The Interstellar Medium
... • Detected in radio from high n transitions in hydrogen. Also optical emission in Balmer and Lyman series. ...
... • Detected in radio from high n transitions in hydrogen. Also optical emission in Balmer and Lyman series. ...
Physics- HSC- Module 9.7 Astrophysics
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
Star Formation in the Local Milky Way
... 1978, Kroupa 2002, Chabrier 2003). In addition, infrared studies of local, very young star clusters provided independent determinations of the IMF over an even larger dynamic range in mass, from the deuterium burning limit to OB stars (e.g., Muench et al. 2002). These studies have found that the sha ...
... 1978, Kroupa 2002, Chabrier 2003). In addition, infrared studies of local, very young star clusters provided independent determinations of the IMF over an even larger dynamic range in mass, from the deuterium burning limit to OB stars (e.g., Muench et al. 2002). These studies have found that the sha ...
α Centauri: a double star - University of Canterbury
... Three ways of finding Earth-like planets 1. The Doppler method: periodic radial-velocity variation of a star, detected spectroscopically • 346 planets orbiting 294 stars discovered since 1995 • Most are Jupiter-mass objects (~300 MEarth ) • Lowest mass is Gliese 581e (mass ≥ 1.94 MEarth) at 0.03 AU ...
... Three ways of finding Earth-like planets 1. The Doppler method: periodic radial-velocity variation of a star, detected spectroscopically • 346 planets orbiting 294 stars discovered since 1995 • Most are Jupiter-mass objects (~300 MEarth ) • Lowest mass is Gliese 581e (mass ≥ 1.94 MEarth) at 0.03 AU ...
Absolute Magnitudes of Supernovae
... supernovae are a particular type of exploding star that contains no hydrogen lines in its spectrum). The units on the x-axis are days, and on the y-axis are apparent magnitude. Each supernova was monitored for several weeks so that its rise to maximum light and its subsequent decline in brightness w ...
... supernovae are a particular type of exploding star that contains no hydrogen lines in its spectrum). The units on the x-axis are days, and on the y-axis are apparent magnitude. Each supernova was monitored for several weeks so that its rise to maximum light and its subsequent decline in brightness w ...
ppt
... disk into internal and external remnants. The mass of the interior and exterior disk depends on the age of the disk. The concept that giant planet migration would eliminate all the mass in its swept zone is not supported by the results. The inner part clears completly if the giant moves inside 0.05 ...
... disk into internal and external remnants. The mass of the interior and exterior disk depends on the age of the disk. The concept that giant planet migration would eliminate all the mass in its swept zone is not supported by the results. The inner part clears completly if the giant moves inside 0.05 ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... was distributed through space, we had to focus on their distribution. Since faint galaxies could be seen right to the limit of the largest telescopes, it became clear that the Universe was much larger than we had thought and we had not yet come even close to seeing to its edge, if it had one! ...
... was distributed through space, we had to focus on their distribution. Since faint galaxies could be seen right to the limit of the largest telescopes, it became clear that the Universe was much larger than we had thought and we had not yet come even close to seeing to its edge, if it had one! ...
Advanced STARS - WordPress.com
... It is 2 ½ times larger than all the other planets in the solar system combined It has the shortest day of all the planets: 9 hours and 55 minutes It orbits the sun once every 11.8 earth years It’s atmosphere is divided into cloud belts and zones. The Great Red Spot is a huge storm on Jupit ...
... It is 2 ½ times larger than all the other planets in the solar system combined It has the shortest day of all the planets: 9 hours and 55 minutes It orbits the sun once every 11.8 earth years It’s atmosphere is divided into cloud belts and zones. The Great Red Spot is a huge storm on Jupit ...
How we found about BLACK HOLES
... If all stars are less than 1·4 times the mass of our Sun to begin with, then everything would be easily explained. The stars would all eventually become white dwarfs just as our Sun will. The trouble is that some stars have more mass than that. About 2·5 percent of all the stars in the sky are more ...
... If all stars are less than 1·4 times the mass of our Sun to begin with, then everything would be easily explained. The stars would all eventually become white dwarfs just as our Sun will. The trouble is that some stars have more mass than that. About 2·5 percent of all the stars in the sky are more ...
Computer Modeling the Line of Sight Column Densities of Polars
... Polars are a type of CV that has a strong magnetic field around 100 million times earths magnetic field. The plasma is not allowed to form an accretion disc because it follows the magnetic field lines. The stream takes a more direct path toward the white dwarf. The high speeds of the impacting parti ...
... Polars are a type of CV that has a strong magnetic field around 100 million times earths magnetic field. The plasma is not allowed to form an accretion disc because it follows the magnetic field lines. The stream takes a more direct path toward the white dwarf. The high speeds of the impacting parti ...
Conference Summary Richard Ellis (Caltech) ITALIA
... • Masses and colors of z~2-3 red galaxies (Henriques, Conselice) • Evidence of star formation thresholds (Faber) • Timescale of truncation and AGN feedback (Somerville, Faber) • Morphology versus color (red disks) ...
... • Masses and colors of z~2-3 red galaxies (Henriques, Conselice) • Evidence of star formation thresholds (Faber) • Timescale of truncation and AGN feedback (Somerville, Faber) • Morphology versus color (red disks) ...
Studies of young stellar objects (25+5)
... masses and a radius of 1,000 AU for the disk (Franco-Hernandez et al. 2007). Most massive young star known with jets, disk, and large scale infall. ...
... masses and a radius of 1,000 AU for the disk (Franco-Hernandez et al. 2007). Most massive young star known with jets, disk, and large scale infall. ...
The Hubble Redshift Distance Relation
... All galaxies are getting farther and farther apart all the time! ...
... All galaxies are getting farther and farther apart all the time! ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.