PDF file of document - University of Iowa Astrophysics
... be determined by how well you answer these questions. If you are confused about questions as you progress, ask your lab instructor for assistance. Questions near the end of the project often build on earlier ones, so it is better that you ask now than to be confused later. Each project is designed t ...
... be determined by how well you answer these questions. If you are confused about questions as you progress, ask your lab instructor for assistance. Questions near the end of the project often build on earlier ones, so it is better that you ask now than to be confused later. Each project is designed t ...
Astronomy Astrophysics Detailed abundances of a large sample of giant stars in... and in the Sagittarius nucleus
... for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster (GC) lying in the nucleus of the Sagittarius dwarf galaxy. We also derived detailed abundances for 27 red giants belonging to the Sgr nucleus. Our abundances measure the intrinsic metallicity dispersion (∼0.19 dex, rms scatter) of ...
... for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster (GC) lying in the nucleus of the Sagittarius dwarf galaxy. We also derived detailed abundances for 27 red giants belonging to the Sgr nucleus. Our abundances measure the intrinsic metallicity dispersion (∼0.19 dex, rms scatter) of ...
April 2016 - Central Arkansas Astronomical Society
... publica on in the journal Physical Review Le ers, was made par cular gravita onal wave measurement, Hulse and Taylor by the LIGO Scien fic Collabora on (which includes the GEO were awarded the Nobel Prize in Physics in 1993. Collabora on and the Australian Consor um for The new LIGO discovery is the ...
... publica on in the journal Physical Review Le ers, was made par cular gravita onal wave measurement, Hulse and Taylor by the LIGO Scien fic Collabora on (which includes the GEO were awarded the Nobel Prize in Physics in 1993. Collabora on and the Australian Consor um for The new LIGO discovery is the ...
Comets and the Age of the Solar System
... shoves the ionised gas away from the Sun, forming an almost more, which results in more sublimation and coma straight ion, or gas, tail (Figure 1). The Sun's radiation formation. This suggests that new comets may not reach pushes the more massive dust particles outward, producing full potential brig ...
... shoves the ionised gas away from the Sun, forming an almost more, which results in more sublimation and coma straight ion, or gas, tail (Figure 1). The Sun's radiation formation. This suggests that new comets may not reach pushes the more massive dust particles outward, producing full potential brig ...
Stellar evolution – Part III of III - Inside Mines
... Planetary nebulae Planetary nebulae are often asymmetric, possibly due to: • Stellar rotation • Magnetic fields • Dust disks around the stars Note: the Sun may form a planetary nebula, but uncertain (M☉ too small?) ...
... Planetary nebulae Planetary nebulae are often asymmetric, possibly due to: • Stellar rotation • Magnetic fields • Dust disks around the stars Note: the Sun may form a planetary nebula, but uncertain (M☉ too small?) ...
Migrating Dust Particles
... size they drifted towards the Sun. This material was later accreted to planetesimals which are held together by self-gravity. As the planetesimals extend their gravitational range they have a run-away growth towards becoming planets. In this step the planetesimals grow more the larger they get. This ...
... size they drifted towards the Sun. This material was later accreted to planetesimals which are held together by self-gravity. As the planetesimals extend their gravitational range they have a run-away growth towards becoming planets. In this step the planetesimals grow more the larger they get. This ...
What are Jupiter and its moons like? - Harvard
... your images: How large is Jupiter, compared to Earth? How far from Jupiter is its moon Europa? How long does it take Europa to orbit Jupiter once? The third part of your challenge is to use your measurements, and your knowledge of physics, to calculate: How much would you weigh on Jupiter’s surface, ...
... your images: How large is Jupiter, compared to Earth? How far from Jupiter is its moon Europa? How long does it take Europa to orbit Jupiter once? The third part of your challenge is to use your measurements, and your knowledge of physics, to calculate: How much would you weigh on Jupiter’s surface, ...
Luminosity profiles and sizes of massive star clusters in NGC 7252
... Cluster profiles and sizes in NGC 7252 Observations of young cluster systems have shown that the clusters themselves are often grouped into larger structures, cluster complexes, with radii of tens to hundreds of parsecs (e.g. Zhang, Fall & Whitmore 2001; Larsen 2004). These complexes often appear t ...
... Cluster profiles and sizes in NGC 7252 Observations of young cluster systems have shown that the clusters themselves are often grouped into larger structures, cluster complexes, with radii of tens to hundreds of parsecs (e.g. Zhang, Fall & Whitmore 2001; Larsen 2004). These complexes often appear t ...
PPT
... have supermassive black holes at their centers • These black holes seem to be dormant active ...
... have supermassive black holes at their centers • These black holes seem to be dormant active ...
Astronomy WHS Sow
... With the discovery during the latter half of the 20th century of more objects within the Solar System and large objects around other stars, disputes arose over what should constitute a planet. There was particular disagreement over whether an object should be considered a planet if it was part of a ...
... With the discovery during the latter half of the 20th century of more objects within the Solar System and large objects around other stars, disputes arose over what should constitute a planet. There was particular disagreement over whether an object should be considered a planet if it was part of a ...
Direct Imaging of Exoplanets - American Museum of Natural History
... around nearby stars will be essential, because these systems will have larger apparent sizes and photon fluxes than more distant systems, and will therefore be relatively accessible to the techniques in this chapter. A combination of astrometry and imaging will provide the mass, period, orbit, and s ...
