Understanding the Astrophysics of Galaxy Evolution: the role of
... correlated with dark matter halo mass and so the best link to the underlying cosmological model. A survey must be large (∼ few ×105 galaxies) in order to disentangle covariances in the physical properties of galaxies. One reason it is so difficult to understand how galaxies form is because almost al ...
... correlated with dark matter halo mass and so the best link to the underlying cosmological model. A survey must be large (∼ few ×105 galaxies) in order to disentangle covariances in the physical properties of galaxies. One reason it is so difficult to understand how galaxies form is because almost al ...
Kepler423b: a half-Jupiter mass planet transiting a very old solar
... We report the spectroscopic confirmation of the Kepler object of interest KOI-183.01 (Kepler-423b), a half-Jupiter mass planet transiting an old solar-like star every 2.7 days. Our analysis is the first to combine the full Kepler photometry (quarters 1-17) with high-precision radial velocity measure ...
... We report the spectroscopic confirmation of the Kepler object of interest KOI-183.01 (Kepler-423b), a half-Jupiter mass planet transiting an old solar-like star every 2.7 days. Our analysis is the first to combine the full Kepler photometry (quarters 1-17) with high-precision radial velocity measure ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... errors, we determined the masses and ages of our stars using the procedure outlined in Ramírez et al. (2014,their Section 4.5). Briefly, the location of each star on stellar parameter space was compared withthat of stellar interior and evolutionary model predictions. The Yonsei-Yale isochrone grid ...
... errors, we determined the masses and ages of our stars using the procedure outlined in Ramírez et al. (2014,their Section 4.5). Briefly, the location of each star on stellar parameter space was compared withthat of stellar interior and evolutionary model predictions. The Yonsei-Yale isochrone grid ...
The Norman Lockyer plate archive collection
... elements, which Lockyer used to identify atoms present in the Sun. A collection of spectra of 36 metallic elements made in 1874-1879 remains in our archives ...
... elements, which Lockyer used to identify atoms present in the Sun. A collection of spectra of 36 metallic elements made in 1874-1879 remains in our archives ...
Rocky planetesimals as the origin of metals in DZ stars
... in sufficient density a few to several times per Galactic orbit (on average) for the solar neighbourhood (Dupuis et al. 1992, 1993a; Dupuis, Fontaine & Wesemael 1993b). Several factors have continually challenged the ISM pollution scenario. First, the typical dearth of hydrogen relative to calcium i ...
... in sufficient density a few to several times per Galactic orbit (on average) for the solar neighbourhood (Dupuis et al. 1992, 1993a; Dupuis, Fontaine & Wesemael 1993b). Several factors have continually challenged the ISM pollution scenario. First, the typical dearth of hydrogen relative to calcium i ...
WIMPs and MACHOs - Caltech Astronomy
... Supersymmetry is a new hypothetical symmetry of nature that relates bosons and fermions. If supersymmetry exists in nature then every known particle should have a supersymmetric partner. Bosonic ordinary particles have fermonic superpartners with the same name except with the suffix ‘ino’ added, whi ...
... Supersymmetry is a new hypothetical symmetry of nature that relates bosons and fermions. If supersymmetry exists in nature then every known particle should have a supersymmetric partner. Bosonic ordinary particles have fermonic superpartners with the same name except with the suffix ‘ino’ added, whi ...
ASPEN WORKSHOP 2003
... Mestel disk strictly conserves ang momentum in collapse to get flat rotation curve [Norman et al 1980 thesis got this numerically] “Solves the problems of black hole and star formation.” Jimenez—Cosmological Info from Galaxy Spectra Measuring H(z) gives you equation of state of dark energy (otherwis ...
... Mestel disk strictly conserves ang momentum in collapse to get flat rotation curve [Norman et al 1980 thesis got this numerically] “Solves the problems of black hole and star formation.” Jimenez—Cosmological Info from Galaxy Spectra Measuring H(z) gives you equation of state of dark energy (otherwis ...
Slide 1
... Astronomical abundance scale: normalized to H, the most-abundant element in universe eH = 1012 atoms converted to log scale: A(H) = log eH = 12 abundances are measured relative to H, e.g., N(Fe)/N(H) log eFe = log { N(Fe)/N(H) } + 12 used for H-rich systems: stars, ISM Cosmochemical abundance scale: ...
