ONLINE practice exam
... 2. A supernova goes off in a galaxy whose cosmological redshift is z =0.2. From its maximum brightness, astronomers determine that it is located at a distance of 1000 Mpc. (a) What is the observed wavelength of the HI spectral line from this galaxy? (The rest wavelength is 21.1cm) (b) Use this info ...
... 2. A supernova goes off in a galaxy whose cosmological redshift is z =0.2. From its maximum brightness, astronomers determine that it is located at a distance of 1000 Mpc. (a) What is the observed wavelength of the HI spectral line from this galaxy? (The rest wavelength is 21.1cm) (b) Use this info ...
Slides
... GIANT MOLECULAR CLOUDS (GMCs) Large, Dense, & Cold regions of ISM GMCs are the LARGEST structures in Galaxy 0.1-10 million solar masses ...
... GIANT MOLECULAR CLOUDS (GMCs) Large, Dense, & Cold regions of ISM GMCs are the LARGEST structures in Galaxy 0.1-10 million solar masses ...
Which of the following is not a characteristic of the stars of the disk
... Please indicate the best answer to the following questions on the answer sheet provided. 1. Which of the following is not a characteristic of the stars of the disk component of our galaxy? a. circular orbits, b. randomly inclined orbits, c. higher metal abundance d. young stars, 2. The mass of a sin ...
... Please indicate the best answer to the following questions on the answer sheet provided. 1. Which of the following is not a characteristic of the stars of the disk component of our galaxy? a. circular orbits, b. randomly inclined orbits, c. higher metal abundance d. young stars, 2. The mass of a sin ...
Photometric Mass-to-Light Ratio In addition to a population`s total
... Plugging these numbers into (16.12), and picking a typical velocity for a galaxy moving through a cluster (v ∼ 1300 km s−1 ), yields a requisite x-ray gas density of 5 × 10−4 atoms cm−2 . The above shows that it does not take much of an intercluster medium to cause spirals to be stripped of their ga ...
... Plugging these numbers into (16.12), and picking a typical velocity for a galaxy moving through a cluster (v ∼ 1300 km s−1 ), yields a requisite x-ray gas density of 5 × 10−4 atoms cm−2 . The above shows that it does not take much of an intercluster medium to cause spirals to be stripped of their ga ...
molecular observations of H CO , 13CO, HCN how to determine
... if τ ~10 , CO critical density ~ 300 cm-3 i.e. CO thermalized even in low density clouds called line photon trapping also much easier to excite high dipole mom. mol. can show analytically : Tx varies as (α nm nH2 Cul )1/2 è Tx depends only on mol. abundance ! (not A-coef.) Note ...
... if τ ~10 , CO critical density ~ 300 cm-3 i.e. CO thermalized even in low density clouds called line photon trapping also much easier to excite high dipole mom. mol. can show analytically : Tx varies as (α nm nH2 Cul )1/2 è Tx depends only on mol. abundance ! (not A-coef.) Note ...
Stars and Galaxies
... over time. The mass of a star controls its Evolution Lifespan Ultimate fate (how it dies) ...
... over time. The mass of a star controls its Evolution Lifespan Ultimate fate (how it dies) ...
8-3-Star_Classification STUDENT
... out of the building your entire life, would you be able to know what the school looked like from a distance? Of course not. All you could do is look out the windows and get some view of part of the building. If you looked out enough windows you might get a general idea but you could never know for s ...
... out of the building your entire life, would you be able to know what the school looked like from a distance? Of course not. All you could do is look out the windows and get some view of part of the building. If you looked out enough windows you might get a general idea but you could never know for s ...
Quantum Well Electron Gain Structures and Infrared
... • More: we see major LBV line variability (factors of ~5-6 variation in EW in 1 year) implies that one star is dominant source of ionizing radiation • Thus, even if it is a binary, probable q>1 and mass limit >> 75 M0 • (And … something BIGGER made a neutron star ...
... • More: we see major LBV line variability (factors of ~5-6 variation in EW in 1 year) implies that one star is dominant source of ionizing radiation • Thus, even if it is a binary, probable q>1 and mass limit >> 75 M0 • (And … something BIGGER made a neutron star ...
Carbon monoxide in clouds at low metallicity in the dwarf irregular
... Carbon monoxide (CO) is the primary tracer for interstellar clouds where stars form, but it has never been detected in galaxies in which the oxygen abundance relative to hydrogen is less than 20 per cent of that of the Sun, even though such ‘low-metallicity’ galaxies often form stars. This raises th ...
... Carbon monoxide (CO) is the primary tracer for interstellar clouds where stars form, but it has never been detected in galaxies in which the oxygen abundance relative to hydrogen is less than 20 per cent of that of the Sun, even though such ‘low-metallicity’ galaxies often form stars. This raises th ...
Star Formation - University of Redlands
... • Stars and other interstellar material are in a perpetual battle between forces pulling in (gravity) and forces pushing out (pressure). • Gravity comes from the mass of the cloud or star. • Pressure comes from the motion of the atoms or molecules. – Think of hot air balloons. – The hotter the air, ...
... • Stars and other interstellar material are in a perpetual battle between forces pulling in (gravity) and forces pushing out (pressure). • Gravity comes from the mass of the cloud or star. • Pressure comes from the motion of the atoms or molecules. – Think of hot air balloons. – The hotter the air, ...
Lecture Eleven (Powerpoint format)
... Kip went to work on the problem and actually worked out the details using relativity theory. He suggested that wormholes might work. Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on s ...
