Classification of extremely red objects in the Hubble Ultra Deep Field
... distribution is at zphot ∼ 1.0; all of them have z phot > 0.8. Only 3 EROs have redshifts z phot > 2.0; those are faint dusty EROs. The small panels in Figure 4 show the redshift distribution of OGs (in Panel a) and DGs (in Panel b). It is worth noting that OGs have a narrow redshift distribution; n ...
... distribution is at zphot ∼ 1.0; all of them have z phot > 0.8. Only 3 EROs have redshifts z phot > 2.0; those are faint dusty EROs. The small panels in Figure 4 show the redshift distribution of OGs (in Panel a) and DGs (in Panel b). It is worth noting that OGs have a narrow redshift distribution; n ...
Constraining the Contribution of Galaxies and Active Galactic Nuclei
... for Thomson scattering from Planck, we find that αhz > −1.5 and fesc < 0.15 should be satisfied. Our result suggests that an AGN-dominated model with AGN abundance as large as the estimation of recent observation by Giallongo et al. is allowed only if the contribution from high-z galaxies is almost ...
... for Thomson scattering from Planck, we find that αhz > −1.5 and fesc < 0.15 should be satisfied. Our result suggests that an AGN-dominated model with AGN abundance as large as the estimation of recent observation by Giallongo et al. is allowed only if the contribution from high-z galaxies is almost ...
Do high-velocity clouds trace the dark matter subhalo population?⋆
... Context. Within the cosmological concordance model, cold dark matter (CDM) subhalos form the building blocks that merge hierarchically into more massive galaxies. This concept requires that massive galaxies are even nowadays surrounded by numerous subhalos. Since intergalactic gas is accreted by mas ...
... Context. Within the cosmological concordance model, cold dark matter (CDM) subhalos form the building blocks that merge hierarchically into more massive galaxies. This concept requires that massive galaxies are even nowadays surrounded by numerous subhalos. Since intergalactic gas is accreted by mas ...
Foretellings of Ragnar\" ok: World-engulfing Asymptotic Giants and
... arise for Ψ as small as 0.02, this causing eccentricity variations of order 0.1 if maintained for several thousands of years. For our stellar models, taking a planet at 5 AU, the maximum Ψ is 3 × 10−3 , attained only briefly, so we expect that the adiabatic approximation will hold. We neglect any dr ...
... arise for Ψ as small as 0.02, this causing eccentricity variations of order 0.1 if maintained for several thousands of years. For our stellar models, taking a planet at 5 AU, the maximum Ψ is 3 × 10−3 , attained only briefly, so we expect that the adiabatic approximation will hold. We neglect any dr ...
Atoms are the building blocks of most matter.
... • Atoms also stick to each other when ions of opposite charge are formed formed, and these ions are held together by simple electric forces (an ionic bond). ...
... • Atoms also stick to each other when ions of opposite charge are formed formed, and these ions are held together by simple electric forces (an ionic bond). ...
Ca(ii), Cd(ii), Cu(ii) and Pb(ii)
... Electrospray ionization mass spectrometry (ESI-MS)1–4 is currently an effective tool for analysis of a wide variety of noncovalent complexes,5–16 such as those formed in host–guest chemistry. Many studies show that equilibrium distribution of complexes in solution is reflected in the intensities of ...
... Electrospray ionization mass spectrometry (ESI-MS)1–4 is currently an effective tool for analysis of a wide variety of noncovalent complexes,5–16 such as those formed in host–guest chemistry. Many studies show that equilibrium distribution of complexes in solution is reflected in the intensities of ...
Laser cooling and trapping of atoms
... laser cooling. One of the characteristics of optical control of atomic motion is that the speed of atoms can be considerably reduced. Since the spread of velocities of a sample of atoms is directly related to its temperature, the field has been dubbed laser cooling, and this name has persisted throug ...
... laser cooling. One of the characteristics of optical control of atomic motion is that the speed of atoms can be considerably reduced. Since the spread of velocities of a sample of atoms is directly related to its temperature, the field has been dubbed laser cooling, and this name has persisted throug ...
Early structure formation from cosmic string loops Abstract
... requires the baryons to collapse to sufficient density, which can only happen due to dissipation. When the neutral hydrogen atoms have large enough virial velocity, collisions will have sufficient center-of-mass energy to excite their electrons and radiate. The energy escaping with the radiated phot ...
... requires the baryons to collapse to sufficient density, which can only happen due to dissipation. When the neutral hydrogen atoms have large enough virial velocity, collisions will have sufficient center-of-mass energy to excite their electrons and radiate. The energy escaping with the radiated phot ...
