Astronomy 102, Spring 2003 Solutions to Review Problems
... star is older? Which star started its life with more mass? Given that we’ve talked about how far apart stars are in the galaxy, they almost never run into each other. (It’s a different matter in the cores of globular clusters, and even right at the center of our galaxy, but consider the Solar neighb ...
... star is older? Which star started its life with more mass? Given that we’ve talked about how far apart stars are in the galaxy, they almost never run into each other. (It’s a different matter in the cores of globular clusters, and even right at the center of our galaxy, but consider the Solar neighb ...
Zinc and chromium abundances in a third
... DLAs at these redshifts arise in a diverse population of galaxies, which includes amorphous low-surface brightness objects and compact galaxies, as well as apparently normal spirals of various sizes and luminosities. The same presumably applies at > 1.5 where values of [Zn/H] z∼ DLA span more than o ...
... DLAs at these redshifts arise in a diverse population of galaxies, which includes amorphous low-surface brightness objects and compact galaxies, as well as apparently normal spirals of various sizes and luminosities. The same presumably applies at > 1.5 where values of [Zn/H] z∼ DLA span more than o ...
Do high-velocity clouds trace the dark matter subhalo population?⋆
... Context. Within the cosmological concordance model, cold dark matter (CDM) subhalos form the building blocks that merge hierarchically into more massive galaxies. This concept requires that massive galaxies are even nowadays surrounded by numerous subhalos. Since intergalactic gas is accreted by mas ...
... Context. Within the cosmological concordance model, cold dark matter (CDM) subhalos form the building blocks that merge hierarchically into more massive galaxies. This concept requires that massive galaxies are even nowadays surrounded by numerous subhalos. Since intergalactic gas is accreted by mas ...
Lecture 17 Review
... Where do stars come from? Are they still being formed? The evidence for current star formation is the presence of much gas and dust in space. This is called the interstellar medium and where the densities are large the gas and dust formed clouds called nebula. Emission nebula - 100 to 104 solar mass ...
... Where do stars come from? Are they still being formed? The evidence for current star formation is the presence of much gas and dust in space. This is called the interstellar medium and where the densities are large the gas and dust formed clouds called nebula. Emission nebula - 100 to 104 solar mass ...
© Taganov I
... planets and all the stars. When the stars die they compress and spin, and spin-radiation evaporates the ambient planets to form planetary nebulae and a systematic dimming error. Widely accepted CDMHC models of gravitational structure formation must therefore be abandoned along with all collisionles ...
... planets and all the stars. When the stars die they compress and spin, and spin-radiation evaporates the ambient planets to form planetary nebulae and a systematic dimming error. Widely accepted CDMHC models of gravitational structure formation must therefore be abandoned along with all collisionles ...
The Hidden Lives of Galaxies NSTA 2001
... direction, having made its closest approach 40 million years ago. However, IC 2163 does not have sufficient energy to escape from the gravitational pull of NGC 2207, and is destined to be pulled back and swing past the larger galaxy again in the future. They are destined to merge in the next few bil ...
... direction, having made its closest approach 40 million years ago. However, IC 2163 does not have sufficient energy to escape from the gravitational pull of NGC 2207, and is destined to be pulled back and swing past the larger galaxy again in the future. They are destined to merge in the next few bil ...
Solutions - UC Berkeley Astronomy w
... a car look further away than you would guess from instinct. In the same way, stars in the plane of the Milky Way can look farther than they really are because of gas and dust. Chapter 16 (5) page 394, question 1 The Shapley-Curtis debate centered around the question of whether spiral nebulae are clo ...
... a car look further away than you would guess from instinct. In the same way, stars in the plane of the Milky Way can look farther than they really are because of gas and dust. Chapter 16 (5) page 394, question 1 The Shapley-Curtis debate centered around the question of whether spiral nebulae are clo ...
Stellar Masses
... • The prelude to Hubble’s Law was the establishment of measurements of galactic distances and also measurements of their Doppler shifts. • Vesto Slipher [Lowell Observatory] measured the redshifts of many galaxies[nebulae] in the early decades of the 20thC. They were expected to be random but he fou ...
... • The prelude to Hubble’s Law was the establishment of measurements of galactic distances and also measurements of their Doppler shifts. • Vesto Slipher [Lowell Observatory] measured the redshifts of many galaxies[nebulae] in the early decades of the 20thC. They were expected to be random but he fou ...
Final review - Physics and Astronomy
... -Tend to be young (10's to 100's of millions of years, not billions, but there are exceptions) ...
... -Tend to be young (10's to 100's of millions of years, not billions, but there are exceptions) ...
High molecular gas fractions in normal massive star
... Stars form from cold molecular interstellar gas. As this is relatively rare in the local Universe, galaxies like the Milky Way form only a few new stars per year. Typical massive galaxies in the distant Universe formed stars an order of magnitude more rapidly1,2. Unless star formation was significan ...
... Stars form from cold molecular interstellar gas. As this is relatively rare in the local Universe, galaxies like the Milky Way form only a few new stars per year. Typical massive galaxies in the distant Universe formed stars an order of magnitude more rapidly1,2. Unless star formation was significan ...
Measuring the Masses of Galaxies in the Sloan Digital Sky Survey
... with respect to the size of the Universe when light left the galaxy (or quasar). (1 + z) = (size now) / (size then) ...
... with respect to the size of the Universe when light left the galaxy (or quasar). (1 + z) = (size now) / (size then) ...
Goal: To understand how stars form.
