Astronomy Astrophysics The accretion environment in Vela X-1 during a flaring period using
... kilo-seconds down to fractions of the pulse period. We have not undertaken a detailed analysis of the timing behaviour on time scales below the pulse period. A corresponding study is under way and will be published separately. In this work a mostly stable pulse period of 283.389 ± 0.004 s is found. ...
... kilo-seconds down to fractions of the pulse period. We have not undertaken a detailed analysis of the timing behaviour on time scales below the pulse period. A corresponding study is under way and will be published separately. In this work a mostly stable pulse period of 283.389 ± 0.004 s is found. ...
Photoassociation of ultracold LiRb molecules: Observation of high efficiency
... production rate of 3.5 × 107 s−1 . We will elaborate on this particular PA line below but first discuss the assignment of the observed PA lines. The theoretical potential energy curves at large internuclear separations (R) depend on the C6 coefficients [28–30], an example of which is shown for LiRb ...
... production rate of 3.5 × 107 s−1 . We will elaborate on this particular PA line below but first discuss the assignment of the observed PA lines. The theoretical potential energy curves at large internuclear separations (R) depend on the C6 coefficients [28–30], an example of which is shown for LiRb ...
microquasars
... -THE PHYSICS OF RELATIVISTIC JETS FROM BH’s -THE CONNECTION BETWEEN ACCRETION & EJECTION -THE FORMATION OF BLACK HOLES AND NEUTRON STARS: Can stars of >40 Msolar end as neutron stars rather than BHs ? Do BHs of >10 Msolar form promptly rather than in bright SN ? ...
... -THE PHYSICS OF RELATIVISTIC JETS FROM BH’s -THE CONNECTION BETWEEN ACCRETION & EJECTION -THE FORMATION OF BLACK HOLES AND NEUTRON STARS: Can stars of >40 Msolar end as neutron stars rather than BHs ? Do BHs of >10 Msolar form promptly rather than in bright SN ? ...
NAS biographical memoir of Martin Schwarzschild
... of World War I—when his father, Karl Schwarzschild, was director of the renowned Potsdam Observatory. This institution, said to have been visited by Einstein in 1913, was designing a solar observatory for testing the general theory of relativity, which had been published in 1911. Before any results ...
... of World War I—when his father, Karl Schwarzschild, was director of the renowned Potsdam Observatory. This institution, said to have been visited by Einstein in 1913, was designing a solar observatory for testing the general theory of relativity, which had been published in 1911. Before any results ...
IRC −10414: a bow-shock-producing red supergiant star
... Most runaway OB stars, like the majority of massive stars residing in their parent clusters, go through the red supergiant (RSG) phase during their lifetimes. Nonetheless, although many dozens of massive runaways were found to be associated with bow shocks, only two RSG bow-shock-producing stars, Be ...
... Most runaway OB stars, like the majority of massive stars residing in their parent clusters, go through the red supergiant (RSG) phase during their lifetimes. Nonetheless, although many dozens of massive runaways were found to be associated with bow shocks, only two RSG bow-shock-producing stars, Be ...
Types of polarization
... Natural or unpolarized light from an ordinary source such as a discharge lamp consists of the total output from a very large number of randomly oriented atomic emitters. Each excited atom radiates a linearly polarized wave train for ~ 10 -8 s and new wave trains are constantly emitted so that the ov ...
... Natural or unpolarized light from an ordinary source such as a discharge lamp consists of the total output from a very large number of randomly oriented atomic emitters. Each excited atom radiates a linearly polarized wave train for ~ 10 -8 s and new wave trains are constantly emitted so that the ov ...
KEPLER William Borucki, PI
... For false positive elimination and understanding of the Kepler planetary candidates: 1. 300 m/s RV measurements, mr=9-16, avg of 2.5 spectra each Terrestrial planets Case 1, no terrestrial planets ~140 false positives (105 go away with DIA after 4 years) ~131 hr on 2m telescope = ~ 22 nights @ $1500 ...
... For false positive elimination and understanding of the Kepler planetary candidates: 1. 300 m/s RV measurements, mr=9-16, avg of 2.5 spectra each Terrestrial planets Case 1, no terrestrial planets ~140 false positives (105 go away with DIA after 4 years) ~131 hr on 2m telescope = ~ 22 nights @ $1500 ...
Fluorescence, Quenching, and Applications Thereof
... was obtained and recrystallized twice Absorption spectra were taken with a Cary ...
... was obtained and recrystallized twice Absorption spectra were taken with a Cary ...
Lecture 17
... Lasing action is similar to LED emission, but there are some additional device structures that need to be incorporated. The main requirement for an LED is that one side of the device should have transparent conductors and the other side should be reflecting so that the light can be extracted from on ...
... Lasing action is similar to LED emission, but there are some additional device structures that need to be incorporated. The main requirement for an LED is that one side of the device should have transparent conductors and the other side should be reflecting so that the light can be extracted from on ...
