Lecture 12
... absolute magnitude, you can find the star's distance (using the inverse square law of brightness). • If you know a star's apparent magnitude and distance, you can find the star's luminosity. • The luminosity is an intrinsic property of the star, not based on how far away it is. • A star's luminosity ...
... absolute magnitude, you can find the star's distance (using the inverse square law of brightness). • If you know a star's apparent magnitude and distance, you can find the star's luminosity. • The luminosity is an intrinsic property of the star, not based on how far away it is. • A star's luminosity ...
Transparencies - Rencontres de Moriond
... To test the cosmological model by measuring the predicted drift in the redshift of distant sources as a function of time (Sandage ,1962) ...
... To test the cosmological model by measuring the predicted drift in the redshift of distant sources as a function of time (Sandage ,1962) ...
PLANETARY SCIENCE
... The Sun is a luminous object that gives off light. The Sun is a source of light that illuminates Earth during the day. (Check out www.fossweb.com Planetary Science day & night to help you understand these ideas better.) When light falls on an opaque object, the portion in the path of the light is ...
... The Sun is a luminous object that gives off light. The Sun is a source of light that illuminates Earth during the day. (Check out www.fossweb.com Planetary Science day & night to help you understand these ideas better.) When light falls on an opaque object, the portion in the path of the light is ...
The Evening Sky Map
... Double Star – Two stars that appear close to each other in the sky; either linked by gravity so that they orbit each other (binary star) or lying at different distances from Earth (optical double). Apparent separation of stars is given in seconds of arc ("). Ecliptic – The path of the Sun’s center o ...
... Double Star – Two stars that appear close to each other in the sky; either linked by gravity so that they orbit each other (binary star) or lying at different distances from Earth (optical double). Apparent separation of stars is given in seconds of arc ("). Ecliptic – The path of the Sun’s center o ...
Masers (Microwave Amplification by Stimulated Electromagnetic
... What this means is that a molecule is in a certain environment where its outer electrons are in a high energy state and is bombarded by a photon (in this case a microwave) which causes the electrons to ‘jump down’ in energy level and release another photon so that both photons have the same phase, f ...
... What this means is that a molecule is in a certain environment where its outer electrons are in a high energy state and is bombarded by a photon (in this case a microwave) which causes the electrons to ‘jump down’ in energy level and release another photon so that both photons have the same phase, f ...
Word version of Episode 705
... This exercise is intended to give practice in converting Hubble’s constant to an age of the Universe. It is important for students to understand the connection between this constant and the age of the Universe, and this point will need careful explanation for some students. Important points can also ...
... This exercise is intended to give practice in converting Hubble’s constant to an age of the Universe. It is important for students to understand the connection between this constant and the age of the Universe, and this point will need careful explanation for some students. Important points can also ...
High Energy Phenomena in Supergiant X-ray Binaries - HAL-Insu
... circumstellar medium, by fitting their spectral energy distribution (SED). The main results of this study are that 15 of these IGRs are identified as HMXBs, and among them 12 HMXBs contain massive and luminous early-type companion stars. By combining optical, NIR and MIR photometry, and fitting thei ...
... circumstellar medium, by fitting their spectral energy distribution (SED). The main results of this study are that 15 of these IGRs are identified as HMXBs, and among them 12 HMXBs contain massive and luminous early-type companion stars. By combining optical, NIR and MIR photometry, and fitting thei ...
Episode 705: Cosmology - Teaching Advanced Physics
... This exercise is intended to give practice in converting Hubble’s constant to an age of the Universe. It is important for students to understand the connection between this constant and the age of the Universe, and this point will need careful explanation for some students. Important points can also ...
... This exercise is intended to give practice in converting Hubble’s constant to an age of the Universe. It is important for students to understand the connection between this constant and the age of the Universe, and this point will need careful explanation for some students. Important points can also ...
Planets of Our, and Other, Solar Systems
... • The “Fast” scenario: eddys form, merge. Eddys include not just dust (which is only ~2% of total mass recall), but hydrogen and helium as well (much more mass here). The growth rate would be much faster as gravity would kick in right away for such massive objects. ...
... • The “Fast” scenario: eddys form, merge. Eddys include not just dust (which is only ~2% of total mass recall), but hydrogen and helium as well (much more mass here). The growth rate would be much faster as gravity would kick in right away for such massive objects. ...
The Cosmic Microwave Background and the Big Bang Theory of the
... bodies moving under the influence of gravity also have their paths deflected by the curvature of space. The curvature actually takes place in 4-dimensional space-time, which makes it even more difficult to visualize, thus also accounting for the differences between clocks in a gravitational field. T ...
