Lecture01-ASTA01 - University of Toronto
... • And that’s only in the observable Universe! • 10% or more of those stars probably have families of planets like our solar system, and on some of those thousand billions of billions of planets liquid-water oceans and protective atmospheres may have sheltered the spark of life. We don’t know on how ...
... • And that’s only in the observable Universe! • 10% or more of those stars probably have families of planets like our solar system, and on some of those thousand billions of billions of planets liquid-water oceans and protective atmospheres may have sheltered the spark of life. We don’t know on how ...
Vasiliki Pavlidou - Center for Particle and Gravitational Astrophysics
... known at high confidence A success story Low-energy multi-wavelength campaign from neutrino Neutrino detectors pick up the -spike astrophysics Auger picks up the UHE particle signature (time broadening small and understood!) ...
... known at high confidence A success story Low-energy multi-wavelength campaign from neutrino Neutrino detectors pick up the -spike astrophysics Auger picks up the UHE particle signature (time broadening small and understood!) ...
Formation of z~6 Quasars from Hierarchical Galaxy Mergers
... ¥ Largest halo reaches M ~ 5.4x1012 h-1 Gpc3 through 7 major mergers between Z ~14.4 and Z~6.5 ¥ Quasar host galaxy build rapidly through gas rich mergers. ¥ SFR up to 104 Msun /year ¥ Reaching stellar mass of 1012Msun at Z~6.5 ¥ BH accretion reaches 20 Msun/year and M = 2*109 Msun ¥ At peak, this i ...
... ¥ Largest halo reaches M ~ 5.4x1012 h-1 Gpc3 through 7 major mergers between Z ~14.4 and Z~6.5 ¥ Quasar host galaxy build rapidly through gas rich mergers. ¥ SFR up to 104 Msun /year ¥ Reaching stellar mass of 1012Msun at Z~6.5 ¥ BH accretion reaches 20 Msun/year and M = 2*109 Msun ¥ At peak, this i ...
ANTARES - National Optical Astronomy Observatory
... especially when it comes to transient objects that are only available for a short period. In addition, many resources are scheduled in ways not necessarily favorable to time-domain astronomy. The so-called classical method of scheduling telescopes assigns nights to astronomers and they need to have ...
... especially when it comes to transient objects that are only available for a short period. In addition, many resources are scheduled in ways not necessarily favorable to time-domain astronomy. The so-called classical method of scheduling telescopes assigns nights to astronomers and they need to have ...
Test #4
... a) Object’s mass and velocity, b) Object’s age and distance from the galactic center c) Object’s mass and age, d) Object’s velocity and distance from the galactic center 3. What observation of the Galaxy suggests it is much larger than the halo and contains a large amount of matter not in the form o ...
... a) Object’s mass and velocity, b) Object’s age and distance from the galactic center c) Object’s mass and age, d) Object’s velocity and distance from the galactic center 3. What observation of the Galaxy suggests it is much larger than the halo and contains a large amount of matter not in the form o ...
Chapter 3 Cosmology 3.1 The Doppler effect
... that the expansion of the Universe is accelerating and has been for about the past 5000 million years. Before this discovery, most astronomers expected that the Universe was decelerating because very distant objects would be slowed down by the force of gravity from other galaxies. Many more observat ...
... that the expansion of the Universe is accelerating and has been for about the past 5000 million years. Before this discovery, most astronomers expected that the Universe was decelerating because very distant objects would be slowed down by the force of gravity from other galaxies. Many more observat ...
Astro Physics Notes and Study Guide 2015-17
... The original energy radiated by the Big Bang was obviously very low wavelength (high energy = high frequency) photons. As the Universe has expanded it has caused these wavelengths to increase (cool down). This radiation has now cooled down to the microwave region of the electromagnetic spectrum . ...
... The original energy radiated by the Big Bang was obviously very low wavelength (high energy = high frequency) photons. As the Universe has expanded it has caused these wavelengths to increase (cool down). This radiation has now cooled down to the microwave region of the electromagnetic spectrum . ...
James`s 5-Page Final Exam Review
... 23) Scientific Method. Pick an astronomical example and describe the process by which it went through the scientific method shown below. Describe what happened at each step for your particular example. (Some examples are: Geocentric/Heliocentric Model; What is Dark Matter?; “The Great Debate”, etc.) ...
... 23) Scientific Method. Pick an astronomical example and describe the process by which it went through the scientific method shown below. Describe what happened at each step for your particular example. (Some examples are: Geocentric/Heliocentric Model; What is Dark Matter?; “The Great Debate”, etc.) ...
Response to Gary Hoge on Whether the Earth can be the Center of
... there in space massive enough to counteract that pull, but there's simply nothing in the whole universe that can exert enough force to rival the gravitational pull from the sun. R. Sungenis: if so, then why does Mr. Hoge believe that the sun orbits the center of the Milky Way galaxy? Evidently, the ...
... there in space massive enough to counteract that pull, but there's simply nothing in the whole universe that can exert enough force to rival the gravitational pull from the sun. R. Sungenis: if so, then why does Mr. Hoge believe that the sun orbits the center of the Milky Way galaxy? Evidently, the ...
File
... A long time ago scientists thought that the Universe never changed. Now there is evidence to show that stars progress through various stages and that the Universe is expanding. (a) Our Sun is in its main sequence stage. (i) Complete the sentence by putting a cross ( ) in the box next to your answer. ...
