dm curvas de rotacion
... • Here r and v are the star’s average radial distance from the center of the galaxy and its orbital velocity. G is the universal gravity constant and M is the mass of the galaxy within radius r. • NOTE: only mass lying within a star's orbit affects the star's motion. So we need to consider the mass ...
... • Here r and v are the star’s average radial distance from the center of the galaxy and its orbital velocity. G is the universal gravity constant and M is the mass of the galaxy within radius r. • NOTE: only mass lying within a star's orbit affects the star's motion. So we need to consider the mass ...
Astrophysics notes - School
... Radio astronomy is often favoured over traditional forms of astronomy since: Observations can be made during the day Objects can be viewed that are optically invisible Quasars can be observed The gathering power is huge (proportional to the diameter2) The process is not impeded by the dust ...
... Radio astronomy is often favoured over traditional forms of astronomy since: Observations can be made during the day Objects can be viewed that are optically invisible Quasars can be observed The gathering power is huge (proportional to the diameter2) The process is not impeded by the dust ...
Deep Space Mystery Note Form 2
... During this short interval, a supernova can radiate as much energy as our Sun could emit over its life span. The explosion expels much or all of the star’s material and causes a shock wave into the surrounding interstellar medium. The interstellar medium is the gas and dust that exists between the s ...
... During this short interval, a supernova can radiate as much energy as our Sun could emit over its life span. The explosion expels much or all of the star’s material and causes a shock wave into the surrounding interstellar medium. The interstellar medium is the gas and dust that exists between the s ...
Lecture 29 Our Galaxy: "Milky Way"
... Our Galaxy: "Milky Way" Milky, diffuse band of light around sky known to ancients. • Galileo shows to be combined light from large number of faint stars. Knowledge of structure is based on indirect distance methods for distant objects: • For stars close enough for heliocentric parallax (< 200 pc): D ...
... Our Galaxy: "Milky Way" Milky, diffuse band of light around sky known to ancients. • Galileo shows to be combined light from large number of faint stars. Knowledge of structure is based on indirect distance methods for distant objects: • For stars close enough for heliocentric parallax (< 200 pc): D ...
Chapter 29
... What color shift do we see when we look at most galaxies and why? We see a red shift, because the Universe is expanding. ...
... What color shift do we see when we look at most galaxies and why? We see a red shift, because the Universe is expanding. ...
DETAILED STELLAR POPULATION ANALYSIS OF GALAXY
... GEMINI/HST Galaxy Cluster Project (PIs I. Jorgensen & R. Davies. For the Gemini/HST Galaxy Cluster Project, a sample of 15 galaxy clusters with redshifts between 0.2 and 1 were chosen based on their X-ray luminosities. The sample is limited to clusters with X-ray luminosities larger than LX = 2 × 10 ...
... GEMINI/HST Galaxy Cluster Project (PIs I. Jorgensen & R. Davies. For the Gemini/HST Galaxy Cluster Project, a sample of 15 galaxy clusters with redshifts between 0.2 and 1 were chosen based on their X-ray luminosities. The sample is limited to clusters with X-ray luminosities larger than LX = 2 × 10 ...
ASTR-1020: Astronomy II Course Lecture Notes Section III
... 3. M stars have a large amount of molecular absorption features called molecular bands. TiO is very strong in the visible portion of the spectrum. a) C stars (a special class of cool stars) have a higher abundance of carbon (C/O > 1) with respect to the M stars (which have C/O < 1) =⇒ strong C2 and ...
... 3. M stars have a large amount of molecular absorption features called molecular bands. TiO is very strong in the visible portion of the spectrum. a) C stars (a special class of cool stars) have a higher abundance of carbon (C/O > 1) with respect to the M stars (which have C/O < 1) =⇒ strong C2 and ...
Chapter 09 - The Independent School
... Science is based on measurement, but measurement in astronomy is very difficult. To discover the properties of stars, astronomers must use their telescopes and spectrographs in ingenious ways to learn the secrets hidden in starlight. The result is a family portrait of the stars. Here you will find a ...
... Science is based on measurement, but measurement in astronomy is very difficult. To discover the properties of stars, astronomers must use their telescopes and spectrographs in ingenious ways to learn the secrets hidden in starlight. The result is a family portrait of the stars. Here you will find a ...
Galaxy Clusters
... Galaxies are the basic visible building blocks of the Universe. They are rarely found in isolation, but rather in sparse groups – sort of galactic urban sprawl. But occasional dense concentrations are found. The galaxies in these “Compact Groups” show dramatic differences in the way they evolve and ...
... Galaxies are the basic visible building blocks of the Universe. They are rarely found in isolation, but rather in sparse groups – sort of galactic urban sprawl. But occasional dense concentrations are found. The galaxies in these “Compact Groups” show dramatic differences in the way they evolve and ...
Lesson 4, Stars
... Stars up to ten times the mass of the Sun become red giants. Nuclear reactions give off energy causing the star to release huge clouds of gas. A layer of gases, called a planetary nebula, forms around the star. Its surface becomes white-hot, forming a white ...
... Stars up to ten times the mass of the Sun become red giants. Nuclear reactions give off energy causing the star to release huge clouds of gas. A layer of gases, called a planetary nebula, forms around the star. Its surface becomes white-hot, forming a white ...
Summary of Astronomy
... ours, though a bit bigger. The star, Upsilon Andromedea, is 44 light years away, which means a spacecraft moving at the speed of light would take 44 years to get there. Still, it's not too far away by astronomical standards (the diameter of the Milky Way is about 100,000 light years). ...
... ours, though a bit bigger. The star, Upsilon Andromedea, is 44 light years away, which means a spacecraft moving at the speed of light would take 44 years to get there. Still, it's not too far away by astronomical standards (the diameter of the Milky Way is about 100,000 light years). ...
