Low mass stars
... How do we obtain the mass of stars? – use binary star systems and Kepler’s 3rd Law (for visible binaries – for spectroscopic binaries the orbital inclination needs to be known). Eclipsing binaries are even better! The method is the same as used to calculate the properties of extrasolar planets. As w ...
... How do we obtain the mass of stars? – use binary star systems and Kepler’s 3rd Law (for visible binaries – for spectroscopic binaries the orbital inclination needs to be known). Eclipsing binaries are even better! The method is the same as used to calculate the properties of extrasolar planets. As w ...
Dark Matter: Observational Constraints Properties of Dark Matter:
... • Hot, X-ray emitting gas is observed to be insufficient • Warm, 104 K ionized gas emits by bremstrahlung. If in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; i ...
... • Hot, X-ray emitting gas is observed to be insufficient • Warm, 104 K ionized gas emits by bremstrahlung. If in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; i ...
Modified True/False - Indicate whether the statement is true or false
... ____ 18. HS-ESS1-1 Small, massive, dense object that has gravity so immense that nothing—not even light— can escape it a. Black dwarf c. Black hole b. Black hole Black hole d. Giant ____ 19. HS-ESS1-2 A star that is gravitationally bound to another star can either be part of a star cluster or a ____ ...
... ____ 18. HS-ESS1-1 Small, massive, dense object that has gravity so immense that nothing—not even light— can escape it a. Black dwarf c. Black hole b. Black hole Black hole d. Giant ____ 19. HS-ESS1-2 A star that is gravitationally bound to another star can either be part of a star cluster or a ____ ...
Opakování z minulého cvičení
... The key discovery that led to the development of spectroscopy was made by the German physicist Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in ...
... The key discovery that led to the development of spectroscopy was made by the German physicist Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in ...
Chapter 17 Star Stuff
... • This double-shell burning stage never reaches equilibrium—fusion rate periodically spikes upward in a series of thermal pulses ...
... • This double-shell burning stage never reaches equilibrium—fusion rate periodically spikes upward in a series of thermal pulses ...
PDF format
... d) It depends on the standard candle: if they are Cepheid variables, they will still pulsate at the same rate no matter what distance they are from you. © 2014 Pearson Education, Inc. ...
... d) It depends on the standard candle: if they are Cepheid variables, they will still pulsate at the same rate no matter what distance they are from you. © 2014 Pearson Education, Inc. ...
Chapter 17 Star Stuff How does a star`s mass affect nuclear fusion
... 5. Planetary Nebula leaves white dwarf behind ...
... 5. Planetary Nebula leaves white dwarf behind ...
Ch 13 Death of Stars(4-5?-13)
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
Ch. 13 Death of Stars(11-16-10)-3
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
19_Testbank - Lick Observatory
... D) the theory that hot, ionized gas blown out of the galactic disk and into the halo by superbubbles cools down and falls back into the disk E) none of the above Answer: D 22) What evidence supports the galactic fountain model? A) We see a jet of ionized gas shooting out of the bulge of our galaxy. ...
... D) the theory that hot, ionized gas blown out of the galactic disk and into the halo by superbubbles cools down and falls back into the disk E) none of the above Answer: D 22) What evidence supports the galactic fountain model? A) We see a jet of ionized gas shooting out of the bulge of our galaxy. ...
We Are Made of Stardust
... is far more complicated, with some of the less abundant elements of these intermediate atomic weights actually formed during the decay of iron into lighter elements during the supernova phase, to be discussed next. The blue-white star Rigel (the left foot of Orion the Hunter) is the 7th brightest st ...
... is far more complicated, with some of the less abundant elements of these intermediate atomic weights actually formed during the decay of iron into lighter elements during the supernova phase, to be discussed next. The blue-white star Rigel (the left foot of Orion the Hunter) is the 7th brightest st ...
Quasars: Back to the Infant Universe
... What are Seyferts and Radio Galaxies? What is at the center of a galaxy that powers a quasar? Why are there few quasars close to us? Could quasars ever have existed close to us? Why is gas important? What is the merger cycle that drives quasars? Why is a quasar a phase in time rather than an object ...
... What are Seyferts and Radio Galaxies? What is at the center of a galaxy that powers a quasar? Why are there few quasars close to us? Could quasars ever have existed close to us? Why is gas important? What is the merger cycle that drives quasars? Why is a quasar a phase in time rather than an object ...
on the mass distribution of stars in the solar neighbourhood
... seem very acceptable, but, nevertheless, they deserve comments. Namely, as will be seen below, the upper limit is rather a theoretical value since very massive stars, though easily detectable, are very rare indeed, or more precisely, extremely massive stars are extremely rare. This seems to be a wel ...
... seem very acceptable, but, nevertheless, they deserve comments. Namely, as will be seen below, the upper limit is rather a theoretical value since very massive stars, though easily detectable, are very rare indeed, or more precisely, extremely massive stars are extremely rare. This seems to be a wel ...
Draft Science Cases for KPAO
... very large telescopes (8-10m). The first such Natural Guide Star (NGS) system saw its “first light” on the Keck II telescope in February 1999. Six years of development and operations have highlighted some limitations of first generation concepts and early technology, but operations and astrophysical ...
... very large telescopes (8-10m). The first such Natural Guide Star (NGS) system saw its “first light” on the Keck II telescope in February 1999. Six years of development and operations have highlighted some limitations of first generation concepts and early technology, but operations and astrophysical ...
Astronomy 114 – Summary of Important Concepts #2 1 Stars: key
... Q: A star has an absolute magnitude of 4 and lies 1 parsec from the Earth. Suppose that star is moved to a distance of 10 parsecs from the Sun. What is its absolute magnitude? A: The absolute magnitude is still 4. Absolute magnitude does not depend on distance. It measures the luminosity of the star ...
... Q: A star has an absolute magnitude of 4 and lies 1 parsec from the Earth. Suppose that star is moved to a distance of 10 parsecs from the Sun. What is its absolute magnitude? A: The absolute magnitude is still 4. Absolute magnitude does not depend on distance. It measures the luminosity of the star ...
chapter 24 instructor notes
... for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olb ...
... for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olb ...
Lab 2
... -Cass: A Be emission line-star. Antares ( Sco). A red supergiant. P-Cygni: A mass losing supergiant. This is about mV ~ 5 and will require long exposures. Do only the part of the spectrum centered on H-alpha. Jupiter: This planet is now available. I want to see if we can (a) detect the [SII] 67 ...
... -Cass: A Be emission line-star. Antares ( Sco). A red supergiant. P-Cygni: A mass losing supergiant. This is about mV ~ 5 and will require long exposures. Do only the part of the spectrum centered on H-alpha. Jupiter: This planet is now available. I want to see if we can (a) detect the [SII] 67 ...
Practice Exam for 3 rd Astronomy Exam
... In the Milky Way Galaxy there are very many Giant Molecular Clouds (GMC). A typical GMC contains most hydrogen and helium gas and microscopic solid particles of ice and rocky material known collectively as “dust”. The typical GMC may be 300 ly in diameter and encompass 300,000 solar masses of gas an ...
... In the Milky Way Galaxy there are very many Giant Molecular Clouds (GMC). A typical GMC contains most hydrogen and helium gas and microscopic solid particles of ice and rocky material known collectively as “dust”. The typical GMC may be 300 ly in diameter and encompass 300,000 solar masses of gas an ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.