... Kip went to work on the problem and actually worked out the details using relativity theory. He suggested that wormholes might work. Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on s ...
Document
... • What is the Milky Way? – Thomas Wright (1750) suggested that solar system was embedded in enormous shell of stars… – Emmanuel Kant (1755) realized that the MW is a giant disk of stars – Kant also hypothesized that space was full of other, similar disks of stars. ...
... • What is the Milky Way? – Thomas Wright (1750) suggested that solar system was embedded in enormous shell of stars… – Emmanuel Kant (1755) realized that the MW is a giant disk of stars – Kant also hypothesized that space was full of other, similar disks of stars. ...
Stellar Pops 2
... galaxies throughout the Hubble sequence. – Did star formation comence at the same time thoughout the volume of space to the Virgo Cluster? – What are the star-formation histories for gE galaxies? – Is there a Universal `floor’ to the MDF? ...
... galaxies throughout the Hubble sequence. – Did star formation comence at the same time thoughout the volume of space to the Virgo Cluster? – What are the star-formation histories for gE galaxies? – Is there a Universal `floor’ to the MDF? ...
How Far is far ?
... around an intervening galaxy by the curvature of space, and follow 2 distinct paths to the Earth. By tracking both paths exactly, an estimate can be made of the distance of the “lensing” galaxy. ...
... around an intervening galaxy by the curvature of space, and follow 2 distinct paths to the Earth. By tracking both paths exactly, an estimate can be made of the distance of the “lensing” galaxy. ...
IL CIELO COME LABORATORIO – 2010/2011 STAR FORMATION
... density of the proto-galaxy is low, they cool down slowly, the gases condense in the centre forming the bulge’s stars and then distribute themselves on a plane due to the galaxy rotation, continually creating new stars; while in elliptical galaxies stars form roughly at the same time. II. OBSERVATIO ...
... density of the proto-galaxy is low, they cool down slowly, the gases condense in the centre forming the bulge’s stars and then distribute themselves on a plane due to the galaxy rotation, continually creating new stars; while in elliptical galaxies stars form roughly at the same time. II. OBSERVATIO ...
YOUR GALACTIC ADDRESS - Pine Mountain Middle School
... Galactic Address Map 7: Your Galactic Cluster The Milky Way galaxy is part of a cluster of galaxies called the Local Group ...
... Galactic Address Map 7: Your Galactic Cluster The Milky Way galaxy is part of a cluster of galaxies called the Local Group ...
Star Groups and Big Bang Power Point
... The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. These three galaxies are called the Local Group. ...
... The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. These three galaxies are called the Local Group. ...
Lecture 4 – Protoplanetary disk structure o Protoplanetary disk
... dense cores. One core further collapses, becoming hot enough to start emitting in far IR. ...
... dense cores. One core further collapses, becoming hot enough to start emitting in far IR. ...
the young astronomers newsletter
... asteroid whose orbit crosses the Earth's every three years. Experts say the giant object (2014 UR1160) poses no immediate threat of collision “but over a much longer period a collision looks quite likely”. The unexpected discovery underscores how little is still known about asteroids and their unpre ...
... asteroid whose orbit crosses the Earth's every three years. Experts say the giant object (2014 UR1160) poses no immediate threat of collision “but over a much longer period a collision looks quite likely”. The unexpected discovery underscores how little is still known about asteroids and their unpre ...
NAME:______ANSWER KEY_______________________Period
... Unit 10-11 Review Sheet ANSWER KEY 1. What is the universe made up of? matter, energy, and space 2. What does light year measure? distance 3. Why do we use light year instead of kilometers? Kilometers would be way to big of a number 4. Change the following number 78,000,000 to scientific notation. 7 ...
... Unit 10-11 Review Sheet ANSWER KEY 1. What is the universe made up of? matter, energy, and space 2. What does light year measure? distance 3. Why do we use light year instead of kilometers? Kilometers would be way to big of a number 4. Change the following number 78,000,000 to scientific notation. 7 ...
Stars and Galaxies - Lunar and Planetary Institute
... from all directions at once radiation left over from the Big Bang In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
... from all directions at once radiation left over from the Big Bang In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
Star Formation
... Three O and B supergiants formed a few millions years ago Show interstellar absorption lines of wrong radial velocity IR shows Horse Head ...
... Three O and B supergiants formed a few millions years ago Show interstellar absorption lines of wrong radial velocity IR shows Horse Head ...
Lectures 10 & 11 powerpoint (stellar formation) [movie below]
... • Hot intercloud medium: Hot (T ~ a few 1000 K), ionized hydrogen (HII); low density (n ~ 0.1 atom/cm3); gas can remain ionized because of very low density. ...
... • Hot intercloud medium: Hot (T ~ a few 1000 K), ionized hydrogen (HII); low density (n ~ 0.1 atom/cm3); gas can remain ionized because of very low density. ...
PPT - Mr.E Science
... Nebula – a huge gas cloud made up mainly of Hydrogen that collapse down on itself and compresses the gas down into a Protostar Star is “born” when the protostar has contracting tight enough for Hydrogen to fuse into Helium, this releases the light and energy we normally associate with a “normal” sta ...
... Nebula – a huge gas cloud made up mainly of Hydrogen that collapse down on itself and compresses the gas down into a Protostar Star is “born” when the protostar has contracting tight enough for Hydrogen to fuse into Helium, this releases the light and energy we normally associate with a “normal” sta ...