... • Protostars go through stages. • The first is stage 0. • Lasts the first 10,000 years of formation • You still have very cold gas in the system. • However Astronomers had long wondered what kept it from collapsing too fast. ...
... • Protostars go through stages. • The first is stage 0. • Lasts the first 10,000 years of formation • You still have very cold gas in the system. • However Astronomers had long wondered what kept it from collapsing too fast. ...
here
... • Associated with the Diffuse ISM, correlate with extinction • Bands show evidence of molecular band shapes - large organic molecules? ...
... • Associated with the Diffuse ISM, correlate with extinction • Bands show evidence of molecular band shapes - large organic molecules? ...
Scale and Structure of the Universe
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
Formation of the Most Distant & Luminous Quasars
... – Both BHs and host galaxies build up through hierarchical mergers. – BHs accrete gas under Eddington limit in a selfregulated manner owing to feedback. • Our model should provide a viable mechanism for other luminous quasars, no exotic process is needed. ...
... – Both BHs and host galaxies build up through hierarchical mergers. – BHs accrete gas under Eddington limit in a selfregulated manner owing to feedback. • Our model should provide a viable mechanism for other luminous quasars, no exotic process is needed. ...
May 2010 - Pomona Valley Amateur Astronomers
... have very small values for Z. For Andromeda it is only slightly more complicated. The galaxy is moving toward us, so the center shift is blue. For any star within that galaxy the shift is more or less depending on whether the star is moving toward or away from us. To get the time (age) from the reds ...
... have very small values for Z. For Andromeda it is only slightly more complicated. The galaxy is moving toward us, so the center shift is blue. For any star within that galaxy the shift is more or less depending on whether the star is moving toward or away from us. To get the time (age) from the reds ...
Multiple choice test questions 2, Winter Semester
... 16) What is a standard candle? A) an object for which we are likely to know its true luminosity B) an object for which we can easily measure its apparent brightness C) a class of objects that we know all have exactly the same luminosity D) any star for which we know its exact apparent brightness E) ...
... 16) What is a standard candle? A) an object for which we are likely to know its true luminosity B) an object for which we can easily measure its apparent brightness C) a class of objects that we know all have exactly the same luminosity D) any star for which we know its exact apparent brightness E) ...
The correct answers are written in bold, italic and underlined. The
... • Long wavelength radio waves • Ultraviolet and X radiation The peak emission for dense, warm objects will be at infrared wavelengths, and this radiation can penetrate the dust and gas clouds. 11. What will be the influence of rotational motion on a dense molecular cloud of dust and gas as it conden ...
... • Long wavelength radio waves • Ultraviolet and X radiation The peak emission for dense, warm objects will be at infrared wavelengths, and this radiation can penetrate the dust and gas clouds. 11. What will be the influence of rotational motion on a dense molecular cloud of dust and gas as it conden ...
Universe ppt - Killeen ISD
... An artist's rendering shows a neutron star—located 50,000 light-years from Earth—that flared up so brightly in December 2004 that it temporarily blinded all the x-ray satellites in space and lit up the Earth's upper atmosphere. The flare-up occurred when the star's massive, twisting magnetic field r ...
... An artist's rendering shows a neutron star—located 50,000 light-years from Earth—that flared up so brightly in December 2004 that it temporarily blinded all the x-ray satellites in space and lit up the Earth's upper atmosphere. The flare-up occurred when the star's massive, twisting magnetic field r ...
poster_IAU244 - ANU - Australian National University
... The figure to the left shows the average HI galaxy spectrum created from coadding the signal of 278 redshifts. The top spectrum has no smoothing or binning. The bottom spectrum has been binned to ~500 kms-1. For both spectra the 1σ error is shown as dashed lines. The measured average HI mass is (7.4 ...
... The figure to the left shows the average HI galaxy spectrum created from coadding the signal of 278 redshifts. The top spectrum has no smoothing or binning. The bottom spectrum has been binned to ~500 kms-1. For both spectra the 1σ error is shown as dashed lines. The measured average HI mass is (7.4 ...
Brock physics - Brock University
... (c) the radius of the region around a neutron star within which X-ray bursts occur. (d) * the radius of the region around a black hole within which not even light can escape. 35. Neutron stars with masses greater than about 3 solar masses do not exist because neutron degeneracy pressure is not stron ...
... (c) the radius of the region around a neutron star within which X-ray bursts occur. (d) * the radius of the region around a black hole within which not even light can escape. 35. Neutron stars with masses greater than about 3 solar masses do not exist because neutron degeneracy pressure is not stron ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... All questions are worth 1 pt., unless otherwise noted. Select the best answer for each question. Please answer discussion/description questions in complete sentences. Your may use your own handwritten notes, homework assignments and quizzes as references d ...
... All questions are worth 1 pt., unless otherwise noted. Select the best answer for each question. Please answer discussion/description questions in complete sentences. Your may use your own handwritten notes, homework assignments and quizzes as references d ...
Stellar Populations Science
... •Role of GSMT – Deeper crowding limit allows us to image stars in wide range of evolutionary stages in both bulges and disks, giving, for the first time, an accurate account of their star formation and chemical enrichment histories – Allows us to measure star formation histories of disks out to ~10 ...
... •Role of GSMT – Deeper crowding limit allows us to image stars in wide range of evolutionary stages in both bulges and disks, giving, for the first time, an accurate account of their star formation and chemical enrichment histories – Allows us to measure star formation histories of disks out to ~10 ...