Undergraduate Project in Physics Alon Grubshtein Guided by Prof. Eduardo Guendelman
... It so happens, that there are no stable nuclei of masses 5 and 8, and as a result nuclear reactions rapidly diminish after making helium. Small amounts of other light elements are made, but it is not possible to make significant amounts of heavier nuclei such as carbon (mass 12). These require highe ...
... It so happens, that there are no stable nuclei of masses 5 and 8, and as a result nuclear reactions rapidly diminish after making helium. Small amounts of other light elements are made, but it is not possible to make significant amounts of heavier nuclei such as carbon (mass 12). These require highe ...
The Mass-loss Rate of Red Supergiant
... source viewed after processing by a dusty region. DUSTY has built in optical properties for the most common types of astronomical dust (‘warm’ and ‘cold’ silicates, silicates and graphite grains, amorphous carbon, SiC). It supports various analytical forms for the density distribution, and can perfo ...
... source viewed after processing by a dusty region. DUSTY has built in optical properties for the most common types of astronomical dust (‘warm’ and ‘cold’ silicates, silicates and graphite grains, amorphous carbon, SiC). It supports various analytical forms for the density distribution, and can perfo ...
Astronomy 101 - cloudfront.net
... Astronomy: Journey to the Cosmic Frontier, 5e, Fix, McGraw Hill, 2008 Purpose of the Course: Students are to understand the history and development of important concepts in the field of astronomy such as the debate between the Earth-centered and Sun-centered models of the solar system and the discov ...
... Astronomy: Journey to the Cosmic Frontier, 5e, Fix, McGraw Hill, 2008 Purpose of the Course: Students are to understand the history and development of important concepts in the field of astronomy such as the debate between the Earth-centered and Sun-centered models of the solar system and the discov ...
SGR and AXP – are they magnetars?
... second precursor interval with 4 absorption lines (RXTE/PCA 2-30 keV), Ibrahim et al. (2002) ...
... second precursor interval with 4 absorption lines (RXTE/PCA 2-30 keV), Ibrahim et al. (2002) ...
ON THE RADIAL ONSET OF CLUMPING IN THE WIND OF... J. M. Torrejón , N. S. Schulz , M. A. Nowak
... fraction6 of ∼54%. In order to minimize the modulation effect due to the NS spin in Figure 1 we have binned the whole light curve into 526 s bins. The observed light curves S and H show significant variability from bin to bin and and along the whole observation. This is quite common among HMXBs with ...
... fraction6 of ∼54%. In order to minimize the modulation effect due to the NS spin in Figure 1 we have binned the whole light curve into 526 s bins. The observed light curves S and H show significant variability from bin to bin and and along the whole observation. This is quite common among HMXBs with ...
Spectral lines analysis
... unit optical depth Macroturbulent limit • The size of the turbulent elements is small compared to the unit optical depth Microturbulent limit ...
... unit optical depth Macroturbulent limit • The size of the turbulent elements is small compared to the unit optical depth Microturbulent limit ...
Red Tide Specifications
... OFLV Variable Longpass Order-sorting Filters block second- and third-order light. These filters are optional. ...
... OFLV Variable Longpass Order-sorting Filters block second- and third-order light. These filters are optional. ...
THE NUMBER OF HABITABLE PLANETS IN THE MILKY WAY
... planet formed is habitable has to be assessed. Recent results of Lineweaver [1] can be used to calculate PFR as a function of cosmological time. The extent of HZs for different types of main-sequence stars has been determined by different authors [2, 3, 4]. In the following we apply our definition o ...
... planet formed is habitable has to be assessed. Recent results of Lineweaver [1] can be used to calculate PFR as a function of cosmological time. The extent of HZs for different types of main-sequence stars has been determined by different authors [2, 3, 4]. In the following we apply our definition o ...
Every large galaxy seems to have a supermassive black hole at its
... black holes in M87 and M60, two large galaxies in the Virgo cluster. The team found that astronomers may have underestimated the masses by a factor of two and suggests that similar revisions may be necessary for most, if not all, supermassive black holes in large galaxies. The upwardly revised figur ...
... black holes in M87 and M60, two large galaxies in the Virgo cluster. The team found that astronomers may have underestimated the masses by a factor of two and suggests that similar revisions may be necessary for most, if not all, supermassive black holes in large galaxies. The upwardly revised figur ...
Decoherence: Phases washed out or smeared recoil drift
... integration of emitted photons to those that are registered by a detector covering the solid angle ∆Ω (as seen from the atom) thereby selecting a particular subensemble of atoms [6]. The validity of this representation has not only been shown theoretically [6] but also in experiment [4, 5]. To compa ...
... integration of emitted photons to those that are registered by a detector covering the solid angle ∆Ω (as seen from the atom) thereby selecting a particular subensemble of atoms [6]. The validity of this representation has not only been shown theoretically [6] but also in experiment [4, 5]. To compa ...
