M77 (NGC 1068)
... Galaxies who’s nuclei alone produce more radiation then the rest of the galaxy. The widely accepted model of an AGN galaxy is that it has a central super massive black hole as it’s engine. ...
... Galaxies who’s nuclei alone produce more radiation then the rest of the galaxy. The widely accepted model of an AGN galaxy is that it has a central super massive black hole as it’s engine. ...
Interferometric Doppler Imaging of Chemically Peculiar stars
... All the F stars can be resolved at 1 μm with baselines ≥ 100 m F stars are in the “sweet spot” for angular diameter and hence age measurement: they are bright, near to us, their evolutionary tracks are reliable, and they are still above ZAMS. ...
... All the F stars can be resolved at 1 μm with baselines ≥ 100 m F stars are in the “sweet spot” for angular diameter and hence age measurement: they are bright, near to us, their evolutionary tracks are reliable, and they are still above ZAMS. ...
Observational properties of stars
... any ways). So we’ll just always make the assumption that the black body temperature is fine and we’ll just use that (so you’ll only see T and we’re not bothering with the “eff”). 2. Observed Properties of Stars 2.1 Apparent and Absolute Magnitudes When you observe a star you are often missing a larg ...
... any ways). So we’ll just always make the assumption that the black body temperature is fine and we’ll just use that (so you’ll only see T and we’re not bothering with the “eff”). 2. Observed Properties of Stars 2.1 Apparent and Absolute Magnitudes When you observe a star you are often missing a larg ...
PPT
... media collide violently, either stripping the gas and dust from the galaxies or triggering prolific star formation. The gravitational effects during a galactic collision can throw stars out of their galaxies into intergalactic space. Galactic mergers may occur; a large galaxy in a rich cluster may t ...
... media collide violently, either stripping the gas and dust from the galaxies or triggering prolific star formation. The gravitational effects during a galactic collision can throw stars out of their galaxies into intergalactic space. Galactic mergers may occur; a large galaxy in a rich cluster may t ...
Using photometric analysis to determine characteristics of the V
... see that there is a decrease in the brightness of the nova as we progress in time. This can best be explained by the fact that as the photosphere increases in size, it’\s rate of cooling increases. Thus, more energy is dissipated and therefore the less bright the nova appears. Further ...
... see that there is a decrease in the brightness of the nova as we progress in time. This can best be explained by the fact that as the photosphere increases in size, it’\s rate of cooling increases. Thus, more energy is dissipated and therefore the less bright the nova appears. Further ...
TWO NEW VARIABLE STARS OBSERVED IN THE FIELD OF THE
... Only on the base of our photometric data some doubts necessairly remain regarding the precise identity of the system, and we considered here two plausible alternatives. The object could be a short-period non eclipsing binary system showing the properties typical of an ellipsoidal variable (ELL varia ...
... Only on the base of our photometric data some doubts necessairly remain regarding the precise identity of the system, and we considered here two plausible alternatives. The object could be a short-period non eclipsing binary system showing the properties typical of an ellipsoidal variable (ELL varia ...
Determination of the distance to the Andromeda Galaxy using variable stars U
... Since the observations were performed in five annual observing seasons, the data are very unevenly sampled. To overcome this major drawback in determining periodicities, a program based on the analysis of variance (Schwarzenberg-Czerny, 1996) was used to compute the periodograms for each variable st ...
... Since the observations were performed in five annual observing seasons, the data are very unevenly sampled. To overcome this major drawback in determining periodicities, a program based on the analysis of variance (Schwarzenberg-Czerny, 1996) was used to compute the periodograms for each variable st ...
Document
... Helioseismology Oscillation frequencies can be used to yield information on the structure and dynamics inside the Sun. ...
... Helioseismology Oscillation frequencies can be used to yield information on the structure and dynamics inside the Sun. ...
