DNA/RNA nucleotides and nucleosides: direct measurement of
... nucleobase thymine, vibrational relaxation most likely occurs on a time scale shorter than the excited-state lifetime. This idea was based on the observation that both the ¯uorescence spectrum and the anisotropy remain unchanged upon varying the excitation wavelength from near the 0±0 transition at ...
... nucleobase thymine, vibrational relaxation most likely occurs on a time scale shorter than the excited-state lifetime. This idea was based on the observation that both the ¯uorescence spectrum and the anisotropy remain unchanged upon varying the excitation wavelength from near the 0±0 transition at ...
110 - Institute for Astronomy
... We explore the infrared M band (4.7 µm) spectrum of the class I protostar L1489 IRS in the Taurus Molecular Cloud. This is the highest resolution wide coverage spectrum at this wavelength of a low mass protostar observed to date (R =25,000; ∆v =12 km s−1 ). A large number of narrow absorption lines ...
... We explore the infrared M band (4.7 µm) spectrum of the class I protostar L1489 IRS in the Taurus Molecular Cloud. This is the highest resolution wide coverage spectrum at this wavelength of a low mass protostar observed to date (R =25,000; ∆v =12 km s−1 ). A large number of narrow absorption lines ...
Quantum Interference 1 Claude Cohen-Tannoudji Scott Lectures Cambridge, March 7
... superposition of vibration states of a molecule. One gets in this way a wave packet which oscillates at the vibration frequency of the molecule. A second ultra short laser pulse, shifted in time with respect to the first one, detects the evolution of the wave packet. Recent extension to the attoseco ...
... superposition of vibration states of a molecule. One gets in this way a wave packet which oscillates at the vibration frequency of the molecule. A second ultra short laser pulse, shifted in time with respect to the first one, detects the evolution of the wave packet. Recent extension to the attoseco ...
The Cosmic Perspective Star Stuff
... cool and dim after their initial formation. c) Nuclear fission would be impossible and elements heavier than iron would not exist. d) Stars would continue burning heavier and heavier elements and the universe would have far more lead and uranium. e) Stars would be much less dense, and therefore l ...
... cool and dim after their initial formation. c) Nuclear fission would be impossible and elements heavier than iron would not exist. d) Stars would continue burning heavier and heavier elements and the universe would have far more lead and uranium. e) Stars would be much less dense, and therefore l ...
Word Document - University of Iowa Astrophysics
... This lab exercise does not require a formal writeup. Data taking, drawings, and calculations are to be entered on this form and handed to the teaching assistant. However, you need to preserve your results for later in the semester when you will measure angular sizes of other objects, then use known ...
... This lab exercise does not require a formal writeup. Data taking, drawings, and calculations are to be entered on this form and handed to the teaching assistant. However, you need to preserve your results for later in the semester when you will measure angular sizes of other objects, then use known ...
Deep O/IR Survey Of Chandra Galactic Bulge Fields
... analysis suggest that a large subset of the sources are intrinsically hard, and reasonably described by a power law with photon index =0. The typical luminosities of these objects are in the range 10 3133 erg/s. The largest well studied class of objects fitting this description are high magnetic fie ...
... analysis suggest that a large subset of the sources are intrinsically hard, and reasonably described by a power law with photon index =0. The typical luminosities of these objects are in the range 10 3133 erg/s. The largest well studied class of objects fitting this description are high magnetic fie ...
The Stellar Population And Origin Of The Mysterious K.V. Getman
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
Document
... This also means that if you know the distance to a star (d), and the apparent magnitude (which you can measure by the size of an image on a photograph), then you can use this equation to find distance... Example if you are intersted. Star A has a magnitude of 5 and an absolte magnitude of 12. Thus: ...
... This also means that if you know the distance to a star (d), and the apparent magnitude (which you can measure by the size of an image on a photograph), then you can use this equation to find distance... Example if you are intersted. Star A has a magnitude of 5 and an absolte magnitude of 12. Thus: ...
hydrogen deficient stars and related objects
... The central and most startling problem in the field of helium stars, something which has puzzled us from the very beginning, is how extreme helium stars are formed and how a star of one solar mass may get rid of all its original hydrogen. A few rivalling hypotheses are known but up to now none of th ...
... The central and most startling problem in the field of helium stars, something which has puzzled us from the very beginning, is how extreme helium stars are formed and how a star of one solar mass may get rid of all its original hydrogen. A few rivalling hypotheses are known but up to now none of th ...
Grossmugl Star Walk Installation
... 600 and 500 BC. This was the time when Babylon experienced one of its wealthiest periods under king Nebuchadnezzar II, democracy was invented in Athens and the city of Rome was still a small kingdom, far from the great empire it would later become. When stargazing at this historic site one can almos ...
... 600 and 500 BC. This was the time when Babylon experienced one of its wealthiest periods under king Nebuchadnezzar II, democracy was invented in Athens and the city of Rome was still a small kingdom, far from the great empire it would later become. When stargazing at this historic site one can almos ...
