Slides from the talk
... cluster's two clouds of hot x-ray emitting gas shown in red. Representing even more mass than the optical galaxies and xray gas combined, the blue hues show the distribution of dark matter in the cluster. Otherwise invisible to telescopic views, the dark matter was mapped by observations of gravitat ...
... cluster's two clouds of hot x-ray emitting gas shown in red. Representing even more mass than the optical galaxies and xray gas combined, the blue hues show the distribution of dark matter in the cluster. Otherwise invisible to telescopic views, the dark matter was mapped by observations of gravitat ...
The Hubble sequence, overview of galaxies
... • Pulsating stars lie on the instability strip in the H-R diagram, in some phases of post-main-sequence evolution • In addition to Cepheid variables, RR Lyrae stars are also pulsating stars which can be used as a distance indicator. They are not as bright as Cepheids, so they are less useful for mea ...
... • Pulsating stars lie on the instability strip in the H-R diagram, in some phases of post-main-sequence evolution • In addition to Cepheid variables, RR Lyrae stars are also pulsating stars which can be used as a distance indicator. They are not as bright as Cepheids, so they are less useful for mea ...
April 2015 - Southern Astronomical Society
... been shown to be insubstantial — passing through itself as well as everything else. A study of data returned from NASA’s Hubble Space Telescope and the ESA’s Chandra X-ray Observatory has found dark matter does not slow down when it collides with itself. This is significant as it shows the ghostly s ...
... been shown to be insubstantial — passing through itself as well as everything else. A study of data returned from NASA’s Hubble Space Telescope and the ESA’s Chandra X-ray Observatory has found dark matter does not slow down when it collides with itself. This is significant as it shows the ghostly s ...
upperMS - CWRU Astronomy
... OBN stars come from mass loss in OB stars Say the CN cycle converts CN in the inner 60% of a star over 15% of its main sequence lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but i ...
... OBN stars come from mass loss in OB stars Say the CN cycle converts CN in the inner 60% of a star over 15% of its main sequence lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but i ...
First Light for May, 2001 - South Bay Astronomical Society
... a lot of faint objects. I started out hunting through all the different globular clusters that swarm around the galactic core like moths around a light. Many were small and faint, but some were small yet very bright. I was way late getting around to M5 which, even though low, was still magnificent. ...
... a lot of faint objects. I started out hunting through all the different globular clusters that swarm around the galactic core like moths around a light. Many were small and faint, but some were small yet very bright. I was way late getting around to M5 which, even though low, was still magnificent. ...
Document
... You need a reference point source (star) for the wavefront measurement. The reference star must be within the isoplanatic angle, of about 10-30 arcseconds If there is no bright (mag ~ 14-15) nearby star then you must use an artificial star or „laser guide star“. All laser guide AO systems use a sodi ...
... You need a reference point source (star) for the wavefront measurement. The reference star must be within the isoplanatic angle, of about 10-30 arcseconds If there is no bright (mag ~ 14-15) nearby star then you must use an artificial star or „laser guide star“. All laser guide AO systems use a sodi ...
PSU/TCfA search for planets around evolved stars
... giants also requires detailed knowledge of their physical parameters. Effective temperatures and gravitational accelerations are needed to obtain luminosities and in turn, with additional knowledge of metallicities, an estimate of stellar mass and age through isochrone fitting. Together with estimat ...
... giants also requires detailed knowledge of their physical parameters. Effective temperatures and gravitational accelerations are needed to obtain luminosities and in turn, with additional knowledge of metallicities, an estimate of stellar mass and age through isochrone fitting. Together with estimat ...
An Ancient Universe
... In similar ways, astronomers have also found Bang to today into one calendar year. On that scale, the ways of establishing the scale of cosmic time. These dinosaurs would have flourished a mere few days ago, measurements show that the universe had its beginnings about 14 billion years ago in a very ...
... In similar ways, astronomers have also found Bang to today into one calendar year. On that scale, the ways of establishing the scale of cosmic time. These dinosaurs would have flourished a mere few days ago, measurements show that the universe had its beginnings about 14 billion years ago in a very ...
HERE - Montana State University Extended University
... of liquid water on a planet’s surface. This suggests we should first search for a planet that rests in orbit around a Sun-like star (classes F, G or K) within the star’s zone of habitability. In addition to the distance from the star, the planet must also have a suitable atmosphere. This requires th ...
... of liquid water on a planet’s surface. This suggests we should first search for a planet that rests in orbit around a Sun-like star (classes F, G or K) within the star’s zone of habitability. In addition to the distance from the star, the planet must also have a suitable atmosphere. This requires th ...
Galaxies and the Universe bb
... have supermassive black holes at their centers. • These black holes seem to be ________ active ...
... have supermassive black holes at their centers. • These black holes seem to be ________ active ...
Current status of Subaru Telescope
... • Connection from COMICS to control building 2F is always checked • Reception of signal by telescope control system can only be done by actually chopping M2 • We are investigating a safe way to confirm reception – It would be very useful to have non-sidereal guiding implemented for solar system targ ...
... • Connection from COMICS to control building 2F is always checked • Reception of signal by telescope control system can only be done by actually chopping M2 • We are investigating a safe way to confirm reception – It would be very useful to have non-sidereal guiding implemented for solar system targ ...
Kepler and K2 Missions | NASA
... complex topic that has been covered elsewhere in the literature.7 However, two examples from Kepler are provided here to highlight some concepts to consider when defining requirements for space-astronomy missions: 1) Be aware of the far-reaching implications (cross-cutting) scope of requirements. Ex ...
