Nova
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...
Distance measures - ScienceEducationatNewPaltz
... move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you will see that the greatest baseline ground-based astronomers can obtain is by observing the star at ...
... move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you will see that the greatest baseline ground-based astronomers can obtain is by observing the star at ...
A Unique Environmental Studies Program
... Sack". This is a cloud of very dark dust or gas and even though there may be stars behind it, their light cannot shine through. The Clouds of Magellan. These clouds were first described by the explorer Magellan, and they are actually two satellites of our own Milky Way galaxy. These clouds are easil ...
... Sack". This is a cloud of very dark dust or gas and even though there may be stars behind it, their light cannot shine through. The Clouds of Magellan. These clouds were first described by the explorer Magellan, and they are actually two satellites of our own Milky Way galaxy. These clouds are easil ...
UNIT 4 - Galaxies XIV. The Milky Way A. Structure
... Interstellar gas and dust prevent observations of stars to great distances within the galaxy radio telescopes (long wavelengths) can "see" through the dust and allow astronomers to map the distribution of gas and dust in the galaxy - Milky Way has a spiral structure Spiral arms contain gas and dust ...
... Interstellar gas and dust prevent observations of stars to great distances within the galaxy radio telescopes (long wavelengths) can "see" through the dust and allow astronomers to map the distribution of gas and dust in the galaxy - Milky Way has a spiral structure Spiral arms contain gas and dust ...
Young Galaxies Grow - Astronomical Society of the Pacific
... • Spiral galaxies form from a spinning disk of matter. Their brightest component is a flat, dense disk, where most of their stars are formed along spiral arms. Our Milky Way is a spiral galaxy, • Such disk galaxies assembled mostly in earlier epochs, but they continue to form stars today from rema ...
... • Spiral galaxies form from a spinning disk of matter. Their brightest component is a flat, dense disk, where most of their stars are formed along spiral arms. Our Milky Way is a spiral galaxy, • Such disk galaxies assembled mostly in earlier epochs, but they continue to form stars today from rema ...
100 million years after the Big Bang
... • assembly of galaxy mass as a function of look-back time • Pair production SNe (massive stars) at MK = -23 • Young globular clusters with 106 year free fall times and M/L ...
... • assembly of galaxy mass as a function of look-back time • Pair production SNe (massive stars) at MK = -23 • Young globular clusters with 106 year free fall times and M/L ...
Standard EPS Shell Presentation
... temperature of the stars on the x-axis and the absolute brightness on the y-axis. ...
... temperature of the stars on the x-axis and the absolute brightness on the y-axis. ...
Sin título de diapositiva - Universitat de Barcelona
... The GAIA mission, the next ESA Cornerstone 6 (launch 2010- 2012), will create a precise three dimensional map of about one billion stars throughout our Galaxy and beyond. To reach the scientific goals, that is to quantify the dynamical, chemical and star formation evolution of the Milky Way, it is c ...
... The GAIA mission, the next ESA Cornerstone 6 (launch 2010- 2012), will create a precise three dimensional map of about one billion stars throughout our Galaxy and beyond. To reach the scientific goals, that is to quantify the dynamical, chemical and star formation evolution of the Milky Way, it is c ...
Dark Matter -24-------------------------------~-----------R-E-S-O-N-A-N-C
... implication of a flat rotation curve was simple but profoundly puzzling: surrounding the disk of stars there must be another distribution of matter that emits no light, i.e. dark matter. This seemed so farfetched at that time that astronomers began looking more carefully at their assumptions and arg ...
... implication of a flat rotation curve was simple but profoundly puzzling: surrounding the disk of stars there must be another distribution of matter that emits no light, i.e. dark matter. This seemed so farfetched at that time that astronomers began looking more carefully at their assumptions and arg ...
BREATHING IN LOW MASS GALAXIES: A STUDY - N
... To simulate the star formation history in dwarf galaxies, we created five example galaxies in hydrostatic equilibrium with Navarro et al. (1997) (hereafter NFW) density profiles. They vary in total mass from 109 M to 1010 M and have velocities at the virial radius (v200 ) of 10, 15, 20, 25, and 30 ...
... To simulate the star formation history in dwarf galaxies, we created five example galaxies in hydrostatic equilibrium with Navarro et al. (1997) (hereafter NFW) density profiles. They vary in total mass from 109 M to 1010 M and have velocities at the virial radius (v200 ) of 10, 15, 20, 25, and 30 ...
the rest of the univ..
... Some believe that Triton, Pluto and its moon Charon are merely the largest examples of Kuiper Belt objects. But these are more than distant curiosities. They are almost certainly pristine remnants of the nebula from which the entire solar system was formed. Their composition and distribution places ...
