Observational Constraints on the Most Massive White Dwarf
... We have just submitted a paper on the white dwarf cooling sequence in M35 (Williams, Bolte & Koester 2008). Here I show the white dwarf region of the color-magnitude diagram. Confirmed white dwarfs are large symbols (filled circles = DAs, diamond= DB, and the open circle = hot DQ). The small points ...
... We have just submitted a paper on the white dwarf cooling sequence in M35 (Williams, Bolte & Koester 2008). Here I show the white dwarf region of the color-magnitude diagram. Confirmed white dwarfs are large symbols (filled circles = DAs, diamond= DB, and the open circle = hot DQ). The small points ...
The Spectrum Analyzer and The Mode Structure
... Where d is the separation between the mirrors in the Fabry-Perot Cavity. Since d can be varied, the Fabry-Perot interferometer can accommodate different integral half wavelengths at different values of the separation d. When the separation d is increased considerably such that ∆σ is large enough, on ...
... Where d is the separation between the mirrors in the Fabry-Perot Cavity. Since d can be varied, the Fabry-Perot interferometer can accommodate different integral half wavelengths at different values of the separation d. When the separation d is increased considerably such that ∆σ is large enough, on ...
Rainbows with carbon nanotubes
... The Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters near the summit of Mauna Kea in the U.S. state of Hawaii. Both telescopes feature 10 m primary mirrors, currently among the largest astronomical telescopes in use. The combination of an excellent site, l ...
... The Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters near the summit of Mauna Kea in the U.S. state of Hawaii. Both telescopes feature 10 m primary mirrors, currently among the largest astronomical telescopes in use. The combination of an excellent site, l ...
Have You Seen Canopus Tonight?
... The spectrum of Canopus shows it belongs to a class of bright giants with moderate temperatures, or possibly to a group of very bright giants or low luminosity supergiants, all stars in old age. (Its spectral class is variously given as A9 II or F0 Ib-II for those who understand stellar spectral typ ...
... The spectrum of Canopus shows it belongs to a class of bright giants with moderate temperatures, or possibly to a group of very bright giants or low luminosity supergiants, all stars in old age. (Its spectral class is variously given as A9 II or F0 Ib-II for those who understand stellar spectral typ ...
A terrestrial planet candidate in a temperate orbit around
... closest stellar neighbour and one of the best-studied low-mass stars. It has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the Sun, a measured radius of 14 per cent of the radius of the Sun2 and a mass of about 12 per cent of the mass of the Sun. Alth ...
... closest stellar neighbour and one of the best-studied low-mass stars. It has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the Sun, a measured radius of 14 per cent of the radius of the Sun2 and a mass of about 12 per cent of the mass of the Sun. Alth ...
High‐transmission dielectric metasurface with 2π phase control at
... In this work, we provide clear theoretical and experimental proof that close-to-unity resonant transmission can be achieved at visible wavelengths using properly designed high-index (amorphous silicon) metasurfaces (Fig. 1). This effect is realized by almost complete suppression of resonant reflecti ...
... In this work, we provide clear theoretical and experimental proof that close-to-unity resonant transmission can be achieved at visible wavelengths using properly designed high-index (amorphous silicon) metasurfaces (Fig. 1). This effect is realized by almost complete suppression of resonant reflecti ...
unit i: intro to earth science/density
... i. Increasing the pressure on a substance makes it denser, and decreasing the pressure makes it less dense. j. Breaking a pure substance into smaller pieces will not change its density. k. Most substances are most dense as solids. l. Water is most dense as a liquid. At 3.98°C, the density of water i ...
... i. Increasing the pressure on a substance makes it denser, and decreasing the pressure makes it less dense. j. Breaking a pure substance into smaller pieces will not change its density. k. Most substances are most dense as solids. l. Water is most dense as a liquid. At 3.98°C, the density of water i ...
NEWFIRM: the NOAO Extremely Wide Field IR Imager
... Evolution of galaxies and galaxy clustering at 1 < z < 3 Track assembly and spatial clustering of galaxies with a masssensitive probe gravity driven phenomena Compare with hierarchical formation theories Abundance of rich clusters tests CDM variants Need large area for sample size, linear dimensio ...
... Evolution of galaxies and galaxy clustering at 1 < z < 3 Track assembly and spatial clustering of galaxies with a masssensitive probe gravity driven phenomena Compare with hierarchical formation theories Abundance of rich clusters tests CDM variants Need large area for sample size, linear dimensio ...
Mastering the California Science Content Standards, SE
... galaxies and their evolution. As a basis for understanding this concept: a. Students know galaxies are clusters of billions of stars and may have different shapes. b. Students know that the Sun is one of many stars in the Milky Way galaxy and that stars may differ in size, temperature, and color. c. ...
... galaxies and their evolution. As a basis for understanding this concept: a. Students know galaxies are clusters of billions of stars and may have different shapes. b. Students know that the Sun is one of many stars in the Milky Way galaxy and that stars may differ in size, temperature, and color. c. ...