A-level Physics (Specification A) Teacher guide Teacher guide
... many find fascinating. It includes a study of the main methods of acquiring information, how that information is used to analyse and catalogue astronomical objects and modern theories on cosmology. The topic provides a grounding in both the practical and theoretical study of astrophysics. In the fir ...
... many find fascinating. It includes a study of the main methods of acquiring information, how that information is used to analyse and catalogue astronomical objects and modern theories on cosmology. The topic provides a grounding in both the practical and theoretical study of astrophysics. In the fir ...
Robert_Minchin_Galaxies_2011_REU
... Measuring Dynamics • Dynamics can be measured by looking at emission and absorption lines from stars and star-forming regions, or from the gas in the ISM. • Dynamics for spiral and irregular galaxies are often measured using the 21-cm line of neutral hydrogen. • For elliptical and spheroidal galaxi ...
... Measuring Dynamics • Dynamics can be measured by looking at emission and absorption lines from stars and star-forming regions, or from the gas in the ISM. • Dynamics for spiral and irregular galaxies are often measured using the 21-cm line of neutral hydrogen. • For elliptical and spheroidal galaxi ...
Chapter 1: Introduction to Galaxies File - QMplus
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
Dark Matter: Inquiring Minds Want to Know ()
... Colliding Galaxy Clusters The atom part and the Dark Matter part of Galaxies interact differently as they pass through each other ...
... Colliding Galaxy Clusters The atom part and the Dark Matter part of Galaxies interact differently as they pass through each other ...
Early Star-Forming Galaxies
... needed to make stars. The more gas a galaxy contains, the more stars it can form. Long-wavelength observations, such as those made in the far-infrared and submillimeter spectral regimes, can detect the glow of warm dust heated by hot stars nearby. These stars cannot be seen in visible light because ...
... needed to make stars. The more gas a galaxy contains, the more stars it can form. Long-wavelength observations, such as those made in the far-infrared and submillimeter spectral regimes, can detect the glow of warm dust heated by hot stars nearby. These stars cannot be seen in visible light because ...
The 6dF Galaxy Survey: Mass and Motions in the Local Universe
... (1) the amplitude of the galaxy power spectrum, which is related to the amplitude of the mass power spectrum by the bias parameter, Ag = bAm ; (2) the amplitude of the velocity field Av = Ω0.6 Am ; (3) the power spectrum shape parameter, Γ = Ωm h; (4) the mass density in baryons, ωb = Ωb h; (5) the ...
... (1) the amplitude of the galaxy power spectrum, which is related to the amplitude of the mass power spectrum by the bias parameter, Ag = bAm ; (2) the amplitude of the velocity field Av = Ω0.6 Am ; (3) the power spectrum shape parameter, Γ = Ωm h; (4) the mass density in baryons, ωb = Ωb h; (5) the ...
Document
... This diagram shows a single closed dimension of cosmological space (a huge cosmic great circle) and many local ‘directions’ or dimensions of time. We may think of time in spacetime in much the same way that we think of the gravitational gradient on Earth; time is not a single dimension of spacetime, ...
... This diagram shows a single closed dimension of cosmological space (a huge cosmic great circle) and many local ‘directions’ or dimensions of time. We may think of time in spacetime in much the same way that we think of the gravitational gradient on Earth; time is not a single dimension of spacetime, ...
powerpoint - High Energy Physics at Wayne State
... Astronomy is a Time Machine When we observe a star that is 100 light-years distant, then the light took 100 years to reach us. We are seeing it as it was 100 years ago. The nearest galaxy is about a million light-years from Earth. We see it as it was 1 million years ago. The most distant objects ob ...
... Astronomy is a Time Machine When we observe a star that is 100 light-years distant, then the light took 100 years to reach us. We are seeing it as it was 100 years ago. The nearest galaxy is about a million light-years from Earth. We see it as it was 1 million years ago. The most distant objects ob ...
Mass determinations of PMS stars with the
... • PMS fainter that K=10 mag or that are visual binaries or have a v sin i > 50 km/s are unsuitable ...
