a MS Word version.
... series of equations, since there is actually more than one equation within some of the four equation "descriptions"), that describe the physics that can be used to calculate the internal structure and time evolution of the Sun and stars. For each equation give a short description of the physical pro ...
... series of equations, since there is actually more than one equation within some of the four equation "descriptions"), that describe the physics that can be used to calculate the internal structure and time evolution of the Sun and stars. For each equation give a short description of the physical pro ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • When numerous supernovae occur relatively near each other and within a few million years of each other, the shock waves from the individual events may merge to form an enormous superbubble. In some places, superbubbles may blow through the galactic disk, creating a fountain of hot, ionized gas tha ...
... • When numerous supernovae occur relatively near each other and within a few million years of each other, the shock waves from the individual events may merge to form an enormous superbubble. In some places, superbubbles may blow through the galactic disk, creating a fountain of hot, ionized gas tha ...
Galaxies
... 5. Limitations of the model There are several limitations of our computer model. First, it is only a two-dimensional demonstration of the galactic collision, but actually, the stars in the galaxies do not completely lie on the same plane. As a result, the model does not consider the 3-D component of ...
... 5. Limitations of the model There are several limitations of our computer model. First, it is only a two-dimensional demonstration of the galactic collision, but actually, the stars in the galaxies do not completely lie on the same plane. As a result, the model does not consider the 3-D component of ...
Spiral structure of the Third Galactic Quadrant and the solution to the
... to be younger than 100 million years. These are listed in Table 1 and plotted in Fig. 2 which represents the third quadrant of the Galactic plane seen from above. Also plotted, are the BPs detected in the backgrounds of several clusters. A strip about 1.5 kpc wide, extending from l=210o to l=260o , ...
... to be younger than 100 million years. These are listed in Table 1 and plotted in Fig. 2 which represents the third quadrant of the Galactic plane seen from above. Also plotted, are the BPs detected in the backgrounds of several clusters. A strip about 1.5 kpc wide, extending from l=210o to l=260o , ...
Recipes for ULX formation: necessary ingredients and garnishments
... a compelling need to invoke intermediate-mass BHs in ULXs, and that the upper mass limit is likely to be somewhere between 50 and 200M . Correspondingly, if dynamical collapse and merger processes are still needed to form a very massive stellar progenitor (> 100M ), clusters as small as ∼ 104 M m ...
... a compelling need to invoke intermediate-mass BHs in ULXs, and that the upper mass limit is likely to be somewhere between 50 and 200M . Correspondingly, if dynamical collapse and merger processes are still needed to form a very massive stellar progenitor (> 100M ), clusters as small as ∼ 104 M m ...
Lectures 19-20 The Milky Way Galaxy
... The Morphology of the Galaxy Structure of Thin and Thick Disks Galactic Disk has two major components, the thin disk, and the thick disk. Thin disk: composed of young stars, dust, and gas, with Hnthin = 350 pc (youngest stars found with scale height of 35-90 pc). Thick disk: older stars with a scal ...
... The Morphology of the Galaxy Structure of Thin and Thick Disks Galactic Disk has two major components, the thin disk, and the thick disk. Thin disk: composed of young stars, dust, and gas, with Hnthin = 350 pc (youngest stars found with scale height of 35-90 pc). Thick disk: older stars with a scal ...
Chapter 14
... These objects are very close to the galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
... These objects are very close to the galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
Lecture21 - Michigan State University
... Because galaxies have many small stars, their mass-tolight ratio is generally greater than 1 Young galaxies have a mass-to-light ratio of 1 to 10 Older galaxies have a mass-to-light ratio of 10 to 20 As much as 90% of the mass of galaxies is not visible in ...
... Because galaxies have many small stars, their mass-tolight ratio is generally greater than 1 Young galaxies have a mass-to-light ratio of 1 to 10 Older galaxies have a mass-to-light ratio of 10 to 20 As much as 90% of the mass of galaxies is not visible in ...
