Gravitational redshifts
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
Stars - Lauer Science
... elements is called nuclear fusion During nuclear fusion, two or more atoms of one element combine to form one atom of a different element ...
... elements is called nuclear fusion During nuclear fusion, two or more atoms of one element combine to form one atom of a different element ...
Lecture Eight (Powerpoint format) - Flash
... Molecules in Space Instead, astronomers found that molecules were very common in interstellar space -- particularly CO and NH3. The most common molecule in interstellar space -- H2 -- doesn’t emit this type of radio emission and so is nearly invisible. CO Map of Horsehead Nebula (BIMA/M. Pound) ...
... Molecules in Space Instead, astronomers found that molecules were very common in interstellar space -- particularly CO and NH3. The most common molecule in interstellar space -- H2 -- doesn’t emit this type of radio emission and so is nearly invisible. CO Map of Horsehead Nebula (BIMA/M. Pound) ...
Astronomy Homework - Life
... have enough mass to allow temperatures high enough for carbon fusion. 19. The temperature at which carbon will fuse is (100,000,000°°K/600,000,000°°K). 20. The carbon core of a star becomes degenerate which means (it cannot be squeezed any further/its about to do a bad thing). 20. Stars that begin t ...
... have enough mass to allow temperatures high enough for carbon fusion. 19. The temperature at which carbon will fuse is (100,000,000°°K/600,000,000°°K). 20. The carbon core of a star becomes degenerate which means (it cannot be squeezed any further/its about to do a bad thing). 20. Stars that begin t ...
Astronomy Merit Badge Workshop
... Using a Star Finder (also called a Planisphere), go outside on a clear night, set the correct time and date, and orient yourself so that you and the Star Finder are aligned to true north.* The visible field in your Star Finder should roughly correspond to what you see in the night sky. Pick out 10 c ...
... Using a Star Finder (also called a Planisphere), go outside on a clear night, set the correct time and date, and orient yourself so that you and the Star Finder are aligned to true north.* The visible field in your Star Finder should roughly correspond to what you see in the night sky. Pick out 10 c ...
Clear Skies - Cowichan Valley Starfinders Society
... the original star might have contained 150 times the mass of our Sun; only the first generation of stars that formed after the Big Bang were thought to be this massive. It was the Chandra X-Ray observations that helped distinguish the supernova as originating from a massive star, and not the Type 1A ...
... the original star might have contained 150 times the mass of our Sun; only the first generation of stars that formed after the Big Bang were thought to be this massive. It was the Chandra X-Ray observations that helped distinguish the supernova as originating from a massive star, and not the Type 1A ...
Test - Scioly.org
... A special type of object F that young stars undergo stages of about 10-20 times before entering the main-sequence. ...
... A special type of object F that young stars undergo stages of about 10-20 times before entering the main-sequence. ...
The View From Earth
... 10. A star that rises directly east must set directly west. A star that is observed to set in the southwest must have risen in the southeast. 11. b) One day. 12. The celestial pole coincides with the horizon at either pole. 13. If no visible stars are circumpolar, you would be standing on Earth’s eq ...
... 10. A star that rises directly east must set directly west. A star that is observed to set in the southwest must have risen in the southeast. 11. b) One day. 12. The celestial pole coincides with the horizon at either pole. 13. If no visible stars are circumpolar, you would be standing on Earth’s eq ...
Stages in the Life of a Star
... (A)The core of a star begins to shrink as a star uses up the hydrogen in its core. This compresses and heats the core. (B)The heated core ignites the surrounding gas to make a shell source, and the outer layers of the star expand, turning it into a red giant. ...
... (A)The core of a star begins to shrink as a star uses up the hydrogen in its core. This compresses and heats the core. (B)The heated core ignites the surrounding gas to make a shell source, and the outer layers of the star expand, turning it into a red giant. ...
VLA 90 cm Brogan et al. (2006)
... Summary • Stars shine through nuclear fusion • Stars make all elements heavier than Hydrogen • When they run out of fuel : • Low mass stars like the sun will turn into white dwarfs while their outer layers form planetary nebula • Much more massive stars produce a supernova and supernova remnants • ...
