Luminous Blue Variables are Antisocial: Their Isolation Implies that
... and the Large and Small Magellanic Clouds (LMC/SMC), and a similar number resides in other Local Group galaxies (Humphreys & Davidson 1994; van Genderen 2001; Smith et al. 2004; Clark et al. 2005). Stars that spectroscopically resemble LBVs with similar luminosity and color, but which have not (as y ...
... and the Large and Small Magellanic Clouds (LMC/SMC), and a similar number resides in other Local Group galaxies (Humphreys & Davidson 1994; van Genderen 2001; Smith et al. 2004; Clark et al. 2005). Stars that spectroscopically resemble LBVs with similar luminosity and color, but which have not (as y ...
Pale Orange Dots: The Impact of Organic Haze on the Habitability
... gaseous absorption features at wavelengths < 2.5 µm 2-10σ shallower compared to a haze-free planet, and methane and carbon dioxide are detectable at >5σ. A haze absorption feature can be detected at 5σ near 6.3 µm, but higher signal-to-noise is needed to distinguish haze from adjacent absorbers. For ...
... gaseous absorption features at wavelengths < 2.5 µm 2-10σ shallower compared to a haze-free planet, and methane and carbon dioxide are detectable at >5σ. A haze absorption feature can be detected at 5σ near 6.3 µm, but higher signal-to-noise is needed to distinguish haze from adjacent absorbers. For ...
Chapter 5. Mouse and Tackball
... elements of the detector (as shown in Figure 0-9) and each will generate a current that is proportional to the amount of light striking it. These currents are usually very low, on the order of 50 to 100 nanoamperes, and must be amplified and converted to voltages before they can be easily interprete ...
... elements of the detector (as shown in Figure 0-9) and each will generate a current that is proportional to the amount of light striking it. These currents are usually very low, on the order of 50 to 100 nanoamperes, and must be amplified and converted to voltages before they can be easily interprete ...
Inverse Square Law
... From everyday experience, it is obvious that light sources appear to become brighter as you move closer to them. The apparent brightness of the source is related to its distance. However, moving a light source twice as close to you does not make it twice as bright. In this lab, we will examine this ...
... From everyday experience, it is obvious that light sources appear to become brighter as you move closer to them. The apparent brightness of the source is related to its distance. However, moving a light source twice as close to you does not make it twice as bright. In this lab, we will examine this ...
The presence of gamma rays in space was known before they were
... theorised that gamma rays are produced in space. The first actual gamma rays detected from space were detected by sensors mounted on a high altitude balloon by the scientists Peterson and Winckler in 1958. This was in the same year the first few satellites to have gamma ray detectors were launched. ...
... theorised that gamma rays are produced in space. The first actual gamma rays detected from space were detected by sensors mounted on a high altitude balloon by the scientists Peterson and Winckler in 1958. This was in the same year the first few satellites to have gamma ray detectors were launched. ...
Frontiers in Neutrino Astrophysics
... “If [there are no new forces] -- one can conclude that there is no practically possible way of observing the neutrino.” Bethe and Peierls, Nature (1934) “Only neutrinos, with their extremely small interaction cross sections, can enable us to see into the interior of a star...” ...
... “If [there are no new forces] -- one can conclude that there is no practically possible way of observing the neutrino.” Bethe and Peierls, Nature (1934) “Only neutrinos, with their extremely small interaction cross sections, can enable us to see into the interior of a star...” ...
DEPOLARIZATION OF RADIO BURSTS DUE TO REFLECTION OFF
... Depolarization of solar radio bursts requires reflection off boundary layers no thicker than about a wavelength (a few meters at most) between regions with large density ratios. The implied inhomogeneities suggest that the corona is much more highly and sharply structured than can be resolved from o ...
... Depolarization of solar radio bursts requires reflection off boundary layers no thicker than about a wavelength (a few meters at most) between regions with large density ratios. The implied inhomogeneities suggest that the corona is much more highly and sharply structured than can be resolved from o ...
- Philsci
... typical of fictions; but I do not argue for this ‘typicality’ inductively on the basis of the case studies. An inductive argument for either of these conclusions (the inferential function of fictions, and their typicality) would of course require a much larger inductive basis. Although I believe it ...
... typical of fictions; but I do not argue for this ‘typicality’ inductively on the basis of the case studies. An inductive argument for either of these conclusions (the inferential function of fictions, and their typicality) would of course require a much larger inductive basis. Although I believe it ...
View
... fully mastered your telescope’s operation. The LCM hand control has built-in instructions to guide you through all the alignment procedures needed to have the telescope up and running in minutes. Use this manual in conjunction with the on-screen instructions provided by the hand control. The manual ...
... fully mastered your telescope’s operation. The LCM hand control has built-in instructions to guide you through all the alignment procedures needed to have the telescope up and running in minutes. Use this manual in conjunction with the on-screen instructions provided by the hand control. The manual ...
JET FORMATION FROM MASSIVE YOUNG STARS
... jets (e.g., Komissarov et al. 2007; Porth & Fendt 2010). The formation of the jets around young, still forming highmass stars takes place in the deeply embedded cold dust and gas cocoons exhibiting large visual extinction of the order of 100–1000 mag (Arce et al. 2007). Recent progress in observatio ...
... jets (e.g., Komissarov et al. 2007; Porth & Fendt 2010). The formation of the jets around young, still forming highmass stars takes place in the deeply embedded cold dust and gas cocoons exhibiting large visual extinction of the order of 100–1000 mag (Arce et al. 2007). Recent progress in observatio ...
Exemption Renewal Request Form
... wavelengths that are not required for inducing fluorescence and filters are also used to remove the input excitation light from the output fluorescent light. Examples of tests carried out with fluorescent dyes shows the small differences in wavelengths that need to be separated, for example, an oran ...
