Lecture8_v2 - Lick Observatory
... there and produce a single whirl, in which, colliding with one another and revolving in all manner of ways, they begin to separate like to like. ...
... there and produce a single whirl, in which, colliding with one another and revolving in all manner of ways, they begin to separate like to like. ...
5Cardeberg.pdf
... planetary-system central stars does not support this, although no definite contradiction exists. Still, gas giant planets are abundant enough not to be anomalous. For formation of massive planets in circum-stellar discs, theorists identify a mass limit around ten Jupiter masses (Bate et al., 2003). ...
... planetary-system central stars does not support this, although no definite contradiction exists. Still, gas giant planets are abundant enough not to be anomalous. For formation of massive planets in circum-stellar discs, theorists identify a mass limit around ten Jupiter masses (Bate et al., 2003). ...
The Search for the Earliest Galaxies
... Just twenty years ago, astronomers could only see galaxies in any detail out to a distance of approximately 7 billion lightyears—about halfway across the known universe. Thanks to Hubble and other modern observatories, this situation has changed dramatically in the past two decades. Finding fainter ...
... Just twenty years ago, astronomers could only see galaxies in any detail out to a distance of approximately 7 billion lightyears—about halfway across the known universe. Thanks to Hubble and other modern observatories, this situation has changed dramatically in the past two decades. Finding fainter ...
Slide 1
... – If the stars are closely spaced, and the planet has a large orbit around both stars— yes! (Such planets, like Kepler 16b and Kepler 47(AB)b, have been discovered.) – If the planet’s orbit is on the same size scale as the star’s orbits—no! Even if they are not, only about 25% of M stars are in mult ...
... – If the stars are closely spaced, and the planet has a large orbit around both stars— yes! (Such planets, like Kepler 16b and Kepler 47(AB)b, have been discovered.) – If the planet’s orbit is on the same size scale as the star’s orbits—no! Even if they are not, only about 25% of M stars are in mult ...
ppt
... • Every output class needs substantial representation in the training set. • Overlap between classes should be minimized. • Classifier accuracy can be improved with additional information (i.e., flux in different bandpass), but not always! ...
... • Every output class needs substantial representation in the training set. • Overlap between classes should be minimized. • Classifier accuracy can be improved with additional information (i.e., flux in different bandpass), but not always! ...
Estudio de Cúmulos de Galaxias en el Sloan Digital Sky Survey
... Submillimetre galaxies (SMGs) • Star-forming galaxies at high z (z ~2-3) • SMGs discovered using SCUBA instrument on the JCMT telescope (850 µm). ...
... Submillimetre galaxies (SMGs) • Star-forming galaxies at high z (z ~2-3) • SMGs discovered using SCUBA instrument on the JCMT telescope (850 µm). ...
The Transiting Exoplanet Survey Satellite
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
Than Our Eyes Can See - Cool Cosmos
... http://www.ipac.caltech.edu/2mass 2MASS is an all-sky, ground-based survey at three near-IR wavelengths, conducted with a pair of 1.3-meter diameter telescopes located in Arizona and in Chile. Survey operations began in 1997, and will be completed in 2000. The 2MASS data are publicly accessible via ...
... http://www.ipac.caltech.edu/2mass 2MASS is an all-sky, ground-based survey at three near-IR wavelengths, conducted with a pair of 1.3-meter diameter telescopes located in Arizona and in Chile. Survey operations began in 1997, and will be completed in 2000. The 2MASS data are publicly accessible via ...
4 Distances in Astronomy
... The parallax method is limited to determining distances for relatively nearby stars, because otherwise the parallax angle becomes too small to measure reliably. The best ground-based telescopes can achieve a resolution of about 0:500 , which can sometimes be reduced to about 0:0100 by averaging over ...
... The parallax method is limited to determining distances for relatively nearby stars, because otherwise the parallax angle becomes too small to measure reliably. The best ground-based telescopes can achieve a resolution of about 0:500 , which can sometimes be reduced to about 0:0100 by averaging over ...
The Spitzer Space Telescope
... NASA I, SSC. 2003. GLIMPSE. http://www.astro.wisc.edu/sirtf/ NASA J. 2011. Stars gather in downtown milky-way. http://www.spitzer.caltech.edu/images/3560-sig11-003-Stars-Gather-inDowntown-Milky-Way NASA J, Harvard-Smithsonian CFA. 2012. Goings on around star forming town. http://www.spitzer.caltech ...
... NASA I, SSC. 2003. GLIMPSE. http://www.astro.wisc.edu/sirtf/ NASA J. 2011. Stars gather in downtown milky-way. http://www.spitzer.caltech.edu/images/3560-sig11-003-Stars-Gather-inDowntown-Milky-Way NASA J, Harvard-Smithsonian CFA. 2012. Goings on around star forming town. http://www.spitzer.caltech ...
CH10.AST1001.F16.EDS
... without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. • Transits give us direct measurements of masses. ...
... without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. • Transits give us direct measurements of masses. ...
Set 2: Nature of Galaxies
... • Non-constancy of the Ωlp will still cause winding but of the pattern and typically at a slower rate for (1, 2). • Where the local pattern speed matches the global pattern speed Lindblad resonances occur where the epicyclic amplitude increases due to forcing from the local density enhancement - can ...
... • Non-constancy of the Ωlp will still cause winding but of the pattern and typically at a slower rate for (1, 2). • Where the local pattern speed matches the global pattern speed Lindblad resonances occur where the epicyclic amplitude increases due to forcing from the local density enhancement - can ...