Activity: Multiwavelength Bingo - Chandra X
... Cut out the bingo calling cards along the dotted lines and put them into a container. The caller draws a card from the container, reads it out loud, and puts the card to the side. Players mark the corresponding image on his/her board with a bingo token using the flash cards as a guide. The cal ...
... Cut out the bingo calling cards along the dotted lines and put them into a container. The caller draws a card from the container, reads it out loud, and puts the card to the side. Players mark the corresponding image on his/her board with a bingo token using the flash cards as a guide. The cal ...
US - Real Science
... compressing this gas so much that stars are forming at a staggering rate. Probing further into NGC 1313's interior reveals more mystery. In the midst of the starburst regions, two objects are emitting highly energetic X-rays. These are known as ultra-luminous X-ray sources (ULX). Astronomers suspect ...
... compressing this gas so much that stars are forming at a staggering rate. Probing further into NGC 1313's interior reveals more mystery. In the midst of the starburst regions, two objects are emitting highly energetic X-rays. These are known as ultra-luminous X-ray sources (ULX). Astronomers suspect ...
Starbursts – from 30 Doradus to Lyman
... gyros (used for attitude control) are not expected to last more than a few years. A robotic repair mission is currently under design, but many are sceptical that this will be realized rapidly enough to avert disaster for our community. ...
... gyros (used for attitude control) are not expected to last more than a few years. A robotic repair mission is currently under design, but many are sceptical that this will be realized rapidly enough to avert disaster for our community. ...
Absolute vs. relative distance measures
... FIG. 5.ÈTF relations for all 31 galaxies in the RC sample with measured rotation curves (circles and triangles). The crosses indicate the additional seven galaxies in the SI sample for which a reliable rotation curve could not be measured. Those seven galaxies were ignored when making the inverse le ...
... FIG. 5.ÈTF relations for all 31 galaxies in the RC sample with measured rotation curves (circles and triangles). The crosses indicate the additional seven galaxies in the SI sample for which a reliable rotation curve could not be measured. Those seven galaxies were ignored when making the inverse le ...
SGL 9 NGC Galaxy magnitude 9/10 observing challenge Up for
... you have looked them up on google! Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are part of the Leo II group of galaxies. NGC 3605 is however in the background and NGC 3607/ ...
... you have looked them up on google! Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are part of the Leo II group of galaxies. NGC 3605 is however in the background and NGC 3607/ ...
Messier 87
Messier 87 (also known as Virgo A or NGC 4486, and generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo. One of the most massive galaxies in the local universe, it is notable for its large population of globular clusters—M87 contains about 12,000 compared to the 150-200 orbiting the Milky Way—and its jet of energetic plasma that originates at the core and extends outward at least 1,500 parsecs (4,900 light-years), travelling at relativistic speed. It is one of the brightest radio sources in the sky, and is a popular target for both amateur astronomy observations and professional astronomy study.French astronomer Charles Messier discovered M87 in 1781, cataloguing it as a nebulous feature while searching for objects that would confuse comet hunters. The second brightest galaxy within the northern Virgo Cluster, M87 is located about 16.4 million parsecs (53.5 million light-years) from Earth. Unlike a disk-shaped spiral galaxy, M87 has no distinctive dust lanes. Instead, it has an almost featureless, ellipsoidal shape typical of most giant elliptical galaxies, diminishing in luminosity with distance from the centre. Forming around one sixth of M87's mass, the stars in this galaxy have a nearly spherically symmetric distribution, their density decreasing with increasing distance from the core. At the core is a supermassive black hole, which forms the primary component of an active galactic nucleus. This object is a strong source of multiwavelength radiation, particularly radio waves. M87's galactic envelope extends out to a radius of about 150 kiloparsecs (490,000 light-years), where it has been truncated—possibly by an encounter with another galaxy. Between the stars is a diffuse interstellar medium of gas that has been chemically enriched by elements emitted from evolved stars.