"Contrast Enhancement in Light Microscopy". In: Current Protocols in
... the objective itself causes the smallest image point to expand into what is known as an Airy disk (Fig. 2.1.2), whose diameter, D (in µml), will be: ...
... the objective itself causes the smallest image point to expand into what is known as an Airy disk (Fig. 2.1.2), whose diameter, D (in µml), will be: ...
ChromatiC dispersion
... In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. Media having such a property are termed dispersive media. The most familiar example of dispersion is probably a rainbow, in which dispersion causes the spatial separation of a white light into com ...
... In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency. Media having such a property are termed dispersive media. The most familiar example of dispersion is probably a rainbow, in which dispersion causes the spatial separation of a white light into com ...
Link
... earlier type stars trace sites of star birth younger than 40 Myr. OB associations whose most massive members have later spectral types can identify locales where stars formed more than 40 Myr ago. The mass spectra, locations, velocities, and ages of young stars and the properties of gas in nearby as ...
... earlier type stars trace sites of star birth younger than 40 Myr. OB associations whose most massive members have later spectral types can identify locales where stars formed more than 40 Myr ago. The mass spectra, locations, velocities, and ages of young stars and the properties of gas in nearby as ...
Instrumentation for CCAT
... eries of four reflectors couples each receiver al plane, so we denote our optical system -Object Spectrometer” or Mirror MOS ors are connected by pivoting arms, which on to be completely covered, as shown in ...
... eries of four reflectors couples each receiver al plane, so we denote our optical system -Object Spectrometer” or Mirror MOS ors are connected by pivoting arms, which on to be completely covered, as shown in ...
Ovid: Jet-like features near the nucleus of Chiron.
... active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 micrometer. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, t ...
... active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 micrometer. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, t ...
University of Groningen Late-type spiral galaxies Ganda, Katia
... Spiral galaxies towards the end of the Hubble sequence are, on the other hand, still poorlystudied objects, due to the difficulty of obtaining reliable measurements in these low-surface brightness objects, full of dust and star forming regions, whose spectra can be dramatically contaminated by emiss ...
... Spiral galaxies towards the end of the Hubble sequence are, on the other hand, still poorlystudied objects, due to the difficulty of obtaining reliable measurements in these low-surface brightness objects, full of dust and star forming regions, whose spectra can be dramatically contaminated by emiss ...
Natural and man-made terrestrial electromagnetic noise
... magnetic bay type variations at very low frequency (<1 mHz); all this can be considered a sort of «natural magnetic» noise. Variation amplitudes can be quantified in tenths of nT for the diurnal variation and hundreds, or exceptionally, thousands of nT in the case of strong magnetic storms (see Kive ...
... magnetic bay type variations at very low frequency (<1 mHz); all this can be considered a sort of «natural magnetic» noise. Variation amplitudes can be quantified in tenths of nT for the diurnal variation and hundreds, or exceptionally, thousands of nT in the case of strong magnetic storms (see Kive ...
Protoplanetary Discs
... Indirect evidence for circumstellar gas + dust discs Despite historical predictions... Discs are a relatively young field of astronomy What caused discs to be - finally - detected? 1. The invention of infrared detectors ⇒ Infrared measurements revealed circumstellar matter in “spectral enegery dist ...
... Indirect evidence for circumstellar gas + dust discs Despite historical predictions... Discs are a relatively young field of astronomy What caused discs to be - finally - detected? 1. The invention of infrared detectors ⇒ Infrared measurements revealed circumstellar matter in “spectral enegery dist ...
A terrestrial planet candidate in a temperate orbit around Proxima
... HIP 70890, or simply Proxima) is the Sun’s closest stellar neighbour and one of the best studied low-mass stars. It has an effective temperature of only ∼ 3050 K, a luminosity of ∼0.1 per cent solar, a measured radius of 0.14 R⊙ 2 and a mass of about 12 per cent the mass of the Sun. Although Proxima ...
... HIP 70890, or simply Proxima) is the Sun’s closest stellar neighbour and one of the best studied low-mass stars. It has an effective temperature of only ∼ 3050 K, a luminosity of ∼0.1 per cent solar, a measured radius of 0.14 R⊙ 2 and a mass of about 12 per cent the mass of the Sun. Although Proxima ...
The dark matter crisis: falsification of the current standard model of
... perhaps gas is a galaxy if its Newtonian median twobody relaxation time is longer than the Hubble time, trel > τH ≈ 104 Myr. This definition of a galaxy (Kroupa 1998, 2008; Forbes & Kroupa 2011) naturally accounts for the dynamical process of energy equipartition not playing a role in galaxies over t ...