OPTICS
... A good diffraction grating has 2.50 X 103lines/cm. What is the distance between two lines in the grating? 1/2.50 X 103lines/cm= .00040cm Example: Using a grating with a spacing of 4.00 X 10-4cm, a red line appears 16.5 cm from the central line on a screen. The screen is 1.00m from the grating. What ...
... A good diffraction grating has 2.50 X 103lines/cm. What is the distance between two lines in the grating? 1/2.50 X 103lines/cm= .00040cm Example: Using a grating with a spacing of 4.00 X 10-4cm, a red line appears 16.5 cm from the central line on a screen. The screen is 1.00m from the grating. What ...
(Digital Micro-Mirror Device) Based Multi-Object
... arbitrary regions of interest. In addition it will be possible to do multi-object spectroscopy by carefully designing a mask that allows several spectrally different objects in the scene to be rapidly measured in sequence. We will focus on spectral measurements in the visual and near-infrared part o ...
... arbitrary regions of interest. In addition it will be possible to do multi-object spectroscopy by carefully designing a mask that allows several spectrally different objects in the scene to be rapidly measured in sequence. We will focus on spectral measurements in the visual and near-infrared part o ...
Edgar Allan Poe: the first man to conceive a Newtonian evolving
... Poe takes the size the Universe of about 3 million light years, as estimated by William Herschel from the limiting magnitude of the objects he was able to see with his telescope: yet so far removed from us are some of the "nebulae" that even light, speeding with this velocity, could not and does not ...
... Poe takes the size the Universe of about 3 million light years, as estimated by William Herschel from the limiting magnitude of the objects he was able to see with his telescope: yet so far removed from us are some of the "nebulae" that even light, speeding with this velocity, could not and does not ...
Powerpoint file
... There are only two astronomical bodies that have a radius ~ 1 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
... There are only two astronomical bodies that have a radius ~ 1 REarth: 1. White Dwarf 2. A terrestrial planet White Dwarfs have a mass of ~ 1 Solar Mass, so the radial velocity amplitude should be ~ 100s km/s. This is excluded by low precision radial velocity measurements. ...
Observing Orion
... furthest left on Orion's Belt. The flame nebula is also shown in this photo. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which is similar to that of a horse's head. It was first noticed in 1888 by Williamina Fleming on a photographic ...
... furthest left on Orion's Belt. The flame nebula is also shown in this photo. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which is similar to that of a horse's head. It was first noticed in 1888 by Williamina Fleming on a photographic ...
Presentazione di PowerPoint
... The satellite falls slower than expected from classical theory. The Coulomb logarithm is position-dependent, lower than expected at almost all positions and does not depend on Ms, Rs, r0 and (in the range explored). ...
... The satellite falls slower than expected from classical theory. The Coulomb logarithm is position-dependent, lower than expected at almost all positions and does not depend on Ms, Rs, r0 and (in the range explored). ...
Planets and Debris Disks: Results from a Spitzer/MIPS Search for IR
... an uncertainty of 0.2 dex. Their calibration is largely based on young stars. To verify its application to older ones, we constructed a Hertzsprung-Russell diagram in MK vs. V-K for stars with parallaxes determined to 3% or better. Much of the scatter on this diagram is due to metallicity difference ...
... an uncertainty of 0.2 dex. Their calibration is largely based on young stars. To verify its application to older ones, we constructed a Hertzsprung-Russell diagram in MK vs. V-K for stars with parallaxes determined to 3% or better. Much of the scatter on this diagram is due to metallicity difference ...
Sky Watcher - Boise Astronomical Society
... The moon passes close to the Pleiades star cluster on the morning of the 21st and the Hyades star cluster on the morning of the 22nd. The Pleiades and Hyades are examples of loose groupings of stars called galactic star clusters. The other type of star cluster is a globular cluster and they appear a ...
... The moon passes close to the Pleiades star cluster on the morning of the 21st and the Hyades star cluster on the morning of the 22nd. The Pleiades and Hyades are examples of loose groupings of stars called galactic star clusters. The other type of star cluster is a globular cluster and they appear a ...
GROUP V: Summary talk
... hard to understand: what controls frequency drift rates of different features? ...
... hard to understand: what controls frequency drift rates of different features? ...
History of the 2.7 K Temperature Prior to Penzias and Wilson
... fourth root of 15,200,000, or about 60. Moreover, this number should be regarded as a minimum, as the measurements of Captain Abney taken in South Kensington may have been distorted by some foreign source of light. We conclude that the radiation of the stars alone would maintain the test particle we ...
... fourth root of 15,200,000, or about 60. Moreover, this number should be regarded as a minimum, as the measurements of Captain Abney taken in South Kensington may have been distorted by some foreign source of light. We conclude that the radiation of the stars alone would maintain the test particle we ...
3.1 Electric Charge
... “In order that the effects of two portions of light may thus be combined, it is necessary that they be derived from the same origin, and that they arrive at the same point by different paths in directions not much deviating from each other. This deviation may be produced in one or both the portions ...
... “In order that the effects of two portions of light may thus be combined, it is necessary that they be derived from the same origin, and that they arrive at the same point by different paths in directions not much deviating from each other. This deviation may be produced in one or both the portions ...
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.