Slide 1
... When a star dies, if the core has less mass than 1.4 times the sun, it will form a white dwarf. Gravity is trying to squeeze the core as small as it can get. It's stopped by the pressure of electrons trying to repel each other. This pressure counteracts gravity. Over billions of years, this hot core ...
... When a star dies, if the core has less mass than 1.4 times the sun, it will form a white dwarf. Gravity is trying to squeeze the core as small as it can get. It's stopped by the pressure of electrons trying to repel each other. This pressure counteracts gravity. Over billions of years, this hot core ...
Slide 1
... IMFs for IC 348 and ONC are also similar from ILF modeling (Muench et al. 2003). But deep J-LF modeling of IC 348 by Preibisch et al. 2003 finds BD deficit like Taurus, not ONC! Yet they get BD fraction in agreement with Luhman et al. for IC348. ...
... IMFs for IC 348 and ONC are also similar from ILF modeling (Muench et al. 2003). But deep J-LF modeling of IC 348 by Preibisch et al. 2003 finds BD deficit like Taurus, not ONC! Yet they get BD fraction in agreement with Luhman et al. for IC348. ...
A COMPREHENSIVE COMPARISON OF THE SUN TO
... these conventions in Figs. 2 Y11. The solid curve and hatched area around it represents the IMF and its associated uncertainty ( Kroupa 2002). The Sun, indicated by the Sun symbol (), is more massive than 95% 2% of these stars. ...
... these conventions in Figs. 2 Y11. The solid curve and hatched area around it represents the IMF and its associated uncertainty ( Kroupa 2002). The Sun, indicated by the Sun symbol (), is more massive than 95% 2% of these stars. ...
WORD - Astrophysics
... Stars have focused the interest of astronomers for centuries. A great variety of observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that exp ...
... Stars have focused the interest of astronomers for centuries. A great variety of observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that exp ...
Telescopic Drawings or Photographs of Celestial
... • If more than one task completed the best mark counts • Each task marked using the same markscheme giving 2 marks out of 20 • The 20 marks are split into marks out of 5 for each of the four sections • Design /5 Observation /5 Analysis/5 Evaluation/5 • Design, analysis and evaluation completed under ...
... • If more than one task completed the best mark counts • Each task marked using the same markscheme giving 2 marks out of 20 • The 20 marks are split into marks out of 5 for each of the four sections • Design /5 Observation /5 Analysis/5 Evaluation/5 • Design, analysis and evaluation completed under ...
Statistical analysis of stellar evolution
... in Figure 1, we plot all but one of them in black. The one yellow star is a binary star called vB022 that we discuss in Section 5. Each star is plotted with 95% intervals representing the measurement errors in B − V and V . The star groups are less readily apparent than in Figure 1, largely because ...
... in Figure 1, we plot all but one of them in black. The one yellow star is a binary star called vB022 that we discuss in Section 5. Each star is plotted with 95% intervals representing the measurement errors in B − V and V . The star groups are less readily apparent than in Figure 1, largely because ...
Stellar Metamorphosis as Alternative to Nebular Hypothesis
... momentum loss of the Sun.[5] If the nebular model were correct and all the material in the solar system was formed from a giant spinning gas/dust cloud, then the Sun should have the majority of the angular momentum. This means it should spin much more rapidly. The mathematical models have failed to ...
... momentum loss of the Sun.[5] If the nebular model were correct and all the material in the solar system was formed from a giant spinning gas/dust cloud, then the Sun should have the majority of the angular momentum. This means it should spin much more rapidly. The mathematical models have failed to ...
Penn State Astronomy 11 Laboratory
... the closest and brightest stars, and what it shows about the nature of the stars. 10. The Lives of the Stars (page 63) — Stellar evolution and evolutionary states using astronomical data and luminosity-temperature diagrams. 11. The Structure of the Milky Way Galaxy (page 69) — Structure of our Milky ...
... the closest and brightest stars, and what it shows about the nature of the stars. 10. The Lives of the Stars (page 63) — Stellar evolution and evolutionary states using astronomical data and luminosity-temperature diagrams. 11. The Structure of the Milky Way Galaxy (page 69) — Structure of our Milky ...
Document
... Though some models suggested that the gamma-ray bursts were produced within our Galaxy (either very close to us or in a very extended halo), more recent observations have conclusively shown that most of them are actually in galaxies billions of light-years away. ...
... Though some models suggested that the gamma-ray bursts were produced within our Galaxy (either very close to us or in a very extended halo), more recent observations have conclusively shown that most of them are actually in galaxies billions of light-years away. ...
An Eclectic View of our Milky Way Galaxy
... for mapping spiral arms. Proper motion data in conjunction with the newly-estimated velocity components for the Sun’s motion imply a distance to the Galactic centre of R0 = 8.34 ± 0.27 kpc , consistent with recent estimates which average 8.24 ± 0.09 kpc. A cosinusoidal Galactic potential is not rule ...
... for mapping spiral arms. Proper motion data in conjunction with the newly-estimated velocity components for the Sun’s motion imply a distance to the Galactic centre of R0 = 8.34 ± 0.27 kpc , consistent with recent estimates which average 8.24 ± 0.09 kpc. A cosinusoidal Galactic potential is not rule ...