... perhaps gas is a galaxy if its Newtonian median twobody relaxation time is longer than the Hubble time, trel > τH ≈ 104 Myr. This definition of a galaxy (Kroupa 1998, 2008; Forbes & Kroupa 2011) naturally accounts for the dynamical process of energy equipartition not playing a role in galaxies over t ...
Effective Wavelength Scaling for Optical Antennas
... characteristic lengths L that are directly related to the wavelength of the incoming (or outgoing) radiation, i.e., L const , where const is an antenna-design constant. For example, an ideal half-wave dipole antenna is made of a thin rod of length L 1=2 [15]. However, at optical frequenc ...
... characteristic lengths L that are directly related to the wavelength of the incoming (or outgoing) radiation, i.e., L const , where const is an antenna-design constant. For example, an ideal half-wave dipole antenna is made of a thin rod of length L 1=2 [15]. However, at optical frequenc ...
The evolution of Supernova 1987A probed by Hubble Space
... This is the first known observation of a supernova. Historical descriptions of supernovae are rare, and before the beginning of the 20th century only a few different supernova events have been recorded. Even though supernova explosions are among the most energetic events in the universe the vast dis ...
... This is the first known observation of a supernova. Historical descriptions of supernovae are rare, and before the beginning of the 20th century only a few different supernova events have been recorded. Even though supernova explosions are among the most energetic events in the universe the vast dis ...
Introduction: The 2p x-ray absorption spectrum of NiO
... absorption spectrum of NiO. For such calculation, one needs a description of the ground state of NiO, in particular of the nickel ions therein. One can approximate NiO as a rocksalt structure of Ni2+ and O2-. This yields an ionic ground state for Ni2+ that has eight 3d electrons and no 4s and 4p ele ...
... absorption spectrum of NiO. For such calculation, one needs a description of the ground state of NiO, in particular of the nickel ions therein. One can approximate NiO as a rocksalt structure of Ni2+ and O2-. This yields an ionic ground state for Ni2+ that has eight 3d electrons and no 4s and 4p ele ...
The APEX-CHAMP+ view of the Orion Molecular Cloud 1 core
... et al. 2007), which makes the ONC and OMC-1 the closest regions of recent (few million years old) and ongoing high-mass star formation. In the following, we shall use the term “OMC-1 core” or even just OMC-1 for the roughly 8 × 8 – or 1 pc2 – sized dense molecular cloud region, which is located cl ...
... et al. 2007), which makes the ONC and OMC-1 the closest regions of recent (few million years old) and ongoing high-mass star formation. In the following, we shall use the term “OMC-1 core” or even just OMC-1 for the roughly 8 × 8 – or 1 pc2 – sized dense molecular cloud region, which is located cl ...
Master`s thesis: On the investigation of dark matter haloes
... an object in the atmosphere, but Tycho showed that it had to be situated beyond the Moon and thereby proved that the heavens are not unchanging and eternally the same. In 1577 Tycho observed a comet that he could show had passed through the crystal spheres that the Greeks had postulated existed. Alt ...
... an object in the atmosphere, but Tycho showed that it had to be situated beyond the Moon and thereby proved that the heavens are not unchanging and eternally the same. In 1577 Tycho observed a comet that he could show had passed through the crystal spheres that the Greeks had postulated existed. Alt ...
AAVSO: Epsilon Aurigae
... Will the shape of the light curve in different wavelengths change relative to the 1984-85 eclipse, indicating precession or other physical changes in the inner region of the eclipsing disk? There's a lot left to study in this star, and a lot of time between now and the eclipse to observe. The eclips ...
... Will the shape of the light curve in different wavelengths change relative to the 1984-85 eclipse, indicating precession or other physical changes in the inner region of the eclipsing disk? There's a lot left to study in this star, and a lot of time between now and the eclipse to observe. The eclips ...
Invited speakers
... solar planets display highly elliptical orbits, our models include changes in angular velocity and orbital distance resulting from such elliptical orbits. Current Earth based photometry is limited to a precision of about 100ppm of the parent's stars luminosity due to atmospheric extinction. However, ...
... solar planets display highly elliptical orbits, our models include changes in angular velocity and orbital distance resulting from such elliptical orbits. Current Earth based photometry is limited to a precision of about 100ppm of the parent's stars luminosity due to atmospheric extinction. However, ...
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.