Masses are much harder than distance, luminosity, or temperature
... • Range of different mass stars! ...
... • Range of different mass stars! ...
White Dwarfs
... D: Metals spontaneously decay to lighter elements during the 10 billion year age of the globular cluster. ...
... D: Metals spontaneously decay to lighter elements during the 10 billion year age of the globular cluster. ...
Sep 2017 - What`s Out Tonight?
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
AST4930 Star and Planet Formation
... at shorter wavelengths, or e.g., knowing the spectral type of the source from spectroscopic measurements, the spectral energy distribution (SED) of the excess is isolated. The excess has a circumstellar origin, and represents the emission of the dust in the inner part of the circumstellar disks, hea ...
... at shorter wavelengths, or e.g., knowing the spectral type of the source from spectroscopic measurements, the spectral energy distribution (SED) of the excess is isolated. The excess has a circumstellar origin, and represents the emission of the dust in the inner part of the circumstellar disks, hea ...
Star Formation
... Open Clusters & Associations Open Cluster: Group of ~hundreds youngish stars formed at same time from same molecular cloud - Association-tens of young stars not gravitationally bound together ...
... Open Clusters & Associations Open Cluster: Group of ~hundreds youngish stars formed at same time from same molecular cloud - Association-tens of young stars not gravitationally bound together ...
Practice Questions for Final
... A. Novae occur only in binary star systems, while supernovae can occur both among single stars and among binary star systems. B. Supernovae eject gas into space but novae do not. C. Novae are much less luminous than supernovae. D. The same star can undergo novae explosions more than once, but can un ...
... A. Novae occur only in binary star systems, while supernovae can occur both among single stars and among binary star systems. B. Supernovae eject gas into space but novae do not. C. Novae are much less luminous than supernovae. D. The same star can undergo novae explosions more than once, but can un ...
the star
... are the dwarf ellipticals. Gas used up long ago making stars or stripped by galactic collisions and encounters. ...
... are the dwarf ellipticals. Gas used up long ago making stars or stripped by galactic collisions and encounters. ...
The Milky Way - Montgomery College
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... clusters all have approximately the same absolute brightness (i.e. luminosity). These methods work up to distances of nearly one Gpc (= 1,000 Mpc). (vii) The distances to the most remote objects in the universe (e.g. quasars) are found by measuring the redshift of those objects and then by convertin ...
... clusters all have approximately the same absolute brightness (i.e. luminosity). These methods work up to distances of nearly one Gpc (= 1,000 Mpc). (vii) The distances to the most remote objects in the universe (e.g. quasars) are found by measuring the redshift of those objects and then by convertin ...
SHELL H II REGIONS IN NGC 6334
... • In the Orion Nebula we found two young massive stars that appear to have been ejected from the same point some 500 years ago (the same age of the University of ...
... • In the Orion Nebula we found two young massive stars that appear to have been ejected from the same point some 500 years ago (the same age of the University of ...
Jeopardy 2015
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
The Milky Way galaxy
... The Sun is found in the plane of the Galaxy. It moves on a nice circular orbit around the center of the Galaxy along with other stars formed in the plane. If a halo star is passing through the plane, it will have a large relative velocity with respect to the Sun. So this is one way to identify a s ...
... The Sun is found in the plane of the Galaxy. It moves on a nice circular orbit around the center of the Galaxy along with other stars formed in the plane. If a halo star is passing through the plane, it will have a large relative velocity with respect to the Sun. So this is one way to identify a s ...
Southern cross Crux - The Southern Cross Crux, the Southern Cross
... Their luminosities are 25,000 and 16,000 times the Sun's. α1 and α2 Cru orbit over such a long period that motion is only barely seen. ...
... Their luminosities are 25,000 and 16,000 times the Sun's. α1 and α2 Cru orbit over such a long period that motion is only barely seen. ...
Sequencing the Stars
... The first thing to notice is that my HR diagram for M13 looks similar to the one shown before. There are, of course, some differences. I’m showing more stars. The VizieR database that I used for the “professional” HR diagram excludes stars that are crowded by nearby stars making it hard to obtain ac ...
... The first thing to notice is that my HR diagram for M13 looks similar to the one shown before. There are, of course, some differences. I’m showing more stars. The VizieR database that I used for the “professional” HR diagram excludes stars that are crowded by nearby stars making it hard to obtain ac ...