H-alpha Imaging of Early-type (Sa
... High resolution Hα images of nearby galaxies provide important information about the morphology and luminosity of the ionized hydrogen gas. Surprisingly few Hα images of early-type spirals exist in the published literature. The general notion that early-type spirals do not have significant massive s ...
... High resolution Hα images of nearby galaxies provide important information about the morphology and luminosity of the ionized hydrogen gas. Surprisingly few Hα images of early-type spirals exist in the published literature. The general notion that early-type spirals do not have significant massive s ...
7. Paradise Gravity
... inverse-square law to result in the same orbital velocity at all distances from the center of a galaxy. Unlike baryonic matter, which is most concentrated near the center of rotation due to gravitational attraction, dark matter is most concentrated in a halo at some significant distance from the cen ...
... inverse-square law to result in the same orbital velocity at all distances from the center of a galaxy. Unlike baryonic matter, which is most concentrated near the center of rotation due to gravitational attraction, dark matter is most concentrated in a halo at some significant distance from the cen ...
Angular Momentum Evolution of Young Low
... The evolution of rotational distributions from 1 Ma to the old disk population shown in Fig. 1 reveals a number of features: 1. The initial distribution of spin rates at an age of about 2 Ma is quite wide over the whole mass range from 0.2 to 1.0 M⊙, with the bulk of rotational periods ranging from ...
... The evolution of rotational distributions from 1 Ma to the old disk population shown in Fig. 1 reveals a number of features: 1. The initial distribution of spin rates at an age of about 2 Ma is quite wide over the whole mass range from 0.2 to 1.0 M⊙, with the bulk of rotational periods ranging from ...
Measuring amplitude and phase of light emerging from
... The immersion-HRIM provides a sufficient axial resolution to verify the Talbot length of 4.7 μm approximated by Eq. (1). Figures 6(a) and 6(b) show the influence of varying the numerical aperture for the 1-Pm-period grating. Again one finds the enhanced resolution in intensity images and larger curv ...
... The immersion-HRIM provides a sufficient axial resolution to verify the Talbot length of 4.7 μm approximated by Eq. (1). Figures 6(a) and 6(b) show the influence of varying the numerical aperture for the 1-Pm-period grating. Again one finds the enhanced resolution in intensity images and larger curv ...
Fundamental properties of Ana González Galán
... and AX J1845.0-0433. These objects are composed of pulsars (rotating neutron stars) accreting material from the wind of their supergiant companions. The X-rays are produced in the interaction of the accreted material with the strong gravitational field of the neutron star that accelerates this mater ...
... and AX J1845.0-0433. These objects are composed of pulsars (rotating neutron stars) accreting material from the wind of their supergiant companions. The X-rays are produced in the interaction of the accreted material with the strong gravitational field of the neutron star that accelerates this mater ...
A study on the nickel(II)
... square-planar. Simultaneously, two protons were released to form [NiH 22 L]. The involvement of other fam nitrogens in complex formation seemed to be obvious but no detailed analysis of the binding sites for either of the two Ni(II) complexes was presented [1]. In this work, a continuation of our ea ...
... square-planar. Simultaneously, two protons were released to form [NiH 22 L]. The involvement of other fam nitrogens in complex formation seemed to be obvious but no detailed analysis of the binding sites for either of the two Ni(II) complexes was presented [1]. In this work, a continuation of our ea ...
from unt.edu - Department of Chemistry
... the base concept for 1 and 2 is borne out according to the data in Fig. 1. This is similar to the action of aromatic hydrocarbons as bases that can attract cations at the center of and perpendicular to the aromatic ring plane; see the work of Dougherty on cation- interactions [29]. In fact, 1 a ...
... the base concept for 1 and 2 is borne out according to the data in Fig. 1. This is similar to the action of aromatic hydrocarbons as bases that can attract cations at the center of and perpendicular to the aromatic ring plane; see the work of Dougherty on cation- interactions [29]. In fact, 1 a ...
Poisson’s spot with molecules Please share
... The two sets of model calculations shown in Fig. 4 correspond to a disk with 共continuous line兲 and without 共dashed lines兲 edge roughness, revealing its effect on the Poissonspot intensity. At the closest distance considerable dampening may be noted while at the farthest position the difference to an ...
... The two sets of model calculations shown in Fig. 4 correspond to a disk with 共continuous line兲 and without 共dashed lines兲 edge roughness, revealing its effect on the Poissonspot intensity. At the closest distance considerable dampening may be noted while at the farthest position the difference to an ...
Generating Single Photons on Demand I Vladan Vuletic
... (see Figure 2), the grating will wash out and collective emission will not occur. Thus the entangled many-body state has a finite lifetime that depends on the temperature of the atoms and the chosen beam geometry. The single photon must be generated within a certain time after the source has been arm ...
... (see Figure 2), the grating will wash out and collective emission will not occur. Thus the entangled many-body state has a finite lifetime that depends on the temperature of the atoms and the chosen beam geometry. The single photon must be generated within a certain time after the source has been arm ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.