... complex topic that has been covered elsewhere in the literature.7 However, two examples from Kepler are provided here to highlight some concepts to consider when defining requirements for space-astronomy missions: 1) Be aware of the far-reaching implications (cross-cutting) scope of requirements. Ex ...
12/08/14-- Student ID ______ TA Name
... 6. What information about these 4 stars could be inferred directly from values on this chart? a. The approximate distances they are from Earth in parsecs. b. Whether or not they will go supernovae or form planetary nebulae. c. Fairly reliable estimates of their surface temperatures. d. Their paralla ...
... 6. What information about these 4 stars could be inferred directly from values on this chart? a. The approximate distances they are from Earth in parsecs. b. Whether or not they will go supernovae or form planetary nebulae. c. Fairly reliable estimates of their surface temperatures. d. Their paralla ...
Chapter 20. Galaxies
... As you worked out in one of your problem set questions (and review the answer sheet if you didn’t get it right!), if we observe v = constant, instead of a falling v, we can infer (assuming that laws of gravity still hold even over the great distances of a galaxy’s radius) that Mr must be growing wit ...
... As you worked out in one of your problem set questions (and review the answer sheet if you didn’t get it right!), if we observe v = constant, instead of a falling v, we can infer (assuming that laws of gravity still hold even over the great distances of a galaxy’s radius) that Mr must be growing wit ...
The New Worlds Observer
... are already being found and the incidence of planets seems to be rising to lower mass. It is likely that HZ is near unity and Kepler will measure that number within a few more years. Even if this turns out to not be the case, NWO is robust against a wide range of HZ values since the size of the st ...
... are already being found and the incidence of planets seems to be rising to lower mass. It is likely that HZ is near unity and Kepler will measure that number within a few more years. Even if this turns out to not be the case, NWO is robust against a wide range of HZ values since the size of the st ...
PRESENTAZIONE WORKSHOP ASDC
... Large but efficient integrated team working on NHXM for almost 2 years. Once again, demonstrated ability for such a team, to deal and interact productively with other international partners. ...
... Large but efficient integrated team working on NHXM for almost 2 years. Once again, demonstrated ability for such a team, to deal and interact productively with other international partners. ...
Light and Telescopes II
... Must be done from space Gamma rays can not be focused, so only detectors are used ...
... Must be done from space Gamma rays can not be focused, so only detectors are used ...
PPT 15MB - HubbleSOURCE
... Amazing network of long, straight filaments seen in great detail for first time in ionized gas; some of them follow magnetic field lines; New compact nebulae discovered with young massive stars, ranging from early to late stages of star formation Many candidate massive stars identified by brig ...
... Amazing network of long, straight filaments seen in great detail for first time in ionized gas; some of them follow magnetic field lines; New compact nebulae discovered with young massive stars, ranging from early to late stages of star formation Many candidate massive stars identified by brig ...
View PDF - Sara Seager
... has grown dramatically since the first planet orbiting a Sun-like star of almost all masses, sizes, and J orbits have been detected (Fig. 1), was discovered nearly 20 years ago S (1). Nearly 1000 exoplanets are illustrating not only the stochastic ...
... has grown dramatically since the first planet orbiting a Sun-like star of almost all masses, sizes, and J orbits have been detected (Fig. 1), was discovered nearly 20 years ago S (1). Nearly 1000 exoplanets are illustrating not only the stochastic ...
Dark Matter— More Than Meets The Eye
... dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All these phenomena are baryonic. There is some observational evidence for the existence of MACHOs. Because they can warp ...
... dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All these phenomena are baryonic. There is some observational evidence for the existence of MACHOs. Because they can warp ...
Lecture Notes
... – show a wide range in size/luminosity, ranging from ‘dwarf ellipticals’ to ‘giant ellipticals’ (‘cD’ galaxies), corresponding to masses of ∼ 107 –1012 solar masses. In modern terms, the Hubble classification scheme can be seen as reflecting the degree of present-day star formation, or (equivalently ...
... – show a wide range in size/luminosity, ranging from ‘dwarf ellipticals’ to ‘giant ellipticals’ (‘cD’ galaxies), corresponding to masses of ∼ 107 –1012 solar masses. In modern terms, the Hubble classification scheme can be seen as reflecting the degree of present-day star formation, or (equivalently ...
HEIC0307: FOR RELEASE 18:00 (CEST) 09 May, 2003 Photo
... photo taken by Kitt Peak's Mosaic Camera. The result is a breathtaking look down a tunnel of glowing gases that is a million million kilometres long. The fluorescing tube is pointed nearly directly at Earth, so it looks more like a bubble than a cylinder. Thousands of comet-like filaments embedded a ...
... photo taken by Kitt Peak's Mosaic Camera. The result is a breathtaking look down a tunnel of glowing gases that is a million million kilometres long. The fluorescing tube is pointed nearly directly at Earth, so it looks more like a bubble than a cylinder. Thousands of comet-like filaments embedded a ...
An analogy
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
... – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a few bandpasses, and not necessarily those observed for nearby galaxies – select ...
Binary Stars - Mid-Pacific Institute
... These systems are determined by the presence of spectral lines: lines of color that are anomalies in an otherwise continuous spectrum and are one of the only ways of determining whether a second star is present It is possible for a binary star system to be both a visual and a spectroscopic binar ...
... These systems are determined by the presence of spectral lines: lines of color that are anomalies in an otherwise continuous spectrum and are one of the only ways of determining whether a second star is present It is possible for a binary star system to be both a visual and a spectroscopic binar ...
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.