PPT
... per star by a global iterative method (>100 measures) Binary models fitted to systems with large residuals GAIA observations of quasars (known and new) put the astrometry on a quasi-inertial reference system ...
... per star by a global iterative method (>100 measures) Binary models fitted to systems with large residuals GAIA observations of quasars (known and new) put the astrometry on a quasi-inertial reference system ...
introduction to astronomy
... This course meets the lecture portion of the lab/science general studies requirement for graduation when taken with the lab course (AST 102). This course is provided for students who cannot take the lecture and lab during the same semester. The combination of AST 101-102 is equivalent to AST 103. ...
... This course meets the lecture portion of the lab/science general studies requirement for graduation when taken with the lab course (AST 102). This course is provided for students who cannot take the lecture and lab during the same semester. The combination of AST 101-102 is equivalent to AST 103. ...
Test 4 Review Clicker Questions
... c) the disk component started out thin and grew. d) spiral density waves formed first. e) the bar in the bulge formed first. ...
... c) the disk component started out thin and grew. d) spiral density waves formed first. e) the bar in the bulge formed first. ...
Quantitative constraints on starburst cycles in galaxies with stellar
... in this case, the SFR estimates have much larger errors, because dust extinction is not well constrained. The MPA/JHU catalogue does contain SFR estimates for AGN and galaxies where the Hα and/or [NII] lines are not detected. These estimates are derived using an empirical calibration between Dn (400 ...
... in this case, the SFR estimates have much larger errors, because dust extinction is not well constrained. The MPA/JHU catalogue does contain SFR estimates for AGN and galaxies where the Hα and/or [NII] lines are not detected. These estimates are derived using an empirical calibration between Dn (400 ...
Galaxies
... underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cools and collapses to form stars, and how the energy from star formation can feed back into the surrounding gas and regulate subsequent star formation. However, at a fundamental level we still lack a ...
... underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cools and collapses to form stars, and how the energy from star formation can feed back into the surrounding gas and regulate subsequent star formation. However, at a fundamental level we still lack a ...
Questions - Clever Teach
... though the candidate has described red-shift as a theory rather than an observation. In order to be in level three the candidate would have needed to explain that the red-shift is caused by the galaxies moving away from us and have written more detail about CMBR (for example that it is observed in a ...
... though the candidate has described red-shift as a theory rather than an observation. In order to be in level three the candidate would have needed to explain that the red-shift is caused by the galaxies moving away from us and have written more detail about CMBR (for example that it is observed in a ...
Gas fraction and star formation efficiency at z< 1.0
... z=1-2. At each epoch, there is a population of non-star-forming (quiescent) galaxies of high mass and high Sersic index. These galaxies might correspond to quenched galaxies and their average stellar mass increases with z. The starbursts at the top of the main sequence have a morphology intermediate ...
... z=1-2. At each epoch, there is a population of non-star-forming (quiescent) galaxies of high mass and high Sersic index. These galaxies might correspond to quenched galaxies and their average stellar mass increases with z. The starbursts at the top of the main sequence have a morphology intermediate ...
Chapter 14
... 14.1 Our Parent Galaxy From Earth, we see few stars when looking out of galaxy (red arrows), many when looking in (blue and ...
... 14.1 Our Parent Galaxy From Earth, we see few stars when looking out of galaxy (red arrows), many when looking in (blue and ...
Gas Mass Fractions and the Evolution of Spiral Galaxies
... content. We make no claim that these data are complete in any volume limited sense. For our present purposes, this is less important than having data representative of all morphological types, luminosities, etc. This is because we are more interested in the evolution of galaxies as physical systems ...
... content. We make no claim that these data are complete in any volume limited sense. For our present purposes, this is less important than having data representative of all morphological types, luminosities, etc. This is because we are more interested in the evolution of galaxies as physical systems ...
Worked Problem In a spherical galaxy, the density of matter varies
... up the disks of spiral galaxies. We will look at other kinds of orbits in our discussion of axisymmetric potentials later on. Meanwhile, let’s consider two special cases of orbits in spherially symmetric potentials. The Spherical harmonic oscillator Consider the spherically symmetric potential Φ(r) ...
... up the disks of spiral galaxies. We will look at other kinds of orbits in our discussion of axisymmetric potentials later on. Meanwhile, let’s consider two special cases of orbits in spherially symmetric potentials. The Spherical harmonic oscillator Consider the spherically symmetric potential Φ(r) ...
X. Nuclear star clusters in low-mass early-type galaxies
... At faint magnitudes, the dominant noise is a combination of the readnoise and the sky background noise with a small contribution of Poisson noise from the host galaxy (see also Section 4.3 and Fig. 6). For a host galaxy absolute magnitude MF814W = −13 mag, the difference between the host galaxy magn ...
... At faint magnitudes, the dominant noise is a combination of the readnoise and the sky background noise with a small contribution of Poisson noise from the host galaxy (see also Section 4.3 and Fig. 6). For a host galaxy absolute magnitude MF814W = −13 mag, the difference between the host galaxy magn ...
Astrophysics Questions (DRAFT)
... 94. Sketch a typical cooling function (T ) for di use interstellar gas and identify its prominent features. Overplot a hypothetical heating curve and show how to identify points of thermal equilibrium and their stability. 95. Explain the physics of 21 cm radio emission from neutral hydrogen atoms. ...
... 94. Sketch a typical cooling function (T ) for di use interstellar gas and identify its prominent features. Overplot a hypothetical heating curve and show how to identify points of thermal equilibrium and their stability. 95. Explain the physics of 21 cm radio emission from neutral hydrogen atoms. ...
