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... Big planets can interact with the disk Tides between the disk and the planet cause the planet to slowly spiral towards the star. So they can form near 5 AU and then migrate in to near the star. This pushes the inner disk into the star. ...
... Big planets can interact with the disk Tides between the disk and the planet cause the planet to slowly spiral towards the star. So they can form near 5 AU and then migrate in to near the star. This pushes the inner disk into the star. ...
Introduction to Electromagnetism
... • Absolute magnitude M is what a star would have if it stood at a distance of d=10 pc from Earth. ...
... • Absolute magnitude M is what a star would have if it stood at a distance of d=10 pc from Earth. ...
ASTR 5340: Radio Astronomy Problem Set 1 Due: 13 September
... 2. (5 points) The blue star Rigel (β Orionis, the right foot of Orion) is another supergiant star that is about as luminous as Betelgeuse (both have bolometric luminosities L ≈ 105 L⊙ ) and lies at about the same distance, but Rigel is much hotter, TR ≈ 11, 000 K, versus TB ≈ 3, 600 K for Betelgeuse ...
... 2. (5 points) The blue star Rigel (β Orionis, the right foot of Orion) is another supergiant star that is about as luminous as Betelgeuse (both have bolometric luminosities L ≈ 105 L⊙ ) and lies at about the same distance, but Rigel is much hotter, TR ≈ 11, 000 K, versus TB ≈ 3, 600 K for Betelgeuse ...
Powerpoint Draft for today
... We form a "spectrum" by spreading out radiation according to its wavelength (e.g. using a prism for light). What does the spectrum of an astronomical object's radiation look like? Many objects (e.g. stars) have roughly a "Black-body" spectrum: ...
... We form a "spectrum" by spreading out radiation according to its wavelength (e.g. using a prism for light). What does the spectrum of an astronomical object's radiation look like? Many objects (e.g. stars) have roughly a "Black-body" spectrum: ...
Powerpoint
... Need iron core rotation at death to correspond to a pulsar of < 5 ms period if rotation and B-fields are to matter. This is much faster than observed in common pulsars. A concern: If calculate the presupernova evolution with the same efficient magnetic field generating algorithms as used in some cor ...
... Need iron core rotation at death to correspond to a pulsar of < 5 ms period if rotation and B-fields are to matter. This is much faster than observed in common pulsars. A concern: If calculate the presupernova evolution with the same efficient magnetic field generating algorithms as used in some cor ...
Blackbody Radiation
... of the star’s energy output—and the wavelength at which this occurs—called the peak wavelength. For example, if Star A and Star B are the same size and temperature, they will have identical blackbody curves. If Star C is the same size as A and B but is cooler, its energy output is reduced at all wav ...
... of the star’s energy output—and the wavelength at which this occurs—called the peak wavelength. For example, if Star A and Star B are the same size and temperature, they will have identical blackbody curves. If Star C is the same size as A and B but is cooler, its energy output is reduced at all wav ...
Cosmology and Astrophysics II
... galaxies collide when their host galaxies merge. August 1, 2002 ...
... galaxies collide when their host galaxies merge. August 1, 2002 ...
Gizmos: H-R Diagrams
... 2. Organize: Compare the colors of the following stars in the Star collection: Aldebaran, Betelgeuse, Sirius B, Spica, the Sun, and Vega. Drag the six stars to position them where you think they would fit on the Gizmo’s color scale. Click Sort stars on the Gizmo to check your placements. Mark the lo ...
... 2. Organize: Compare the colors of the following stars in the Star collection: Aldebaran, Betelgeuse, Sirius B, Spica, the Sun, and Vega. Drag the six stars to position them where you think they would fit on the Gizmo’s color scale. Click Sort stars on the Gizmo to check your placements. Mark the lo ...
Document
... •If lifetime is forever once it starts. It took on Earth almost 5 billion years for communicative technology to get started. The Sun will live 10 billion years. 9. Longevity of the technological society, (0.5) 5106 stars. ...
... •If lifetime is forever once it starts. It took on Earth almost 5 billion years for communicative technology to get started. The Sun will live 10 billion years. 9. Longevity of the technological society, (0.5) 5106 stars. ...
