DSLR Photometry
... Des says in theory it is advisable to also construct master flat field frames in order to remove the effects of the edge distortions of lens. Des has found, however, that the field of view of a DSLR is so wide that a flat field is not required, if you are using high quality lenses, provided the targ ...
... Des says in theory it is advisable to also construct master flat field frames in order to remove the effects of the edge distortions of lens. Des has found, however, that the field of view of a DSLR is so wide that a flat field is not required, if you are using high quality lenses, provided the targ ...
Final Review Sheet
... Central density over 10**15 g/cm**3. Like white dwarfs have a maximum mass, but the value is uncertain. Probably near 2 Msun. If the supernova leaves behind a remnant larger than this it will be a black hole. Many neutron stars (but not all) are seen to be pulsars. A pulsar is a rotating, magnetic, ...
... Central density over 10**15 g/cm**3. Like white dwarfs have a maximum mass, but the value is uncertain. Probably near 2 Msun. If the supernova leaves behind a remnant larger than this it will be a black hole. Many neutron stars (but not all) are seen to be pulsars. A pulsar is a rotating, magnetic, ...
constellation.
... 1) Title (10 points) 1 slide Include your names, period and the Name of your Constellations 2) A picture or drawing of your constellation. (10 points) 1 slide This should show what the actual character looks like along with the stars that make the constellation. 3) Label important stars (10 points) ...
... 1) Title (10 points) 1 slide Include your names, period and the Name of your Constellations 2) A picture or drawing of your constellation. (10 points) 1 slide This should show what the actual character looks like along with the stars that make the constellation. 3) Label important stars (10 points) ...
Why Aren`t All Galaxies Barred?
... only way, to study the behaviour of such galaxies, is to programme a computer to calculate how a given configuration of stars would develop over a long period of time. This is the approach I have followed at ESO using the CERN computers. Large, fast computers are essential, since we wish to calculat ...
... only way, to study the behaviour of such galaxies, is to programme a computer to calculate how a given configuration of stars would develop over a long period of time. This is the approach I have followed at ESO using the CERN computers. Large, fast computers are essential, since we wish to calculat ...
Chapter 3 Cosmology 3.1 The Doppler effect
... in Andromeda that he had identified. He then used data obtained on Cepheid variables of known absolute magnitudes to find the absolute magnitude and hence the distance to each Cepheid variable in Andromeda. He found that Andromeda is about 900 kiloparsec away, far beyond the Milky Way galaxy which w ...
... in Andromeda that he had identified. He then used data obtained on Cepheid variables of known absolute magnitudes to find the absolute magnitude and hence the distance to each Cepheid variable in Andromeda. He found that Andromeda is about 900 kiloparsec away, far beyond the Milky Way galaxy which w ...
Properties of Ellipticals and Spirals
... Velocity dispersions are responsible for the overall shape of galaxies. Oblate and Prolate Ellipticals – how that? Spiral: Velocities of stars in spirals are more ordered. Stars rotate around the galactic center in a disk surrounding it – Halo is random. Spiral galaxies are flattened by rotation (el ...
... Velocity dispersions are responsible for the overall shape of galaxies. Oblate and Prolate Ellipticals – how that? Spiral: Velocities of stars in spirals are more ordered. Stars rotate around the galactic center in a disk surrounding it – Halo is random. Spiral galaxies are flattened by rotation (el ...
Agenda - Relativity Group
... a. Yes, all stars create heavier elements than carbon when they become a supernova. b. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolifically than low-mass stars. c. No, the core temperatures of low-mass stars are too low to fuse othe ...
... a. Yes, all stars create heavier elements than carbon when they become a supernova. b. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolifically than low-mass stars. c. No, the core temperatures of low-mass stars are too low to fuse othe ...
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera
... located near one end of a giant molecular cloud (Rosette Molecular Cloud)—a place of ongoing star formation. The Monoceros Loop (a circular optical nebulosity /in the vicinity of the Rosette Nebula) is thought to be a supernova remnant (the final product of the evolution of a very massive star). Ros ...
... located near one end of a giant molecular cloud (Rosette Molecular Cloud)—a place of ongoing star formation. The Monoceros Loop (a circular optical nebulosity /in the vicinity of the Rosette Nebula) is thought to be a supernova remnant (the final product of the evolution of a very massive star). Ros ...
10.1 Introduction
... Figure 10.6). At a distance of only 2.4 pc, Wolf 359 is the fifth closest star to the Sun, after the three stars that make up the α Centauri system and Barnard’s star. Its spectral type is M6.0 V and its luminosity is 0.001L ; ...
... Figure 10.6). At a distance of only 2.4 pc, Wolf 359 is the fifth closest star to the Sun, after the three stars that make up the α Centauri system and Barnard’s star. Its spectral type is M6.0 V and its luminosity is 0.001L ; ...
The Sky
... – The Big Dipper, for example, is a well-known asterism that is part of the constellation Ursa Major (Great Bear). – Another asterism is the Great Square of Pegasus, which includes three stars from Pegasus and one (Alpheratz) from Andromeda. ...
... – The Big Dipper, for example, is a well-known asterism that is part of the constellation Ursa Major (Great Bear). – Another asterism is the Great Square of Pegasus, which includes three stars from Pegasus and one (Alpheratz) from Andromeda. ...
Document
... • Models for AGB stars, predict that Tc will be synthesized inbetween shell flashes and convected to the surface. • In 1952 Tc was detected for the first time in a star and now is routinely found in the spectra of AGB stars. This is direct proof of nucleosynthesis in stars and a powerful verificatio ...
... • Models for AGB stars, predict that Tc will be synthesized inbetween shell flashes and convected to the surface. • In 1952 Tc was detected for the first time in a star and now is routinely found in the spectra of AGB stars. This is direct proof of nucleosynthesis in stars and a powerful verificatio ...
Lecture 11: Stars, HR diagram.
... Description? temperature, luminosity, size, mass, radius, etc. Are these characteristics related? This is what the Herzsprung-Russel (or HR from now on) is all about. Example: HR diagrams for two clusters M67 (young) and M4 (old) What can we learn from this? ...
... Description? temperature, luminosity, size, mass, radius, etc. Are these characteristics related? This is what the Herzsprung-Russel (or HR from now on) is all about. Example: HR diagrams for two clusters M67 (young) and M4 (old) What can we learn from this? ...
Dorn_projectF08 - Bowling Green State University
... about 250 stars. The brightest and youngest of these formed about two million years ago, early in astronomical time. Also known as M 45, named after the daughters of E Atlas and Pleione. With a clear sky W about 7 stars are visible with the naked eye, covering 1°of sky, and are 415 Ly. away. The bri ...
... about 250 stars. The brightest and youngest of these formed about two million years ago, early in astronomical time. Also known as M 45, named after the daughters of E Atlas and Pleione. With a clear sky W about 7 stars are visible with the naked eye, covering 1°of sky, and are 415 Ly. away. The bri ...
1.3 Lifecycle of stars
... A star of more than 8 solar masses can fuse elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a su ...
... A star of more than 8 solar masses can fuse elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line—it stays at just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a su ...
Understanding Stars
... In this exercise, your group will calculate the temperature, luminosity, and radius of a number of stars, and add these values to the temperature-luminosity diagram on the board. The accompanying handout gives recipes for calculating, in physical units, the properties of any star based only on its s ...
... In this exercise, your group will calculate the temperature, luminosity, and radius of a number of stars, and add these values to the temperature-luminosity diagram on the board. The accompanying handout gives recipes for calculating, in physical units, the properties of any star based only on its s ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.