... around nearby stars will be essential, because these systems will have larger apparent sizes and photon fluxes than more distant systems, and will therefore be relatively accessible to the techniques in this chapter. A combination of astrometry and imaging will provide the mass, period, orbit, and s ...
Hubble Space Telescope Imaging of Post
... responsible for the formation of large (i.e., elliptical) galaxies via mergers of smaller (e.g., spiral) systems (Toomre 1977). Ultraluminous infrared galaxies (ULIRGs), interacting systems powered by both starburst and active galactic nuclei (AGN), have been hypothesized to evolve into “normal” (i. ...
... responsible for the formation of large (i.e., elliptical) galaxies via mergers of smaller (e.g., spiral) systems (Toomre 1977). Ultraluminous infrared galaxies (ULIRGs), interacting systems powered by both starburst and active galactic nuclei (AGN), have been hypothesized to evolve into “normal” (i. ...
Jul 2016 - Bays Mountain Park
... July is here and with it, hot and miserable weather. I enjoy the holidays during the summer for the most part, but I cannot stand the hot, humid heat that comes with it. Even if it is clear on one of these nights, it is usually too hot and muggy to go out and observe or image our beautiful night sky ...
... July is here and with it, hot and miserable weather. I enjoy the holidays during the summer for the most part, but I cannot stand the hot, humid heat that comes with it. Even if it is clear on one of these nights, it is usually too hot and muggy to go out and observe or image our beautiful night sky ...
PTYS/ASTR 206
... • Many KBO’s are in orbital resonances with Neptune (3:2 resonance “Plutino”) • This is further complicated by the fact that the recently discovered Eris is larger than Pluto. • In 2006, Pluto was downgraded to a new class of objects called “dwarf planets” – But the debate rages on ...
... • Many KBO’s are in orbital resonances with Neptune (3:2 resonance “Plutino”) • This is further complicated by the fact that the recently discovered Eris is larger than Pluto. • In 2006, Pluto was downgraded to a new class of objects called “dwarf planets” – But the debate rages on ...
The cosmological significance of high
... investigations of its stellar content. The H I mass of the cloud is 2.0 × 107 (d/27 kpc)2 M⊙ , making Complex H one of the most massive HVCs if its distance is more than ∼ 20 kpc. Virtually all similar H I clouds in other galaxy groups are associated with low surface brightness dwarf galaxies. We se ...
... investigations of its stellar content. The H I mass of the cloud is 2.0 × 107 (d/27 kpc)2 M⊙ , making Complex H one of the most massive HVCs if its distance is more than ∼ 20 kpc. Virtually all similar H I clouds in other galaxy groups are associated with low surface brightness dwarf galaxies. We se ...
Conference Abstract Booklet here.
... We analyse the multiwavelength theoretical (UBVRIJKL) and observed (VIJHK3.6/4.5) light curves of Cepheid variables using the Fourier decomposition and principal component analysis methods. The theoretical Cepheid light curves are obtained using the full amplitude, nonlinear, convective hydrodynamic ...
... We analyse the multiwavelength theoretical (UBVRIJKL) and observed (VIJHK3.6/4.5) light curves of Cepheid variables using the Fourier decomposition and principal component analysis methods. The theoretical Cepheid light curves are obtained using the full amplitude, nonlinear, convective hydrodynamic ...
Project Description - SDSS-III
... Universe imprint a characteristic scale on the clustering of dark matter, galaxies, and intergalactic gas. By measuring this scale with tracers seen at different redshifts, we can create a “Hubble diagram” of unprecedented precision covering most of cosmic history and can thereby pin down the prope ...
... Universe imprint a characteristic scale on the clustering of dark matter, galaxies, and intergalactic gas. By measuring this scale with tracers seen at different redshifts, we can create a “Hubble diagram” of unprecedented precision covering most of cosmic history and can thereby pin down the prope ...
Planet Formation: Disk Formation and Evolution
... There is an inner ring of small rocky bodies, i.e. the asteroid belt (which has a chemical gradient) and an outer belt of icy bodies, i.e. the Kuiper belt. In the centre of the Solar System is the hot Sun. There are clearly more refractory materials close to the Sun and more volatiles farther away. ...
... There is an inner ring of small rocky bodies, i.e. the asteroid belt (which has a chemical gradient) and an outer belt of icy bodies, i.e. the Kuiper belt. In the centre of the Solar System is the hot Sun. There are clearly more refractory materials close to the Sun and more volatiles farther away. ...
Element Segregation in Low Metallicity Stars and the Primordial
... the pre-main sequence phase, the stars are convectively mixed, which forces homogeneity. When they become radiative, the elements begin to migrate from the initial stage towards a never-reached equilibrium stage. This process creates an element segregation in stable stars. As a result, the abundance ...
... the pre-main sequence phase, the stars are convectively mixed, which forces homogeneity. When they become radiative, the elements begin to migrate from the initial stage towards a never-reached equilibrium stage. This process creates an element segregation in stable stars. As a result, the abundance ...
The Chemical Composition of Carbon-Rich, Very Metal
... Many observational and theoretical studies have been undertaken to clarify the formation and chemical evolution of the Galaxy, as well as the nature of stellar evolution at the earliest times. For this purpose, extensive surveys of metal-deficient stars have been carried out (e.g., the HK survey of ...
... Many observational and theoretical studies have been undertaken to clarify the formation and chemical evolution of the Galaxy, as well as the nature of stellar evolution at the earliest times. For this purpose, extensive surveys of metal-deficient stars have been carried out (e.g., the HK survey of ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.