PY3A06 Astronomical On-line Notes
... comparing it with the theoretical Maxwellian distribution. • Note that the temperature of the radiation (e.g., from a nearby star) may be very different from that of the particles. For example: – The plasma may be partially transparent, so that more energetic radiation passes straight through – Part ...
... comparing it with the theoretical Maxwellian distribution. • Note that the temperature of the radiation (e.g., from a nearby star) may be very different from that of the particles. For example: – The plasma may be partially transparent, so that more energetic radiation passes straight through – Part ...
G485 5.5.1 Structure of the Universe
... by direct visual observation. This is because of their relatively small size and the tremendous distances from one star to another. Proxima Centauri, the closest star to the Sun, is 4.5 light-years away, so if it has planets in orbit around it, they would not be visible even using the most powerful ...
... by direct visual observation. This is because of their relatively small size and the tremendous distances from one star to another. Proxima Centauri, the closest star to the Sun, is 4.5 light-years away, so if it has planets in orbit around it, they would not be visible even using the most powerful ...
Galaxy - Bama.ua.edu
... • Andromeda galaxy as it was about 2 million yr ago. • If we look ~14 billion LY away, expect to see universe in its early, hot, compressed, uniform gas state. ...
... • Andromeda galaxy as it was about 2 million yr ago. • If we look ~14 billion LY away, expect to see universe in its early, hot, compressed, uniform gas state. ...
02-02Stars_Part_One
... Concept 2 – Apparent Magnitude - m The idea here is that a ratio of apparent brightness of 100, would lead to a difference in apparent magnitude of 5. Note that the dimmer the star, the bigger m is. ...
... Concept 2 – Apparent Magnitude - m The idea here is that a ratio of apparent brightness of 100, would lead to a difference in apparent magnitude of 5. Note that the dimmer the star, the bigger m is. ...
Incredible Shrinking Stars
... smaller than the stellar core. The stellar core was rotating (because it was part of a rotating star). When the core collapses, the rotation is concentrated (sort of) in the neutron. Consequently, tbe neutron star ends up spinning very rapidly 4. The interior of a neutron star consists of neutrons. ...
... smaller than the stellar core. The stellar core was rotating (because it was part of a rotating star). When the core collapses, the rotation is concentrated (sort of) in the neutron. Consequently, tbe neutron star ends up spinning very rapidly 4. The interior of a neutron star consists of neutrons. ...
Review 3 - Physics and Astronomy
... • Earth’s atmosphere largely transparent • Can penetrate dusty regions of interstellar space • Observations in daytime as well as at night • High resolution requires large telescopes Surface of planets (Venus) Planetary magnetic fields Structure of Milky Way and other galaxies ...
... • Earth’s atmosphere largely transparent • Can penetrate dusty regions of interstellar space • Observations in daytime as well as at night • High resolution requires large telescopes Surface of planets (Venus) Planetary magnetic fields Structure of Milky Way and other galaxies ...
The Genesis of the Elements
... How the universe was formed? How the various elements were formed? Why the different elements and their isotopes occur in the relative abundance we ...
... How the universe was formed? How the various elements were formed? Why the different elements and their isotopes occur in the relative abundance we ...
The Milky Way
... A Black Hole at the Center of Our Galaxy 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 ~ 3 million solar masses ...
... A Black Hole at the Center of Our Galaxy 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 ~ 3 million solar masses ...
Astronomy 112: The Physics of Stars Class 9 Notes: Polytropes With
... such stars. To see why, consider what their position on the HR diagram and their masses tells us about them. Observations of white dwarfs in binary systems imply that they have masses comparable to the mass of the Sun. On the other hand, their extremely low luminosities, combined with surface temper ...
... such stars. To see why, consider what their position on the HR diagram and their masses tells us about them. Observations of white dwarfs in binary systems imply that they have masses comparable to the mass of the Sun. On the other hand, their extremely low luminosities, combined with surface temper ...
Stars and Constellations
... For the people in the Native American southwest, the sky is not something remote from Earth. Rather, it is a unifying whole, both a window into the universe and an instrument for understanding and measuring its rhythms. Indian people have been watching the sky for many generations and applying its s ...
... For the people in the Native American southwest, the sky is not something remote from Earth. Rather, it is a unifying whole, both a window into the universe and an instrument for understanding and measuring its rhythms. Indian people have been watching the sky for many generations and applying its s ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.