... Astronomical abundance scale: normalized to H, the most-abundant element in universe eH = 1012 atoms converted to log scale: A(H) = log eH = 12 abundances are measured relative to H, e.g., N(Fe)/N(H) log eFe = log { N(Fe)/N(H) } + 12 used for H-rich systems: stars, ISM Cosmochemical abundance scale: ...
The Neptune Trojans: a window on the birth of the solar system
... orbital stability located 60° ahead and behind the planet in its orbit, respectively), orbiting the Sun with periods approximately equal to that of the giant planet. Any that leave the Trojan clouds (perhaps nudged through collisions, or perturbed by the distant gravitational influence of other plan ...
... orbital stability located 60° ahead and behind the planet in its orbit, respectively), orbiting the Sun with periods approximately equal to that of the giant planet. Any that leave the Trojan clouds (perhaps nudged through collisions, or perturbed by the distant gravitational influence of other plan ...
Concert program - DaCapo Chamber Choir
... Our mid-season concert is a reflection on regeneration, taking its main thematic impetus from the fabulous The Passing of the Year cycle by British composer, Jonathan Dove. The concert marks the turning point between rest (November) and new beginning (May). Our concert opens in the midst of a nature ...
... Our mid-season concert is a reflection on regeneration, taking its main thematic impetus from the fabulous The Passing of the Year cycle by British composer, Jonathan Dove. The concert marks the turning point between rest (November) and new beginning (May). Our concert opens in the midst of a nature ...
The Nature of the Stars
... The Motion of Barnard’s Star Three photographs taken over a four-year period were combined to show the motion of Barnard’s star, which lies 1.82 parsecs away in the constellation Ophiuchus. Over this time interval, Barnard’s star moved more than 41 arcseconds on the celestial sphere (about 0.69 arcm ...
... The Motion of Barnard’s Star Three photographs taken over a four-year period were combined to show the motion of Barnard’s star, which lies 1.82 parsecs away in the constellation Ophiuchus. Over this time interval, Barnard’s star moved more than 41 arcseconds on the celestial sphere (about 0.69 arcm ...
Bad Seeing Bad Focus Bad Guiding
... 9 One should keep in mind that guiding is a second order correction for the location on the sky in which is telescope is pointing. The first order correction is, of course, tracking. If the tracking is not working well, it will be next to impossible to obtain good images, regardless of how the guide ...
... 9 One should keep in mind that guiding is a second order correction for the location on the sky in which is telescope is pointing. The first order correction is, of course, tracking. If the tracking is not working well, it will be next to impossible to obtain good images, regardless of how the guide ...
Epsilon Aurigae: a rare stellar eclipse - Project VS
... The eclipse started in early September 2009. Having a year ahead, scientists had quite a bit of time to perform wide range of measurements and reconstruct the system with properties explaining the behavior. It is not an single night event, where the data have to be collected within minutes/hours, ge ...
... The eclipse started in early September 2009. Having a year ahead, scientists had quite a bit of time to perform wide range of measurements and reconstruct the system with properties explaining the behavior. It is not an single night event, where the data have to be collected within minutes/hours, ge ...
isaac newton`s historia cometarum and the quest for elliptical orbits
... Sun. The years with two comets were probably selected for similarity to the situation in 1680. Incidental to these compilations, a table of lunar distances was copied from Cometographia. Instead, DMCII, Section 10 listed Riccioli’s mean lunar distances supplemented by Flamsteed’s value.37 Descartes ...
... Sun. The years with two comets were probably selected for similarity to the situation in 1680. Incidental to these compilations, a table of lunar distances was copied from Cometographia. Instead, DMCII, Section 10 listed Riccioli’s mean lunar distances supplemented by Flamsteed’s value.37 Descartes ...
The Gaseous Halo of NGC 891 Edmund Hodges-Kluck Joel Bregman
... Mʘ/yr (2T model expects >3) • Observed vs. expected scale height —Hobs (4-5 kpc) measured assuming hydrostatic equilibrium —Hexp from cooling time (3 kpc for 2T) • Are we really hiding most of the emission behind Galactic HI column?? ...
... Mʘ/yr (2T model expects >3) • Observed vs. expected scale height —Hobs (4-5 kpc) measured assuming hydrostatic equilibrium —Hexp from cooling time (3 kpc for 2T) • Are we really hiding most of the emission behind Galactic HI column?? ...