Telescopes of the Future
... All of the largest telescopes have been built as multiple units in anticipation of interferometry: Europe’s Very Large Telescope (VLT) consists of four telescopes, while the Keck and Large Binocular Telescope (LBT) each have two (figure 1). Because the LBT mirrors are on a common mounting and closel ...
... All of the largest telescopes have been built as multiple units in anticipation of interferometry: Europe’s Very Large Telescope (VLT) consists of four telescopes, while the Keck and Large Binocular Telescope (LBT) each have two (figure 1). Because the LBT mirrors are on a common mounting and closel ...
PPT - ALFALFA survey
... • Since it is a “blind” HI survey, it does not suffer from optical selection effects and therefore offers a unique, unbiased look at the gas-rich galaxy population in the local universe. • Over 30% of the ADBS galaxies have never been included in any optical catalog, and ~50% are fainter than the Up ...
... • Since it is a “blind” HI survey, it does not suffer from optical selection effects and therefore offers a unique, unbiased look at the gas-rich galaxy population in the local universe. • Over 30% of the ADBS galaxies have never been included in any optical catalog, and ~50% are fainter than the Up ...
Chapter 16
... Mutual gravitation between the cloud’s parts pulled it together. 2. The center portion was the first to become dense enough for stars to form. Dense pockets in orbit around the center became globular clusters. 3. The initial cloud had some rotation, and as it contracted it spun faster. The rotating ...
... Mutual gravitation between the cloud’s parts pulled it together. 2. The center portion was the first to become dense enough for stars to form. Dense pockets in orbit around the center became globular clusters. 3. The initial cloud had some rotation, and as it contracted it spun faster. The rotating ...
Determining Distances to Other Galaxies
... If stars in the disk of a spiral galaxy are on slightly eccentric orbits, and the position angle of these ellipses vary with radius, a spiral-shaped density wave can be formed from a set of nested ovals. Density wave theory is really based on the premise that mutual gravitational attraction of stars ...
... If stars in the disk of a spiral galaxy are on slightly eccentric orbits, and the position angle of these ellipses vary with radius, a spiral-shaped density wave can be formed from a set of nested ovals. Density wave theory is really based on the premise that mutual gravitational attraction of stars ...
flare swg usa
... Clusters of embedded protostars inside dark cores along the Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with Spitzer (24-8-3.5) defined by the large beam of Herschel observations. ...
... Clusters of embedded protostars inside dark cores along the Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with Spitzer (24-8-3.5) defined by the large beam of Herschel observations. ...
argo and other tidal structures around the milky way
... Y = 0 kpc. A number of known structures can be seen in these plots: The Monoceros stream, Sagittarius, the TriAnd and Perseus systems (Rocha-Pinto et al. 2004). The large southern hemisphere stellar group from 5 to 15 kpc from the Sun, between 220◦ < l < 300◦ comprises the presumed center of the Mon ...
... Y = 0 kpc. A number of known structures can be seen in these plots: The Monoceros stream, Sagittarius, the TriAnd and Perseus systems (Rocha-Pinto et al. 2004). The large southern hemisphere stellar group from 5 to 15 kpc from the Sun, between 220◦ < l < 300◦ comprises the presumed center of the Mon ...
Summary: Star Formation Near and Far
... contradict the theoretical models in this respect. Now it is clear that infall, outflow, and rotation are all present simultaneously in many cases, and that continuing infall effects can indeed be seen when one looks hard enough. Even though we still do not understand in any detail the origin of the ...
... contradict the theoretical models in this respect. Now it is clear that infall, outflow, and rotation are all present simultaneously in many cases, and that continuing infall effects can indeed be seen when one looks hard enough. Even though we still do not understand in any detail the origin of the ...
Searching for Dwarf Galaxies and Population III Star
... Authors: Elizabeth J. Barton, Center for Cosmology, University of California, Irvine Abstract: Metal-free stars in the early universe will inhabit regions of space that have not yet been chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volume ...
... Authors: Elizabeth J. Barton, Center for Cosmology, University of California, Irvine Abstract: Metal-free stars in the early universe will inhabit regions of space that have not yet been chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volume ...
slides - quantware mips center
... R.Mathieu et al., 2000, in: Protostars and Planets IV, Univ. Arizona Press, p.703). Planets are known to belong to ~130 multiple stars (all in all ~2600 exoplanet systems are known). Most of the planets discovered in binary systems follow inner orbits (Stype, around one of the components of a binary ...
... R.Mathieu et al., 2000, in: Protostars and Planets IV, Univ. Arizona Press, p.703). Planets are known to belong to ~130 multiple stars (all in all ~2600 exoplanet systems are known). Most of the planets discovered in binary systems follow inner orbits (Stype, around one of the components of a binary ...
13_Lecture_Outline
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us. • Doppler data give us lower limits on masses. © 2010 Pearson Education, Inc. ...
Habitability of super-Earth planets around main
... early F stars) in the context of exobiology. Towards the low mass limit at about 0.5 M⊙, there are virtually no stellar evolutionary changes for these stars while being on the mainsequence owing to the current age of the Universe. However, regarding M-type stars, adverse influences on the origin and ...
... early F stars) in the context of exobiology. Towards the low mass limit at about 0.5 M⊙, there are virtually no stellar evolutionary changes for these stars while being on the mainsequence owing to the current age of the Universe. However, regarding M-type stars, adverse influences on the origin and ...
The formation of the galaxy is believed to be similar
... One model for the formation of the Milky Way can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most lik ...
... One model for the formation of the Milky Way can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most lik ...
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.