of light. His attempt involved two observers positioned in two towers that were about 10km apart. The idea was that the first observer opens a shutter in a lantern and then as soon as the second observer sees the light from the first lantern, opens his shutter. Galileo would then m ...
Review Quiz No. 22
... the iron core of a very massive star collapses to form a white dwarf. the iron core of a very massive star collapses to form a neutron star. the iron core of a very massive star collapses to form a black hole. a neutron star is tidally disrupted by a ...
... the iron core of a very massive star collapses to form a white dwarf. the iron core of a very massive star collapses to form a neutron star. the iron core of a very massive star collapses to form a black hole. a neutron star is tidally disrupted by a ...