When we look at a neighboring galaxy (such as M31, the
... The Andromeda Galaxy, also known as M31, is a spiral galaxy physically larger, but less massive, than our Milky Way Galaxy. The Andromeda is the largest member of the Local Group, a cluster of about 30 galaxies that are gravitationally attracted to one another. At a distance of 2.5 million light-yea ...
... The Andromeda Galaxy, also known as M31, is a spiral galaxy physically larger, but less massive, than our Milky Way Galaxy. The Andromeda is the largest member of the Local Group, a cluster of about 30 galaxies that are gravitationally attracted to one another. At a distance of 2.5 million light-yea ...
O A
... waveguide refractive index will lead the resonator wavelength shift. Then, wavelength λ3 that passed through the ring resonator will propagate along the waveguide and partially coupled into Coupler 2. The output will drop at Rx2 (Kirankumar R. Hiremath, 2011). ...
... waveguide refractive index will lead the resonator wavelength shift. Then, wavelength λ3 that passed through the ring resonator will propagate along the waveguide and partially coupled into Coupler 2. The output will drop at Rx2 (Kirankumar R. Hiremath, 2011). ...
Introduction
... In the year 1800 the astronomer Friedrich Wilhelm Herschel analyzed the spectrum of sunlight. Herschel created the spectrum by directing sunlight through a glass prism so that the light was divided into its different colors. He measured the heating ability of each color using thermometers with black ...
... In the year 1800 the astronomer Friedrich Wilhelm Herschel analyzed the spectrum of sunlight. Herschel created the spectrum by directing sunlight through a glass prism so that the light was divided into its different colors. He measured the heating ability of each color using thermometers with black ...
Sub-Nanoliter Spectroscopic Gas Sensor
... that optical fiber based SC sensors are capable of detecting single and/or multiple gases that have absorption spectra in the near infrared region. This includes O2, NO2, HF, HBr, H2O, C2H2, HI, NH3, CO, CO2, H2S, CH4, and HCl [16]. In general, when the IR radiation passes through a gas cell, a part ...
... that optical fiber based SC sensors are capable of detecting single and/or multiple gases that have absorption spectra in the near infrared region. This includes O2, NO2, HF, HBr, H2O, C2H2, HI, NH3, CO, CO2, H2S, CH4, and HCl [16]. In general, when the IR radiation passes through a gas cell, a part ...
EX PLANET E - Institute of Physics
... from the star and energy radiated into space. You may want to discuss a planets energy balance at the end of the activity. ...
... from the star and energy radiated into space. You may want to discuss a planets energy balance at the end of the activity. ...
Lithium production by thermohaline mixing in low
... hydrogen burning re-ignites. At the top of the hydrogen burning shell, two important reactions are occurring. The 3 He(3 He,2p)4 He lowers the mean molecular weight and thermohaline mixing starts to occur. In addition, the fusion of 3 He with 4 He produces 7 Be. Thermohaline mixing transports this n ...
... hydrogen burning re-ignites. At the top of the hydrogen burning shell, two important reactions are occurring. The 3 He(3 He,2p)4 He lowers the mean molecular weight and thermohaline mixing starts to occur. In addition, the fusion of 3 He with 4 He produces 7 Be. Thermohaline mixing transports this n ...
1 Introduction to Optics and Photophysics - Wiley-VCH
... Sound is also a wave, but in this case, instead of the electromagnetic field, it is the air pressure that oscillates at a much slower rate. In the case of light, it is the electric field oscillating at a very high frequency. The electric field is also responsible for hair clinging to a synthetic jumper ...
... Sound is also a wave, but in this case, instead of the electromagnetic field, it is the air pressure that oscillates at a much slower rate. In the case of light, it is the electric field oscillating at a very high frequency. The electric field is also responsible for hair clinging to a synthetic jumper ...
Orbital Orientations of Exoplanets: Hat-p-4b is Prograde and Hat
... Another difference in our analysis is that we fitted the available photometric data along with the transit-night RV data, because the new data offer better constraints on the transit ephemeris, depth, duration, and partial duration. Our photometric model was taken from the Transit Light Curve projec ...
... Another difference in our analysis is that we fitted the available photometric data along with the transit-night RV data, because the new data offer better constraints on the transit ephemeris, depth, duration, and partial duration. Our photometric model was taken from the Transit Light Curve projec ...
Data Provided:
... where ω0 is the angular velocity of the local standard of rest (LSR) around the Galactic centre in km s−1 kpc−1 , vc is the circular velocity in km s−1 , and r is the radial distance in kpc. Currently the best estimates of Oort’s constants and the distance to the centre of the Milky Way are A = 14.8 ...
... where ω0 is the angular velocity of the local standard of rest (LSR) around the Galactic centre in km s−1 kpc−1 , vc is the circular velocity in km s−1 , and r is the radial distance in kpc. Currently the best estimates of Oort’s constants and the distance to the centre of the Milky Way are A = 14.8 ...
Larger, high-res file, best for printing
... 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 ...
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.