Weighing Ultracompact Dwarf Galaxies in the Fornax Cluster
... (UVES) were used to derive internal velocity dispersions of Ultracompact Dwarf galaxies (UCDs) in the Fornax cluster of galaxies. The velocity dispersions, together with highly spatially resolved luminosity profiles from Hubble Space Telescope imaging (ACS camera), allowed us to derive the dynamica ...
... (UVES) were used to derive internal velocity dispersions of Ultracompact Dwarf galaxies (UCDs) in the Fornax cluster of galaxies. The velocity dispersions, together with highly spatially resolved luminosity profiles from Hubble Space Telescope imaging (ACS camera), allowed us to derive the dynamica ...
#1) Description: The figure below shows several positions of a
... #1) Description: The figure below shows several positions of a comet traveling in an elliptical orbit around the Sun. Four different segments of its orbit ( A – D), and the corresponding triangular shaped area swept out by the comet, have been shaded in gray. Assume that each of the shaded triangula ...
... #1) Description: The figure below shows several positions of a comet traveling in an elliptical orbit around the Sun. Four different segments of its orbit ( A – D), and the corresponding triangular shaped area swept out by the comet, have been shaded in gray. Assume that each of the shaded triangula ...
Test - Scioly.org
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
Chapter 1 Our Place in the Universe
... – Earth is part of the Solar System, which is in the Milky Way galaxy, which is a member of the Local Group of galaxies in the Local Supercluster ...
... – Earth is part of the Solar System, which is in the Milky Way galaxy, which is a member of the Local Group of galaxies in the Local Supercluster ...
Introduction to Astrophysics, Lecture 10
... the Scalo mass function, which are quite different at the high-mass end. ...
... the Scalo mass function, which are quite different at the high-mass end. ...
21. The Milky Way Galaxy
... actually due to the stars' collective gravity. The higher gravity of the jams keeps stars in them for longer. Calculations and computer simulations show this situation can be maintained for a long time. ...
... actually due to the stars' collective gravity. The higher gravity of the jams keeps stars in them for longer. Calculations and computer simulations show this situation can be maintained for a long time. ...
HOU Supernova Light Curves
... something like this. When the nuclear power source at the center or core of a star is exhausted, the core collapses. In less than a second, a neutron star (or a black hole, if the star is extremely massive) is formed. The formation of a neutron star releases an enormous amount of energy in the form ...
... something like this. When the nuclear power source at the center or core of a star is exhausted, the core collapses. In less than a second, a neutron star (or a black hole, if the star is extremely massive) is formed. The formation of a neutron star releases an enormous amount of energy in the form ...
Remote Observatory Atacama Desert
... as the Blazhko effect. Back in 1907 S. Blazhko observed this effect for the first time in the star RW Dra (see Smith 2004). The Blazhko effect is not wellunderstood and needs further observational campaigns. Recently due to the Kepler and CoRoT satellite missions, more insight into this phenomenon h ...
... as the Blazhko effect. Back in 1907 S. Blazhko observed this effect for the first time in the star RW Dra (see Smith 2004). The Blazhko effect is not wellunderstood and needs further observational campaigns. Recently due to the Kepler and CoRoT satellite missions, more insight into this phenomenon h ...
Stout_Research_paper
... than the amount of visible matter that can be seen, it is postulated that the difference between these two numbers is made up of dark matter. This is a direct way of measuring the amount of dark matter in the universe [2]. Thousands of galaxy clusters will be seen with LSST, allowing precise measure ...
... than the amount of visible matter that can be seen, it is postulated that the difference between these two numbers is made up of dark matter. This is a direct way of measuring the amount of dark matter in the universe [2]. Thousands of galaxy clusters will be seen with LSST, allowing precise measure ...
Spectra of Star Clusters
... stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, d ...
... stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, d ...
Nearby Stars - How far away is it
... Arcturus and Vega. Closer examination finds that Capella is actually four stars organized as two binary systems. Castor - 49.8 light years Castor is actually three sets of binary systems with some bright yellow and some dim red stars. Hipparcos Since 1838, many astronomers have spent decades measuri ...
... Arcturus and Vega. Closer examination finds that Capella is actually four stars organized as two binary systems. Castor - 49.8 light years Castor is actually three sets of binary systems with some bright yellow and some dim red stars. Hipparcos Since 1838, many astronomers have spent decades measuri ...
June - Fort Worth Astronomical Society
... the Texas Star Party, there is an observing list developed with some specific theme. This year's observing list was called "Seeing Double" , featuring a list of galaxies that had two in the same field of view. Many or most of these were actually interacting, and there was another more difficult list ...
... the Texas Star Party, there is an observing list developed with some specific theme. This year's observing list was called "Seeing Double" , featuring a list of galaxies that had two in the same field of view. Many or most of these were actually interacting, and there was another more difficult list ...
Still Lost in Space
... So the simplest conclusion is that these things are not stars, or at least not stars as we know them. They are something strange and different. We thus no longer need the “saddle shaped universe” hypothesis. Which is not to say that it isn’t true - just that we have no evidence for it. Let’s ...
... So the simplest conclusion is that these things are not stars, or at least not stars as we know them. They are something strange and different. We thus no longer need the “saddle shaped universe” hypothesis. Which is not to say that it isn’t true - just that we have no evidence for it. Let’s ...
