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... just prior to the explosion. After core collapse, the optical luminosity of the supernova is powered by radioactive decay of nickel-56 and its daughter element cobalt-56. Meanwhile, in the less dense outer layers of the supernova remnant, the rare titanium-44, apparently an exclusive product of type ...
... just prior to the explosion. After core collapse, the optical luminosity of the supernova is powered by radioactive decay of nickel-56 and its daughter element cobalt-56. Meanwhile, in the less dense outer layers of the supernova remnant, the rare titanium-44, apparently an exclusive product of type ...
Solutions to the 1 st Astronomy Exam
... northern region of the sky, and is called the Arctic Pole; the other is always hidden beneath the earth to the south and is called the Antarctic Pole.” Why did Aristotle not mention that Polaris is a fairly bright star located near the Arctic Pole? Answer in a couple of sentences. Aristotle did not ...
... northern region of the sky, and is called the Arctic Pole; the other is always hidden beneath the earth to the south and is called the Antarctic Pole.” Why did Aristotle not mention that Polaris is a fairly bright star located near the Arctic Pole? Answer in a couple of sentences. Aristotle did not ...
The UV properties of E+ A galaxies: constraints on feedback
... star formation. Similarly, Goto (2004) performed VLA 20 cm radio-continuum observations of 36 E+A galaxies drawn from the SDSS and found that none of these galaxies were detected in the radio wavelengths. These results are supported by Galaz (2000) who do not find compelling evidence for strong inte ...
... star formation. Similarly, Goto (2004) performed VLA 20 cm radio-continuum observations of 36 E+A galaxies drawn from the SDSS and found that none of these galaxies were detected in the radio wavelengths. These results are supported by Galaz (2000) who do not find compelling evidence for strong inte ...
kokhan1
... Turbid bio-liquids and other light scattering chiral media can be characterized by their ORD and CD spectra. It was shown here how to relate ORD and CD spectra of disperse media with intrinsic spectra of particles using simple approximate equations. This could be of importance for monitoring biopart ...
... Turbid bio-liquids and other light scattering chiral media can be characterized by their ORD and CD spectra. It was shown here how to relate ORD and CD spectra of disperse media with intrinsic spectra of particles using simple approximate equations. This could be of importance for monitoring biopart ...
Collective molecular rotation in water and other simple liquids
... both TO and LO modes contribute for CCl 4 and methanol and that I HV rI VH s 1 is observed because the two contributions cancel. Although the 10–20% deviations observed for the spectrally averaged polarization ratios are not very dramatic, much larger effects are expected for spectrally resolved mea ...
... both TO and LO modes contribute for CCl 4 and methanol and that I HV rI VH s 1 is observed because the two contributions cancel. Although the 10–20% deviations observed for the spectrally averaged polarization ratios are not very dramatic, much larger effects are expected for spectrally resolved mea ...
Chapter 3 (Lectures 7
... showing such emission, if they are found in association with other very young stars, and are in regions still full of interstellar material left from star formation, are known as “Herbig AeBe stars”. The cause of the Herbig AeBe phenomenon is still not clearly understood. In extreme cases the lumino ...
... showing such emission, if they are found in association with other very young stars, and are in regions still full of interstellar material left from star formation, are known as “Herbig AeBe stars”. The cause of the Herbig AeBe phenomenon is still not clearly understood. In extreme cases the lumino ...
the optical colors of giant elliptical galaxies and their metal
... the sense that the parent galaxies are redder by ∼ 0.12 – 0.20 mag at a given galactocentric distance. However, spectroscopic indices in the blue indicate that the luminosity-weighted ages and metallicities of such galaxies are equal to that of their averaged massive metal-rich GCs at a given galact ...
... the sense that the parent galaxies are redder by ∼ 0.12 – 0.20 mag at a given galactocentric distance. However, spectroscopic indices in the blue indicate that the luminosity-weighted ages and metallicities of such galaxies are equal to that of their averaged massive metal-rich GCs at a given galact ...
Cooling neutron star in the Cassiopeia A supernova remnant
... • Cas A NS and other isolated neutron stars ...
... • Cas A NS and other isolated neutron stars ...
Black Holes in Binary Systems and Galaxy Nuclei
... Up to now from the borders of many special Xray space observatories (Einstein, Rosat, XMM Newton, Integral etc.) several thousands of Xray binaries have been discovered. Optical investigations made by many scientific groups (USA, England, Germany, Russia etc.) allowed to estimate the masses of 26 st ...