... A long time ago scientists thought that the Universe never changed. Now there is evidence to show that stars progress through various stages and that the Universe is expanding. (a) Our Sun is in its main sequence stage. (i) Complete the sentence by putting a cross ( ) in the box next to your answer. ...
Galaxies – Island universes
... now been measured accurately. It’s H = 70 km/sec for every additional megaparsec further out you look • Now we have our final rung in the Distance Ladder: Solve for D and get D=V/H ...
... now been measured accurately. It’s H = 70 km/sec for every additional megaparsec further out you look • Now we have our final rung in the Distance Ladder: Solve for D and get D=V/H ...
Spectroscopic confirmation of a galaxy at redshift z=8.6
... Figure 1 | Two representations of the spectrum of UDFy-38135539 showing its significance. a, The spectrum shows a faint emission line detected at 6s significance at a wavelength of 11,615.6 Å, corresponding to a redshift of z 5 8.5549 6 0.0020 for Lya. The integrated spectrum was extracted from a s ...
... Figure 1 | Two representations of the spectrum of UDFy-38135539 showing its significance. a, The spectrum shows a faint emission line detected at 6s significance at a wavelength of 11,615.6 Å, corresponding to a redshift of z 5 8.5549 6 0.0020 for Lya. The integrated spectrum was extracted from a s ...
The Great Debate - The Story Behind The Science
... scientific circles does not. Finally, acceptance or rejection of scientific ideas is determined over time by the scientific community. Looking back, both Shapley and Curtis had well-founded arguments. The Milky Way was indeed much larger than anybody had ever imagined, and galaxies did indeed exist ...
... scientific circles does not. Finally, acceptance or rejection of scientific ideas is determined over time by the scientific community. Looking back, both Shapley and Curtis had well-founded arguments. The Milky Way was indeed much larger than anybody had ever imagined, and galaxies did indeed exist ...
The Next 2-3 Weeks
... Important to read through Chapter 17 (Relativity) before I start lecturing on it. Pay particular attention to 17.2 “Intervals & Geodesics” • What is a metric? • The Schwarzschild metric (= non-rotating black hole) • “The orbit of a satellite” (somewhat flakey example) I will present additional mater ...
... Important to read through Chapter 17 (Relativity) before I start lecturing on it. Pay particular attention to 17.2 “Intervals & Geodesics” • What is a metric? • The Schwarzschild metric (= non-rotating black hole) • “The orbit of a satellite” (somewhat flakey example) I will present additional mater ...
young science communicator`s competition
... novae in the spiral nebulae than amongst the stars in our galaxies if the nebulae are not themselves galaxies? [One can hear the smirk in his voice] NARRATOR: [Old voice again] Of course, we know now that those bright lights we then called novae were in fact supernovae, explosions of massive stars. ...
... novae in the spiral nebulae than amongst the stars in our galaxies if the nebulae are not themselves galaxies? [One can hear the smirk in his voice] NARRATOR: [Old voice again] Of course, we know now that those bright lights we then called novae were in fact supernovae, explosions of massive stars. ...
Action-at-a-Distance and Local Action in Gravitation
... velocity of the source; gravity may also have its own characteristic transmission velocity vg . Identification of a particular theory with the AAAD mode or the MFLA mode appears to be a delicate question. More essence to AAAD will be given in 5.ii. In RLA, action is mediated through a metric field, ...
... velocity of the source; gravity may also have its own characteristic transmission velocity vg . Identification of a particular theory with the AAAD mode or the MFLA mode appears to be a delicate question. More essence to AAAD will be given in 5.ii. In RLA, action is mediated through a metric field, ...
Introduction to Dark Matter
... photons, and the Universe became transparent to radiation. The Black body radiation originating from this cosmic plasma is still permeating the Universe in the form of the Cosmic Microwave Background Radiation (CMBR; often referred to as the “afterglow” of Big Bang) which can be observed at T ≈ 2.73 ...
... photons, and the Universe became transparent to radiation. The Black body radiation originating from this cosmic plasma is still permeating the Universe in the form of the Cosmic Microwave Background Radiation (CMBR; often referred to as the “afterglow” of Big Bang) which can be observed at T ≈ 2.73 ...
The View from No-when - UC San Diego Department of Philosophy
... thermodynamics, contemporary cosmology, radiation, causation, and quantum mechanics (QM). In each case he sifts the asymmetries that are human in origin from those existing independently of us. A recurring theme is that many of us, even our best scientists, have failed to come fully to grips with th ...
... thermodynamics, contemporary cosmology, radiation, causation, and quantum mechanics (QM). In each case he sifts the asymmetries that are human in origin from those existing independently of us. A recurring theme is that many of us, even our best scientists, have failed to come fully to grips with th ...
Astronomy, Astrophysics, and Cosmology
... Apparent position in sky of more distant stars changes so slowly that proper motion can’t be detected with even most patient observation However + rate of approach or recession of star in line of sight can be measured much more accurately than its ⊥ motion to line of sight Technique uses familiar pr ...
... Apparent position in sky of more distant stars changes so slowly that proper motion can’t be detected with even most patient observation However + rate of approach or recession of star in line of sight can be measured much more accurately than its ⊥ motion to line of sight Technique uses familiar pr ...
Gravitational waves - LIGO
... central glow formed by nearby galaxy. Such gravitational lensing images are used to detect a ‘dark matter’ body as the central object ...
... central glow formed by nearby galaxy. Such gravitational lensing images are used to detect a ‘dark matter’ body as the central object ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.