Wavelength
... • All galaxies beyond the Local Group (our group of galaxies) show a red shift in their spectrum, this shows they are moving away from us. • The universe is EXPANDING!!!! ...
... • All galaxies beyond the Local Group (our group of galaxies) show a red shift in their spectrum, this shows they are moving away from us. • The universe is EXPANDING!!!! ...
A fascinating tour of the cosmos — from Earth orbit.
... Jupiter; storms on Saturn, Uranus, and Neptune; and the faraway worlds of Pluto and Quaoar. Beyond the solar system, we explore protoplanetary disks in the Orion Nebula, and regions of starbirth across the cosmos. We witness the deaths of stars like our Sun; the cataclysmic aftermath of supernovae i ...
... Jupiter; storms on Saturn, Uranus, and Neptune; and the faraway worlds of Pluto and Quaoar. Beyond the solar system, we explore protoplanetary disks in the Orion Nebula, and regions of starbirth across the cosmos. We witness the deaths of stars like our Sun; the cataclysmic aftermath of supernovae i ...
Unit 4: Astronomy
... of these in addition to an optical telescope. Assignment #2: Pages 568, 587-588 Topics: Distances to and motion of stars Objectives: 1) Describe how astronomers were first able to measure the distances to stars. 2) Describe the unit of the length developed by astronomers to measure and describe dist ...
... of these in addition to an optical telescope. Assignment #2: Pages 568, 587-588 Topics: Distances to and motion of stars Objectives: 1) Describe how astronomers were first able to measure the distances to stars. 2) Describe the unit of the length developed by astronomers to measure and describe dist ...
PH607 – Galaxies 1
... Curtis believed that the spiral nebulae are galaxies like our own lying at distances ranging from 150 kpc (M31) to 3000 kpc for the most distant systems. Shapley believed the spirals were part of our Galaxy. ...
... Curtis believed that the spiral nebulae are galaxies like our own lying at distances ranging from 150 kpc (M31) to 3000 kpc for the most distant systems. Shapley believed the spirals were part of our Galaxy. ...
LESSON 4, STARS
... Stars up to ten times the mass of the Sun become red giants. Nuclear reactions give off energy causing the star to release huge clouds of gas. A layer of gases, called a planetary nebula, forms around the star. Its surface becomes white-hot, forming a ...
... Stars up to ten times the mass of the Sun become red giants. Nuclear reactions give off energy causing the star to release huge clouds of gas. A layer of gases, called a planetary nebula, forms around the star. Its surface becomes white-hot, forming a ...
B – V
... Bandwidth : wavelength range over which observations are made: Broadband: Dl/l ~ 1/4 Narrow band: Dl/l ~ 10–2 Color index: difference of two magnitudes at two different wavelengths Standard star: star that provide a reference to a magnitude system ...
... Bandwidth : wavelength range over which observations are made: Broadband: Dl/l ~ 1/4 Narrow band: Dl/l ~ 10–2 Color index: difference of two magnitudes at two different wavelengths Standard star: star that provide a reference to a magnitude system ...
Astronomy 1
... The Milky Way Galaxy, commonly referred to as just the Milky Way, or sometimes simply as the Galaxy,[a] is the home galaxy of the Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billio ...
... The Milky Way Galaxy, commonly referred to as just the Milky Way, or sometimes simply as the Galaxy,[a] is the home galaxy of the Solar System, and of Earth. It is agreed that the Milky Way is a spiral galaxy, with observations suggesting that it is a barred spiral galaxy. It contains 100-400 billio ...
February 16
... Discussion But, what if there is a lot of dust between us and the object we are observing. That would make the object appear fainter and we would be misled into thinking the object was much farther away than it really is. How can astronomers determine if dust is making things fainter? ...
... Discussion But, what if there is a lot of dust between us and the object we are observing. That would make the object appear fainter and we would be misled into thinking the object was much farther away than it really is. How can astronomers determine if dust is making things fainter? ...
Deducing Temperatures and Luminosities of Stars
... M 2.5 log10 m 10 pc distance 5 log10 m ...
... M 2.5 log10 m 10 pc distance 5 log10 m ...
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera
... association and, based on spectroscopic calibrations and UBV photometry, derived the distance of 1590 pc, which is the currently accepted distance to this association. Most of the stars previously assigned to Mon OB2 were included in our sample. Based on the precise photometric distances for the ind ...
... association and, based on spectroscopic calibrations and UBV photometry, derived the distance of 1590 pc, which is the currently accepted distance to this association. Most of the stars previously assigned to Mon OB2 were included in our sample. Based on the precise photometric distances for the ind ...
PH607lec10
... Curtis believed that the spiral nebulae are galaxies like our own lying at distances ranging from 150 kpc (M31) to 3000 kpc for the most distant systems. Shapley believed the spirals were part of our Galaxy. ...
... Curtis believed that the spiral nebulae are galaxies like our own lying at distances ranging from 150 kpc (M31) to 3000 kpc for the most distant systems. Shapley believed the spirals were part of our Galaxy. ...
What YOU can do! - Bangalore Astronomical Society
... Dark Matter and Dark Energy Cosmic Microwave Background Radiation ...
... Dark Matter and Dark Energy Cosmic Microwave Background Radiation ...
Stars part 1
... 1. Distance - using Cepheid variable stars, et al. Cepheid variable stars brighten and dim at regular intervals, due to a regular swelling and shrinking of the star. The brighter the star, the longer the period of brightening and dimming. ...
... 1. Distance - using Cepheid variable stars, et al. Cepheid variable stars brighten and dim at regular intervals, due to a regular swelling and shrinking of the star. The brighter the star, the longer the period of brightening and dimming. ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.