... bodies moving under the influence of gravity also have their paths deflected by the curvature of space. The curvature actually takes place in 4-dimensional space-time, which makes it even more difficult to visualize, thus also accounting for the differences between clocks in a gravitational field. T ...
STARS IN HYDROSTATIC EQUILIBRIUM Gravitational energy and
... The non-relativistic case is equivalent to the well known virial theorem. The ultra-relativistic results is somewhat paradoxical, with the total energy of a star being zero. This result is only approximate, as it relates to the case when all particles within the star are moving with the speed of lig ...
... The non-relativistic case is equivalent to the well known virial theorem. The ultra-relativistic results is somewhat paradoxical, with the total energy of a star being zero. This result is only approximate, as it relates to the case when all particles within the star are moving with the speed of lig ...
Stellar dust production and composition in the Magellanic Clouds F. Kemper
... by mass (Sloan et al., 2006a). A comprehensive study of all oxygen-rich AGB stars and RSG in the LMC and SMC for which IRS spectroscopy is available, shows that most objects do not show significant crystallinity in their silicates, although in some cases, the strength of the crystalline silicate fea ...
... by mass (Sloan et al., 2006a). A comprehensive study of all oxygen-rich AGB stars and RSG in the LMC and SMC for which IRS spectroscopy is available, shows that most objects do not show significant crystallinity in their silicates, although in some cases, the strength of the crystalline silicate fea ...
14_04_2014 - IB Phys..
... • The light that enters an optic fibre travels down the length of the fibre and the arrival of light is registered by a photodiode • In the absence of any light, falling on the photodiode, the current is zero • When light of a specific wavelength falls on the photodiode, a current flows. The magnitu ...
... • The light that enters an optic fibre travels down the length of the fibre and the arrival of light is registered by a photodiode • In the absence of any light, falling on the photodiode, the current is zero • When light of a specific wavelength falls on the photodiode, a current flows. The magnitu ...
Acousto-Optic Devices - Panasonic Industrial Devices
... The acousto-optic tunable filter can select diffracted light wavelength by means of frequency modulation and can modulate output intensity by means of amplitude modulation. ...
... The acousto-optic tunable filter can select diffracted light wavelength by means of frequency modulation and can modulate output intensity by means of amplitude modulation. ...
1B11 Foundations of Astronomy Star names and magnitudes
... • Parallax – Nearby objects appear to move faster with respect to more distant objects as you go past them. This effect is called parallax and is used to measure the distances to nearby stars. ...
... • Parallax – Nearby objects appear to move faster with respect to more distant objects as you go past them. This effect is called parallax and is used to measure the distances to nearby stars. ...
Classification_of_Stars_By_Luminosity
... produced by the star but is simply a measure of how bright it appears to be from Earth. • (Some bright stars are simply close neighbours while other giant stars may appear equally bright but are also very distant.) ...
... produced by the star but is simply a measure of how bright it appears to be from Earth. • (Some bright stars are simply close neighbours while other giant stars may appear equally bright but are also very distant.) ...
The Star of Bethlehem: a Type Ia/Ic Supernova in the Andromeda
... been conceived nine months earlier, on the winter solstice, which as Hughes[14] has pointed out, was thought to be December 25 in ancient times. Christian doctrine has always[24] held that life begins at conception, not at birth. For Christians, then, God entered the world at the instant of Jesus’ c ...
... been conceived nine months earlier, on the winter solstice, which as Hughes[14] has pointed out, was thought to be December 25 in ancient times. Christian doctrine has always[24] held that life begins at conception, not at birth. For Christians, then, God entered the world at the instant of Jesus’ c ...
Academia Sinica Press Release
... LL Pegasi is a mass-losing giant star with a size of 200 times or more that of the Sun. Among the stellar evolutionary phases, it is currently on the asymptotic giant branch, which reflects the future of the Sun a few billion years from now. This star was spotlighted about 10 years ago due to a pict ...
... LL Pegasi is a mass-losing giant star with a size of 200 times or more that of the Sun. Among the stellar evolutionary phases, it is currently on the asymptotic giant branch, which reflects the future of the Sun a few billion years from now. This star was spotlighted about 10 years ago due to a pict ...
IDENTIFICATION OF MAIN-SEQUENCE STARS WITH MID
... SOFIA, MS 211-3, NASA-Ames Research Center, Moffett Field, CA 94035-1000. ...
... SOFIA, MS 211-3, NASA-Ames Research Center, Moffett Field, CA 94035-1000. ...
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 ...
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.