Diode pumped distributed Bragg reflector lasers
... of the MEH-PPV. In addition, for all these blends the emission is dominated by the MEHPPV photoluminescence spectrum. This result is characteristic of efficient energy transfer, but does not by itself confirm its presence, as the concentrated dye film is also likely to exhibit a rapid non-radiative ...
... of the MEH-PPV. In addition, for all these blends the emission is dominated by the MEHPPV photoluminescence spectrum. This result is characteristic of efficient energy transfer, but does not by itself confirm its presence, as the concentrated dye film is also likely to exhibit a rapid non-radiative ...
Word Document - Montana State University Extended
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
Grade 8 Earth/Space Pretest Select the best answer to each
... About 1.2 billion km The Sun and the nearest star About 40 trillion km Earth’s surface and an orbiting satellite About 400 km The distance between which two objects or places would best be measured in light years? A. Boston and Los Angeles B. Our Sun and the nearest star C. Earth’s maximum distance ...
... About 1.2 billion km The Sun and the nearest star About 40 trillion km Earth’s surface and an orbiting satellite About 400 km The distance between which two objects or places would best be measured in light years? A. Boston and Los Angeles B. Our Sun and the nearest star C. Earth’s maximum distance ...
Grade 8 Earth/Space Pretest
... About 1.2 billion km The Sun and the nearest star About 40 trillion km Earth’s surface and an orbiting satellite About 400 km The distance between which two objects or places would best be measured in light years? A. Boston and Los Angeles B. Our Sun and the nearest star C. Earth’s maximum distance ...
... About 1.2 billion km The Sun and the nearest star About 40 trillion km Earth’s surface and an orbiting satellite About 400 km The distance between which two objects or places would best be measured in light years? A. Boston and Los Angeles B. Our Sun and the nearest star C. Earth’s maximum distance ...
13. Time and the past and future histories of the universe
... theories about our universe. We can conceive, even if it is difficult, of time ranging from 10-43 seconds to times of 10105 years (or if you wish 10112 seconds). We are starting to wonder if, for very short times, time itself must be quantized and we are starting to use such ideas to formulate theor ...
... theories about our universe. We can conceive, even if it is difficult, of time ranging from 10-43 seconds to times of 10105 years (or if you wish 10112 seconds). We are starting to wonder if, for very short times, time itself must be quantized and we are starting to use such ideas to formulate theor ...
In Pursuit of the Least Luminous Galaxies
... (3) reducing spurious detections, the primary source of which had been cluster galaxies misclassified as point sources [32, 34]. The features of the SDSS that facilitated (2) and (3) were its multiband photometry and accurate star-galaxy separation. The digital camera and uniformity of the survey al ...
... (3) reducing spurious detections, the primary source of which had been cluster galaxies misclassified as point sources [32, 34]. The features of the SDSS that facilitated (2) and (3) were its multiband photometry and accurate star-galaxy separation. The digital camera and uniformity of the survey al ...
The Michelson Interferometer
... for the other wavelength (say the shorter) this same spacing corresponds to some different whole number of wavelengths plus a half wavelength for the shorter wavelength. So the distance 2dA =(m2A+1/2 )2 . The two different values for m's are both integers so the two differ from each other by some i ...
... for the other wavelength (say the shorter) this same spacing corresponds to some different whole number of wavelengths plus a half wavelength for the shorter wavelength. So the distance 2dA =(m2A+1/2 )2 . The two different values for m's are both integers so the two differ from each other by some i ...
Pictures in the Sky Teacher`s Guide
... Have your students color the planets on page 7 as described below. You may have to read the descriptions to your students, then see if they can figure out which planet is which and color it. The Sun: The Sun is not a planet but a star. It seems bigger, brighter, and hotter than the stars we see at n ...
... Have your students color the planets on page 7 as described below. You may have to read the descriptions to your students, then see if they can figure out which planet is which and color it. The Sun: The Sun is not a planet but a star. It seems bigger, brighter, and hotter than the stars we see at n ...
LAST YEAR`S EXAM
... answer. Given that the microwave background was formed at a redshift z~1000, what was the approximate temperature of the Universe when decoupling occurred? Q7 Using the temperature of the CMB today, determine the current energy density in the CMB in terms of the critical density (i.e. determine !rad ...
... answer. Given that the microwave background was formed at a redshift z~1000, what was the approximate temperature of the Universe when decoupling occurred? Q7 Using the temperature of the CMB today, determine the current energy density in the CMB in terms of the critical density (i.e. determine !rad ...
Goal: To get to know the ins and outs of relativity
... • What would happen if we swapped our sun for a black hole of exact equal mass? • D) Nothing would happen to the orbit of the earth or the clocks on earth. • Black holes are not vacuum cleaners. They obey gravity just like everything else. • In fact it is harder to run into a black hole because it i ...
... • What would happen if we swapped our sun for a black hole of exact equal mass? • D) Nothing would happen to the orbit of the earth or the clocks on earth. • Black holes are not vacuum cleaners. They obey gravity just like everything else. • In fact it is harder to run into a black hole because it i ...
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.