Slide 1
... discussed this in the context of field star-cluster IMF differences. Unclear if this works if most clusters are more massive than the most massive possible star, or else discrete sampling effects need to be explicitly considered. Also, examples given here show it is not so clear that clusters have f ...
... discussed this in the context of field star-cluster IMF differences. Unclear if this works if most clusters are more massive than the most massive possible star, or else discrete sampling effects need to be explicitly considered. Also, examples given here show it is not so clear that clusters have f ...
Star Birth
... – Molecular H is hard to detect, since they do not emit light (radiation) – However, carbon monoxide present in these clouds emit millimeter wavelength light, and thus can be detected by radio telescopes. – these giant clouds have masses ranging from 105 - 106M. ...
... – Molecular H is hard to detect, since they do not emit light (radiation) – However, carbon monoxide present in these clouds emit millimeter wavelength light, and thus can be detected by radio telescopes. – these giant clouds have masses ranging from 105 - 106M. ...
20 pm - Starmap
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
COM 2014 January
... “Through the 4-inch, NGC 1275 is less a firefly and more a piece of starlit lint.” – SJ O’Meara ...
... “Through the 4-inch, NGC 1275 is less a firefly and more a piece of starlit lint.” – SJ O’Meara ...
Powerpoint for today
... Finally, fusion starts, stopping collapse: a star! Star reaches Main Sequence at end of Hayashi Track ...
... Finally, fusion starts, stopping collapse: a star! Star reaches Main Sequence at end of Hayashi Track ...
Astronomy 10B List of Concepts– by Chapter
... o Why dust cools molecular clouds better than other ISM o Why are these where stars form? CHAPTER 12: STAR FORMATION • Observations of star formation • Stars form in molecular clouds because … • Stars form in clusters because … • The stages of star formation • Why does a disk form? • Why do jets for ...
... o Why dust cools molecular clouds better than other ISM o Why are these where stars form? CHAPTER 12: STAR FORMATION • Observations of star formation • Stars form in molecular clouds because … • Stars form in clusters because … • The stages of star formation • Why does a disk form? • Why do jets for ...
Neutron Stars - Otterbein University
... • Classic example: Great Hercules Cluster (M13) • Spherical clusters • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
... • Classic example: Great Hercules Cluster (M13) • Spherical clusters • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
3-color photometry of stellar cluster - Kiepenheuer
... and from the sky are more severe near horizon. Due to the wavelenght dependant scattering cross-section, blue is affected the most followed by green and red (Weigert and Wendker, 1989). Lastly the observatory at Schauinsland is surrounded thees by which helps with straylight from the cities but rest ...
... and from the sky are more severe near horizon. Due to the wavelenght dependant scattering cross-section, blue is affected the most followed by green and red (Weigert and Wendker, 1989). Lastly the observatory at Schauinsland is surrounded thees by which helps with straylight from the cities but rest ...
Unit 1
... of a single interstellar cloud of gas and dust • These groups are called star clusters • Open clusters have a low density of stars – there is lots of space between the cluster’s members • They can contain up to a few thousand stars in a volume 14 to 40 light years across • The Pleiades is a very fam ...
... of a single interstellar cloud of gas and dust • These groups are called star clusters • Open clusters have a low density of stars – there is lots of space between the cluster’s members • They can contain up to a few thousand stars in a volume 14 to 40 light years across • The Pleiades is a very fam ...
Open cluster
An open cluster, also known as galactic cluster, is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist. They are loosely bound by mutual gravitational attraction and become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center, resulting in a migration to the main body of the galaxy as well as a loss of cluster members through internal close encounters. Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.Young open clusters may still be contained within the molecular cloud from which they formed, illuminating it to create an H II region. Over time, radiation pressure from the cluster will disperse the molecular cloud. Typically, about 10% of the mass of a gas cloud will coalesce into stars before radiation pressure drives the rest of the gas away.Open clusters are key objects in the study of stellar evolution. Because the cluster members are of similar age and chemical composition, their properties (such as distance, age, metallicity and extinction) are more easily determined than they are for isolated stars. A number of open clusters, such as the Pleiades, Hyades or the Alpha Persei Cluster are visible with the naked eye. Some others, such as the Double Cluster, are barely perceptible without instruments, while many more can be seen using binoculars or telescopes. The Wild Duck Cluster, M11, is an example.