Transcript - Chandra X
... The constellation Sagittarius is in the direction of the center of the Milky Way Galaxy (MWG) and the four million solar mass black hole Sgr A*. The Chandra mission has observed Sag A* extensively, determining the structure of it jets and accretion disk, as well as unanticipated star formation in th ...
... The constellation Sagittarius is in the direction of the center of the Milky Way Galaxy (MWG) and the four million solar mass black hole Sgr A*. The Chandra mission has observed Sag A* extensively, determining the structure of it jets and accretion disk, as well as unanticipated star formation in th ...
1B11 Foundations of Astronomy Star names and magnitudes
... escape velocity exceeds the speed of light • Supernova – when a massive star at the end of its normal stellar evolution explodes to form a neutron star or black hole ...
... escape velocity exceeds the speed of light • Supernova – when a massive star at the end of its normal stellar evolution explodes to form a neutron star or black hole ...
CONSTELLATIONS OF THE SOUTHERN SKY VOLANS
... Volans, the Latin title by which it became generally known until the mid 19th century. In 1844 the English astronomer John Herschel proposed shortening it to just Volans. Francis Baily adopted this suggestion in his British Association Catalogue of 1845, and it has been known as that ever since. Vol ...
... Volans, the Latin title by which it became generally known until the mid 19th century. In 1844 the English astronomer John Herschel proposed shortening it to just Volans. Francis Baily adopted this suggestion in his British Association Catalogue of 1845, and it has been known as that ever since. Vol ...
- EPJ Web of Conferences
... Figure 2. (a) Mean metallicity, and (b) metallicity dispersion, [Fe/H], vs. system absolute magnitude, MV ,total , for the dwarf galaxy satellites of the Milky Way and the massive globular cluster Cen. Figure from [10]. ...
... Figure 2. (a) Mean metallicity, and (b) metallicity dispersion, [Fe/H], vs. system absolute magnitude, MV ,total , for the dwarf galaxy satellites of the Milky Way and the massive globular cluster Cen. Figure from [10]. ...
Chapter 17
... 24. We can verify the Sun's estimated position in our galaxy by: A. comparing it to the 3-dimensional system of globular clusters and knowing their distances determined from the luminosities of the RR Lyrae type stars. B. Using Kerler's period-luminosity law. C. applying Newton's law to its motion a ...
... 24. We can verify the Sun's estimated position in our galaxy by: A. comparing it to the 3-dimensional system of globular clusters and knowing their distances determined from the luminosities of the RR Lyrae type stars. B. Using Kerler's period-luminosity law. C. applying Newton's law to its motion a ...
AST1100 Lecture Notes
... the collapse is suddenly stopped, the core bounces back and an energetic shock wave is generated. This shock wave travels outwards from the core but is blocked by the massive and dense ’iron cap’, the outer core, which is in free fall towards the inner core. The energy of the shock wave heats the ou ...
... the collapse is suddenly stopped, the core bounces back and an energetic shock wave is generated. This shock wave travels outwards from the core but is blocked by the massive and dense ’iron cap’, the outer core, which is in free fall towards the inner core. The energy of the shock wave heats the ou ...
The Milky Way Galaxy
... edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Herschel and Kapteyn did just that and other things, and concluded that the Ga ...
... edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Herschel and Kapteyn did just that and other things, and concluded that the Ga ...
Lab 9
... Objective: To demonstrate the classification of galaxies and to use a rational expression to figure out the distances to galaxies using redshift. The large-scale structure of the universe is governed by gravity. The Sun orbits the center of our galaxy, the Milky Way. The Milky Way, in turn, orbits t ...
... Objective: To demonstrate the classification of galaxies and to use a rational expression to figure out the distances to galaxies using redshift. The large-scale structure of the universe is governed by gravity. The Sun orbits the center of our galaxy, the Milky Way. The Milky Way, in turn, orbits t ...
Question paper and Solutions
... Solution: Retrograde motion of a planet. The apparent motion of a planet in direction opposite to that of other bodies (background stars), as observed from a Earth is called retrograde motion. (d) Each image below is showing same object but they are taken at different times. Explain what you see in ...
