Extragalactic Astrophysics 1 AA 2011-2012 Prof. LA Antonelli
... differential rotation affects transverse and radial velocities with respect to Sun, and was indeed discovered from proper motions of nearby stars towards galactic center, we see stars going ahead and in the opposite direction stars remain behind, with respect to Sun. stars in the same galactocentric ...
... differential rotation affects transverse and radial velocities with respect to Sun, and was indeed discovered from proper motions of nearby stars towards galactic center, we see stars going ahead and in the opposite direction stars remain behind, with respect to Sun. stars in the same galactocentric ...
The Hertzsprung-Russell Diagram
... (individual masses can be gotten if you have a signal from both stars) The orbital period comes from watching the stars, or the periodic variation of their velocity or brightness. To get orbital semimajor axis, you need either the parallax to a visual system or the velocity from a spectroscopic syst ...
... (individual masses can be gotten if you have a signal from both stars) The orbital period comes from watching the stars, or the periodic variation of their velocity or brightness. To get orbital semimajor axis, you need either the parallax to a visual system or the velocity from a spectroscopic syst ...
Determination of spiral orbits with constant tangential velocity
... Near to the center, the measured velocity agrees really well with the calculation. However, for greater distances from the center a surprising discrepancy appears. The measured velocities are nearly independent from the distance to the center. The red curve shows the measurement four our own Milky W ...
... Near to the center, the measured velocity agrees really well with the calculation. However, for greater distances from the center a surprising discrepancy appears. The measured velocities are nearly independent from the distance to the center. The red curve shows the measurement four our own Milky W ...
Search For Dark Matters Essay Research Paper
... The way in which dark matter reveals its presence to us is through the gravitational effect it exerts on luminous matter in the universe. (\”Luminous\” matter is the matter we can see with our telescopes.) The most obvious example of the gravitational effects of dark matter can be observed when look ...
... The way in which dark matter reveals its presence to us is through the gravitational effect it exerts on luminous matter in the universe. (\”Luminous\” matter is the matter we can see with our telescopes.) The most obvious example of the gravitational effects of dark matter can be observed when look ...
Galaxies Galaxies M81
... individually in space, galaxies are grouped in clusters ranging in size from a few dozens to thousands of galaxies. The Coma Cluster, shown at right, is 300 million light years from the Milky Way and contains more than 1,000 (and possibly as many as 10,000) galaxies. ...
... individually in space, galaxies are grouped in clusters ranging in size from a few dozens to thousands of galaxies. The Coma Cluster, shown at right, is 300 million light years from the Milky Way and contains more than 1,000 (and possibly as many as 10,000) galaxies. ...
Slide 1 - Physics @ IUPUI
... • RR Lyrae – lower mass stars after they undergo their Helium flash (the sun will do this someday). • RR Lyrae are Horizontal Branch stars. • Metal rich and Metal poor Cepheid variables (Type I and II). • These are the higher mass stars which pass back and forth through the instability strip. ...
... • RR Lyrae – lower mass stars after they undergo their Helium flash (the sun will do this someday). • RR Lyrae are Horizontal Branch stars. • Metal rich and Metal poor Cepheid variables (Type I and II). • These are the higher mass stars which pass back and forth through the instability strip. ...
ppt
... After era probed by WMAP the Universe enters the so-called “dark ages” prior to formation of first stars ...
... After era probed by WMAP the Universe enters the so-called “dark ages” prior to formation of first stars ...
Test 3 Version 3 1. Milky Way halo stars follow: (a) differential
... A have been proven to exist by direct observation, i.e. we can see the black hole itself B probably do not exist C may be inferred to exist from observations in the last few decades D can be produced in the laboratory ...
... A have been proven to exist by direct observation, i.e. we can see the black hole itself B probably do not exist C may be inferred to exist from observations in the last few decades D can be produced in the laboratory ...
3Nov_2014
... • We can follow a stars evolution on the HR diagram. • Lower mass stars move on to the main sequence, stay for a while, and eventually move through giant stages before becoming white dwarfs • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a su ...
... • We can follow a stars evolution on the HR diagram. • Lower mass stars move on to the main sequence, stay for a while, and eventually move through giant stages before becoming white dwarfs • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a su ...
Caribbean - Telescopes
... Have a chat about how far the Six could see Find out what was the farthest thing that they could make out Ask the Six to compare the three results and to find out the positives and negatives of the three methods ...
... Have a chat about how far the Six could see Find out what was the farthest thing that they could make out Ask the Six to compare the three results and to find out the positives and negatives of the three methods ...
ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson
... (c) Experiments conducted by accelerating observers are equivalent to those carried out by stationary observers (d) The effects of velocity and gravity are equivalent 18. As we look at stars closer and closer to the exact center of the Milky Way galaxy, the velocities of the stars: (a) Decrease (b) ...
... (c) Experiments conducted by accelerating observers are equivalent to those carried out by stationary observers (d) The effects of velocity and gravity are equivalent 18. As we look at stars closer and closer to the exact center of the Milky Way galaxy, the velocities of the stars: (a) Decrease (b) ...