... Summary • Stars shine through nuclear fusion • Stars make all elements heavier than Hydrogen • When they run out of fuel : • Low mass stars like the sun will turn into white dwarfs while their outer layers form planetary nebula • Much more massive stars produce a supernova and supernova remnants • ...
Gravity
... According to the graph above, the gravitational field strength in Banff, AB is ______ N/kg. (Record your three-digit answer on the answer sheet.) 22. The largest single rock brought back by Apollo mission astronauts is the Big Muley. If this moon rock had a weight of 18.95 N on the Moon (a = 1.62 N ...
... According to the graph above, the gravitational field strength in Banff, AB is ______ N/kg. (Record your three-digit answer on the answer sheet.) 22. The largest single rock brought back by Apollo mission astronauts is the Big Muley. If this moon rock had a weight of 18.95 N on the Moon (a = 1.62 N ...
Document
... rebound and explosion of the core. • From start of collapse to now: 1 second! • Matter thrown back into the interstellar medium. • Matter rushing outwards, fuses with matter rushing inwards. • Every element after Fe is made in the instant of a supernova! ...
... rebound and explosion of the core. • From start of collapse to now: 1 second! • Matter thrown back into the interstellar medium. • Matter rushing outwards, fuses with matter rushing inwards. • Every element after Fe is made in the instant of a supernova! ...
18 O
... – cloud mass of 1.6 M◉ – approximate pre-collapse evolution as a series of Bonner-Ebert solutions with increasing condensation on a timescale of 1 Myr – use Shu 1977 “inside-out” collapse model – examine evolution of chemistry in the context of physical evolution (i.e.. cold phase - star turn on - w ...
... – cloud mass of 1.6 M◉ – approximate pre-collapse evolution as a series of Bonner-Ebert solutions with increasing condensation on a timescale of 1 Myr – use Shu 1977 “inside-out” collapse model – examine evolution of chemistry in the context of physical evolution (i.e.. cold phase - star turn on - w ...
The Ever-Changing Sky
... the day-night cycle every day. Night after night, the pattern of the stars seems identical, yet it changes with the seasons. The motions of some of the celestial objects don’t seem to follow that of the others… ...
... the day-night cycle every day. Night after night, the pattern of the stars seems identical, yet it changes with the seasons. The motions of some of the celestial objects don’t seem to follow that of the others… ...
final fate of a massive star
... As the star collapses, an `event horizon' of gravity can possibly develop as the shrinkage of the star progresses. The horizon is essentially a kind of one way membrane that allows entry, but no exits are permitted. In such a case, if the star enters the horizon before it collapsed to singularity, t ...
... As the star collapses, an `event horizon' of gravity can possibly develop as the shrinkage of the star progresses. The horizon is essentially a kind of one way membrane that allows entry, but no exits are permitted. In such a case, if the star enters the horizon before it collapsed to singularity, t ...
2.64 3.26156 8.61 pc ly × =
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
nucleosynthesis_oct28
... 1859 – Spectroscopic analysis of solar atmospheric chemistry 1868 – First measurement of a stellar Doppler shift 1925 – The sun is mostly hydrogen and helium! Modern theories of the origin of the chemical elements Big Bang Nucleosynthesis Stellar Nucleosynthesis The origin of mass? ...
... 1859 – Spectroscopic analysis of solar atmospheric chemistry 1868 – First measurement of a stellar Doppler shift 1925 – The sun is mostly hydrogen and helium! Modern theories of the origin of the chemical elements Big Bang Nucleosynthesis Stellar Nucleosynthesis The origin of mass? ...
White Dwarfs - Indiana University
... Upper mass limit for white dwarf formation is somewhere between 5-9 solar masses – “Inside every red giant is a white dwarf waiting to get out” (Warner) Most have C-O cores, most massive may have O-Ne cores In hot, pre-white dwarfs, neutrinos dominate energy loss When nuclear burning stops, photon c ...
... Upper mass limit for white dwarf formation is somewhere between 5-9 solar masses – “Inside every red giant is a white dwarf waiting to get out” (Warner) Most have C-O cores, most massive may have O-Ne cores In hot, pre-white dwarfs, neutrinos dominate energy loss When nuclear burning stops, photon c ...