... Up to now from the borders of many special Xray space observatories (Einstein, Rosat, XMM Newton, Integral etc.) several thousands of Xray binaries have been discovered. Optical investigations made by many scientific groups (USA, England, Germany, Russia etc.) allowed to estimate the masses of 26 st ...
Production of Linearly Polarized Brewster`s Law
... index of the surrounding medium. It follows from equation (2) and equation (3) that ...
... index of the surrounding medium. It follows from equation (2) and equation (3) that ...
Increasing the blue-shift of a supercontinuum by
... to be concentrated in a specific spectral region where other lasers are not readily available. To achieve spectral energy at wavelengths longer than provided by a given pump laser, one can use the soliton self-frequency shift to simply red-shift the laser pulse over a desired wavelength range. This ...
... to be concentrated in a specific spectral region where other lasers are not readily available. To achieve spectral energy at wavelengths longer than provided by a given pump laser, one can use the soliton self-frequency shift to simply red-shift the laser pulse over a desired wavelength range. This ...
The Halo of the Milky Way
... Galactic spheroid population awaits position information and three dimensional space velocities for a representative set of stars in every substructure. Tangential velocities for many stars will be provided by current and planned astrometry missions, but no planned mission will measure stars faint e ...
... Galactic spheroid population awaits position information and three dimensional space velocities for a representative set of stars in every substructure. Tangential velocities for many stars will be provided by current and planned astrometry missions, but no planned mission will measure stars faint e ...
Higher Physics Resource Guide
... The following pages show the mandatory course key areas table from the SQA Higher Physics Course and Unit Support Notes. An additional fourth column has been included which contains hyperlinks to useful resources. Please note: Staff are not required to use the resources listed – they are only includ ...
... The following pages show the mandatory course key areas table from the SQA Higher Physics Course and Unit Support Notes. An additional fourth column has been included which contains hyperlinks to useful resources. Please note: Staff are not required to use the resources listed – they are only includ ...
1.1 Objectives
... in isotropic medium [8]. Light filaments propagating in noble gases generate intense pulses as short as few optical cycles (<5 fs duration), which have a potential for generation of high order harmonics seeking for atosecond pulses in VUV and X-ray spectral range [9]. Intensive research of plasma c ...
... in isotropic medium [8]. Light filaments propagating in noble gases generate intense pulses as short as few optical cycles (<5 fs duration), which have a potential for generation of high order harmonics seeking for atosecond pulses in VUV and X-ray spectral range [9]. Intensive research of plasma c ...
On Sunspot and Starspot Lifetimes - Patrick M. Hartigan
... (2003a,b) who used a Fourier transform method to study the differential rotation of a sample of rapidly rotating F0 - G0 dwarf stars and found that it is strongest in slower rotators. Moreover, the differential rotation of the more rapidly-rotating stars in their sample fell below their method’s thr ...
... (2003a,b) who used a Fourier transform method to study the differential rotation of a sample of rapidly rotating F0 - G0 dwarf stars and found that it is strongest in slower rotators. Moreover, the differential rotation of the more rapidly-rotating stars in their sample fell below their method’s thr ...
Whispering-gallery-mode microdisk lasers
... also exhibits significant lasing actions characteristic of an abrupt increase of light output and the significant narrowing of the spectral lines when the threshold is approached. This work shows that the laser micronanofabrication technology is not only applicable to passive micro-optical component ...
... also exhibits significant lasing actions characteristic of an abrupt increase of light output and the significant narrowing of the spectral lines when the threshold is approached. This work shows that the laser micronanofabrication technology is not only applicable to passive micro-optical component ...
PRESENT-DAY CLUSTER FORMATION
... stars is necessarily a far more complex process, and is less amenable to theoretical analysis. Therefore, at present, an understanding of how star clusters form must come largely from observations. The formation of globular clusters cannot yet be observed directly, but the circumstances in which clu ...
... stars is necessarily a far more complex process, and is less amenable to theoretical analysis. Therefore, at present, an understanding of how star clusters form must come largely from observations. The formation of globular clusters cannot yet be observed directly, but the circumstances in which clu ...
AST 207 Homework 2 Due 17 September 2010
... Alternatively, you can calculate. If the star is on the meridian at sunset, the star is 6h ahead of the sun. That makes the sun’s position R.A. of the star - 6h. The sun is at zero right ascension on Mar. 21. So, convert the sun’s position from R.A. into time and add it to Mar. 21 to find the date. ...
... Alternatively, you can calculate. If the star is on the meridian at sunset, the star is 6h ahead of the sun. That makes the sun’s position R.A. of the star - 6h. The sun is at zero right ascension on Mar. 21. So, convert the sun’s position from R.A. into time and add it to Mar. 21 to find the date. ...
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.