... Solution: Retrograde motion of a planet. The apparent motion of a planet in direction opposite to that of other bodies (background stars), as observed from a Earth is called retrograde motion. (d) Each image below is showing same object but they are taken at different times. Explain what you see in ...
Exercise 8
... Now, turn your attention to the spectra next to each galaxy shown in figure 8.1. The spectra show well-defined (laboratory) emission lines above and below the nearly continuous emission spectrum of the galaxy. The arrows a through f represent strong helium emission lines. 10. Which direction is tow ...
... Now, turn your attention to the spectra next to each galaxy shown in figure 8.1. The spectra show well-defined (laboratory) emission lines above and below the nearly continuous emission spectrum of the galaxy. The arrows a through f represent strong helium emission lines. 10. Which direction is tow ...
X-ray emission from supernova shock waves Tanja Kramer Nymark Department of Astronomy
... these stars were often seen as portents sent by the gods to herald some important event. So it was that the “guest star” observed by Chinese astronomers in 1054 AD was interpreted as a sign “that there is a person of great wisdom and virtue in the country”, while further north, in the Liao kingdom, ...
... these stars were often seen as portents sent by the gods to herald some important event. So it was that the “guest star” observed by Chinese astronomers in 1054 AD was interpreted as a sign “that there is a person of great wisdom and virtue in the country”, while further north, in the Liao kingdom, ...
Aldebaran
... contracted, a protostar was formed. Gravity caused the protostar to condense further and heat up. Nuclear reactions occurred when the temperature in the center of the protostar reached about 10 million degrees, and the star was born. Further expansion and heating of the star’s exterior then led to t ...
... contracted, a protostar was formed. Gravity caused the protostar to condense further and heat up. Nuclear reactions occurred when the temperature in the center of the protostar reached about 10 million degrees, and the star was born. Further expansion and heating of the star’s exterior then led to t ...
AST1100 Lecture Notes
... makes the pressure and thereby the temperature in the core higher than in the case of a low mass star. The forces of gravity are larger and therefore the pressure needs to by higher in order to maintain hydrostatic equilibrium. The carbon-oxygen core contracts, but before it gets degenerate the temp ...
... makes the pressure and thereby the temperature in the core higher than in the case of a low mass star. The forces of gravity are larger and therefore the pressure needs to by higher in order to maintain hydrostatic equilibrium. The carbon-oxygen core contracts, but before it gets degenerate the temp ...
Staring Back to Cosmic Dawn - UC-HiPACC
... complementing the data we’ll be getting from NASA’s James Webb Space Telescope. CANDELS has produced the largest sample of candidate galaxies that formed within the first 1 billion years of the universe’s existence. As of March 2014, the spectroscopic record-holder is a galaxy at a redshift of 7.51, ...
... complementing the data we’ll be getting from NASA’s James Webb Space Telescope. CANDELS has produced the largest sample of candidate galaxies that formed within the first 1 billion years of the universe’s existence. As of March 2014, the spectroscopic record-holder is a galaxy at a redshift of 7.51, ...
AST1100 Lecture Notes
... makes the pressure and thereby the temperature in the core higher than in the case of a low mass star. The forces of gravity are larger and therefore the pressure needs to by higher in order to maintain hydrostatic equilibrium. The carbon-oxygen core contracts, but before it gets degenerate the temp ...
... makes the pressure and thereby the temperature in the core higher than in the case of a low mass star. The forces of gravity are larger and therefore the pressure needs to by higher in order to maintain hydrostatic equilibrium. The carbon-oxygen core contracts, but before it gets degenerate the temp ...
Chapter 15: The Milky Way Galaxy
... Is the Sun moving through the Milky Way Galaxy and, if so, how fast? The Sun orbits the center of the Milky Way Galaxy at a speed of 828,000 km per hour. ...
... Is the Sun moving through the Milky Way Galaxy and, if so, how fast? The Sun orbits the center of the Milky Way Galaxy at a speed of 828,000 km per hour. ...