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... To investigate the effects of cascading, we conducted numerical simulations using coupled equations of propagation of the pump and THz fields. Simulations were performed based on one-dimensional propagation equations using parameters of a ZnTe crystal pumped by 800 nm femtosecond optical pulses. The ...
... To investigate the effects of cascading, we conducted numerical simulations using coupled equations of propagation of the pump and THz fields. Simulations were performed based on one-dimensional propagation equations using parameters of a ZnTe crystal pumped by 800 nm femtosecond optical pulses. The ...
Enpolarization and depolarization of light
... analyzed at the speckle size [10, 11]. In particular recent papers have revealed unexpected enpolarization effects [12–14] in light scattered by complex media. Such enpolarization effects were predicted and compared to experiment with great accuracy [12]. Furthermore, numerical and analytical calcul ...
... analyzed at the speckle size [10, 11]. In particular recent papers have revealed unexpected enpolarization effects [12–14] in light scattered by complex media. Such enpolarization effects were predicted and compared to experiment with great accuracy [12]. Furthermore, numerical and analytical calcul ...
Frequency domain optical parametric amplification - few
... amplified in the time domain, we propose to amplify their corresponding spectral parts independent of each other in a frequency domain optical parametric amplifier (FOPA). In this manner, simultaneous upscaling of pulse energy and amplified bandwidth becomes possible. This single device paves the way f ...
... amplified in the time domain, we propose to amplify their corresponding spectral parts independent of each other in a frequency domain optical parametric amplifier (FOPA). In this manner, simultaneous upscaling of pulse energy and amplified bandwidth becomes possible. This single device paves the way f ...
Magic-angle Spinning Nuclear Magnetic Resonance Studies of
... Bronsted-acid sites exchanging rapidly with protons of the water molecules adsorbed on these sites. In our first attempt to study the acidic properties of aluminosilicates by 'H MAS NMR at a low field6 we assigned the line at 7 ppm to bridging hydroxyl groups. This interpretation was revised by the ...
... Bronsted-acid sites exchanging rapidly with protons of the water molecules adsorbed on these sites. In our first attempt to study the acidic properties of aluminosilicates by 'H MAS NMR at a low field6 we assigned the line at 7 ppm to bridging hydroxyl groups. This interpretation was revised by the ...
Gravitational Bending of Light and Its Measurement with
... The SKA will be an interferometric array of individual antenna stations, synthesizing an aperture with diameter of up to several 1000 kilometers. The SKA is a new generation radio telescope that will be 100 times as sensitive as the best present-day instruments. It will unlock information from the v ...
... The SKA will be an interferometric array of individual antenna stations, synthesizing an aperture with diameter of up to several 1000 kilometers. The SKA is a new generation radio telescope that will be 100 times as sensitive as the best present-day instruments. It will unlock information from the v ...
Axisymmetry in protoplanetary nebulae: using imaging polarimetry
... shell of gas and dust which has a flattened density distribution, being more equatorially concentrated, which can then collimate any further outflow along the polar axis. Until recently, however, resolved images of CSEs existed for only a few large, bipolar PPNe, compared with a list of PPNe candida ...
... shell of gas and dust which has a flattened density distribution, being more equatorially concentrated, which can then collimate any further outflow along the polar axis. Until recently, however, resolved images of CSEs existed for only a few large, bipolar PPNe, compared with a list of PPNe candida ...
how dry is the brown dwarf desert? quantifying the
... In Figure 1, 80 (= 464–384), or 17%, of Hipparcos Sun-like stellar systems are not present in any of the Doppler target lists. The triangles in Figure 1 indicate that the ones left out are spread more or less evenly in B V space spanned by the gray parallelogram. Similarly in Figure 2, 1295 (= 329 ...
... In Figure 1, 80 (= 464–384), or 17%, of Hipparcos Sun-like stellar systems are not present in any of the Doppler target lists. The triangles in Figure 1 indicate that the ones left out are spread more or less evenly in B V space spanned by the gray parallelogram. Similarly in Figure 2, 1295 (= 329 ...
Observed emission rates in sprite streamer heads
... which is controlled externally by the user. The calibration constant C can then be determined through analysis of the star field. C reflects optical and electronic gains, which we assume to be wavelength independent. [13] The star spectra P(l) were derived from the ‘‘Thirteen-Color Photometry of 138 ...
... which is controlled externally by the user. The calibration constant C can then be determined through analysis of the star field. C reflects optical and electronic gains, which we assume to be wavelength independent. [13] The star spectra P(l) were derived from the ‘‘Thirteen-Color Photometry of 138 ...
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.