... • PMS fainter that K=10 mag or that are visual binaries or have a v sin i > 50 km/s are unsuitable ...
Venus Transit and the Astronomical Unit
... The distance to the Moon comes out to be 5,73,300 km, which is about 50 per cent higher than the average value of 3,84,400 km. ...
... The distance to the Moon comes out to be 5,73,300 km, which is about 50 per cent higher than the average value of 3,84,400 km. ...
PDF
... suggested a significantly smaller distance of 118 parsecs as compared to the so far accepted ground-based 135 parsecs. One parsec is the distance to which the mean distance between the Earth and the Sun (called an astronomical unit), subtends an angle of one arcsecond. Distances have been always ver ...
... suggested a significantly smaller distance of 118 parsecs as compared to the so far accepted ground-based 135 parsecs. One parsec is the distance to which the mean distance between the Earth and the Sun (called an astronomical unit), subtends an angle of one arcsecond. Distances have been always ver ...
30-1 - Fremont Peak Observatory Association
... Right before the bright part of the Milky Way makes its appearance there are several bright globs in Ophiuchus. Technically this is the bulge of the Milky Way, but seeing the bulge requires an exceptionally dark sky. M 10, 12, and 14 are all an easy star hop from each other. There are also several b ...
... Right before the bright part of the Milky Way makes its appearance there are several bright globs in Ophiuchus. Technically this is the bulge of the Milky Way, but seeing the bulge requires an exceptionally dark sky. M 10, 12, and 14 are all an easy star hop from each other. There are also several b ...
1B11 Foundations of Astronomy Star names and magnitudes
... 1B11 Glossary of terms - V • Vernal Equinox – The zero point for RA which is defined as the position of the Sun in the sky at the Vernal Equinox (~21 March), the point at which the Sun crosses the equator from South to North. It is also known as the “First Point of Aries” (although it is now in Pis ...
... 1B11 Glossary of terms - V • Vernal Equinox – The zero point for RA which is defined as the position of the Sun in the sky at the Vernal Equinox (~21 March), the point at which the Sun crosses the equator from South to North. It is also known as the “First Point of Aries” (although it is now in Pis ...
A Collection of Curricula for the STARLAB Deep Sky Objects
... All the stars, clusters and nebulae seen in the night sky with the unaided eye are part of the Milky Way Galaxy. (Slides #58 and 59 show photographs of the Milky Way.) The Milky Way is one of many millions (perhaps billions) of galaxies that are part of our universe. Though there are several types o ...
... All the stars, clusters and nebulae seen in the night sky with the unaided eye are part of the Milky Way Galaxy. (Slides #58 and 59 show photographs of the Milky Way.) The Milky Way is one of many millions (perhaps billions) of galaxies that are part of our universe. Though there are several types o ...
Mole Day Activity WS
... c) The distance from the earth to the closest star outside our galaxy-- 4 × 1013 km d) The distance that is spanned by the local cluster of galaxies that we are in (including the Milky Way and Andromeda, 5 million light years across) -- 4.8 × 1019 km 6) [2 pts] How much would the mole of pennies be ...
... c) The distance from the earth to the closest star outside our galaxy-- 4 × 1013 km d) The distance that is spanned by the local cluster of galaxies that we are in (including the Milky Way and Andromeda, 5 million light years across) -- 4.8 × 1019 km 6) [2 pts] How much would the mole of pennies be ...
ATA2010
... of the star forming events which built up our Galaxy Galaxies like the Milky Way are believed to form by • the infall of gas which then turns gradually to stars (most of which form in the disk of the Galaxy, in open star clusters which quickly dissolve), and also by • the accretion of smaller galaxi ...
... of the star forming events which built up our Galaxy Galaxies like the Milky Way are believed to form by • the infall of gas which then turns gradually to stars (most of which form in the disk of the Galaxy, in open star clusters which quickly dissolve), and also by • the accretion of smaller galaxi ...
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.