Jul y 9- 11,
... X-ray constraints on the local SMBH occupation fraction Elena Gallo University of Michigan Models of black hole growth in the context of galaxy mergers indicate that central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnant ...
... X-ray constraints on the local SMBH occupation fraction Elena Gallo University of Michigan Models of black hole growth in the context of galaxy mergers indicate that central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnant ...
Archaeology of the Universe
... entire universe. A galaxy is an enormous cluster of stars about 100,000 light years large; galaxies are then grouped in even bigger clusters of galaxies (for example, COMA and Virgo), which form a complex, spongy structure that fills up the universe as far as the farthest distances that we can imagi ...
... entire universe. A galaxy is an enormous cluster of stars about 100,000 light years large; galaxies are then grouped in even bigger clusters of galaxies (for example, COMA and Virgo), which form a complex, spongy structure that fills up the universe as far as the farthest distances that we can imagi ...
GALEX and Star Formation
... where multiple stellar generations contribute significantly to the light (Fig.s 1 and 2). Finally, UV fluxes are more sensitive to dust, which plays a major role in star formation, as will be discussed in Section 2.3. Massive stars drive the chemical evolution of the Universe, enriching the interste ...
... where multiple stellar generations contribute significantly to the light (Fig.s 1 and 2). Finally, UV fluxes are more sensitive to dust, which plays a major role in star formation, as will be discussed in Section 2.3. Massive stars drive the chemical evolution of the Universe, enriching the interste ...
Cepheid Calibration
... stage of history. Such was the contribution of Henrietta Leavitt, one of many female “computers” working at the Harvard College Observatory for small hourly wages. Her years of patiently studying astronomical photographs—from 1893 until her death in 1921—culminated in finding the missing link for me ...
... stage of history. Such was the contribution of Henrietta Leavitt, one of many female “computers” working at the Harvard College Observatory for small hourly wages. Her years of patiently studying astronomical photographs—from 1893 until her death in 1921—culminated in finding the missing link for me ...
Radiation: The Key to Understanding the Universe
... comes in all wavelengths and astronomers use various kinds of telescopes and detectors to gather and analyze these photons. The optical and radio telescopes can be ground based while all others, e.g., the microwave, infrared, X-ray and gamma-ray telescopes have to be necessarily put in space aboard ...
... comes in all wavelengths and astronomers use various kinds of telescopes and detectors to gather and analyze these photons. The optical and radio telescopes can be ground based while all others, e.g., the microwave, infrared, X-ray and gamma-ray telescopes have to be necessarily put in space aboard ...
ch19
... Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appear dimmer. The key to finding our location in the galaxy is locating bright objects out of the plane of the ga ...
... Early attempts to locate our solar system produced erroneous results. The main problem was that interstellar extinction allows one to only see the nearby stars and makes distant objects appear dimmer. The key to finding our location in the galaxy is locating bright objects out of the plane of the ga ...
A Comet-Hunter`s Legacy -
... usually suggested that stars in each of the colliding galaxies would pass undisturbed, right through the other galaxy, because the stars were so infinitely small in comparison to the vast distances between them, that collisions or even near-collisions of stars would be rare or nonexistent. We now kn ...
... usually suggested that stars in each of the colliding galaxies would pass undisturbed, right through the other galaxy, because the stars were so infinitely small in comparison to the vast distances between them, that collisions or even near-collisions of stars would be rare or nonexistent. We now kn ...
Homework
... A newspaper article reported that astronomers claim people are made of stardust. What does this mean? Pick the answer that best matches what you think “being made of stardust” means. a. “Being made of stardust” is not intended to be taken literally. It means that nobody really knows where atoms come ...
... A newspaper article reported that astronomers claim people are made of stardust. What does this mean? Pick the answer that best matches what you think “being made of stardust” means. a. “Being made of stardust” is not intended to be taken literally. It means that nobody really knows where atoms come ...
Part 2 - Aryabhat
... ring or donut. Epsilon Lyrae appears to the naked-eye as a double star, but through a small telescope you can see that the two individual stars are themselves double! Epsilon Lyrae is popularly known as the "double double." Vega is a hydrogen-burning dwarf star, 54 times more luminous and 1.5 times ...
... ring or donut. Epsilon Lyrae appears to the naked-eye as a double star, but through a small telescope you can see that the two individual stars are themselves double! Epsilon Lyrae is popularly known as the "double double." Vega is a hydrogen-burning dwarf star, 54 times more luminous and 1.5 times ...
Diffuse Ultraviolet Emission in Galaxies
... forming. Star formation is a fundamental process of the universe, and a key to our understanding of many topics, ranging from the evolution of galaxies to the origins of life. Because of its complexity, we need many types of observations to investigate various aspects of star formation and evolution ...
... forming. Star formation is a fundamental process of the universe, and a key to our understanding of many topics, ranging from the evolution of galaxies to the origins of life. Because of its complexity, we need many types of observations to investigate various aspects of star formation and evolution ...
Introduction
... • Probes to planets, moons and comets • Direct measurements of interplanetary space • Collect radiation from galactic and extra-galactic sources ...
... • Probes to planets, moons and comets • Direct measurements of interplanetary space • Collect radiation from galactic and extra-galactic sources ...
Astronomy - Career Account Web Pages
... http://news.discovery.com/space/zooms/oldest-galaxy-universe-hubble-110126.html ...
... http://news.discovery.com/space/zooms/oldest-galaxy-universe-hubble-110126.html ...
AAO Techniques Workshop (April 2001) 12 Mbytes
... has focused on imaging star formation regions, cores of active galaxies and distant galaxies. ...
... has focused on imaging star formation regions, cores of active galaxies and distant galaxies. ...
Galaxy Zoo
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.