... Some believe that Triton, Pluto and its moon Charon are merely the largest examples of Kuiper Belt objects. But these are more than distant curiosities. They are almost certainly pristine remnants of the nebula from which the entire solar system was formed. Their composition and distribution places ...
Dynamics of the Milky Way
... Collisionless Stellar Dynamics • Thus the time-scale over which collisions between stars in galaxies become important is long compared to the age of the Universe. • Stellar systems with this property can be described by a singleparticle distribution function in phase-space, whose evolution is gover ...
... Collisionless Stellar Dynamics • Thus the time-scale over which collisions between stars in galaxies become important is long compared to the age of the Universe. • Stellar systems with this property can be described by a singleparticle distribution function in phase-space, whose evolution is gover ...
slides - Indico
... studied at higher resolution to understand detailed predictions of nucleosynthesis models ...
... studied at higher resolution to understand detailed predictions of nucleosynthesis models ...
Driving downsizing with galaxy groups
... • Current modeling of environmental effects is wrong and this has consequences for predictions of the general field (which is dominated by groups) Simple strangulation models may still work well, if the instantaneous assumption is ...
... • Current modeling of environmental effects is wrong and this has consequences for predictions of the general field (which is dominated by groups) Simple strangulation models may still work well, if the instantaneous assumption is ...
Lecture 2
... Most galaxies are too far away to pick out their Cepheid variables. How do we measure distances to them? Using atomic spectra, Doppler shifts and the Hubble law. ...
... Most galaxies are too far away to pick out their Cepheid variables. How do we measure distances to them? Using atomic spectra, Doppler shifts and the Hubble law. ...
The Milky Way galaxy Contents Summary
... billions of stars. The smaller galaxies are much more numerous than the larger ones, but not by a sufficient factor to compensate for their lower luminosities. So most of the luminosity in the Universe is contributed by galaxies that lie just below the top of the scale. The Sun lies in just such a g ...
... billions of stars. The smaller galaxies are much more numerous than the larger ones, but not by a sufficient factor to compensate for their lower luminosities. So most of the luminosity in the Universe is contributed by galaxies that lie just below the top of the scale. The Sun lies in just such a g ...
a kiloparsec-scale nuclear stellar disk in the milky way
... forming a stellar nuclear disk (Cole et al. 2014), to derive the kinematic signatures of such a disk. We use these to guide our interpretation of the APOGEE Data Release 12 (Alam et al. 2015) stellar velocity data for the inner MW. While the simulation was not designed to match the MW, Cole et al. ( ...
... forming a stellar nuclear disk (Cole et al. 2014), to derive the kinematic signatures of such a disk. We use these to guide our interpretation of the APOGEE Data Release 12 (Alam et al. 2015) stellar velocity data for the inner MW. While the simulation was not designed to match the MW, Cole et al. ( ...
PROBLEM SET #9 SOLUTIONS AST142 1. Quasar luminosity
... is accreting at the Eddington rate, and show that these two findings are consistent with one another. ...
... is accreting at the Eddington rate, and show that these two findings are consistent with one another. ...
ASTR 220 Homework #7 Solutions
... 100,000 light-years across. Even if we could send out a probe that traveled at the speed of light, it would take thousands of years for it to get far enough away to see the whole galaxy at once. We have no pictures of the Milky Way from the “outside”. 9. Ch. 14, Sensible Statements, #24. This statem ...
... 100,000 light-years across. Even if we could send out a probe that traveled at the speed of light, it would take thousands of years for it to get far enough away to see the whole galaxy at once. We have no pictures of the Milky Way from the “outside”. 9. Ch. 14, Sensible Statements, #24. This statem ...
Star Birth
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
... • Without CO molecules to provide cooling, the clouds that formed the first stars had to be considerably warmer than today’s molecular clouds • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure ...
Chapter 28 powerpoint presentation
... Quasars are observed only at high redshifts – at large lookback times, so they existed in the distant past. There are no nearby quasars. The lower luminosity AGN’s, the Seyfert and starburst galaxies, bridge the gap between us and the more distant quasars ...
... Quasars are observed only at high redshifts – at large lookback times, so they existed in the distant past. There are no nearby quasars. The lower luminosity AGN’s, the Seyfert and starburst galaxies, bridge the gap between us and the more distant quasars ...
Presentazione di PowerPoint
... laboratory of N-body simulations. The basic collisionless collapse in a variety of N-body mechanisms have been modeled long ago by simulations [1]. To our knowledge, this is the first Chandrasekhar (1943), but are not understood under time that an analytically simple model constructed realistic cond ...
... laboratory of N-body simulations. The basic collisionless collapse in a variety of N-body mechanisms have been modeled long ago by simulations [1]. To our knowledge, this is the first Chandrasekhar (1943), but are not understood under time that an analytically simple model constructed realistic cond ...