Chemical abundances and winds of massive stars in M31: a Btype
... et al. 1999). An investigation of the stellar wind properties of O-, B- and A-type supergiants in Local Group galaxies with welldefined distances will, therefore, allow us to test the concept of the WLR and its applicability for distance determinations. Numerous surveys have identified OB and WR sta ...
... et al. 1999). An investigation of the stellar wind properties of O-, B- and A-type supergiants in Local Group galaxies with welldefined distances will, therefore, allow us to test the concept of the WLR and its applicability for distance determinations. Numerous surveys have identified OB and WR sta ...
AUGUSTE COMTE`S BLUNDER: AN ACCOUNT OF THE FIRST
... this next step—the application of spectroscopy to stars, in the same way as Kirchhoff had done for the Sun—a natural one to undertake. The first person to embark on observing stellar spectra in the 1860s was Giovanni Donati (1826 –1873) in Florence. He used a single prism spectroscope on his 41-cm r ...
... this next step—the application of spectroscopy to stars, in the same way as Kirchhoff had done for the Sun—a natural one to undertake. The first person to embark on observing stellar spectra in the 1860s was Giovanni Donati (1826 –1873) in Florence. He used a single prism spectroscope on his 41-cm r ...
Using time to measure distance - AS-A2
... sky. They were both in the south at midnight, which means that the Earth was directly between them and the Sun. This is called an ‘opposition’. It also means that the two planets were both at the same time at their closest to the Earth. At this time Jupiter was the brightest object in the night sky ...
... sky. They were both in the south at midnight, which means that the Earth was directly between them and the Sun. This is called an ‘opposition’. It also means that the two planets were both at the same time at their closest to the Earth. At this time Jupiter was the brightest object in the night sky ...
PowerPoint プレゼンテーション
... phase (class I and II) Dissipation of PPD/Planet formation; late phase (class II and III) Disks around massive stars and brown dwarfs. LAB, France 07.01.2009 ...
... phase (class I and II) Dissipation of PPD/Planet formation; late phase (class II and III) Disks around massive stars and brown dwarfs. LAB, France 07.01.2009 ...
PLANETS
... Some stunning individual systems have been reported (Marois et al. 2010, Lagrange et al. 2010), but the surveys indicate that fewer planets are found than would be predicted by extrapolating the power-law (of Eqn. (1) – see next lecture) out to 10-100 AU ...
... Some stunning individual systems have been reported (Marois et al. 2010, Lagrange et al. 2010), but the surveys indicate that fewer planets are found than would be predicted by extrapolating the power-law (of Eqn. (1) – see next lecture) out to 10-100 AU ...
ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater⋆†
... No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new satellite should be classified as a dwarf galaxy with unusual properties. Note that only 10◦ ...
... No globular cluster has ever accomplished the feat of prolonging its star formation by several Gyr. Therefore, if our hypothesis that the blue bright stars in Crater are blue loop giants is correct, the new satellite should be classified as a dwarf galaxy with unusual properties. Note that only 10◦ ...
PDF format
... – An H-R diagram plots stellar luminosity of stars versus surface temperature (or color or spectral type). • What is the significance of the main sequence? – Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. – A star's mass determines its position along t ...
... – An H-R diagram plots stellar luminosity of stars versus surface temperature (or color or spectral type). • What is the significance of the main sequence? – Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. – A star's mass determines its position along t ...
Chapter 15: The Milky Way Galaxy
... Earth’s location in the Milky Way how interstellar gas and dust enable star formation to continue in our Galaxy that observations reveal the presence of significant mass in the Milky Way that astronomers have yet to identify that there is a black hole at the center of our Galaxy ...
... Earth’s location in the Milky Way how interstellar gas and dust enable star formation to continue in our Galaxy that observations reveal the presence of significant mass in the Milky Way that astronomers have yet to identify that there is a black hole at the center of our Galaxy ...
ISIMA lectures on celestial mechanics. 3
... that in principle arbitrarily small external forces can lead to large changes in the orbit. In practice, when the perturber is sufficiently weak, either the oscillation period becomes longer than the age of the system, or other sources of precession—additional planets or general relativity—become st ...
... that in principle arbitrarily small external forces can lead to large changes in the orbit. In practice, when the perturber is sufficiently weak, either the oscillation period becomes longer than the age of the system, or other sources of precession—additional planets or general relativity—become st ...
Spectroscopy: Unlocking the Secrets of Star Light
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
Spectroscopy: Unlocking the Secrets of Star Light
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
June - Fort Worth Astronomical Society
... Lupus contains two stars with known planets and no Messier objects. The brightest star in the constellation is Men, Alpha Lupi, with an apparent visual magnitude of 2.30. There are no meteor showers associated with the constellation. Lupus belongs to the Hercules family of constellations, along with ...
... Lupus contains two stars with known planets and no Messier objects. The brightest star in the constellation is Men, Alpha Lupi, with an apparent visual magnitude of 2.30. There are no meteor showers associated with the constellation. Lupus belongs to the Hercules family of constellations, along with ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.