Geometry Questions
... 1. What is the acceleration due to gravity on the surface of a white dwarf? Let the mass of a white dwarf by approximately 1 solar mass, or 2.0 x 1030 kg, and its radius be approximately that of Earth or 6.4 x 106 m. (J63) 2. What is the acceleration due to gravity on the surface of a neutron star? ...
... 1. What is the acceleration due to gravity on the surface of a white dwarf? Let the mass of a white dwarf by approximately 1 solar mass, or 2.0 x 1030 kg, and its radius be approximately that of Earth or 6.4 x 106 m. (J63) 2. What is the acceleration due to gravity on the surface of a neutron star? ...
The Virial Theorem - Harvard-Smithsonian Center for Astrophysics
... circular orbit T = 2πr/vc = (3π/Gρ)1/2 ...
... circular orbit T = 2πr/vc = (3π/Gρ)1/2 ...
Origin and Formation of the Universe – PowerPoint notes
... C. Inflationary Theory – predicts that there was a ________________________________ when the universe was very young, more extreme than predicted by ___________________________________! 1. Considered to be a ____________________ Big Bang Theory. 2. The universe ____________________ and _____________ ...
... C. Inflationary Theory – predicts that there was a ________________________________ when the universe was very young, more extreme than predicted by ___________________________________! 1. Considered to be a ____________________ Big Bang Theory. 2. The universe ____________________ and _____________ ...
Origin and Formation of the Universe – PowerPoint notes I
... C. Inflationary Theory – predicts that there was a ________________________________ when the universe was very young, more extreme than predicted by ___________________________________! 1. Considered to be a ____________________ Big Bang Theory. 2. The universe ____________________ and _____________ ...
... C. Inflationary Theory – predicts that there was a ________________________________ when the universe was very young, more extreme than predicted by ___________________________________! 1. Considered to be a ____________________ Big Bang Theory. 2. The universe ____________________ and _____________ ...
Origin of the Universe
... • 170,000 yr ago Supernova 1987a explodes – A star explodes in a dwarf galaxy known as the Large Magellanic Cloud that lies just beyond the Milky Way. The star, known in modern times as Sanduleak 69-202, is a blue supergiant 25 times more massive than our Sun. Such explosions distribute all the comm ...
... • 170,000 yr ago Supernova 1987a explodes – A star explodes in a dwarf galaxy known as the Large Magellanic Cloud that lies just beyond the Milky Way. The star, known in modern times as Sanduleak 69-202, is a blue supergiant 25 times more massive than our Sun. Such explosions distribute all the comm ...
word document - FacStaff Home Page for CBU
... In the last section we looked at the stars that surround us. They were many in number and many in type. In this last section we try to organize and relate all of these stars to each other and to us. In doing this we will reach out into space and time as far as we possibly can. In Section A we consid ...
... In the last section we looked at the stars that surround us. They were many in number and many in type. In this last section we try to organize and relate all of these stars to each other and to us. In doing this we will reach out into space and time as far as we possibly can. In Section A we consid ...
When Stars Go Boom
... Students of almost all ages have some awareness of the nighttime stars, and many are aware of the fact that the Sun is one such star. Because we do not see obvious changes in stars on timescales of days or even years, most students don’t give much thought to the question of how long stars last, and ...
... Students of almost all ages have some awareness of the nighttime stars, and many are aware of the fact that the Sun is one such star. Because we do not see obvious changes in stars on timescales of days or even years, most students don’t give much thought to the question of how long stars last, and ...
JimH This is Your Life - The Atlanta Astronomy Club
... • You can actually see the knots, called Herbig-Haro objects, in the jet move with time •They can have wind velocities of 200-300 km/s. This phase lasts about 10 million years. ...
... • You can actually see the knots, called Herbig-Haro objects, in the jet move with time •They can have wind velocities of 200-300 km/s. This phase lasts about 10 million years. ...
Implies dark halo for self-enrichment
... Type II enrichment only: massive-star IMF invariant, and apparently well-sampled/mixed Stellar halo could form from any system(s) in which starformation is short-lived, and inefficient so that mean metallicity kept low ...
... Type II enrichment only: massive-star IMF invariant, and apparently well-sampled/mixed Stellar halo could form from any system(s) in which starformation is short-lived, and inefficient so that mean metallicity kept low ...
Cannibal star? - NRC Publications Archive
... Scholars. The opinion was that “Betelgeuse” came from a French distortion of the Arabic “bit al jawza”, meaning “Shoulder of the giant, Orion”. A more correct pronunciation is “Bayteljurze”, which for some reason is written as “Betelgeux”. The star lies some 500 light years away, and looks as bright ...
... Scholars. The opinion was that “Betelgeuse” came from a French distortion of the Arabic “bit al jawza”, meaning “Shoulder of the giant, Orion”. A more correct pronunciation is “Bayteljurze”, which for some reason is written as “Betelgeux”. The star lies some 500 light years away, and looks as bright ...
printer-friendly version of benchmark
... It is possible for a star less than 8 MSun to supernova, but its core mass must be greater than the Chandraskhkar Limit. This can only happen if a mid-mass star is in a binary system. In this case the mid-size star has ended fusion and reached the white dwarf stage. When its companion star reaches t ...
... It is possible for a star less than 8 MSun to supernova, but its core mass must be greater than the Chandraskhkar Limit. This can only happen if a mid-mass star is in a binary system. In this case the mid-size star has ended fusion and reached the white dwarf stage. When its companion star reaches t ...
Lecture10
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
... not too hot and not too cold, many hydrogen atoms have their electron in the n = 2 orbit: hence strong absorption ...
Slides R. Bower
... into the halo many times. • Wind loading suppresses the formation of dwarf galaxies. – Winds and recycling timescale determine galaxy formation efficiency, not star formation. ...
... into the halo many times. • Wind loading suppresses the formation of dwarf galaxies. – Winds and recycling timescale determine galaxy formation efficiency, not star formation. ...
The Formation of High Mass Stars
... Self consistent evolution of high mass turbulent cores from large scale turbulent clump Inclusion of MHD can launch hydromagnetic wind; possible photon bubble instab. UCRL-PRES-229278- 29 ...
... Self consistent evolution of high mass turbulent cores from large scale turbulent clump Inclusion of MHD can launch hydromagnetic wind; possible photon bubble instab. UCRL-PRES-229278- 29 ...
Cosmic Dawn A Hunting for the First Stars in the Universe
... What astronomers call the “pollution” of the universe was a two-step process, in which new chemicals were first created, and then distributed over wide volumes. It is widely known that stars behave like natural nuclear fusion reactors at their cores, and this is indeed how a star spends the majority ...
... What astronomers call the “pollution” of the universe was a two-step process, in which new chemicals were first created, and then distributed over wide volumes. It is widely known that stars behave like natural nuclear fusion reactors at their cores, and this is indeed how a star spends the majority ...
The life and times of stars
... Some basics on the nature of light White light is made up from light of many colours – a rainbow Light can be thought of a made of particles called photons, but also as waves! The different colours represent different energy levels of the photons – e.g. a blue photon is more energetic than a red ph ...
... Some basics on the nature of light White light is made up from light of many colours – a rainbow Light can be thought of a made of particles called photons, but also as waves! The different colours represent different energy levels of the photons – e.g. a blue photon is more energetic than a red ph ...
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.