The Milky Way Galaxy
... spheroid. A massive black hole marks the center of the Galaxy. The (Our) Sun sits far out in the disc and in visible light. Our view of the Galaxy is limited by interstellar dust. Consequently, the large-scale structure of the Galaxy must be inferred from observations made at infrared and radio wave ...
... spheroid. A massive black hole marks the center of the Galaxy. The (Our) Sun sits far out in the disc and in visible light. Our view of the Galaxy is limited by interstellar dust. Consequently, the large-scale structure of the Galaxy must be inferred from observations made at infrared and radio wave ...
Introduction
... to stars. These stars return much of their mass, often enriched in “metals” – elements heavier than H and He – to the interstellar medium (ISM). Stellar evolution also yields remnants which add to the dark matter content, and both stars and gas may be accreted by black holes. Galaxies are sometimes ...
... to stars. These stars return much of their mass, often enriched in “metals” – elements heavier than H and He – to the interstellar medium (ISM). Stellar evolution also yields remnants which add to the dark matter content, and both stars and gas may be accreted by black holes. Galaxies are sometimes ...
CS3_Ch 3 - Leon County Schools
... The universe is made up of stars, gas, and dust, as well as invisible dark matter. Material in the universe is pulled by gravity into galaxies, including our own Milky Way galaxy. ...
... The universe is made up of stars, gas, and dust, as well as invisible dark matter. Material in the universe is pulled by gravity into galaxies, including our own Milky Way galaxy. ...
Revealing Galactic Scale Bars with the help of Galaxy Zoo
... We use visual classifications of the brightest 250,000 galaxies in the Sloan Digital Sky Survey Main Galaxy Sample provided by citizen scientists via the Galaxy Zoo project (www.galaxyzoo.org, Lintott et al. 2008) to identify a sample of local disc galaxies with reliable bar identifications. These d ...
... We use visual classifications of the brightest 250,000 galaxies in the Sloan Digital Sky Survey Main Galaxy Sample provided by citizen scientists via the Galaxy Zoo project (www.galaxyzoo.org, Lintott et al. 2008) to identify a sample of local disc galaxies with reliable bar identifications. These d ...
November 2005 - Otterbein University
... • Direct measurement is possible for a few dozen relatively close, large stars – Angular size of the disk and known distance can be used to deduce diameter ...
... • Direct measurement is possible for a few dozen relatively close, large stars – Angular size of the disk and known distance can be used to deduce diameter ...
What is a light-year?
... The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000 ...
... The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000 ...
Galactic Encounters: The Dynamics of Mergers and Satellite Accretion
... galaxies merge, direct hits of stars are very unlikely. This shouldn’t be surprising, considering how small the fraction of the area filled by stars in a galaxy is. For the solar neighbourhood we typically have 20 stars/pc3 and the radius of each star is about 0.2Rsun on average. So the fractional a ...
... galaxies merge, direct hits of stars are very unlikely. This shouldn’t be surprising, considering how small the fraction of the area filled by stars in a galaxy is. For the solar neighbourhood we typically have 20 stars/pc3 and the radius of each star is about 0.2Rsun on average. So the fractional a ...
Counter-rotating Stellar Components in Simulated Disk Galaxies
... major axis shows striking bimodality. This bimodality indicates the presence of two disk components, photometrically inseparable, but counterstreaming at projected velocities of 100km/s and +150km/s (Rix et al 1992) ...
... major axis shows striking bimodality. This bimodality indicates the presence of two disk components, photometrically inseparable, but counterstreaming at projected velocities of 100km/s and +150km/s (Rix et al 1992) ...
2017 Maryland Regional
... electron degeneracy pressure. The Chandrasekhar limit falls where enough mass has been added to the white dwarf that EDP is no longer sufficient to balance the force of gravity__ 42. __ The minimum-energy arrangement of the neutronized nuclei in the star must result in some neutrons being found outs ...
... electron degeneracy pressure. The Chandrasekhar limit falls where enough mass has been added to the white dwarf that EDP is no longer sufficient to balance the force of gravity__ 42. __ The minimum-energy arrangement of the neutronized nuclei in the star must result in some neutrons being found outs ...
26.4 Groups of Stars
... Globular clusters can contain more than a million stars. Globular clusters usually do not have short-lived blue stars because these stars have already died out. Astronomers estimate that the oldest globular clusters are about 12 billion years old. Thus, the universe must be at least that old. ...
... Globular clusters can contain more than a million stars. Globular clusters usually do not have short-lived blue stars because these stars have already died out. Astronomers estimate that the oldest globular clusters are about 12 billion years old. Thus, the universe must be at least that old. ...
Formation of Globular Clusters: In and Out of Dwarf
... dynamical evolution explains the present mass function, but not all initial conditions or evolutionary scenarios work spatial distribution: isotropic, power-law as observed velocity distribution: isotropic at the center, radial at large radii Formation of massive star clusters will soon be inc ...
... dynamical evolution explains the present mass function, but not all initial conditions or evolutionary scenarios work spatial distribution: isotropic, power-law as observed velocity distribution: isotropic at the center, radial at large radii Formation of massive star clusters will soon be inc ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.