Building galaxies Hunt, Leslie Kipp
... central concentration and their stellar content as estimated from composite spectra (Morgan & Mayall 1957). Morgan justified the new system through the observation that the correlation between Hubble stage and spectral class is not always close. Nevertheless, like the Hubble types, the Morgan system ...
... central concentration and their stellar content as estimated from composite spectra (Morgan & Mayall 1957). Morgan justified the new system through the observation that the correlation between Hubble stage and spectral class is not always close. Nevertheless, like the Hubble types, the Morgan system ...
Astrometric accuracy during the past 2000 years
... sqrt(10) because nothing else is available, but this “internal catalogue error” is not given in the catalogue, and it is certainly too small because of the unknown systematic errors. The three tables should ideally contain the “external errors” of a catalogue entry as would be obtained from a compar ...
... sqrt(10) because nothing else is available, but this “internal catalogue error” is not given in the catalogue, and it is certainly too small because of the unknown systematic errors. The three tables should ideally contain the “external errors” of a catalogue entry as would be obtained from a compar ...
Stars: Intro & Classification Astronomy 1 — Elementary Astronomy LA Mission College
... he graph at right to determine which of the two stars (A gives off more green light? Astronomy 1 - Elementary Astronomy LA Mission College ...
... he graph at right to determine which of the two stars (A gives off more green light? Astronomy 1 - Elementary Astronomy LA Mission College ...
Advances in exoplanet science from Kepler (Lissauer et al. 2014)
... spacecraft beyond the original baseline plan, but Kepler’s prime mission ended in May 2013 with the failure of a second reaction wheel that made precise stable pointing away from the spacecraft’s orbital plane impossible. Nevertheless, data analysis over the next few years is expected to reveal hund ...
... spacecraft beyond the original baseline plan, but Kepler’s prime mission ended in May 2013 with the failure of a second reaction wheel that made precise stable pointing away from the spacecraft’s orbital plane impossible. Nevertheless, data analysis over the next few years is expected to reveal hund ...
Conference Abstract Booklet here.
... remains a mystery. This phenomenon has not been extensively studied in firstovertone (RRc) RR Lyrae stars yet. The Optical Gravitational Lensing Experiment (OGLE) is a source of excellent quality photometry for more than 10 000 RRc stars in the Galactic bulge. These stars were monitored regularly fr ...
... remains a mystery. This phenomenon has not been extensively studied in firstovertone (RRc) RR Lyrae stars yet. The Optical Gravitational Lensing Experiment (OGLE) is a source of excellent quality photometry for more than 10 000 RRc stars in the Galactic bulge. These stars were monitored regularly fr ...
Galaxies - WordPress.com
... A galaxies occasionally collide with one another, particularly within cluster of galaxies B galaxies are so closely packed in the universe that they are always interacting with one another C galaxies are so widely separated that they never interact or collide D the universe is composed of one giant ...
... A galaxies occasionally collide with one another, particularly within cluster of galaxies B galaxies are so closely packed in the universe that they are always interacting with one another C galaxies are so widely separated that they never interact or collide D the universe is composed of one giant ...
Introduction
... so far); this is due to the current performance of the stellar nulling techniques which detect planets more easily when they are well outside the residual stellar glare. Most of the exoplanets detected by radial velocity measurements have masses and radii similar to, or larger than Jupiter; this is ...
... so far); this is due to the current performance of the stellar nulling techniques which detect planets more easily when they are well outside the residual stellar glare. Most of the exoplanets detected by radial velocity measurements have masses and radii similar to, or larger than Jupiter; this is ...
3. What are the intrinsic and extrinsic environments of exoplanets?
... We will use the SNHC to clarify what is known about the Sun’s neighbors as potential hosts of habitable exoplanets. We will identify stars that lack critical observations and, where possible, acquire the appropriate data through supplementary observations. In particular, the PU coronagraphic optics ...