The Planetarium Fleischmann Planetarium
... observations do not detect the putative planet directly, so the astronomers cannot measure its mass. They will, instead, conduct computer simulations of the ring’s dynamics to estimate the planet’s mass. Kalas and collaborators James R. Graham of the University of California at Berkeley and Mark Cla ...
... observations do not detect the putative planet directly, so the astronomers cannot measure its mass. They will, instead, conduct computer simulations of the ring’s dynamics to estimate the planet’s mass. Kalas and collaborators James R. Graham of the University of California at Berkeley and Mark Cla ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... “Sky-Notes” of the Open University Astronomy Club. April 2005. All times shown are UT. ...
... “Sky-Notes” of the Open University Astronomy Club. April 2005. All times shown are UT. ...
Synthetic color-magnitude diagrams: the ingredients
... field binaries within 100 parsecs from the Sun. The binary systems located in the local field has been also studied by Tout (1991), who suggested that the f(q) function can be derived by randomly extracting secondary stars from the “adopted” (observed) initial mass function; ...
... field binaries within 100 parsecs from the Sun. The binary systems located in the local field has been also studied by Tout (1991), who suggested that the f(q) function can be derived by randomly extracting secondary stars from the “adopted” (observed) initial mass function; ...
Slides
... Multi-epoch data set with return to each point on the sky approximately every 4 nights for up to 10 years. A new 10 square degree field every 40 seconds. Prompt alerts (within 60 seconds of detection) to transients. Deliverables Archive over 3 billion galaxies with photometric redshifts to z = 3. De ...
... Multi-epoch data set with return to each point on the sky approximately every 4 nights for up to 10 years. A new 10 square degree field every 40 seconds. Prompt alerts (within 60 seconds of detection) to transients. Deliverables Archive over 3 billion galaxies with photometric redshifts to z = 3. De ...
Stars: radius and mass
... Stars come in a variety of sizes • If we know luminosity and temperature, then we can find the radius: ...
... Stars come in a variety of sizes • If we know luminosity and temperature, then we can find the radius: ...
astep - Institut d`Astrophysique de Paris
... We foresee that exoplanetology will have as its core the study of transiting exoplanets ...
... We foresee that exoplanetology will have as its core the study of transiting exoplanets ...
Larger, high-res file, best for printing
... sleep. But after nearly three solid weeks of cloud, rain, and fog blanketing the San Francisco Bay Area, with Sun rare and stars rarer — the stars were out in that wee hour of last November 4th. So I was too, to search for Comet Hartley 2. The icy cosmic wayfarer had slipped across the northern cons ...
... sleep. But after nearly three solid weeks of cloud, rain, and fog blanketing the San Francisco Bay Area, with Sun rare and stars rarer — the stars were out in that wee hour of last November 4th. So I was too, to search for Comet Hartley 2. The icy cosmic wayfarer had slipped across the northern cons ...
notes
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
The galaxies that host powerful radio sources
... • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
... • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
The “Astronomical Horizons” Public Lecture Junk to fill page Series
... elements in the periodic table comprise only a small fraction of the total mass, although they still are vitally important because all the stars in all the galaxies we can see, not to mention all the people and all the planets, are made up of these elements. According to our best models of cosmic ev ...
... elements in the periodic table comprise only a small fraction of the total mass, although they still are vitally important because all the stars in all the galaxies we can see, not to mention all the people and all the planets, are made up of these elements. According to our best models of cosmic ev ...
Dark Matter: Observational Constraints Properties of Dark Matter:
... • Hot, X-ray emitting gas is observed to be insufficient • Warm, 104 K ionized gas emits by bremstrahlung. If in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; i ...
... • Hot, X-ray emitting gas is observed to be insufficient • Warm, 104 K ionized gas emits by bremstrahlung. If in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; i ...
Milky Way thin disk
... Q: in order to study the spatial distribution of the thin disk (which dominates the Milky Way luminosity) surface photometry in the K band from space has been used. What is the advantage of the K band? What sort of stars give off most of their light at 2 ...
... Q: in order to study the spatial distribution of the thin disk (which dominates the Milky Way luminosity) surface photometry in the K band from space has been used. What is the advantage of the K band? What sort of stars give off most of their light at 2 ...
Document
... of iron. Other elements – hydrogen, helium, carbon, oxygen, and silicon, burn in successive layers (moving ...
... of iron. Other elements – hydrogen, helium, carbon, oxygen, and silicon, burn in successive layers (moving ...
WASP-24b: A New Transiting Close-in Hot Jupiter
... Large scale, ground-based surveys for transiting planets are yielding a surprisingly diverse set of close-in giant planets. The last few years have seen the discovery of a number of so-called ‘bloated’ close-in Jovian planets, for example WASP-17 b (Anderson et al. 2010) and Kepler-7 b (Latham et al ...
... Large scale, ground-based surveys for transiting planets are yielding a surprisingly diverse set of close-in giant planets. The last few years have seen the discovery of a number of so-called ‘bloated’ close-in Jovian planets, for example WASP-17 b (Anderson et al. 2010) and Kepler-7 b (Latham et al ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.