Westerlund 1 : A Super-Star Cluster within the Milky Way
... identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and Red Supergiants, from which we infer an age of 3-5Myr. For an adopted Kroupa IMF we derive a mass of 105 M and radius of 0.3pc for an estimated distance of 2 ...
... identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and Red Supergiants, from which we infer an age of 3-5Myr. For an adopted Kroupa IMF we derive a mass of 105 M and radius of 0.3pc for an estimated distance of 2 ...
Distance Ladder
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
Astronomy 120
... than the other. Then the absorption lines from the fainter star do not appear in the spectrum, but those of the brighter one do. Describe how the Doppler shift would appear from the orbital motion of the stars. 7. Zeilik Study Exercise 13.8 The star Regulus has a mass about five times that of the su ...
... than the other. Then the absorption lines from the fainter star do not appear in the spectrum, but those of the brighter one do. Describe how the Doppler shift would appear from the orbital motion of the stars. 7. Zeilik Study Exercise 13.8 The star Regulus has a mass about five times that of the su ...
$doc.title
... We now introduce the concept of proper motion, as stellar positions change through both parallax and proper motion, and astrometric programs seek to measure both of these.. Since stars move around with random motions within our Galaxy as well as rotate around its center, there are two components to ...
... We now introduce the concept of proper motion, as stellar positions change through both parallax and proper motion, and astrometric programs seek to measure both of these.. Since stars move around with random motions within our Galaxy as well as rotate around its center, there are two components to ...
Stellar Evolution
... than red light. This gas and dust will then tend to “redden” starlight that passes through it. This effect is seen on the earth – the sky is blue because the blue light is scattered more than the red light; but the sunrise and sunsets appear red because most of the blue has been scattered out of the ...
... than red light. This gas and dust will then tend to “redden” starlight that passes through it. This effect is seen on the earth – the sky is blue because the blue light is scattered more than the red light; but the sunrise and sunsets appear red because most of the blue has been scattered out of the ...
Your Place in Space and Time
... a few dozen galaxies, such as our own Local Group, or larger clusters containing up to a few thousand galaxies. ...
... a few dozen galaxies, such as our own Local Group, or larger clusters containing up to a few thousand galaxies. ...
The Ancient Heavens: Exploring the History of Astronomy
... these activities help participants appreciate not only what we know, but how we know it. ...
... these activities help participants appreciate not only what we know, but how we know it. ...
CP2: KUPKA et al.: Observational signatures of atmospheric velocity
... (iota Her is one of the sharpest-line normal B stars known) is enough to mask the signature of the atmospheric convective velocity field, and the same small v sin i prevents the beta Cep oscillations from appearing in the profiles. Fit to spectrum of HD 160762 = iota Her, a normal B3 IV star. Our mo ...
... (iota Her is one of the sharpest-line normal B stars known) is enough to mask the signature of the atmospheric convective velocity field, and the same small v sin i prevents the beta Cep oscillations from appearing in the profiles. Fit to spectrum of HD 160762 = iota Her, a normal B3 IV star. Our mo ...
Astronomy Review revised Key
... 26. What can astronomers determine about stars from the light that they emit? Composition of the stars, and the distance they are from Earth. 27. Draw and label the life cycle of a star. Nebula – average star – red giant – planetary nebula – white dwarf Nebula – massive star – red suprgiant – supern ...
... 26. What can astronomers determine about stars from the light that they emit? Composition of the stars, and the distance they are from Earth. 27. Draw and label the life cycle of a star. Nebula – average star – red giant – planetary nebula – white dwarf Nebula – massive star – red suprgiant – supern ...
Outside the Solar System Outside the Solar System OUTSIDE THE
... What is a supernova? It’s an old star that collapsed. When it collapsed, it crushed its core, or center. The crushing is like squeezing a rubber ball tighter and tighter. When you let go of a rubber ball, it springs back to shape. In a supernova, the crushed star springs back too. But it keeps expan ...
... What is a supernova? It’s an old star that collapsed. When it collapsed, it crushed its core, or center. The crushing is like squeezing a rubber ball tighter and tighter. When you let go of a rubber ball, it springs back to shape. In a supernova, the crushed star springs back too. But it keeps expan ...
Chapter 13
... Supernovae • In a few minutes, more energy is released than during the star’s entire life • It brightens to several billion times the luminosity of the Sun – a luminosity larger than all the stars in the Milky Way combined ...
... Supernovae • In a few minutes, more energy is released than during the star’s entire life • It brightens to several billion times the luminosity of the Sun – a luminosity larger than all the stars in the Milky Way combined ...
Lecture 6
... • Based on the definition of a parsec , if star A has a parallax of 0.5 arcseconds and star B has a parallax of 0.75 arcseconds which one is farther from the Earth? • A. Star B is farther away because it has a ...
... • Based on the definition of a parsec , if star A has a parallax of 0.5 arcseconds and star B has a parallax of 0.75 arcseconds which one is farther from the Earth? • A. Star B is farther away because it has a ...
Journey Through the Universe By Brian Fontaine
... It is believed that our solar system began similar to a galaxy…(or a hurricane). A cloud of gas (nebula) collapsed to form the sun, which began rotating. As time when on, the heavier dust fell toward the sun, creating the rocky inner planets, and the ...
... It is believed that our solar system began similar to a galaxy…(or a hurricane). A cloud of gas (nebula) collapsed to form the sun, which began rotating. As time when on, the heavier dust fell toward the sun, creating the rocky inner planets, and the ...
SAP_Paper1_FutureOfUniverse
... longer possible (NASA). As the moon drifts farther and farther away from us its apparent size will decrease and at some point it will no longer be able to block out the sun from our view. This is brought upon quicker by the fact that the sun is steadily growing. After 100 thousand years many of our ...
... longer possible (NASA). As the moon drifts farther and farther away from us its apparent size will decrease and at some point it will no longer be able to block out the sun from our view. This is brought upon quicker by the fact that the sun is steadily growing. After 100 thousand years many of our ...
Determination of spiral orbits with constant tangential velocity
... Starting from the premise that the internal dynamics of galaxies can be described by a movement of stars on spiral paths, in this paper the spiral paths are determined, matching the observed constancy of the orbital velocity. ...
... Starting from the premise that the internal dynamics of galaxies can be described by a movement of stars on spiral paths, in this paper the spiral paths are determined, matching the observed constancy of the orbital velocity. ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
L10 - QUB Astrophysics Research Centre
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
Learning About Stars
... that the stars don’t move? It’s because we are traveling together in a group and the stars’ positions stay the same in that group….while the planets move around the stars. The stars appear to move because the EARTH is moving. http://theapblog.wordpress.com/2007/04/16/tutorial-star-trails/ ...
... that the stars don’t move? It’s because we are traveling together in a group and the stars’ positions stay the same in that group….while the planets move around the stars. The stars appear to move because the EARTH is moving. http://theapblog.wordpress.com/2007/04/16/tutorial-star-trails/ ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.