... We will use the SNHC to clarify what is known about the Sun’s neighbors as potential hosts of habitable exoplanets. We will identify stars that lack critical observations and, where possible, acquire the appropriate data through supplementary observations. In particular, the PU coronagraphic optics ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
New Worlds, New Horizons in Astronomy and
... scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal governme ...
... scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal governme ...
Exploring Neutral Hydrogen and Galaxy Evolution with the SKA
... distribution in galaxies, as well as insight into the relationship between star formation and the interstellar medium, have been limited to the local universe. Ongoing and upcoming H I surveys on SKA pathfinder instruments will extend these measurements beyond the local universe to intermediate reds ...
... distribution in galaxies, as well as insight into the relationship between star formation and the interstellar medium, have been limited to the local universe. Ongoing and upcoming H I surveys on SKA pathfinder instruments will extend these measurements beyond the local universe to intermediate reds ...
Stars: Stellar Evol & “death” Galaxies Astronomy 1 — Elementary Astronomy
... A. It would inevitably get sucked into the black hole with no possibility of escape. B. It would detect the gravitational pull of the black hole and be able to go into orbit around it. C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole ...
... A. It would inevitably get sucked into the black hole with no possibility of escape. B. It would detect the gravitational pull of the black hole and be able to go into orbit around it. C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole ...
The science case for - Astrophysics
... of which we are made. Perhaps most exotic of all, some new force seems to be stretching space-time, accelerating the expansion of the Universe. The nature of this force, which controls the future of the Universe, remains quite unknown. Astronomy is a technology-enabled science: progress in astronom ...
... of which we are made. Perhaps most exotic of all, some new force seems to be stretching space-time, accelerating the expansion of the Universe. The nature of this force, which controls the future of the Universe, remains quite unknown. Astronomy is a technology-enabled science: progress in astronom ...
The Habitability of Planets Orbiting M
... What was once the realm of science fiction—Earth-sized planets outside of the Solar System, where life might exist—is now scientific fact. At the time of writing, over three thousand confirmed planets have been discovered orbiting other stars1 . Many of these planets are especially captivating becau ...
... What was once the realm of science fiction—Earth-sized planets outside of the Solar System, where life might exist—is now scientific fact. At the time of writing, over three thousand confirmed planets have been discovered orbiting other stars1 . Many of these planets are especially captivating becau ...
Advances in exoplanet science from Kepler
... been quantitatively confirmed (Latham et al. 2011). Data provided by Jason Rowe. ...
... been quantitatively confirmed (Latham et al. 2011). Data provided by Jason Rowe. ...
GALAXIES 626
... (ii) Globular clusters - dense compact clusters distributed in the Galactic halo. Hubble image of the globular cluster M80. In the Milky Way, globular clusters are made up of old stars only. ...
... (ii) Globular clusters - dense compact clusters distributed in the Galactic halo. Hubble image of the globular cluster M80. In the Milky Way, globular clusters are made up of old stars only. ...
Searching for the oldest, most metal-poor stars in the SkyMapper Survey
... 1. Normalize the spectra. The processed and reduced echelle spectra from the MagellanClay telescope for each star are high-resolution (0.7” slit R = λ/∆λ ∼ 30, 000 and 1.0” slit R ∼ 35, 000) line spectra. Each spectrum possess ∼ 30 orders, which are small pieces of the spectrum. The wavelength rang ...
... 1. Normalize the spectra. The processed and reduced echelle spectra from the MagellanClay telescope for each star are high-resolution (0.7” slit R = λ/∆λ ∼ 30, 000 and 1.0” slit R ∼ 35, 000) line spectra. Each spectrum possess ∼ 30 orders, which are small pieces of the spectrum. The wavelength rang ...
here - NASA/IPAC Extragalactic Database
... brightest in any galaxy, although, ironically, their identification is often complicated by the plethora of foreground Galactic yellow dwarfs. As cool red supergiants (RSGs), they flirt with the limits of hydrostatic equilibrium, and are physically the largest stars: if you place one of the biggest ...