Chapter 17 Star Stuff How does a star`s mass affect nuclear fusion
... • Helium fusion rate skyrockets until thermal pressure takes over and expands core again ...
... • Helium fusion rate skyrockets until thermal pressure takes over and expands core again ...
Chapter 17 Star Stuff
... because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as white dwarfs • Intermediate ...
... because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot enough to fuse carbon nuclei, and end as white dwarfs • Intermediate ...
Regulus, June-July 1990 - RASC Kingston Centre
... on what we can do to keep our night skies. There are things that we all can do to prevent the spread of this daymare. If you only attend one meeting this year, make it this one. Perhaps, if we come forward as a group, we can do something. The trouble with Light Pollution is that it is a secondary fo ...
... on what we can do to keep our night skies. There are things that we all can do to prevent the spread of this daymare. If you only attend one meeting this year, make it this one. Perhaps, if we come forward as a group, we can do something. The trouble with Light Pollution is that it is a secondary fo ...
1: Properties of Pulsars
... where G is the gravitational constant. The period of the Crab pulsars hence requires a maximum radius of only 105 metres which is two orders of magnitude smaller than what is typical for white dwarfs. Only neutron stars were left as a possible explanation. Periods for radial oscillations of neutron ...
... where G is the gravitational constant. The period of the Crab pulsars hence requires a maximum radius of only 105 metres which is two orders of magnitude smaller than what is typical for white dwarfs. Only neutron stars were left as a possible explanation. Periods for radial oscillations of neutron ...
(Science 2012) Gal-Yam
... (11). SN 2005ap is the first exand, in some cases, copious ultraviolet (UV) flux, ciple, almost all SLSNe belong to one of two ample of the class defined below as SLSN-I. On SLSN events may become useful cosmic beacons spectroscopic classes: type IIn (hydrogen-rich 18 November 2006, TSS detected a b ...
... (11). SN 2005ap is the first exand, in some cases, copious ultraviolet (UV) flux, ciple, almost all SLSNe belong to one of two ample of the class defined below as SLSN-I. On SLSN events may become useful cosmic beacons spectroscopic classes: type IIn (hydrogen-rich 18 November 2006, TSS detected a b ...
AST1001.ch13
... The White Dwarf Limit • Quantum mechanics says that electrons must move faster as they are squeezed into a very small space. • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more ...
... The White Dwarf Limit • Quantum mechanics says that electrons must move faster as they are squeezed into a very small space. • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more ...
Systematics of Galaxy Properties and Scaling Relations Ay 127
... relative distances of galaxies and peculiar velocities: thus, it is really important to understand their intrinsic limitations of accuracy, e.g., environmental dependences ...
... relative distances of galaxies and peculiar velocities: thus, it is really important to understand their intrinsic limitations of accuracy, e.g., environmental dependences ...
Lecture 15 Star Formation and Evolution 3/7
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O • core of degenerate electrons builds up - opposes gravity • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole PHYS 162 ...
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O • core of degenerate electrons builds up - opposes gravity • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole PHYS 162 ...
Lecture Eleven (Powerpoint format)
... “clouds” from Latin) in their telescopes. The precise nature of these nebulae was the subject of intense speculation and debate. Since no one could see any individual stars in these using the smaller telescopes and less sensitive photographic plates of the 19th century, the consensus opinion was ...
... “clouds” from Latin) in their telescopes. The precise nature of these nebulae was the subject of intense speculation and debate. Since no one could see any individual stars in these using the smaller telescopes and less sensitive photographic plates of the 19th century, the consensus opinion was ...
History of supernova observation
The known history of supernova observation goes back to 185 CE, when, supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind. Several additional supernovae within the Milky Way galaxy have been recorded since that time, with SN 1604 being the most recent supernova to be observed in this galaxy.Since the development of the telescope, the field of supernova discovery has expanded to other galaxies. These occurrences provide important information on the distances of galaxies. Successful models of supernova behavior have also been developed, and the role of supernovae in the star formation process is now increasingly understood.