... wavelengths that are not required for inducing fluorescence and filters are also used to remove the input excitation light from the output fluorescent light. Examples of tests carried out with fluorescent dyes shows the small differences in wavelengths that need to be separated, for example, an oran ...
GLAST Science at Lunch - Aug 11, 2005
... The binary system LS 5039, at a distance of about 3 kpc, was discovered by Motch et al. 1997, crosscorrelating X-ray sources from the ROSAT catalog with OB star catalogues in order to locate systems made of a compact X-ray source orbiting a massive star. Using the VLA radio interferometer, Marti et ...
... The binary system LS 5039, at a distance of about 3 kpc, was discovered by Motch et al. 1997, crosscorrelating X-ray sources from the ROSAT catalog with OB star catalogues in order to locate systems made of a compact X-ray source orbiting a massive star. Using the VLA radio interferometer, Marti et ...
Link - Max-Planck-Institut für Astronomie
... FUors but have never been seen to erupt are instead classified as FUor-like objects (in analogy with nova-like objects, see Reipurth et al., 2002). Many FUor candidates are significantly more extinguished, with redder/cooler spectral energy distributions (SEDs) than classical FUors, which exhibit re ...
... FUors but have never been seen to erupt are instead classified as FUor-like objects (in analogy with nova-like objects, see Reipurth et al., 2002). Many FUor candidates are significantly more extinguished, with redder/cooler spectral energy distributions (SEDs) than classical FUors, which exhibit re ...
Catch a Comet - Innovative Teachers BG
... They are formed by strongly rarefied substance. Their composition is varied - gases or small motes, or mixture of both. During the study of the comet 81P/Wild by the spacecraft Stardus, became clear that composition of the motes is similar to material of asteroid from the Solar system. It is said, ...
... They are formed by strongly rarefied substance. Their composition is varied - gases or small motes, or mixture of both. During the study of the comet 81P/Wild by the spacecraft Stardus, became clear that composition of the motes is similar to material of asteroid from the Solar system. It is said, ...
May 8 Matter & Chemistry
... Correct answer: C. Remember, the key to this question is what they are asking. In this case “How far” or distance. Distance = speed x time. The time is 30 minutes Which must be converted into hours. 60 minutes = 1 hour, so 30 minutes = .5 hours. ...
... Correct answer: C. Remember, the key to this question is what they are asking. In this case “How far” or distance. Distance = speed x time. The time is 30 minutes Which must be converted into hours. 60 minutes = 1 hour, so 30 minutes = .5 hours. ...
Achromatic correction of diffractive dispersion in white light SLM
... function t ∝ exp[iΦ(r⊥ , λ0 )], where r⊥ determines the position on an active surface of the SLM and λ0 is the chosen design wavelength. The phase map addressed on the SLM is controlled by the spatial variations of the refractive index n achieved by the applied voltage. The refractive index is adjus ...
... function t ∝ exp[iΦ(r⊥ , λ0 )], where r⊥ determines the position on an active surface of the SLM and λ0 is the chosen design wavelength. The phase map addressed on the SLM is controlled by the spatial variations of the refractive index n achieved by the applied voltage. The refractive index is adjus ...
"How does Optical-IR interferometry works?" ()
... Types of observations with Optical-IR interferometry • Modellable sources: visibility from two or more telescopes (stellar diameters, binary orbits, circumstellar envelopes and disks – MIDI_&_AMBER@VLTI) • Image reconstruction: aperture synthesis from high (u,v) coverage (sources morphology – LINC_ ...
... Types of observations with Optical-IR interferometry • Modellable sources: visibility from two or more telescopes (stellar diameters, binary orbits, circumstellar envelopes and disks – MIDI_&_AMBER@VLTI) • Image reconstruction: aperture synthesis from high (u,v) coverage (sources morphology – LINC_ ...
Development of Lightning Simulator
... of two lightning images to the CIE1931 xy-chromaticity diagram, the points distribute mainly in the ±0.02∆uv lines. This suggests that the color of lightning can be define by the CCT. Thus, we designed the lightning simulator which is adaptable the color based on the CCT, since the CCT can define th ...
... of two lightning images to the CIE1931 xy-chromaticity diagram, the points distribute mainly in the ±0.02∆uv lines. This suggests that the color of lightning can be define by the CCT. Thus, we designed the lightning simulator which is adaptable the color based on the CCT, since the CCT can define th ...
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... called ‘‘finger diagrams’’). Such diagrams show the ranges of frequency modes as a function of wave vectors where the propagation constant is either real (propagation allowed—Bloch bands) or imaginary (propagation forbidden—band gaps). Within the gaps, frequency modes cannot exist but light can be l ...
... called ‘‘finger diagrams’’). Such diagrams show the ranges of frequency modes as a function of wave vectors where the propagation constant is either real (propagation allowed—Bloch bands) or imaginary (propagation forbidden—band gaps). Within the gaps, frequency modes cannot exist but light can be l ...
Discovery of the host galaxy of HDF850. 1, the brightest sub
... three-colour image of the HDF, is not only consistent with the mm/sub-mm position of HDF850.1, but is statistically rather unlikely to lie so close to the sub-mm/mm source by chance (p ≃ 0.05, because 3-586.0 is relatively bright). However, both Hughes et al. and Downes et al. rejected the possibili ...
... three-colour image of the HDF, is not only consistent with the mm/sub-mm position of HDF850.1, but is statistically rather unlikely to lie so close to the sub-mm/mm source by chance (p ≃ 0.05, because 3-586.0 is relatively bright). However, both Hughes et al. and Downes et al. rejected the possibili ...
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.