An Analysis of the Behavior of Vela X-1
... – Flare behavior for 1-10 keV range is consistent with Kreykenbohm’s 20-40 keV data. – Hardness plots for flaring behavior were just the opposite of the Kreykenbohm results!!!! – Result: we have evidence that (1) supports the flare models but (2) is inconsistent with hardness plot results found by t ...
... – Flare behavior for 1-10 keV range is consistent with Kreykenbohm’s 20-40 keV data. – Hardness plots for flaring behavior were just the opposite of the Kreykenbohm results!!!! – Result: we have evidence that (1) supports the flare models but (2) is inconsistent with hardness plot results found by t ...
the article as PDF - Project VS
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
A Star - Cloudy Nights
... Almaak, or Gamma Andromeda is a quadruple star system. The two bright stars you can see are each double stars. They lie approximately 260 light years away. The separation between the brighter stars is about 800 A.U. The fainter star's companion star orbits once every 61 years. The brighter star's ...
... Almaak, or Gamma Andromeda is a quadruple star system. The two bright stars you can see are each double stars. They lie approximately 260 light years away. The separation between the brighter stars is about 800 A.U. The fainter star's companion star orbits once every 61 years. The brighter star's ...
Preview Sample 1
... 27. In the 1840’s, some astronomers noted slight discrepancies in the orbit of Uranus. One suggestion was that the gravity of an unknown planet beyond the orbit of Uranus was affecting the motion of Uranus. What was the predicted average distance of the “new” planet from the Sun? a. 2.8 AU b. 19.6 A ...
... 27. In the 1840’s, some astronomers noted slight discrepancies in the orbit of Uranus. One suggestion was that the gravity of an unknown planet beyond the orbit of Uranus was affecting the motion of Uranus. What was the predicted average distance of the “new” planet from the Sun? a. 2.8 AU b. 19.6 A ...
Lecture 6: Multiple stars
... For an review of observations of multiple systems and the differences between MS and PMS multiples see Duchene & Kraus (2012) and Goodwin et al. (2007) in 'Protostars and Planets V', Goodwin (2010) in Phil.Trans.A, soon Reipurth et al. (2014) in 'Protostars & Planets VI'. The classic papers on MS ...
... For an review of observations of multiple systems and the differences between MS and PMS multiples see Duchene & Kraus (2012) and Goodwin et al. (2007) in 'Protostars and Planets V', Goodwin (2010) in Phil.Trans.A, soon Reipurth et al. (2014) in 'Protostars & Planets VI'. The classic papers on MS ...
Parallax
... System. The Hipparcos satellite has taken these measurements for over 100,000 nearby stars. This provides the basis for all other distance measurements in astronomy, the cosmic distance ladder. Here, the term "parallax" is the angle or semi-angle of inclination between two sightlines to the star. Pa ...
... System. The Hipparcos satellite has taken these measurements for over 100,000 nearby stars. This provides the basis for all other distance measurements in astronomy, the cosmic distance ladder. Here, the term "parallax" is the angle or semi-angle of inclination between two sightlines to the star. Pa ...
Physics of Star Formation: Milky Way and Beyond
... Javier Ballesteros-Paredes - Gravity or Turbulence? On the origin of molecular clouds non-thermal motions The so-called Larson scaling laws found empirically in molecular clouds (MCs) have been generally interpreted as one of the main evidences that the clouds are turbulent, that such turbulence is ...
... Javier Ballesteros-Paredes - Gravity or Turbulence? On the origin of molecular clouds non-thermal motions The so-called Larson scaling laws found empirically in molecular clouds (MCs) have been generally interpreted as one of the main evidences that the clouds are turbulent, that such turbulence is ...
A new low proper motion catalogue of bright M
... dwarfs are the most numerous type of stars in the Galaxy, because of their colour and low luminosity they often can be confused for reddened stars or distant red giants. Because of this their identification in large surveys has been difficult. With exoplanet research now moving from the time of disc ...
... dwarfs are the most numerous type of stars in the Galaxy, because of their colour and low luminosity they often can be confused for reddened stars or distant red giants. Because of this their identification in large surveys has been difficult. With exoplanet research now moving from the time of disc ...