... brightest in any galaxy, although, ironically, their identification is often complicated by the plethora of foreground Galactic yellow dwarfs. As cool red supergiants (RSGs), they flirt with the limits of hydrostatic equilibrium, and are physically the largest stars: if you place one of the biggest ...
Joint formation of QSOs and spheroids: QSOs as clocks of star
... galaxies are thought to have formed. Hubble Space Telescope observations, especially the HDF surveys, and ground-based observations with the new 10-metre-class telescopes, have opened to direct investigation also the early phases of galaxy formation. Exploration of the local Universe is also yieldin ...
... galaxies are thought to have formed. Hubble Space Telescope observations, especially the HDF surveys, and ground-based observations with the new 10-metre-class telescopes, have opened to direct investigation also the early phases of galaxy formation. Exploration of the local Universe is also yieldin ...
Thinking Outside the Sphere
... The globe of the earth is illustrated with the figures of Adam and Eve in the Garden of Eden; the narrative of Creation in Genesis is represented by the fish of the sea and birds of the air. The sun, moon, and planets created on the fourth day are shown in the middle region. The thin sphere of the f ...
... The globe of the earth is illustrated with the figures of Adam and Eve in the Garden of Eden; the narrative of Creation in Genesis is represented by the fish of the sea and birds of the air. The sun, moon, and planets created on the fourth day are shown in the middle region. The thin sphere of the f ...
KINEMATIC DISCOVERY OF A STELLAR STREAM LOCATED IN
... RGB stars shown in Figure 1, we selected a smaller velocity range of 75 km s−1 < vgsr < 115 km s−1 . We plotted the positions of stars in Galactic coordinates, and noted that many of these velocity-selected giant stars with metallicities between −2.8 < [Fe/H] < −1.8 are concentrated in a small fract ...
... RGB stars shown in Figure 1, we selected a smaller velocity range of 75 km s−1 < vgsr < 115 km s−1 . We plotted the positions of stars in Galactic coordinates, and noted that many of these velocity-selected giant stars with metallicities between −2.8 < [Fe/H] < −1.8 are concentrated in a small fract ...
sections 23-25 powerpoint
... Answer. The luminosity of the blue regions is dominated by young blue stars, which implies that they are regions of active star formation that must contain significant amounts of gas and dust. The luminosity of the red regions, on the other hand, is dominated by cool red giant stars, which implies ...
... Answer. The luminosity of the blue regions is dominated by young blue stars, which implies that they are regions of active star formation that must contain significant amounts of gas and dust. The luminosity of the red regions, on the other hand, is dominated by cool red giant stars, which implies ...
Masses of Dwarf Satellites of the Milky Way
... Q, for 526 subhaloes in the main halo of the Aq-A-1 simulation. haloes considered contain between 20 000 and nearly ∼10 million . The lines in different colours show averages in logarithmic mass each of the three profiles. ...
... Q, for 526 subhaloes in the main halo of the Aq-A-1 simulation. haloes considered contain between 20 000 and nearly ∼10 million . The lines in different colours show averages in logarithmic mass each of the three profiles. ...
Carbon-enhanced metal-poor stars in dwarf galaxies
... perienced mixing and fallback, hence releasing small amounts of iron and large amounts of carbon and other light elements (Umeda & Nomoto 2003; Iwamoto et al. 2005; Joggerst et al. 2009; Marassi et al. 2014; Tominaga et al. 2014). A reatively good agreement with observations is also obtained by mode ...
... perienced mixing and fallback, hence releasing small amounts of iron and large amounts of carbon and other light elements (Umeda & Nomoto 2003; Iwamoto et al. 2005; Joggerst et al. 2009; Marassi et al. 2014; Tominaga et al. 2014). A reatively good agreement with observations is also obtained by mode ...
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.